The ISL28233 and ISL28433 are dual and quad micropower, chopper stabilized operational amplifiers that are optimized for single and dual supply operation from 1. 65V to 6. 0V and ±0. 825V to ±3. 0V. Their low supply current of 18µA and wide input range enable the ISL28233, ISL28433 to be excellent general purpose op amps for a wide range of applications. The ISL28233 and ISL28433 are ideal for handheld devices that operate off 2 AA or single Li-ion batteries. The ISL28233 is available in 8 Ld MSOP, 8 Ld SOIC and 8 Ld DFN packages. The ISL28433 is available in 14 Ld TSSOP, 14 Ld SOIC and 14 Ld 3mmx4mm TDFN packages. All devices operate over the temperature range of -40°C to +125°C.


  • Low Input Offset Voltage: 6µV, Max.
  • Low Offset Drift: 0.05µV/°C, Max.
  • Quiescent Current (Per Amplifier): 18µA, Typ.
  • Single Supply Range: +1.65V to +6.0V
  • Dual Supply Range: ±0.825V to ±3.0V
  • Low Noise (0.01Hz to 10Hz): 1.0µVP-P, Typ.
  • Rail-to-Rail Inputs and Output
  • Input Bias Current: 180pA, Max.
  • Operating Temperature Range: -40°C to +125°C


  • Bi-Directional Current Sense
  • Temperature Measurement
  • Medical Equipment
  • Electronic Weigh Scales
  • Precision/Strain Gauge Sensor
  • Precision Regulation
  • Low Ohmic Current Sense
  • High Gain Analog Front Ends

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active SOICN Tube 660
Active SOICN Reel 1000
Active SOICN Reel 250
Active TSSOP Tube 752
Active TSSOP Reel 2500
Active TSSOP Reel 250

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ISL28233, ISL28433 Datasheet Datasheet PDF 1.70 MB
User Guides & Manuals
ISL28233MSOPEVAL2Z User Guide Manual PDF 374 KB
ISL28433SOICEVAL1Z, ISL28433TSSOPEVAL1Z User Guide Manual PDF 497 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
AN1556: Building an Accurate SPICE Model for Low Noise, Low Power Precision Amplifiers Application Note PDF 976 KB
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
AN1613: From SPICE Netlist to Allegro Design Sub-Circuit Application Note PDF 1.02 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
PCN12094 - Alternate Manufacturing Site for Assembly of the Listed Intersil Packaged Products - Amkor Technology, Philippines (ATP) Product Change Notice PDF 98 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
PCN11077 - Data Sheet Specification Change for Intersil ISL28233* and ISL28433* Products Product Change Notice PDF 81 KB
ISL28133, ISL28233, ISL28433 Macromodel 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
ISL28433SOICEVAL1Z Quad Micropower, Chopper Stabilized, RRIO Op Amp Evaluation Board Evaluation
ISL28433TSSOPEVAL1Z Quad Micropower, Chopper Stabilized, RRIO Op Amp Evaluation Board Evaluation