LT1169

The LT1169 achieves a new standard of excellence in noiseperformance for a dual JFET op amp. For the first time lowvoltage noise (6nV/Hz) is simultaneously offered withextremely low current noise (1fA/Hz), providing the low-est 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 moderange which results in an extremely high input resistance(1013Ω). When combined with a very low input capaci-tance (1.5pF) an extremely high input impedance results,making the LT1169 the first choice for amplifying low levelsignals from high impedance transducers. The low inputcapacitance also assures high gain linearity when bufferingAC signals from high impedance transducers.

The LT1169 is unconditionally stable for gains of 1 or more,even with 1000pF capacitive loads. Other key features are0.6mV VOS and a voltage gain over 4 million. Each indi-vidual 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 forprecision instrumentation amplifier front ends.

Specifica-tions at ±5V supply operation are also provided. For aneven lower voltage noise please see the LT1113 data sheet.