AD22050

`Gain of 320. Alterable from 31 to 3160
`Input CMR from Below Ground to 63 (VS 1 V)
`Output Span 20 mV to (VS 0.2) V
`1-, 2-, 3-Pole Low-Pass Filtering Available
`Accurate Midscale Offset Capability
`Differential Input Resistance 400 kV
`Drives 1 kV Load to +4 V Using VS = +5 V
`Supply Voltage: +3.0 V to +36 V
`Transient Spike Protection and RFI Filters Included
`Peak Input Voltage (40 ms): 60 V
`Reversed Supply Protection: 34 V
`Operating Temperature Range: 408C to +1258C

The AD22050 is a single-supply difference amplifier for amplifying and low-pass filtering small differential voltages (typically 100 mV FS at a gain of 40) from sources having a large commonmode voltage.

Supply voltages of AD22050 from +3.0 V to +36 V can be used. The input common-mode range extends from below ground to +24 V usinga +5 V supply with excellent rejection of this common-mode voltage. This is achieved by the use of a special resistive attenuator at the input, laser trimmed to a very high differential balance. Provisions are included for optional low-pass filtering and gain adjustment. An accurate midscale offset feature allows bipolar signals to be amplified.