Application·Multichannel data acquisition forECG and medical instrumentationIndustrial process controlsWheatstone bridge sensors·Differential drives forHigh resolution input ADCsRemote sensorsPinoutSpecifications Parameter Rating Supply Voltage, VPSO, VPSI ±18 V Output Short-Circuit C...
AD8222: Application·Multichannel data acquisition forECG and medical instrumentationIndustrial process controlsWheatstone bridge sensors·Differential drives forHigh resolution input ADCsRemote sensorsPinout...
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Parameter | Rating |
Supply Voltage, VPSO, VPSI | ±18 V |
Output Short-Circuit Current | Indefinite |
Input Voltage (Common Mode) | ±VS |
Differential Input Voltage | ±VS |
Storage Temperature Range | −65°C to +130°C |
Operational Temperature Range | −40°C to +125°C |
Package Glass Transition Temperature (TG) | 130°C |
ESD (Human Body Model) | 1 kV |
ESD (Charge Device Model) | 1 kV |
Single/Dual Supply | Dual |
Gain Setting Method | Resistor |
Gain Range (min to max) | 10000 |
Bandwidth G=10 (kHz typ) | 750kHz |
Vnoise RTI 1-10 Hz Vp-p | 0.25V p-p |
Temperature Range | -40 to +85 |
Supply Current | 0.9mA |
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 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 V/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.