Support is limited to customers who have already adopted these products.

The ISL28158 and ISL28258 are micro-power precision operational amplifiers optimized for single supply operation at 5. 5V and can operate down to 2. 4V. These devices feature an Input Range Enhancement Circuit (IREC), which enables them to maintain CMRR performance for input voltages greater than the positive supply. The input signal is capable of swinging 0. 25V above the positive supply and to 100mV below the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail. The ISL28158 and ISL28258 draw minimal supply current while meeting excellent DC-accuracy noise and output drive specifications. Competing devices seriously degrade these parameters to achieve micro-power supply current. Offset current, voltage and current noise, slew rate, and gain bandwidth product are all two to ten times better than on previous micro-power op amps. The 1/f corner of the voltage noise spectrum is at 100Hz. This results in low frequency noise performance, which can only be found on devices with an order of magnitude higher supply current. ISL28158 and ISL28258 can be operated from one lithium cell or two Ni-Cd batteries. The input range includes both positive and negative rail. The output swings to both rails.


  • 34µA typical supply current (ISL28158)
  • 68µA typical supply current (ISL28258)
  • 300µV maximum offset voltage (8 Ld SOIC)
  • 1pA typical input bias current
  • 200kHz gain bandwidth product
  • 2.4V to 5.5V single supply voltage range
  • Rail-to-rail input and output
  • Enable pin (ISL28158 only)
  • Pb-free (RoHS compliant)


  • Battery- or solar-powered systems
  • 4mA to 20mA current loops
  • Handheld consumer products
  • Medical devices
  • Sensor amplifiers
  • ADC buffers
  • DAC output amplifiers

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Obsolete SOICN Tube 1940
Obsolete SOICN Reel 2000
Obsolete SOT23 Reel 3000
Obsolete SOT23 Reel 250

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL28158, ISL28258 Datasheet Datasheet PDF 1.24 MB
User Guides & Manuals
ISL281x8EVAL1Z User Guide Manual PDF 407 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
AN1548: Designer's Manual for the iSim Active Filter Designer Application Note PDF 8.19 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
PCN13022 - Alternate Manufacturing Site for Assembly of the Listed Intersil SOT23 Packaged Products - Carsem (CAM) Ipoh, Malaysia Product Change Notice PDF 557 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
isl28158 Model TXT 5 KB
TB514: Operational Amplifier Basics Other PDF 519 KB
General-purpose operational amplifiers and comparators Pamphlet Flyer PDF 1.11 MB

Boards & Kits

Part Number Title Type Company
ISL28148EVAL1Z Single Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps Evaluation Board Evaluation
ISL28158EVAL1Z Single Precision Rail-to-Rail Input-Output (RRIO) Low Input Bias Current Op Amps Evaluation Board Evaluation