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±18-Bit ADC with Serial Interface

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 0.1
Data Bus SPI
ADC Architecture MS
Diff/S.E. Input Diff. Only
External VREF (V) (max) 0.545
Bipolar VIN (±V) (max) 0.512
INL (±LSB) 4
Package/Pins PDIP/24
SOIC (W)/24
Budgetary
Price (See Notes)
12.44
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 0.1
Data Bus SPI
ADC Architecture MS
Diff/S.E. Input Diff. Only
External VREF (V) (max) 0.545
Bipolar VIN (±V) (max) 0.512
INL (±LSB) 4
Package/Pins PDIP/24
SOIC (W)/24
Budgetary
Price (See Notes)
12.44

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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX132: Typical Application Circuit MAX132: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .