AD8223 Datasheet, PDF (1/20 Pages) Analog Devices – Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier

Preliminary Technical Data
FEATURES
Gain set with 1 resistor per amplifier
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: ±2.5V to ±12.5
Single supply: 3V to 25V
600 μA maximum supply current
APPLICATIONS
Low power medical instrumentation
Transducer interface
Thermocouple amplifiers
Industrial process controls
Difference amplifiers
Low power data acquisition
Single Supply, Rail-to-Rail, Low Cost
Instrumentation Amplifier
AD8223
CONNECTION DIAGRAM
–R_G 1
–IN 2
–
+IN 3
+
–V_S 4 _AD8223
8 +R_G
7 +V_S
6 OUTPUT
5 REF
Figure 1. 8-Lead SOIC (R) and 8-Lead MSOP SOIC (RM) Packages
GENERAL DESCRIPTION
The AD8223 is an integrated single-supply instrumentation
amplifier that delivers rail-to-rail output swing on a single
supply (+3.0 V to +25 V supplies). The AD8223 offers superior
user flexibility by allowing single-gain set resistor program-
ming, and conforming to the 8-lead industry standard pinout
configuration.
With no external resistor, the AD8223 is configured for G = 5
and with an external resistor, the AD8223 can be programmed
for gains up to 1000.
The AD8223 holds errors to a minimum by providing superior
ac CMRR that increases with increasing gain. Line noise, as
well as line harmonics, is rejected because the CMRR remains
constant up to 200 Hz. The AD8223 has a wide input common-
mode range and can amplify signals that have a common-mode
voltage 150 mV below ground. Although the design of the AD8223
is optimized to operate from a single supply, the AD8223 still
provides superior performance when operated from a dual
voltage supply (±2.5 V to ±12.5 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. PrA
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