GENERAL DESCRIPTION

The AD8220 is the first single-supply JFET input instrumentation amplifier available in an MSOP package. Designed to meet the needs of high performance, portable instrumentation, the AD8220 has a minimum common-mode rejection ratio (CMRR) of 86 dB at dc and a minimum CMRR of 80 dB at 5 kHz for G = 1. Maximum input bias current is 10 pA and typically remains below 300 pA over the entire industrial temperature range. Despite the JFET inputs, the AD8220 typically has a noise corner of only 10 Hz.

FEATURES

Low input currents

10 pA maximum input bias current (B grade)

0.6 pA maximum input offset current (B grade)

High CMRR

100 dB CMRR (minimum), G = 10 (B grade)

80 dB CMRR (minimum) to 5 kHz, G = 1 (B grade)

Excellent ac specifications and low power

1.5 MHz bandwidth (G = 1)

14 nV/√Hz input noise (1 kHz)

Slew rate 2 V/μs

750 μA quiescent supply current (maximum) Versatile

MSOP package

Rail-to-rail output

Input voltage range to below negative supply rail

4 kV ESD protection

4.5 V to 36 V single supply

±2.25 V to ±18 V dual supply

Gain set with single resistor (G = 1 to 1000)

APPLICATIONS

Medical instrumentation

Precision data acquisition

Transducer interface