±18-Bit ADC with Serial Interface

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The MAX132 is a CMOS, 18-bit plus sign, serial-output, analog-to-digital converter (ADC). Multi-slope integration provides high-resolution conversions in less time than standard integrating ADCs, allowing operation up to 100 conversions per second. Low conversion noise provides guaranteed operation with ±512mV full-scale input range (2µV/LSB). A simple 4-wire serial interface connects easily to all common microprocessors, and twos-complement output coding simplifies bipolar measurements. Typical supply current is only 60µA and is reduced to 1µA in sleep mode. Four serially programmed digital outputs can be used to control an external multiplexer or programmable-gain amplifier. The MAX132 comes in 24-pin narrow DIP and wide SO packages, and is available in commercial and extended temperature grades.

High resolution, compact size, and low power make this device ideal for data loggers, weigh scales, data-acquisition systems, and panel meters.
MAX132: Typical Application Circuit MAX132: Typical Application Circuit Enlarge+

Key Features

  • Low Supply Current:
    • 60µA (Normal Operation)
    • 1µA (Sleep-Mode Operation)
  • ±0.006% FSR Accuracy at 16 Conv/sec
  • Low Noise: 15µVRMS
  • Serial I/O Interface with Programmed Output for Mux and PGA
  • Performs up to 100 Conv/sec
  • ±2pA Input Current
  • 50Hz/60Hz Rejection


  • Battery-Powered Applications
  • Industrial Process Controls
  • Remote Data Acquisition
  • Transducer-Signal Measurement Pressure, Flow, Temperature, Voltage Current, Resistance, Weight

See parametric specs for Precision ADCs (< 5Msps) (437)

Part NumberResolution
Input Chan.Conv. Rate
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
Bipolar VIN
ADCmaxmaxmaxSee Notes
MAX132 1810.1MSSPIDiff. Only0.5450.5124
SOIC (W)/24
$11.74 @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.

MAX132EVKIT: Evaluation Kit for the MAX132
Request Reliability Report for: MAX132 
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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