ICL7605

The ICL7605 is a kind of CMOS commutating auto-zero (CAZ) instrumentation amplifier. The device is intended to replace most of today's hybrid or monolithic instrumentation amplifiers for low frequency applications from DC to 10 Hz. The amplifier includes two analog sections: a unity gain differential to single-ended voltage converter and a CAZ op amp. The first section senses the differential input and applies it to the CAZ amp section. This section consists of an operational amplifier circuit which continuously corrects itself for input voltage errors, such as input offset voltage, temperature effects, and long term drift. The device is intended for low-frequency operation in applications such as strain gauge amplifiers which require voltage gains from 1 to 1000 and bandwidths from DC to 10 Hz.

There are some features of the ICL7605 as follows: (1)exceptionally low input offset voltage: 2V; (2)low long term input offset voltage drift: 0.2V/year; (3)low input offset voltage temperature coefficient: 0.05V/; (4)wide commone mode input voltage range: 0.3 V above supply rall; (5)high common mode rejection ratio: 100 dB; (6)operates at supply voltages as low as ±2V; (7)short circuit protection on outputs for ±5 V operation; (8)static-protected inputs: no special handling required; (9)compensated.

The following is about the absolute maximum ratings of the ICL7605: (1)total supply voltage (V+ to V-): 18 V; (2)DR input voltage: V+ -8 to V+ +0.3 V; (3)input voltage (C1, C2, C3, C4, +DIFF IN, -DIFF IN, -INPUT, BIAS, OSC): V- -0.3 to V+ +0.3 V; (4)differential input voltage (+DIFF IN to -DIFF IN): V- -0.3 to V+ +0.3 V; (5)duration of output short circuit: umlimited; (6)continuous total power dissipation: 500 mW; (7)operating temperature range: -55 to +125; (8)storage temperature range: -65 to +150; (9)lead temperature (soldering, 10 sec): 300.