Low-Power, 3 1/2 Digit A/D Converter

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The Maxim ICL7136 is a monolithic analog to digital converter with very high input impedance. On-board active components include segment drivers, segment decoders, voltage reference and a clock circuit. The ICL7136 directly drives a non-multiplexed liquid crystal (LCD) display, requiring no external display drive circuitry. Significantly reduced power consumption makes the ICL7136 a superior device, especially for portable systems.

Versatility and accuracy are inherent features of this converter. The dual-slope conversion technique automatically rejects interference signals common in industrial environments. The true differential input and reference are particularly useful when making ratiometric measurements (ohms or bridge transducers), and the zero-integrator phase in Maxim's ICL7136 eliminates overrange hangover and hysteresis effects. Finally, this device offers high accuracy by lowering rollover error to less than one count and zero reading drift to less than 1μV/°C.
ICL7136: Typical Operating Circuit ICL7136: Typical Operating Circuit Enlarge+

Key Features

  • Improved Second Source!
  • Power Dissipation Guaranteed Less than 1mW 9V Battery Life 3000 Hours Typical
  • Guaranteed First Reading Recovery from Overrange
  • Zero Input Gives Zero Reading
  • Drives LCD Displays Directly
  • Low Noise (15μVp-p) Without Hysteresis or Overrange Hangover
  • True Differential Reference and Input
  • Monolithic, Low-Power CMOS Design


  • Conductance
  • Current
  • Material Thickness
  • Pressure
  • Resistance
  • Speed
  • Temperature
  • Voltage

See parametric specs for Display-Oriented ADCs (27)

Part NumberResolution
Conv. Rate
Data BusDiff/S.E. InputExternal VREF
External VREF
Bipolar VIN
maxminmaxmaxSee Notes
ICL7136 20000.00257-SegmentDiff. Only-999
$5.27 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Request Reliability Report for: ICL7136 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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