AD22057

单电源传感器接口放大器 Single-Supply Sensor Interface Amplifier

Product Details

The is a single-supply difference amplifier for the amplification and low-pass filtering of small differential voltages from sources having a large common-mode voltage.

Supply voltages from +3 V to +36 V can be used. The input common-mode range extends from below ground to 24 V using a +5 V supply with excellent rejection of this common-mode voltage.

This range is achieved by the use of a special resitive attenuator at the input, laser trimmed to a very high differential balance. Low initial offset voltage and offset voltage drift are specified, and long-term stability of gain and offset voltage is also provided.

Provisions are included for optional low-pass filtering and gain adjustment. An accurate midscale offset feature allows bipolar signals to be amplified.

### Features and Benefits

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Gain of ×20 Alterable from ×1 to ×160

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Input CMR from Below Ground to 6× VS \- 1 V

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Output Span 20 mV to VS \- 0.2 V

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1-, 2-, 3-Pole Low-Pass Filtering Available

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Accurate Midscale Offset Capability

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Differential Input Resistance 400 kΩ

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Drives 1kΩ Load to +4 V Using VS = +5 V

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Supply Voltage: +3.0 V to +36 V

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Transient Spike Protection and RFI

Filters Included

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Peak Input Voltage 40 ms: 60 V

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Reversed Supply Protection: -34 V

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Operating Temperature Range: -40°C

to +125°C