LT1169

PRODUCTION

Dual Low Noise, Picoampere Bias Current, JFET Input Op Amp

Data Sheet Product Selection Table
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Overview

  • Input Bias Current, Warmed Up: 20pA Max
  • 100% Tested Low Voltage Noise: 8nV/√Hz Max
  • S8 and N8 Package Standard Pinout
  • Very Low Input Capacitance: 1.5pF
  • Voltage Gain: 1.2 Million Min
  • Offset Voltage: 2mV Max
  • Input Resistance: 1013Ω
  • Gain-Bandwidth Product: 5.3MHz Typ
  • Guaranteed Specifications with ±5V Supplies
  • Guaranteed Matching Specifications

The LT1169 achieves a new standard of excellence in noise performance for a dual JFET op amp. For the first time low voltage noise (6nV/√Hz) is simultaneously offered with extremely low current noise (1fA/√Hz), providing the lowest total noise for high impedance transducer applications. Unlike most JFET op amps, the very low input bias current (5pA Typ) is maintained over the entire common mode range which results in an extremely high input resistance (1013Ω). When combined with a very low input capacitance (1.5pF) an extremely high input impedance results, making the LT1169 the first choice for amplifying low level signals from high impedance transducers. The low input capacitance also assures high gain linearity when buffering AC signals from high impedance transducers.

The LT1169 is unconditionally stable for gains of 1 or more, even with 1000pF capacitive loads. Other key features are 0.6mV VOS and a voltage gain over 4 million. Each individual amplifier is 100% tested for voltage noise, slew rate (4.2V/µs), and gain-bandwidth product (5.3MHz).

The LT1169 is offered in the S8 and N8 packages.

A full set of matching specifications are provided for precision instrumentation amplifier front ends. Specifications at ±5V supply operation are also provided. For an even lower voltage noise please see the LT1113 data sheet.

Applications

  • Photocurrent Amplifiers
  • Hydrophone Amplifiers
  • High Sensitivity Piezoelectric Accelerometers
  • Low Voltage and Current Noise Instrumentation Amplifier Front Ends
  • Two and Three Op Amp Instrumentation Amplifiers
  • Active Filters
LT1169
Dual Low Noise, Picoampere Bias Current, JFET Input Op Amp
Low Noise Light Sensor with DC Servo 1kHz Output Voltage Noise Density vs Source Resistance Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 3

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LT1169
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