ISL28271: Dual Micropower, Single Supply, Rail-to-Rail Input and Output (RRIO) Instrumentation Amplifier

The ISL28271 and ISL28272 are dual micropower instrumentation amplifiers (in-amps) optimized for single supply operation over the +2.4V to +5.5V range.

Both devices feature an Input Range Enhancement Circuit (IREC) which maintains CMRR performance for input voltages equal to the positive and negative supply rails. The input signal is capable of swinging 10% above the positive supply rail and to 100mV below the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail.

The ISL28271 is compensated for a minimum gain of 10 or more. For higher gain applications, the ISL28272 is compensated for a minimum gain of 100. The in-amps have CMOS input devices for maximum input common voltage range. The amplifiers can be operated from one lithium cell or two Ni-Cd batteries.

Key Features
  • 120µA typical supply current for both channels
  • 30pA max input bias current
  • 100dB CMRR, PSRR
  • 0.7µV/°C offset voltage temperature coefficient
  • 180kHz 3dB Bandwidth - ISL28271
  • 100kHz 3dB Bandwidth - ISL28272
  • 0.5V/µs slew rate
  • Single supply operation
  • Rail-to-rail input and output (RRIO)
  • Input is capable of swinging above V+ and below V- (ground sensing)
  • 0.081%1 typical gain error - ISL28271
  • -0.19%1 typical gain error - ISL28272
  • Pb-free available (RoHS compliant)
Applications
  • Battery- or solar-powered systems
  • Strain gauge
  • Sensor signal conditioning
  • Medical devices
  • Industrial instrumentations
Typical Diagram
Application Notes
TitleTypeUpdatedSizeOther Languages
AN1613: From SPICE Netlist to Allegro Design Sub-circuitPDF13 Nov 2014925 KB
AN1560: Making Accurate Voltage Noise and Current Noise Measurements on Operational Amplifiers Down to 0.1HzPDF13 Nov 20141.8 MB
AN1561: Radiated Interference in Audio CircuitsPDF13 Nov 2014370 KB
AN1556: Building an Accurate SPICE Model for Low Noise, Low Power Precision AmplifiersPDF13 Nov 2014866 KB
AN1298: Instrumentation Amplifier Application NotePDF13 Nov 2014717 KB
Datasheets
TitleTypeUpdatedSizeOther Languages
ISL28271, ISL28272 DatasheetPDF16 Sep 2015656 KB日本語
User Guides
TitleTypeUpdatedSizeOther Languages
ISL2827xINEVAL1Z User GuidePDF13 Nov 2014194 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
ISL28271FAZ16 Ld QSOP0.08163260RoHS
ISL28271FAZ-T716 Ld QSOP T+R0.08163260RoHS
ISL28271INEVAL1ZN/ARoHS
Datasheet
ISL28271, ISL28272 Datasheet 16 Sep 2015
ISL28271, ISL28272 Datasheet 16 Sep 2015
Other
ISL2827xINEVAL1Z User Guide 13 Nov 2014
AN1298: Instrumentation Amplifier Application Note 13 Nov 2014
AN1556: Building an Accurate SPICE Model for Low Noise, Low Power Precision Amplifiers 13 Nov 2014
AN1560: Making Accurate Voltage Noise and Current Noise Measurements on Operational Amplifiers Down to 0.1Hz 13 Nov 2014
AN1561: Radiated Interference in Audio Circuits 13 Nov 2014
AN1613: From SPICE Netlist to Allegro Design Sub-circuit 13 Nov 2014
ISL28271
16 Ld QSOP T+R EL7457