Datasheet AD8222-KGD (Analog Devices)

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Precision, Dual-Channel Instrumentation Amplifier Known Good Die AD8222-KGD FEATURES FUNCTIONAL BLOCK DIAGRAM Dual-channel AD8222-KGD Gain set with 1 resistor per amplifier (G = 1 to 10,000) 1 2 S T T S Low noise +V OU OU –V 8 nV/√Hz eNI at 1 kHz 0.25 μV p-p RTI, G = 100 to 1000 (0.1 Hz to 10 Hz) –IN1 –IN2 High accuracy dc performance RG1 RG2 120 μV maximum input offset voltage RG1 RG2 0.4 μV/°C maximum average temperature coefficient +IN1 +IN2 2.0 nA maximum input bias current 100 dB minimum CMRR at 4 kHz (G = 100 and G = 1000) Excellent ac performance
01
S 1 2 S
-0
F F +V –V 140 kHz small signal −3 dB bandwidth (G = 100)
319
RE RE
20
13 μs settling time to 0.001%
Figure 1.
Differential output option (single channel)
The AD8222-KGD can also be configured as a single-channel,
Fully specified
differential output in-amp. Differential outputs provide high
Adjustable common-mode output
noise immunity, which can be useful when the output signal must
Power supply operating range: ±2.3 V to ±18 V
travel through a noisy environment, such as with remote
Operational up to 125°C1
sensors. The configuration can also drive differential input
Known Good Die (KGD): these die are fully guaranteed to
analog-to-digital converters (ADCs).
data sheet specifications APPLICATIONS
The AD8222-KGD maintains a minimum CMRR of 80 dB to 4 kHz for all grades at G = 1. High CMRR over frequency
Multichannel data acquisition for
allows the AD8222-KGD to reject wideband interference and
Electrocardiogram (ECG) and medical instrumentation
line harmonics, greatly simplifying filter requirements. The
Industrial process controls
AD8222-KGD also has a typical CMRR drift over temperature
Wheatstone bridge sensors
of just 0.07 μV/V/°C at G = 1.
Differential drives for High resolution input ADCs
The AD8222-KGD operates on both single and dual supplies.
Remote sensors
The device is specified over the industrial temperature range of
GENERAL DESCRIPTION
−40°C to +85°C and is fully RoHS compliant. Furthermore, the AD8222-KGD is operational from −40°C to +125°C1. The AD8222-KGD is a dual-channel, high performance instrumentation amplifier (in-amp) that requires only one For a single-channel version, see the AD8221-KGD. external resistor per amplifier to set gains of 1 to 10,000. Additional application and technical information can be found The AD8222-KGD is a dual, in-amp in a small 4 mm × 4 mm in the AD8222 data sheet. LFCSP. The device requires the same board area as a typical 1 single in-amp. The smaller package allows a 2× increase in See the AD8222 data sheet for expected operation from 85°C to 125°C. channel density and a lower cost per channel, all with no compromise in performance.
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Document Outline Features Applications General Description Functional Block Diagram Revision History Specifications Absolute Maximum Ratings Maximum Power Dissipation ESD Caution Pin Configuration and Function Descriptions Outline Dimensions Die Specifications and Assembly Recommendations Ordering Guide