Datasheet Analog Devices AD8222

Precision, Dual-Channel
Instrumentation Amplifier
AD8222 Data Sheet OUT1 OUT2 –VS FUNCTIONAL BLOCK DIAGRAM 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 +VS FEATURES 16 15 14 13 AD8222
RG2 RG1 3 10 RG2 +IN1 4 9 +IN2 +VS 5 6 7 8
05947-001 –IN2 11 –VS 12 RG1 2 REF2 1 REF1 –IN1 Figure 1. APPLICATIONS
Multichannel data acquisition for
ECG and medical instrumentation …

Precision, Dual-Channel
Instrumentation Amplifier
AD8222-KGD Known Good Die
FEATURES FUNCTIONAL BLOCK DIAGRAM APPLICATIONS
Multichannel data acquisition for
Electrocardiogram (ECG) and medical instrumentation
Industrial process controls
Wheatstone bridge sensors
Differential drives for
High resolution input ADCs
Remote sensors GENERAL DESCRIPTION
The AD8222-KGD is a dual-channel, high performance
instrumentation amplifier (in-amp) that requires only one
external resistor per amplifier to set gains of 1 to 10,000.
The AD8222-KGD is a dual, in-amp in a small 4 mm × 4 mm
LFCSP. The device requires the same board area as a typical
single in-amp. The smaller package allows a 2× increase in
channel density and a lower cost per channel, all with no
compromise in performance. Rev. A –VS OUT2 OUT1 +VS AD8222-KGD +IN2 20319-001 RG2 +IN1 –VS RG2 RG1 REF2 –IN2 RG1 +VS –IN1 REF1 Dual-channel
Gain set with 1 resistor per amplifier (G = 1 to 10,000)
Low noise
8 nV/√Hz eNI at 1 kHz
0.25 μV p-p RTI, G = 100 to 1000 (0.1 Hz to 10 Hz) …

Precision, Dual-Channel
Instrumentation Amplifier
AD8222 Data Sheet OUT1 OUT2 –VS FUNCTIONAL BLOCK DIAGRAM 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 +VS FEATURES 16 15 14 13 AD8222
RG2 RG1 3 10 RG2 +IN1 4 9 +IN2 +VS 5 6 7 8
05947-001 –IN2 11 –VS 12 RG1 2 REF2 1 REF1 –IN1 Figure 1. APPLICATIONS
Multichannel data acquisition for
ECG and medical instrumentation …