AD8420ARMZ-R7

宽电源电压范围，微功耗， Wide Supply Range, Micropower,

Product Details

The AD8420 is a low cost, micropower, wide supply range, instrumentation amplifier with a rail-to-rail output and a novel architecture that allows for extremely flexible design. It is optimized to amplify small differential voltages in the presence of large common-mode signals.

The AD8420 is based on an indirect current feedback architecture that gives it an excellent input common-mode range. Unlike conventional instrumentation amplifiers, the AD8420 can easily amplify signals at or even slightly below ground without requiring dual supplies. The AD8420 has rail-to-rail output, and the output voltage swing is completely independent of the input common-mode voltage.

Single-supply operation, micropower current consumption, and rail-to-rail output swing make the AD8420 ideal for battery-powered applications. Its rail-to-rail output stage maximizes dynamic range when operating from low supply voltages. Dual-supply operation ±15 V and low power consumption make the AD8420 ideal for a wide variety of applications in medical or industrial instrumentation.

The AD8420 is available in an 8-lead MSOP package. Performance is specified over the full temperature range of −40°C to +85°C, and the part is operational from −40°C to +125°C

**APPLICATIONS**

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Bridge amplifiers

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Pressure Measurement

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Medical instrumentation

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Portable data acquisition

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Multichannel systems

### Features and Benefits

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Maximum supply current:

90 μA

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Minimum CMRR: 100 dB

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Drives heavy capacitive loads:

~700 pF

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Rail-to-rail output

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Input voltage range goes below ground

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Gain set with 2 external resistors

Can achieve low gain drift at any gain

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Very wide power supply range

Single supply: 2.7 V to 36 V

Dual supply: ±2.7 V to ±18 V

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Bandwidth G = 100: 2.5 kHz

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Input voltage noise: 55 nV/√Hz

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See data sheet for additional features