The AD8222HBCPZ-R7 is a dual-channel, high performance instrumentationamplifier that requires only one external resistor per amplifierto set gains of 1 to 10,000.
The AD8222HBCPZ-R7 is the first dual-instrumentation amplifier in thesmall 4 mm × 4mm LFCSP. It requires the same board area as atypical single instrumentation amplifier. The smaller packageallows a 2× increase in channel density and a lower cost perchannel, all with no compromise in performance.
The AD8222HBCPZ-R7 can also be configured as a single-channel, differentialoutput instrumentation amplifier. Differential outputs providehigh noise immunity, which can be useful when the outputsignal must travel through a noisy environment, such as withremote sensors. The configuration can also be used to drivedifferential input analog-to-digital converters (ADCs). TheAD8222HBCPZ-R7 maintains a minimum CMRR of 80 dB to 4 kHz for allgrades at G = 1. High CMRR over frequency allows the AD8222to reject wideband interference and line harmonics, greatlysimplifying filter requirements. The AD8222HBCPZ-R7 also has a typicalCMRR drift over temperature of just 0.07 µV/V/°C at G = 1.
The AD8222HBCPZ-R7 operates on both single and dual supplies and onlyrequires 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.
Feature
- 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
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- Available As Known Good Die and fully guaranteed to data sheet specifications
Applications
- Multichannel data acquisition for
- ECG and medical instrumentation
- Industrial process controls
- Wheatstone bridge sensors
- Differential drives for
- High resolution input ADCs
- Remote sensors
(Picture: Pinout)
