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High Gain 10 MHz Digitally Programmable Instrumentation Amplifier

21st August 2007

Analog Devices

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Designed for data acquisition systems, automatic test equipment and biomedical instruments requiring fast, accurate measurement with robust signal conditioning over large voltage ranges, the AD8253 digitally programmable instrumentation amplifier is able to reach gains of 1,000 while offering dc precision and ac bandwidth unmatched by other in-amps or discrete solutions on the market. A large gain setting allows small signals, such as those from sensors, to be amplified to drive an ADC.

The AD8253 is digitally programmable with gain settings of 1, 10, 100 and 1000, letting users adjust gain even after the devices are designed into the system. Operating from ±5 V to ±15 V, it achieves 10 MHz bandwidth and 0.5-microsecond settling time to 0.01 percent. The input offset drift of 1.2 microvolt/degree C and gain drift of 10 ppm/degree C is the lowest of any programmable gain in-amp. Manufactured using Analog Devices’ iCMOS™ (industrial CMOS) process technology, the AD8253 draws just 4 mA of quiescent current and is available in 10-lead MSOP (mini small-outline plastic) packages.

The AD8253 is the newest member of digitally programmable instrumentation amplifiers from ADI, complementing the AD8250 and AD8251. In addition, the AD8253 is tailored to operate with high-performance ADCs, such as ADI’s AD7621, AD7671, AD7674, AD7677, AD7678, AD7679, AD7685, AD7612 and AD7946 and AD7947 PulSAR® high-resolution SAR ADCs and ADI’s ADR431 and ADR435 voltage references.