The ISL28194 is micropower op amps optimized for low-power applications. The part is designed for single-supply operation from 1. 8V to 5. 5V, making it suitable for applications with two 1. 5V alkaline batteries. The ISL28194 consumes typically 330nA of supply current. The part feature rail-to-rail input and output swing (RRIO), allowing for maximum battery usage. Equipped with a shutdown pin, the part draw typically 2nA when off. The combination of small footprint, low power, single supply, and rail-to-rail operation makes it ideally suited for all battery operated device.


  • Typical Supply Current 330nA
  • Ultra-Low Single-Supply Operation Down to +1.8V
  • Rail-to-Rail Input/Output Voltage Range (RRIO)
  • Maximum 2mV Offset Voltage
  • Maximum 60pA Input Bias Current
  • 3.5kHz Gain Bandwidth Product
  • ENABLE Pin Feature
  • -40°C to +125°C Operation
  • Pb-Free (RoHS Compliant)


  • 2-Cell Alkaline Battery-Powered/Portable Systems
  • Window Comparators
  • Threshold Detectors/Discriminators
  • Mobile Communications
  • Low Power Sensors

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active SOT23 Reel 3000
Active SOT23 Reel 250
Active uTDFN Reel 2000

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL28194 Datasheet Datasheet PDF 1.02 MB
User Guides & Manuals
ISL2819xEVAL1Z User Guide Manual PDF 416 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
AN1728: Users Guide to Intersil's Online Noninverting Op Amp Designer Application Note PDF 1.49 MB
AN1689: Perform Coarse and Fine Correction with Less Costly Dual DCPs Application Note PDF 200 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
AN1561: Radiated Interference in Audio Circuits Application Note PDF 556 KB
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
PCN12084 - Manufacturing Site Change for the Listed Intersil Products - Carsem (CAS) Ipoh Malaysia Product Change Notice PDF 135 KB
PCN10114 - Part Marking Configuration Change for Intersil TDFN, uTDFN, and uTQFN Packaged Products Product Change Notice PDF 205 KB
ISL28194 Macromodel Model TXT 4 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
ISL28194EVAL1Z Ultra-Small, Single Supply, RRIO Op Amp Evaluation Board Evaluation