AD8222HACPZ-RL

精密，双通道仪表放大器 Precision, Dual-Channel Instrumentation Amplifier

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

.

Multichannel data acquisition for

.

ECG and medical instrumentation

.

Industrial process controls

.

Wheatstone bridge sensors

.

Differential drives for

.

High resolution input ADCs

.

Remote sensors

### Features and Benefits

.

Two channels in small 4 mm × 4 mm LFCSP

.

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

.

Low noise

.

8 nV/√Hz at 1 kHz

.

0.25 µV p-p 0.1 Hz to 10 Hz

.

High accuracy dc performance B grade

.

60 µV maximum input offset voltage

.

0.3 µV/°C maximum input offset drift

.

1.0 nA maximum input bias current

.

126 dB minimum CMRR G = 100

.

Excellent ac performance

.

140 kHz bandwidth G = 100

.

13 µs settling time to 0.001%

.

Differential output option single channel

.

Fully specified

.

Adjustable common-mode output

.

Supply range: ±2.3 V to ±18 V