The EL8171 and EL8172 are micropower instrumentation amplifiers optimized for single supply operation over the +2. 4V to +5. 5V range. Inputs and outputs can operate rail-to-rail. As with all instrumentation amplifiers, a pair of inputs provide very high common-mode rejection and are completely independent from a pair of feedback terminals. The feedback terminals allow zero input to be translated to any output offset, including ground. A feedback divider controls the overall gain of the amplifier. The EL8172 is compensated for a gain of 100 or more, and the EL8171 is compensated for a gain of 10 or more. The EL8171 and EL8172 have PMOS input devices that provide sub-nA input bias currents. The amplifiers can be operated from one lithium cell or two Ni-Cd batteries. The EL8171 and EL8172 input range goes from below ground to slightly above positive rail. The output stage swings completely to ground (ground sensing) or positive supply - no pull-up or pull-down resistors are needed.


  • 95µA maximum supply current
  • Maximum input offset voltage
  • 300µV (EL8172)
  • 1500µV (EL8171)
  • 50pA maximum input bias current
  • 450kHz -3dB bandwidth (G = 10)
  • 170kHz -3dB bandwidth (G = 100)
  • Single supply operation
  • Input voltage range is rail-to-rail
  • Output swings rail-to-rail
  • Ground sensing
  • Pb-free (RoHS compliant)


  • Battery- or solar-powered systems
  • Strain gauges
  • Current monitors
  • Thermocouple amplifiers

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Last Time Buy SOICN Tube 97
Last Time Buy SOICN Reel 1000
Last Time Buy SOICN Reel 250

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
EL8171, EL8172 Datasheet Datasheet PDF 998 KB
Application Notes & White Papers
How to Bias Op-Amps Correctly Application Note PDF 263 KB
AN1993: Voltage Feedback versus Current Feedback Operational Amplifiers Application Note PDF 564 KB
AN1298: Instrumentation Amplifier Application Note Application Note PDF 1.59 MB
AN1561: Radiated Interference in Audio Circuits Application Note PDF 556 KB
AN1556: Building an Accurate SPICE Model for Low Noise, Low Power Precision Amplifiers Application Note PDF 976 KB
AN1613: From SPICE Netlist to Allegro Design Sub-Circuit Application Note PDF 1.02 MB
AN1560: Making Accurate Voltage Noise and Current Noise Measurements on Operational Amplifiers Down to 0.1Hz Application Note PDF 2.04 MB
AN1694: The Four Basic Building Blocks of an Op Amp Application Note PDF 357 KB
AN535: Design Considerations for a Data Acquisition System (DAS) Application Note PDF 843 KB
PCN12085 - 8l, 14l, 16l SOIC w/ Gold Bond Wire @ ATP as Alternate Assembly Site Product Change Notice PDF 152 KB
PCN12084 - Manufacturing Site Change for the Listed Intersil Products - Carsem (CAS) Ipoh Malaysia Product Change Notice PDF 135 KB
PCN10052 - Wafer Fabrication Site Change for the Listed Intersil Products - NXP Semiconductor Nijmegen, Netherlands Product Change Notice PDF 52 KB
PLC20036 - 2H EOL 2020 Product Life Cycle Notice PDF 319 KB
TB514: Operational Amplifier Basics Other PDF 519 KB
PA14042 - Minimum Line Quantity Change Product Advisory PDF 363 KB
General-purpose operational amplifiers and comparators Pamphlet ( D18268EJ2V0PF00 ) Flyer PDF 1.11 MB