GENERAL DESCRIPTION

The AD8230 is a low drift, differential sampling, precision instrumentation amplifier. Auto-zeroing reduces offset voltage drift to less than 50 nV/°C. The AD8230 is well-suited for thermocouple and bridge transducer applications. The AD8230’s high CMR of 110 dB (minimum) rejects line noise in measurements where the sensor is far from the instrumentation.

The 16 V rail-to-rail, common-mode input range is useful for noisy environments where ground potentials vary by several volts. Low frequency noise is kept to a minimal 3 μV p-p, making the AD8230 perfect for applications requiring the utmost dc precision. Moreover, the AD8230 maintains its high performance over the extended industrial temperature range of −40°C to +125°C.

FEATURES

Resistor programmable gain range: 10 1 to 1000

Supply voltage range: ±4 V to ±8 V

Rail-to-rail input and output

Maintains performance over −40°C to +125°C

Excellent ac and dc performance

110 dB minimum CMR @ 60 Hz, G = 10 to 1000

10 μV maximum offset voltage (RTI, ±5 V operation)

50 nV/°C maximum offset drift

20 ppm maximum gain nonlinearity

APPLICATIONS

Pressure measurements

Temperature measurements

Strain measurements

Automotive diagnostics