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