GENERAL DESCRIPTION
The AD8253 is an instrumentation amplifier with digitally
programmable gains that has GΩ input impedance, low output noise,
and low distortion making it suitable for interfacing with sensors
and driving high sample rate analog-to-digital converters (ADCs).
It has high bandwidth of 10 MHz, low THD and fast settling time of
615 ns to 0.001%. Offset drift and gain drift are
specified to 1.2 μV/°C and 10 ppm/°C, respectively for G = 1000. In
addition to its wide input common voltage range, it boasts a high
common-mode rejection of 80 dB at G = 1 from dc to
50 kHz. The combination of precision dc performance coupled with
high speed capabilities make the AD8253 an excellent candidate for
data acquisition. Furthermore, this monolithic solution simplifies
design and manufacturing, and boosts performance of instrumentation
by maintaining a tight match of internal resistors and amplifiers.
FEATURES
Small package: 10-lead MSOP
Programmable gains: 1, 10, 100, 1000
Digital or pin-programmable gain setting
Wide supply: ±5 V to ±15 V
Excellent dc performance
High CMRR 120 dB , G = 100
Low gain drift: 10 ppm/°C
Low offset drift: 1.2 μV/°C , G = 1000
Excellent ac performance
Fast settling time: 615 ns to 0.001%
High slew rate: 20 V/μs
Low distortion:
High CMRR over frequency: 80 dB to 50 kHz
Low noise: 8 nV/√Hz, G = 1000
Low power: 4 mA
APPLICATIONS
Data acquisition
Biomedical analysis
Test and measurement
