AD8222BCPZ-R7

ANALOG DEVICES  AD8222BCPZ-R7  芯片, 仪器放大器, 1.2MHZ, 140DB, LFCSP-16

Product Details

The AD8222 is a dual-channel, high performance instrumentation amplifier that requires only one external resistor per amplifier to set gains of 1 to 10,000.

The AD8222 is the first dual-instrumentation amplifier in the small 4 mm × 4mm LFCSP. It requires the same board area as a typical single instrumentation amplifier. The smaller package allows a 2× increase in channel density and a lower cost per channel, all with no compromise in performance.

The AD8222 can also be configured as a single-channel, differential output instrumentation amplifier. Differential outputs provide high noise immunity, which can be useful when the output signal must travel through a noisy environment, such as with remote sensors. The configuration can also be used to drive differential input analog-to-digital converters ADCs. The AD8222 maintains a minimum CMRR of 80 dB to 4 kHz for all grades at G = 1. High CMRR over frequency allows the AD8222 to reject wideband interference and line harmonics, greatly simplifying filter requirements. The AD8222 also has a typical CMRR drift over temperature of just 0.07 µV/V/°C at G = 1.

The AD8222 operates on both single and dual supplies and only requires 2.2 mA maximum supply current for both amplifiers. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant.

For a single-channel version, see the AD8221.

Applications

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Multichannel data acquisition for

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ECG and medical instrumentation

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Industrial process controls

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Wheatstone bridge sensors

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Differential drives for

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High resolution input ADCs

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Remote sensors

### Features and Benefits

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Two channels in small 4 mm × 4 mm LFCSP

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Gain set with 1 resistor per amplifier G = 1 to 10,000

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Low noise

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8 nV/√Hz at 1 kHz

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0.25 µV p-p 0.1 Hz to 10 Hz

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High accuracy dc performance B grade

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60 µV maximum input offset voltage

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0.3 µV/°C maximum input offset drift

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1.0 nA maximum input bias current

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126 dB minimum CMRR G = 100

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Excellent ac performance

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140 kHz bandwidth G = 100

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13 µs settling time to 0.001%

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Differential output option single channel

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Fully specified

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Adjustable common-mode output

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Supply range: ±2.3 V to ±18 V