GENERAL DESCRIPTION
The ADA4001-2 is a dual channel JFET amplifier that features low input voltage noise and current noise, input bias current, and rail-to-rail output.
The combination of low noise and low input bias current makes this amplifier especially suitable for high impedance sensor amplification. With low noise and fast settling times, the ADA4001-2 provides good accuracy for medical instruments, electronic measurement, and automated test equipment. Unlike many competitive amplifiers, the ADA4001-2 maintains fast settling performance even with substantial capacitive loads, and, unlike many older JFET amplifiers, the ADA4001-2 does not suffer from output phase reversal when input voltages exceed the maximum common-mode voltage range.

FEATURES
   Low TCVOS: ±5 µV/°C typical
   Low input bias current: 20 pA typical at VSY = ±15 V
   Low noise
      7.7 nV/√Hz typical at f = 1 kHz
      1.2 µV rms at 20 Hz to 20 kHz
   Low distortion: 0.00006%
   No phase reversal
   Rail-to-rail output
   Unity-gain stable

APPLICATIONS
   Instrumentation
   Medical instruments
   Multipole filters
   Precision current measurement
   Photodiode amplifiers
   Sensors
   Audio