Fiche technique pour LT1632, LT1633 de Analog Devices Inc.

Erreurs/commentaires sur la fiche technique

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LT1632/LT1633

sn1632 16323fs

45MHz, 45V/µs, Dual/Quad

Rail-to-Rail Input and Output

Precision Op Amps

FEATURES

■

Gain-Bandwidth Product: 45MHz

■

Slew Rate: 45V/µs

■

Low Supply Current per Amplifier: 4.3mA

■

Input Common Mode Range Includes Both Rails

■

Output Swings Rail-to-Rail

■

Input Offset Voltage, Rail-to-Rail: 1350µV Max

■

Input Offset Current: 440nA Max

■

Input Bias Current: 2.2µA Max

■

Open-Loop Gain: 800V/mV Min

■

Low Input Noise Voltage: 12nV/√Hz Typ

■

Low Distortion: –92dBc at 100kHz

■

Wide Supply Range: 2.7V to ±15V

■

Large Output Drive Current: 35mA Min

■

Dual in 8-Pin PDIP and SO Packages

The LT

1632/LT1633 are dual/quad, rail-to-rail input and

output op amps with a 45MHz gain-bandwidth product and

a 45V/µs slew rate.

The LT1632/LT1633 have excellent DC precision over the

full range of operation. Input offset voltage is typically less

than 400µV and the minimum open-loop gain of 0.8

million into a 10k load virtually eliminates all gain error.

Common mode rejection is typically 83dB over the full rail-

to-rail input range when on a single 5V supply for excellent

noninverting performance.

The LT1632/LT1633 maintain their performance for sup-

plies from 2.7V to 36V and are specified at 3V, 5V and ±15V

supplies. The inputs can be driven beyond the supplies

without damage or phase reversal of the output. The

output delivers load currents in excess of 35mA.

The LT1632 is available in 8-pin PDIP and SO packages

with the standard dual op amp pinout. The LT1633 features

the standard quad op amp configuration and is available in

a 14-pin plastic SO package. These devices can be used as

plug-in replacements for many standard op amps to

improve input/output range and performance.

DESCRIPTION

APPLICATIONS

■

Active Filters

■

Rail-to-Rail Buffer Amplifiers

■

Driving A/D Converters

■

Low Voltage Signal Processing

■

Battery-Powered Systems

, LTC and LT are registered trademarks of Linear Technology Corporation.

FREQUENCY (Hz)

VOLTAGE GAIN (dB)

–10

–20

–30

–40

–50

–60

–70

100 10k 100k 10M

1632/33 TA02

1k 1M

COMMON MODE INPUT

DIFFERENTIAL INPUT

= 3V

= 100

TYPICAL APPLICATION

Single Supply, 40dB Gain, 550kHz Instrumentation Amplifier

–

1/2 LT1632

VIN–

VIN+

VOUT

1630/31 F02

20k

432Ω

–

1/2 LT1632

Frequency Response

HBSOLUTE ﬂXI U ﬂﬂTl G V/x‘ 33433343: _>_ _>_ EEEEEEE 3333 9% E E E E

LT1632/LT1633

sn1632 16323fs

ABSOLUTE MAXIMUM RATINGS

Total Supply Voltage (V

to V

–

) ............................. 36V

Input Current ..................................................... ±10mA

Output Short-Circuit Duration (Note 2)........ Continuous

Operating Temperature Range ................ –40°C to 85°C

Specified Temperature Range (Note 4)..... –40°C to 85°C

Junction Temperature.......................................... 150°C

Storage Temperature Range ................. –65°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300°C

Consult factory for Military and Industrial grade parts.

PACKAGE/ORDER INFORMATION

ORDER PART

NUMBER

LT1632CN8

LT1632CS8

LT1632IN8

LT1632IS8

ORDER PART

NUMBER

JMAX

= 150°C, θ

= 150°C/ W

JMAX

= 150°C, θ

= 130°C/ W (N8)

JMAX

= 150°C, θ

= 190°C/ W (S8)

LT1633CS

LT1633IS

S8 PART MARKING

TOP VIEW

OUT A

–IN A

+IN A

–

OUT B

–IN B

+IN B

S8 PACKAGE

8-LEAD PLASTIC SO

N8 PACKAGE

8-LEAD PDIP

1632

1632I

TOP VIEW

S PACKAGE

14-LEAD PLASTIC SO

OUTA

–IN A

+IN A

+IN B

–IN B

OUT B

OUT D

–IN D

+IN D

–

+IN C

–IN C

OUT C

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage V

= V

400 1350 µV

= V

–

400 1350 µV

∆V

Input Offset Shift V

= V

–

to V

350 1500 µV

Input Offset Voltage Match (Channel-to-Channel) V

= V

–

, V

(Note 5) 500 2300 µV

Input Bias Current V

= V

0 1.15 2.2 µA

= V

–

–2.2 –1.15 0 µA

∆I

Input Bias Current Shift V

= V

–

to V

2.3 4.4 µA

Input Bias Current Match (Channel-to-Channel) V

= V

(Note 5) 50 880 nA

= V

–

(Note 5) 50 880 nA

Input Offset Current V

= V

40 440 nA

= V

–

40 440 nA

∆I

Input Offset Current Shift V

= V

–

to V

80 880 nA

Input Noise Voltage 0.1Hz to 10Hz 400 nV

P-P

Input Noise Voltage Density f = 1kHz 12 nV/√Hz

Input Noise Current Density f = 1kHz 1.6 pA/√Hz

Input Capacitance 5pF

VOL

Large-Signal Voltage Gain V

= 5V, V

= 300mV to 4.7V, R

= 10k 450 2000 V/mV

= 3V, V

= 300mV to 2.7V, R

= 10k 350 1500 V/mV

CMRR Common Mode Rejection Ratio V

= 5V, V

= V

–

to V

70 83 dB

= 3V, V

= V

–

to V

66 81 dB

TA = 25°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.

(Note 1)

LT1632/LT1633

sn1632 16323fs

ELECTRICAL CHARACTERISTICS

TA = 25°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

CMRR Match (Channel-to-Channel) (Note 5) V

= 5V, V

= V

–

to V

65 85 dB

= 3V, V

= V

–

to V

61 82 dB

PSRR Power Supply Rejection Ratio V

= 2.7V to 12V, V

= V

= 0.5V 82 100 dB

PSRR Match (Channel-to-Channel) (Note 5) V

= 2.7V to 12V, V

= V

= 0.5V 79 101 dB

Minimum Supply Voltage (Note 9) V

= V

= 0.5V 2.6 2.7 V

Output Voltage Swing Low (Note 6) No Load 15 30 mV

SINK

= 0.5mA 32 60 mV

SINK

= 25mA, V

= 5V 600 1200 mV

SINK

= 20mA, V

= 3V 500 1000 mV

Output Voltage Swing High (Note 6) No Load 16 40 mV

SOURCE

= 0.5mA 42 80 mV

SOURCE

= 20mA, V

= 5V 910 1800 mV

SOURCE

= 15mA, V

= 3V 680 1400 mV

Short-Circuit Current V

= 5V ±20 ±40 mA

= 3V ±15 ±30 mA

Supply Current per Amplifier 4.3 5.2 mA

GBW Gain-Bandwidth Product (Note 7) f = 100kHz 22 45 MHz

SR Slew Rate (Note 8) V

= 5V, A

= –1, R

= Open, V

= 4V 13 27 V/µs

= 3V, A

= –1, R

= Open 11 22 V/µs

Settling Time V

= 5V, A

= 1, R

= 1k, 400 ns

0.01%, V

STEP

= 2V

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage V

= V

– 0.1V ●600 2000 µV

= V

–

+ 0.2V ●600 2000 µV

TC Input Offset Voltage Drift (Note 3) ●815µV/°C

= V

– 0.1V ●2.5 7 µV/°C

∆V

Input Offset Voltage Shift V

= V

–

+ 0.2V to V

– 0.1V ●400 2300 µV

Input Offset Voltage Match (Channel-to-Channel) V

= V

–

+ 0.2V, V

– 0.1V (Note 5) ●700 3750 µV

Input Bias Current V

= V

– 0.1V ● 0 1.3 2.6 µA

= V

–

+ 0.2V ●–2.6 –1.3 0 µA

∆I

Input Bias Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●2.6 5.2 µA

Input Bias Current Match (Channel-to-Channel) V

= V

– 0.1V (Note 5) ●50 1040 nA

= V

–

+ 0.2V (Note 5) ●50 1040 nA

Input Offset Current V

= V

– 0.1V ●40 520 nA

= V

–

+ 0.2V ●40 520 nA

∆I

Input Offset Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●80 1040 nA

VOL

Large-Signal Voltage Gain V

= 5V, V

= 300mV to 4.7V, R

= 10k ●300 1100 V/mV

= 3V, V

= 300mV to 2.7V, R

= 10k ●200 1000 V/mV

CMRR Common Mode Rejection Ratio V

= 5V, V

= V

–

+ 0.2V to V

– 0.1V ●67 81 dB

= 3V, V

= V

–

+ 0.2V to V

– 0.1V ●61 77 dB

CMRR Match (Channel-to-Channel) (Note 5) V

= 5V, V

= V

–

+ 0.2V to V

– 0.1V ●62 78 dB

= 3V, V

= V

–

+ 0.2V to V

– 0.1V ●57 73 dB

PSRR Power Supply Rejection Ratio V

= 3V to 12V, V

= V

= 0.5V ●81 94 dB

PSRR Match (Channel-to-Channel) (Note 5) V

= 3V to 12V, V

= V

= 0.5V ●77 95 dB

0°C < TA < 70°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.

LT1632/LT1633

sn1632 16323fs

ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage V

= V

– 0.1V ●700 2400 µV

= V

–

+ 0.2V ●700 2400 µV

TC Input Offset Voltage Drift (Note 3) ●815µV/°C

= V

– 0.1V ●2.5 7 µV/°C

∆V

Input Offset Voltage Shift V

= V

–

+ 0.2V to V

– 0.1V ●475 2500 µV

Input Offset Voltage Match (Channel-to-Channel) V

= V

–

+ 0.2V, V

(Note 5) ●750 4000 µV

Input Bias Current V

= V

– 0.1V ●0 1.46 3.0 µA

= V

–

+ 0.2V ●–3.0 –1.46 0 µA

∆I

Input Bias Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●2.92 6.0 µA

Input Bias Current Match (Channel-to-Channel) V

= V

– 0.1V (Note 5) ●70 1160 nA

= V

–

+ 0.2V (Note 5) ●70 1160 nA

Input Offset Current V

= V

– 0.1V ●75 580 nA

= V

–

+ 0.2V ●75 580 nA

∆I

Input Offset Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●50 1160 nA

VOL

Large-Signal Voltage Gain V

= 5V, V

= 300mV to 4.7V, R

= 10k ●250 1000 V/mV

= 3V, V

= 300mV to 2.7V, R

= 10k ●200 800 V/mV

CMRR Common Mode Rejection Ratio V

= 5V, V

= V

–

+ 0.2V to V

– 0.1V ●65 80 dB

= 3V, V

= V

–

+ 0.2V to V

– 0.1V ●60 75 dB

CMRR Match (Channel-to-Channel) (Note 5) V

= 5V, V

= V

–

+ 0.2V to V

– 0.1V ●62 78 dB

= 3V, V

= V

–

+ 0.2V to V

– 0.1V ●57 73 dB

PSRR Power Supply Rejection Ratio V

= 3V to 12V, V

= V

= 0.5V ●79 95 dB

PSRR Match (Channel-to-Channel) (Note 5) V

= 3V to 12V, V

= V

= 0.5V ●75 95 dB

Minimum Supply Voltage (Note 9) V

= V

= 0.5V ●2.6 2.7 V

Output Voltage Swing Low (Note 6) No Load ●19 40 mV

SINK

= 0.5mA ●39 80 mV

SINK

= 25mA, V

= 5V ●730 1500 mV

SINK

= 20mV, V

= 3V ●580 1200 mV

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Minimum Supply Voltage (Note 9) V

= V

= 0.5V ●2.6 2.7 V

Output Voltage Swing Low (Note 6) No Load ●18 40 mV

SINK

= 0.5mA ●37 80 mV

SINK

= 25mA, V

= 5V ●700 1400 mV

SINK

= 20mA, V

= 3V ●560 1200 mV

Output Voltage Swing High (Note 6) No Load ●16 40 mV

SOURCE

= 0.5mA ●50 100 mV

SOURCE

= 15mA, V

= 5V ●820 1600 mV

SOURCE

= 10mA, V

= 3V ●550 1100 mV

Short-Circuit Current V

= 5V ●±18 ±37 mA

= 3V ●±13 ±26 mA

Supply Current per Amplifier ●4.9 6.0 mA

GBW Gain-Bandwidth Product (Note 7) f = 100kHz ●20 41 MHz

SR Slew Rate (Note 8) V

= 5V, A

= –1, R

= Open, V

= 4V ●13 26 V/µs

= 3V, A

= –1, R

= Open ●10 21 V/µs

–40°C < TA < 85°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)

0°C < TA < 70°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.

LT1632/LT1633

sn1632 16323fs

ELECTRICAL CHARACTERISTICS

–40°C < TA < 85°C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted. (Note 4)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage V

= V

500 2200 µV

= V

–

500 2200 µV

∆V

Input Offset Voltage Shift V

= V

–

to V

360 2200 µV

Input Offset Voltage Match (Channel-to-Channel) V

= V

–

, V

(Note 5) 700 3500 µV

Input Bias Current V

= V

0 1.15 2.2 µA

= V

–

–2.2 –1.15 0 µA

∆I

Input Bias Current Shift V

= V

–

to V

2.3 4.4 µA

Input Bias Current Match (Channel-to-Channel) V

= V

(Note 5) 50 880 nA

= V

–

(Note 5) 50 880 nA

Input Offset Current V

= V

50 440 nA

= V

–

50 440 nA

∆I

Input Offset Current Shift V

= V

–

to V

36 880 nA

Input Noise Voltage 0.1Hz to 10Hz 400 nV

P-P

Input Noise Voltage Density f = 1kHz 12 nV/√Hz

Input Noise Current Density f = 1kHz 1.6 pA/√Hz

Input Capacitance f = 100kHz 3 pF

VOL

Large-Signal Voltage Gain V

= –14.5V to 14.5V, R

= 10k 800 5000 V/mV

= –10V to 10V, R

= 2k 400 2500 V/mV

Channel Separation V

= –10V to 10V, R

= 2k 110 127 dB

CMRR Common Mode Rejection Ratio V

= V

–

to V

82 98 dB

CMRR Match (Channel-to-Channel) (Note 5) V

= V

–

to V

80 101 dB

PSRR Power Supply Rejection Ratio V

= ±5V to ±15V 82 96 dB

PSRR Match (Channel-to-Channel) (Note 5) V

= ±5V to ±15V 80 101 dB

Output Voltage Swing Low (Note 6) No Load 16 35 mV

SINK

= 5mA 150 300 mV

SINK

= 25mA 600 1200 mV

Output Voltage Swing High (Note 6) No Load 16 40 mV

SOURCE

= 5mA 250 500 mV

SOURCE

= 25mA 1200 2400 mV

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Output Voltage Swing High (Note 6) No Load ●16 40 mV

SOURCE

= 0.5mA ●55 110 mV

SOURCE

= 15mA, V

= 5V ●860 1700 mV

SOURCE

= 10mA, V

= 3V ●580 1200 mV

Short-Circuit Current V

= 5V ●±17 ±36 mA

= 3V ●±12 ±24 mA

Supply Current per Amplifier ●4.95 6.2 mA

GBW Gain-Bandwidth Product (Note 7) f = 100kHz ●20 40 MHz

SR Slew Rate (Note 8) V

= 5V, A

= –1, R

= Open, V

= 4V ●11 22 V/µs

= 3V, A

= –1, R

= Open ●918 V/µs

TA = 25°C, VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted.

LT1632/LT1633

sn1632 16323fs

ELECTRICAL CHARACTERISTICS

TA = 25°C, VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Short-Circuit Current ±35 ±70 mA

Supply Current per Amplifier 4.6 6 mA

GBW Gain-Bandwidth Product (Note 7) f = 100kHz 22 45 MHz

SR Slew Rate A

= –1, R

= Open, V

= ±10V, 22 45 V/µs

Measure at V

= ±5V

Settling Time 0.01%, V

STEP

= 10V, A

= 1, R

= 1k 575 ns

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage V

= V

– 0.1V ●800 2750 µV

= V

–

+ 0.2V ●800 2750 µV

TC Input Offset Voltage Drift (Note 3) ●10 17 µV/°C

= V

– 0.1V ●511µV/°C

∆V

Input Offset Voltage Shift V

= V

–

+ 0.2V to V

– 0.1V ●500 2500 µV

Input Offset Voltage Match (Channel-to-Channel) V

= V

–

+ 0.2V, V

– 0.1V (Note 5) ●800 4000 µV

Input Bias Current V

= V

– 0.1V ● 0 1.3 2.6 µA

= V

–

+ 0.2V ●–2.6 –1.3 0 µA

∆I

Input Bias Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●2.6 5.2 µA

Input Bias Current Match (Channel-to-Channel) V

= V

– 0.1V (Note 5) ●70 1040 nA

= V

–

+ 0.2V (Note 5) ●70 1040 nA

Input Offset Current V

= V

– 0.1V ●70 520 nA

= V

–

+ 0.2V ●70 520 nA

∆I

Input Offset Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●140 1040 nA

VOL

Large-Signal Voltage Gain V

= –14.5V to 14.5V, R

= 10k ●600 4000 V/mV

= –10V to 10V, R

= 2k ●300 2000 V/mV

Channel Separation V

= –10V to 10V, R

= 2k ●110 125 dB

CMRR Common Mode Rejection Ratio V

= V

–

+ 0.2V to V

– 0.1V ●81 96 dB

CMRR Match (Channel-to-Channel)

(Note 5) V

= V

–

+ 0.2V to V

– 0.1V ●77 95 dB

PSRR Power Supply Rejection Ratio V

= ±5V to ±15V ●80 94 dB

PSRR Match (Channel-to-Channel) (Note 5) V

= ±5V to ±15V ●74 95 dB

Output Voltage Swing Low (Note 6) No Load ●21 45 mV

SINK

= 5mA ●180 350 mV

SINK

= 25mA ●680 1400 mV

Output Voltage Swing High (Note 6) No Load ●15 40 mV

SOURCE

= 5mA ●300 600 mV

SOURCE

= 25mA ●1400 2800 mV

Short-Circuit Current ●±28 ±57 mA

Supply Current per Amplifier ●5.2 6.9 mA

GBW Gain-Bandwidth Product (Note 7) f = 100kHz ●20 41 MHz

SR Slew Rate A

= –1, R

= Open, V

= ±10V, ●21 43 V/µs

Measured at V

= ±5V

0°C < TA < 70°C, VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted.

LT1632/LT1633

sn1632 16323fs

ELECTRICAL CHARACTERISTICS

–40°C < TA < 85°C, VS = ±15V, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 4)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Offset Voltage V

= V

– 0.1V ●1000 3000 µV

= V

–

+ 0.2V ●1000 3000 µV

TC Input Offset Voltage Drift (Note 3) ●10 17 µV/°C

= V

– 0.1V ●511 µV/°C

∆V

Input Offset Voltage Shift V

= V

–

+ 0.2V to V

– 0.1V ●500 2600 µV

Input Offset Voltage Match (Channel-to-Channel) V

= V

–

+ 0.2V, V

– 0.1V

(Note 5) ●850 4000 µV

Input Bias Current V

= V

– 0.1V ● 0 1.4 2.8 µA

= V

–

+ 0.2V ●–2.8 –1.4 0 µA

∆I

Input Bias Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●2.8 5.6 µA

Input Bias Current Match (Channel-to-Channel) V

= V

– 0.1V (Note 5) ● 75 1120 nA

= V

–

+ 0.2V (Note 5) ●75 1120 nA

Input Offset Current V

= V

– 0.1V ●60 560 nA

= V

–

+ 0.2V ●60 560 nA

∆I

Input Offset Current Shift V

= V

–

+ 0.2V to V

– 0.1V ●120 1120 nA

VOL

Large-Signal Voltage Gain V

= –14.5V to 14.5V, R

= 10k ●500 5000 V/mV

= –10V to 10V, R

= 2k ●250 1800 V/mV

Channel Separation V

= –10V to 10V, R

= 2k ●110 124 dB

CMRR Common Mode Rejection Ratio V

= V

–

+ 0.2V to V

– 0.1V ●81 96 dB

CMRR Match (Channel-to-Channel)

(Note 5) V

= V

–

+ 0.2V to V

– 0.1V ●77 95 dB

PSRR Power Supply Rejection Ratio V

= ±5V to ±15V ●80 93 dB

PSRR Match (Channel-to-Channel) (Note 5) V

= ±5V to ±15V ●74 95 dB

Output Voltage Swing Low (Note 6) No Load ●23 50 mV

SINK

= 5mA ●187 350 mV

SINK

= 25mA ●700 1400 mV

Output Voltage Swing High (Note 6) No Load ●16 40 mV

SOURCE

= 5mA ●300 600 mV

SOURCE

= 25mA ●1500 3000 mV

Short-Circuit Current ●±27 ±54 mA

Supply Current per Amplifier ●5.3 7 mA

GBW Gain-Bandwidth Product (Note 7) f = 100kHz ●20 40 MHz

SR Slew Rate A

= –1, R

= Open, V

= ±10V, ●18 35 V/µs

Measure at V

= ±5V

Note 5: Matching parameters are the difference between amplifiers A and

D and between B and C on the LT1633; between the two amplifiers on the

LT1632.

Note 6: Output voltage swings are measured between the output and

power supply rails.

Note 7: V

= 3V, V

= ±15V GBW limit guaranteed by correlation to

5V tests.

Note 8: V

= 3V, V

= 5V slew rate limit guaranteed by correlation to

±15V tests.

Note 9: Minimum supply voltage is guaranteed by testing the change of

to be less than 250µV when the supply voltage is varied from 3V to

2.7V.

The ● denotes specifications that apply over the full operating temperature

range.

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: A heat sink may be required to keep the junction temperature

below the absolute maximum rating when the output is shorted

indefinitely.

Note 3: This parameter is not 100% tested.

Note 4: The LT1632C/LT1633C are guaranteed to meet specified

performance from 0°C to 70°C and are designed, characterized and

expected to meet these extended temperature limits, but are not tested at

–40°C and 85°C. Guaranteed I grade parts are available, consult factory.

NPN ACTIVE NP ACTH/E TA = um \\ v5=5v av 1A = ‘25"0 TA = um TA TA = 755"

LT1632/LT1633

sn1632 16323fs

TYPICAL PERFORMANCE CHARACTERISTICS

Supply Current vs Supply Voltage

TOTAL SUPPLY VOTAGE (V)

SUPPLY CURRENT PER AMPLIFIER (mA)

1630/31 G01

812

16 20 24 28 32

6.0

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

= 125°C

= –55°C

= 25°C

TEMPERATURE (°C)

–50

INPUT BIAS CURRENT (µA)

2.8

2.0

1.2

0.4

–0.4

–1.2

–2.0

–2.8 70

1632/33 G04

–20 10 40

–35 85

–5 25 55 100

= 5V, 0V

= 0V

= ±15V

= 15V

NPN ACTIVE

PNP ACTIVE

= ±15V

= –15V

= 5V, 0V

= 5V

TEMPERATURE (°C)

–75

SUPPLY CURRENT PER AMPLIFIER (mA)

1632/33 G02

–50 –25 25

6.0

5.5

5.0

4.5

4.0

3.5

3.0

2.5 50 75 125100

= ±15V

= 5V, 0V

Supply Current vs Temperature

Input Bias Current vs Temperature

LOAD CURRENT (mA)

SATURATION VOLTAGE (V)

0.01 1 10 100

1632/33 G05

0.1

0.01

VS = 5V, 0V

TA = –55°C

TA = 125°C

TA = 25°C

Output Saturation Voltage vs Load

Current (Output Low)

LOAD CURRENT (mA)

SATURATION VOLTAGE (V)

0.01 1 10 100

1632/33 G06

0.1

0.01

VS = 5V, 0V

TA = –55°C

TA = 125°C

TA = 25°C

Output Saturation Voltage vs Load

Current (Output High)

COMMON MODE VOLTAGE (V)

–2

INPUT BIAS CURRENT (µA)

23456

1632/33 G03

–1 01

2.0

1.5

1.0

0.5

–0.5

–1.0

–1.5

–2.0

= 125°C

= –55°C

= 25°C

= 5V, 0V

Input Bias Current vs

Common Mode Voltage

VOS Distribution, VCM = 0V

(PNP Stage) VOS Distribution, VCM = 5V

(NPN Stage)

INPUT OFFSET VOLTAGE (µV)

–1250

PERCENT OF UNITS (%)

0750

1632/33 G31

–750 –250 250 1250

= 5V, 0V

= 0V

INPUT OFFSET VOLTAGE (µV)

–1250

PERCENT OF UNITS (%)

0750

1632/33 G32

–750 –250 250 1250

= 5V, 0V

= 5V

INPUT OFFSET VOLTAGE (µV)

–1250

PERCENT OF UNITS (%)

0750

1632/33 G33

–750 –250 250 1250

= 5V, 0V

∆VOS Shift for VCM = 0V to 5V

VDM = a 25 NPN AC'HV VDM = 2 5v

LT1632/LT1633

sn1632 16323fs

TYPICAL PERFORMANCE CHARACTERISTICS

TOTAL SUPPLY VOLTAGE (V)

CHANGE IN OFFSET VOLTAGE (µV)

100

200

300

400

2345

1632/33 G07

500

600

= 125°C T

= –55°C

= 25°C

FREQUENCY (Hz)

NOISE VOLTAGE (nV/√Hz)

10 100 1000

11632/33 G09

VS = 5V, 0V

VCM = 2.5V

PNP ACTIVE

VCM = 4.25V

NPN ACTIVE

Noise Voltage SpectrumMinimum Supply Voltage

0.1Hz to 10Hz

Output Voltage Noise Gain Bandwidth and Phase

Margin vs Supply Voltage

TOTAL SUPPLY VOLTAGE (V)

GAIN BANDWIDTH (MHz)

PHASE MARGIN (DEG)

510 15 20

1632/33 G14

120

105

PHASE MARGIN

= V

GAIN BANDWIDTH

Gain and Phase vs Frequency

FREQUENCY (Hz)

COMMON MODE REJECTION RATIO (dB)

100

120

110

1k 100k 1M 10M

1632/33 G12

20 10k

= ±15V

= 5V, 0V

CMRR vs Frequency PSRR vs Frequency

FREQUENCY (Hz)

POWER SUPPLY REJECTION RATIO (dB)

100

01k 100k 1M 10M

1632/33 G13

10k

= ±15V

POSITIVE SUPPLY

NEGATIVE SUPPLY

Channel Separation vs Frequency

FREQUENCY (Hz)

CHANNEL SEPARATION (dB)

100 1k 10k 100k 1M

1632/33 G15

–40

–50

–60

–70

–80

–90

–100

–110

–120

–130

–140

= ±15V

OUT

= ±10V

P-P

= 2k

Noise Current Spectrum

FREQUENCY (Hz)

CURRENT NOISE (pA/√Hz)

10 100 1000

1632/33 G10

VS = 5V, 0V

VCM = 2.5V

PNP ACTIVE

VCM = 4.25V

NPN ACTIVE

FREQUENCY (MHz)

VOLTAGE GAIN (dB)

PHASE SHIFT (DEG)

–10

–20

225

180

135

–45

–90

–135

–180

–225

0.01 1 10 100

1632/33 G11

0.1

PHASE

GAIN

= 1k

= 3V, 0V

= ±15V

TIME (1SEC/DIV)

OUTPUT VOLTAGE (200nV/DIV)

1632/33 G08

= 5V, 0V

= V

\ w w W: sum 0F v5 / ,AV RISWG EDGE \\ FALLING EDGE Na PACKAG v: = :mv LTweaa

LT1632/LT1633

sn1632 16323fs

TYPICAL PERFORMANCE CHARACTERISTICS

Output Step vs

Settling Time to 0.01%

SETTLING TIME (µs)

0 0.25

–10

OUTPUT STEP (V)

–8

–4

–2

0.50 0.75 1.00

1632/33 G18

–6

= ±15V

NONINVERTING INVERTING

INVERTING

NONINVERTING

CAPACITIVE LOAD (pF)

OVERSHOOT (%)

10 100 1000

1632/33 G16

VS = 5V, 0V

AV = 1

RL = 1k

Capacitive Load Handling

OUTPUT VOLTAGE (V)

–5 –4 –3 –2 –1

INPUT VOLTAGE (µV)

200

150

100

–50

–100

–150

–200 3

1632/33 G21

10246

= ±15V

= 100Ω

OUTPUT VOLTAGE (V)

INPUT VOLTAGE (µV)

1632/33 G20

12 4

–5

–10

–15

–20 6

= 5V, 0V

= 1k

= 10k

Open-Loop Gain Open-Loop Gain Open-Loop Gain

OUTPUT VOLTAGE (V)

–20 –15

INPUT VOLTAGE (µV)

1632/33 G19

–10

–20 –10 –5 05

10 15

–5

–15

15 V

= ±15V

= 1k

= 10k

TIME AFTER POWER-UP (SEC)

CHANGE IN OFFSET VOLTAGE (µV)

100

–100

–200

–300

–400

–500 60 100 160

1632/33 G22

20 40 80 120 140

N8 PACKAGE, V

= 5V, 0V

S8 PACKAGE, V

= 5V, 0V

N8 PACKAGE, V

= ±15V

LT1633CS, V

= 5V, 0V

S8 PACKAGE, V

= ±15V

LT1633CS, V

= ±15V

FREQUENCY (kHz)

THD + NOISE (%)

0.1

0.01

0.001

0.00010.1 10 100

1632/33 G23

= 3V, 0V

= 1

= 2V

P-P

= 10k

= 5V, 0V

= 1

= 5V, 0V AND 3V, 0V

= –1

Total Harmonic Distortion + Noise

vs Frequency

TOTAL SUPPLY VOLTAGE (V)

SLEW RATE (V/µs)

812 20 2832416

24 36

1632/33 G17

RISING EDGE

FALLING EDGE

OUT

= 80% OF V

= –1

Slew Rate vs Supply Voltage

FREQUENCY (kHz)

OUTPUT VOLTAGE SWING (V

P-P

)

10 100 1000

1630/31 G24

= –1

= 5V, 0V

= 1

Maximum Undistorted Output

Signal vs FrequencyWarm-Up Drift vs Time

LT1632/LT1633

sn1632 16323fs

TYPICAL PERFORMANCE CHARACTERISTICS

5V Large-Signal Response

1632/33 G26

= 5V, 0V

= 1

= 1k

5V Small-Signal Response

163233 G25

= 5V, 0V

= 1

= 1k

Harmonic Distortion vs Frequency

FREQUENCY (kHz)

100

HARMONIC DISTORTION (dBc)

–20

–40

–60

–80

–100 1000 2000

1632/33 G29

200 500

= 5V, 0V

= 1

= 2V

P-P

= 150Ω

= 1k

2ND

3RD

2ND

3RD

Harmonic Distortion vs Frequency ±15V Large-Signal Response

1632/33 G27

= ±15V

= 1

= 1k

±15V Small-Signal Response

FREQUENCY (kHz)

100

HARMONIC DISTORTION (dBc)

–20

–40

–60

–80

–100 1000 2000

1632/33 G30

1000

200 500

2ND

3RD

= 5V, 0V

= –1

= 2V

P-P

= 150Ω

= 1k

2ND

1632/33 G28

= ±15V

= 1

= 1k

APPLICATIONS INFORMATION

WUUU

Rail-to-Rail Input and Output

The LT1632/LT1633 are fully functional for an input and

output signal range from the negative supply to the posi-

tive supply. Figure 1 shows a simplified schematic of the

amplifier. The input stage consists of two differential

amplifiers, a PNP stage Q1/Q2 and an NPN stage Q3/Q4

that are active over different ranges of input common

mode voltage. The PNP differential input pair is active for

input common mode voltages V

between the negative

supply to approximately 1.5V below the positive supply.

As V

moves closer toward the positive supply, the

transistor Q5 will steer the tail current I

to the current

mirror Q6/Q7, activating the NPN differential pair and the

PNP pair becomes inactive for the rest of the input com-

mon mode range up to the positive supply.

The output is configured with a pair of complementary

common emitter stages Q14/Q15 that enables the output

to swing from rail to rail. These devices are fabricated on

Linear Technology’s proprietary complementary bipolar

process to ensure similar DC and AC characteristics.

Capacitors C1 and C2 form local feedback loops that lower

the output impedance at high frequencies.

Power Dissipation

The LT1632/LT1633 amplifiers combine high speed and

large output current drive in a small package. Because the

_.I._ F PK. FT 4 + I_ 12, V L2,) +® ﬁmf 0% NW: rk u} E. o« mWNU \MI. E v D IIIII IvTvT

LT1632/LT1633

sn1632 16323fs

APPLICATIONS INFORMATION

WUUU

amplifiers operate over a very wide supply range, it is

possible to exceed the maximum junction temperature of

150°C in plastic packages under certain conditions. Junc-

tion temperature T

is calculated from the ambient tem-

perature T

and power dissipation P

as follows:

LT1632CN8: T

= T

+ (P

• 130°C/W)

LT1632CS8: T

= T

+ (P

• 190°C/W)

LT1633CS: T

= T

+ (P

• 150°C/W)

The power dissipation in the IC is the function of the supply

voltage, output voltage and load resistance. For a given

supply voltage, the worst-case power dissipation P

DMAX

occurs at the maximum supply current and when the

output voltage is at half of either supply voltage (or the

maximum swing if less than 1/2 supply voltage). There-

fore P

DMAX

is given by:

DMAX

= (V

• I

SMAX

) + (V

/2)

To ensure that the LT1632/LT1633 are used properly,

calculate the worst-case power dissipation, use the ther-

mal resistance for a chosen package and its maximum

junction temperature to derive the maximum ambient

temperature.

Example: An LT1632CS8 operating on ±15V supplies and

driving a 500Ω, the worst-case power dissipation per

amplifier is given by:

DMAX

= (30V • 5.6mA) + (15V – 7.5V)(7.5/500)

= 0.168 + 0.113 = 0.281W

If both amplifiers are loaded simultaneously, then the total

power dissipation is 0.562W. The SO-8 package has a

junction-to-ambient thermal resistance of 190°C/W in still

air. Therefore, the maximum ambient temperature that the

part is allowed to operate is:

= T

– (P

DMAX

• 190°C/W)

= 150°C – (0.562W • 190°C/W) = 43°C

For a higher operating temperature, lower the supply

voltage or use the DIP package part.

Input Offset Voltage

The offset voltage changes depending upon which input

stage is active, and the maximum offset voltages are

trimmed to less than 1350µV. To maintain the precision

characteristics of the amplifier, the change of V

over the

entire input common mode range (CMRR) is guaranteed

to be less than 1500µV on a single 5V supply.

Input Bias Current

The input bias current polarity depends on the input

common mode voltage. When the PNP differential pair is

active, the input bias currents flow out of the input pins.

BIAS

D7D5

+IN

–IN OUT

–

D8D6

Q12

Q14

1632/33 F01

225Ω

–

R4 R5

Q11 Q13 Q15

BUFFER

AND

OUTPUT BIAS

Figure 1. LT1632 Simplified Schematic Diagram

LT1632/LT1633

sn1632 16323fs

APPLICATIONS INFORMATION

WUUU

They flow in the opposite direction when the NPN input

stage is active. The offset voltage error due to input bias

currents can be minimized by equalizing the noninverting

and inverting input source impedance.

Output

The outputs of the LT1632/LT1633 can deliver large load

currents; the short-circuit current limit is 70mA. Take care

to keep the junction temperature of the IC below the

absolute maximum rating of 150°C (refer to the Power

Dissipation section). The output of these amplifiers have

reverse-biased diodes to each supply. If the output is

forced beyond either supply, unlimited current will flow

through these diodes. If the current is transient and limited

to several hundred mA, no damage to the part will occur.

Overdrive Protection

To prevent the output from reversing polarity when the

input voltage exceeds the power supplies, two pairs of

crossing diodes D1 to D4 are employed. When the input

voltage exceeds either power supply by approximately

700mV, D1/D2 or D3/D4 will turn on, forcing the output to

the proper polarity. For this phase reversal protection to

work properly, the input current must be limited to less

than 5mA.

If the amplifier is to be severely overdriven, an

external resistor should be used to limit the overdrive

current.

The LT1632/LT1633’s input stages are also protected

against large differential input voltages by a pair of back-

to-back diodes D5/D8. When a differential voltage of

more than 1.4V is applied to the inputs, these diodes will

turn on, preventing the emitter-base breakdown of the

input transistors. The current in D5/D8 should be limited

to less than 10mA. Internal 225Ω resistors R6 and R7 will

limit the input current for differential input signals of 4.5V

or less. For larger input levels, a resistor in series with

either or both inputs should be used to limit the current.

Worst-case differential input voltage usually occurs when

the output is shorted to ground. In addition, the amplifier

is protected against ESD strikes up to 3kV on all pins.

Capacitive Load

The LT1632/LT1633 are wideband amplifiers that can

drive capacitive loads up to 200pF on ±15V supplies in a

unity-gain configuration. On a 3V supply, the capacitive

load should be kept to less than 100pF. When there is a

need to drive larger capacitive loads, a resistor of 20Ω to

50Ω should be connected between the output and the

capacitive load. The feedback should still be taken from the

output so that the resistor isolates the capacitive load to

ensure stability.

Feedback Components

The low input bias currents of the LT1632/LT1633 make it

possible to use the high value feedback resistors to set the

gain. However, care must be taken to ensure that the pole

formed by the feedback resistors and the total capacitance

at the inverting input does not degrade stability. For

instance, the LT1632/LT1633 in a noninverting gain of 2,

set with two 20k resistors, will probably oscillate with

10pF total input capacitance (5pF input capacitance and

5pF board capacitance). The amplifier has a 6MHz cross-

ing frequency and a 55° phase margin at 6dB of gain. The

feedback resistors and the total input capacitance form a

pole at 1.6MHz that induces a phase shift of 75° at 5MHz!

The solution is simple: either lower the value of the

resistors or add a feedback capacitor of 10pF or more.

TYPICAL APPLICATIONS

Single Supply, 40dB Gain, 550kHz Instrumentation

Amplifier

An instrumentation amplifier with a rail-to-rail output

swing, operating from a 3V supply can be constructed with

the LT1632 as shown in the first page of this data sheet.

The amplifier has a nominal gain of 100, which can be

adjusted with resistor R5. The DC output level is set by the

difference of the two inputs multiplied by the gain of 100.

The voltage gain and the DC output level can be

expressed as follows:

LT1632/LT1633

sn1632 16323fs

Figure 4. RF Amplifier Control Biasing and DC Restoration

TYPICAL APPLICATIONS

VVVA

OUT IN IN V

=++











=−











+−

312

•

Common mode range can be calculated by the following

equations:

Lower

Upper

RVV

where V

CML OUT

CMH OUT

limit common mode input voltage

is supply voltage.

=







+













=







+−

()













501 10

5015 10

For example, the common mode range is from 0.15V to

2.65V if the output is set at one half of the 3V supply. The

common mode rejection is greater than 110dB at 100Hz

when trimmed with resistor R1. The amplifier has a

bandwidth of 550kHz.

Single Supply, 400kHz, 4th Order Butterworth Filter

The circuit shown in Figure 2 makes use of the low voltage

operation and the wide bandwidth of the LT1632 to create

a 400kHz 4th order lowpass filter with a single supply. The

amplifiers are configured in the inverting mode to mini-

mize common mode induced distortion and the output

can swing rail-to-rail for the maximum dynamic range.

Figure 3 displays the frequency response of the filter.

Stopband attenuation is greater than 85dB at 10MHz.

–

1/2 LT1632

OUT

1632/33 F04

HP-MSA0785

10k

220µH

0.01µF

220µH

2N3906 Q2

2N3906

0.01µF

50Ω

10Ω

453ΩR4

10Ω

1500pF

–

1/2 LT1632

1500pF

0.01µF

3.9µH

RF1 RF2

Figure 2. Single Supply, 400kHz, 4th Order Butterworth Filter

FREQUENCY (Hz)

0.1k

GAIN (dB)

1k 10k 100k 1M 10M

1632/33 F03

–10

–20

–30

–40

–50

–60

–70

–80

–90

= 3V, 0V

= 2.5V

P-P

Figure 3. Frequency Response

–

1/2 LT1632

2.32k

OUT

1632/33 F02

220pF

2.32k 6.65k

–

1/2 LT1632

2.74k 22pF

470pF

5.62k

2.74k

47pF

With a 2.25V

P-P

, 100kHz input signal on a 3V supply, the

filter has harmonic distortion of less than –87dBc.

RF Amplifier Control Biasing and DC Restoration

Taking advantage of the rail-to-rail input and output, and

the large output current capability of the LT1632, the

circuit shown in Figure 4 provides precise bias current for

the RF amplifiers and restores the DC output level. To

ensure optimum performance of an RF amplifier, its bias

point must be accurate and stable over the operating

ﬂy—H—‘m H L ii7 L1 L1 L1 Li H H H H g7? mg L 7 7%LHi7 7 i if ‘ H H H H H H H w W 7 L L Li LJHLi l ”Tatum

LT1632/LT1633

sn1632 16323fs

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

S Package

14-Lead Plastic Small Outline (Narrow 0.150)

(LTC DWG # 05-08-1610)

temperature range. The op amp A1 combined with Q1, Q2,

R1, R2 and R3 establishes two current sources of 21.5mA

to bias RF1 and RF2 amplifiers. The current of Q1, is

determined by the voltage across R2 over R1, which is

then replicated in Q2. These current sources are stable and

precise over temperature and have a low dissipated power

due to a low voltage drop between their terminals. The

amplifier A2 is used to restore the DC level at the output.

With a large output current of the LT1632, the output can

be set at 1.5V DC on 5V supply and 50Ω load. This circuit

has a –3dB bandwidth from 2MHz to 2GHz and a power

gain of 25dB.

TYPICAL APPLICATIONS

0.016 – 0.050

0.406 – 1.270

0.010 – 0.020

(0.254 – 0.508)× 45°

0° – 8° TYP

0.008 – 0.010

(0.203 – 0.254)

S14 0695

1234

0.150 – 0.157**

(3.810 – 3.988)

14 13

0.337 – 0.344*

(8.560 – 8.738)

0.228 – 0.244

(5.791 – 6.197)

12 11 10 9

567

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

0.004 – 0.010

(0.101 – 0.254)

0.050

(1.270)

TYP

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

PACKAGE DESCRIPTION

Dimensions in inches (millimeters) unless otherwise noted.

N8 Package

8-Lead PDIP (Narrow 0.300)

(LTC DWG # 05-08-1510)

N8 1197

0.009 – 0.015

(0.229 – 0.381)

0.300 – 0.325

(7.620 – 8.255)

0.325 +0.035

–0.015

+0.889

–0.381

8.255

()

0.100 ± 0.010

(2.540 ± 0.254)

0.065

(1.651)

TYP

0.045 – 0.065

(1.143 – 1.651)

0.130 ± 0.005

(3.302 ± 0.127)

0.020

(0.508)

MIN

0.018 ± 0.003

(0.457 ± 0.076)

0.125

(3.175)

MIN 12 34

8765

0.255 ± 0.015*

(6.477 ± 0.381)

0.400*

(10.160)

MAX

*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.

MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)

S8 Package

8-Lead Plastic Small Outline (Narrow 0.150)

(LTC DWG # 05-08-1610)

SO8 0996

0.016 – 0.050

0.406 – 1.270

0.010 – 0.020

(0.254 – 0.508)× 45°

0°– 8° TYP

0.008 – 0.010

(0.203 – 0.254)

0.053 – 0.069

(1.346 – 1.752)

0.014 – 0.019

(0.355 – 0.483)

0.004 – 0.010

(0.101 – 0.254)

0.050

(1.270)

TYP

1234

0.150 – 0.157**

(3.810 – 3.988)

8765

0.189 – 0.197*

(4.801 – 5.004)

0.228 – 0.244

(5.791 – 6.197)

DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH

SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD

FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

+UTF> § T 7 L7LELFL%

LT1632/LT1633

sn1632 16323fs

LT/TP 0998 4K • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 1998

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900

●

FAX: (408) 434-0507

●

www.linear-tech.com

TYPICAL APPLICATION

–

1/2 LT1632

OUT

1632/33 F05

R11

10k

R10

10k

500Ω

1.62k

1000pF

–

1/2 LT1632

4.7µF

2.2µF

Figure 5. Tunable Q Notch Filter

PART NUMBER DESCRIPTON COMMENTS

LT1211/LT1212 Dual/Quad 14MHz, 7V/µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 275µV V

OS(MAX)

6µV/°C Max Drift, Max Supply Current 1.8mA per Op Amp

LT1213/LT1214 Dual/Quad 28MHz, 12V/µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 275µV V

OS(MAX)

6µV/°C Max Drift, Max Supply Current 3.5mA per Op Amp

LT1215/LT1216 Dual/Quad 23MHz, 50V/µs, Single Supply Precision Op Amps Input Common Mode Includes Ground, 450µV V

OS(MAX)

6µV/°C Max Drift, Max Supply Current 6.6mA per Op Amp

LT1498/LT1499 Dual/Quad 10MHz, 6V/µs Rail-to-Rail Input and Output High DC Accuracy, 475µV V

OS(MAX)

, 4µV/°C Max Drift,

C-LoadTM Op Amps Max Supply Current 2.2mA per Amp

LT1630/LT1631 Dual/Quad 30MHz, 10V/µs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 525µV V

OS(MAX)

, 70mA Output Current,

Max Supply Current 4.4mA per Amp

C-Load is a trademark of Linear Technology Corporation.

RELATED PARTS

fRC

CpF

RR V

ODC

=+=

162

1000

511

11 10 25

()

Tunable Q Notch Filter

A single supply, tunable Q notch filter as shown in Figure

5 is built with LT1632 to maximize the output swing. The

filter has a gain of 2, and the notch frequency (f

) is set by

the values of R and C. The resistors R10 and R11 set up the

DC level at the output. The Q factor can be adjusted by

varying the value of R8. The higher value of R8 will

decrease Q as depicted in Figure 6, because the output

induces less of feedback to amplifier A2. The value of R7

should be equal or greater than R9 to prevent oscillation.

If R8 is a short and R9 is larger than R7, then the positive

feedback from the output will create phase inversion at the

output of amplifier A2, which will lead to oscillation.

FREQUENCY (kHz)

–20

–40

GAIN (V

OUT

)(dB)

13632/33 F06

0 20 40 60 140 160 180 20080 100 120

INCREASING R8

DECREASING R8

Figure 6. Frequency Response

Fiche technique pour LT1632, LT1633 de Analog Devices Inc.

INFORMATIONS

AIDE

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