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LT1792

Low Noise, Precision,

JFET Input Op Amp

The LT

noise performance for a JFET op amp. The 4.2nV/

√Hz

voltage noise combined with low current noise and

picoampere bias currents make the LT1792 an ideal choice

for amplifying low level signals from high impedance

capacitive transducers.

The LT1792 is unconditionally stable for gains of 1 or more,

even with load capacitances up to 1000pF. Other key

features are 600

Each individual amplifier is 100% tested for voltage noise,

slew rate and gain bandwidth.

The design of the LT1792 has been optimized to achieve

true precision performance with an industry standard

pinout in the SO-8 package. Specifications are also pro-

vided for

±5V supplies.

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100% Tested Low Voltage Noise: 6nV/

√Hz Max

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A Grade 100% Temperature Tested

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Voltage Gain: 1.2 Million Min

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Offset Voltage Over Temp: 800

µV Max

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Gain-Bandwidth Product: 5.6MHz Typ

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Guaranteed Specifications with

±5V Supplies

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

Low Noise Hydrophone Amplifier with DC Servo

7

4

5V TO 15V

6

2

3

–5V TO –15V

C2

0.47

µF

2

3

6

R8

100M

R6

100k

R4

1M

R5

1M

LT1792

LT1097

R3

3.9k

C1*

R1*

100M

R7

1M

R2

200

Ω

HYDRO-

PHONE

OUTPUT

DC OUTPUT

OUTPUT VOLTAGE NOISE = 128nV/

√Hz AT 1kHz (GAIN = 20)

C1

1792 TA01

INPUT VOLTAGE NOISE (nV/

√Hz)

3.6

40

30

20

10

0

4.0

4.4 4.6

5.6

1792 TA02

3.8

4.2

4.8 5.0 5.2 5.4

270 OP AMPS TESTED

1kHz Input Noise Voltage Distribution

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Photocurrent Amplifiers

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Hydrophone Amplifiers

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High Sensitivity Piezoelectric Accelerometers

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Low Voltage and Current Noise Instrumentation

Amplifier Front Ends

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Two and Three Op Amp Instrumentation Amplifiers

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Active Filters

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO