Dual and Quad Channel Micropower,

Single Supply, Rail-to-Rail Input and

Output (RRIO) Instrumentation Amplifiers

   The ISL28270 and ISL28273 are dual channel micropower instrumentation amplifiers (in-amps) and the ISL28470 is a quad channel in-amp optimized for single supply operation over the +2.4V to +5.5V range.

   All three devices feature an Input Range Enhancement Circuit (IREC) which maintains CMRR performance for input voltages equal to the positive supply and down to 50mV above the negative supply rail. The input signal is capable of swinging above the positive supply rail and to 10mV above the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail.

Features

• 150µV max offset voltage (ISL28270, ISL28470)

• 600µV max offset voltage (ISL28273)

• 2.5nA max input bias current (ISL28270, ISL28470)

• 110dB CMRR

• 0.7µV/°C offset voltage temperature coefficient

• 240kHz -3dB bandwidth (G = 100) ISL28270, ISL28470

• 230kHz -3dB bandwidth (G = 10) ISL28273

• Single supply operation

• Rail-to-rail input and output (RRIO)

• Pb-free plus anneal available (RoHS compliant)

Applications

• Battery or solar-powered systems

• Strain gauge

• Sensor signal conditioning

• Medical devices

• Industrial instrumentations