Instrumentation amplifier combines low noise, power and distortion

Analog Devices Inc. has introduced an ultra-low noise, low-power low-distortion instrumentation amplifier (in amp) for the precision measurement of extremely small signals present in noisy industrial operating environments.

The high-bandwidth AD8429 in amp is one of the fastest in amps on the market with a current feedback architecture that offers 15 MHz (G=1) bandwidth and a 22-V/μs slew rate, which is 30 percent higher than competing in amps, according to the company. With a low distortion of -130-dB, the AD8429 is robust enough for applications that demand reduced size, power and distortion levels, such as healthcare instrumentation, precision data acquisition equipment and industrial vibration analysis.

Key highlights:

* Low noise

o 1-nV/√Hz input noise
o 45-nV/√Hz output noise

* High accuracy dc performance

o 90-dB CMRR minimum (G = 1)
o 50-μV maximum input offset voltage
o 0.02 percent maximum gain accuracy (G = 1)

* AC specifications

o 80-dB CMRR to 5 kHz (G = 1)
o 15-MHz bandwidth (G = 1)
o 22-V/μs slew rate

Information is shared by www.irvs.info