Single-Supply, Low Cost
Instrumentation Amplifier
AD8223
Gain set with 1 resistor
Gain = 5 to 1000
Inputs
Voltage range to 150 mV below negative rail
25 nA maximum input bias current
30 nV/√Hz, RTI noise @ 1 kHz
Power supplies
Dual supply: ±2 V to ±12 V
Single supply: 3 V to 24 V
500 μA maximum supply current
APPLICATIONS
Low power medical instrumentation
Transducer interface
Thermocouple amplifiers
Industrial process controls
Difference amplifiers
Low power data acquisition
CONNECTION DIAGRAM
–RG
1
8
+RG
–IN
2
–
7
+VS
+IN
3
+
6
OUT
–VS
4
5
REF
AD8223
06925-001
FEATURES
Figure 1. 8-Lead SOIC (R) and 8-Lead MSOP (RM) Packages
Table 1. Instrumentation Amplifiers by Category
GeneralPurpose
AD82201
AD8221
AD8222
AD82241
AD8228
1
Zero Drift
AD82311
AD85531
AD85551
AD85561
AD85571
Mil
Grade
AD620
AD621
AD524
AD526
AD624
Low
Power
AD6271
AD6231
AD8223
High Voltage
PGA
AD8250
AD8251
AD8253
Rail-to-rail output.
GENERAL DESCRIPTION
The AD8223 is an integrated single-supply instrumentation
amplifier that delivers rail-to-rail output swing on a single
supply (3 V to 24 V). The AD8223 conforms to the 8-lead
industry standard pinout configuration.
The AD8223 is simple to use: one resistor sets the gain. With no
external resistor, the AD8223 is configured for G = 5. With an
external resistor, the AD8223 can be programmed for gains up
to 1000.
The AD8223 has a wide input common-mode range and can
amplify signals that have a 150 mV common-mode voltage
below ground. Although the design of the AD8223 is optimized
to operate from a single supply, the AD8223 still provides
excellent performance when operated from a dual voltage
supply (±2 V to ±12 V).
Low power consumption (1.5 mW at 3 V), wide supply voltage
range, and rail-to-rail output swing make the AD8223 ideal for
battery-powered applications. The rail-to-rail output stage
maximizes the dynamic range when operating from low supply
voltages. The AD8223 replaces discrete instrumentation
amplifier designs and offers superior linearity, temperature
stability, and reliability in a minimum of space.
Rev. 0
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
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