Low-Power, 1-/2-Channel, I²C, 12-Bit ADCs in Ultra-Tiny 1.9mm x 2.2mm Package

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1-/2-Channel, 12-Bit ADCs Broaden the Industry's Largest I²C Portfolio

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Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $1.50
  • Ultra-Tiny 1.9mm x 2.2mm Wafer Level Package
  • High-Speed I²C-Compatible Serial Interface
    • 400kHz Fast Mode
    • 1.7MHz High-Speed Mode
  • Single-Supply
    • 2.7V to 3.6V (MAX11645)
    • 4.5V to 5.5V (MAX11644)
  • Internal Reference
    • 2.048V (MAX11645)
    • 4.096V (MAX11644)
  • External Reference: 1V to VDD
  • Internal Clock
    • 2-Channel Single-Ended or 1-Channel Fully Differential
  • Internal FIFO with Channel-Scan Mode
  • Low Power
    • 670µA at 94.4ksps
    • 230µA at 40ksps
    • 60µA at 10ksps
    • 6µA at 1ksps
    • 0.5µA in Power-Down Mode
  • Software-Configurable Unipolar/Bipolar
Additional Details
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The MAX11644/MAX11645 low-power, 12-bit, 1-/2-channel analog-to-digital converters (ADCs) feature internal track/hold (T/H), voltage reference, clock, and an I²C-compatible 2-wire serial interface. These devices operate from a single supply of 2.7V to 3.6V (MAX11645) or 4.5V to 5.5V (MAX11644) and require only 6µA at a 1ksps sample rate. AutoShutdown™ powers down the devices between conversions, reducing supply current to less than 1µA at low throughput rates. The MAX11644/MAX11645 each measure two single-ended or one differential input. The fully differential analog inputs are software configurable for unipolar or bipolar, and single-ended or differential operation.

The full-scale analog input range is determined by the internal reference or by an externally applied reference voltage ranging from 1V to VDD. The MAX11645 features a 2.048V internal reference and the MAX11644 features a 4.096V internal reference.

The MAX11644/MAX11645 are available in an ultra-tiny 1.9mm x 2.2mm WLP package and an 8-pin µMAX® package. The MAX11644/MAX11645 are guaranteed over the extended temperature range (-40°C to +85°C). For pin-compatible 10-bit parts, refer to the MAX11646/MAX11647 data sheet.


  • Battery-Powered Test Equipment
  • Handheld Portable Applications
  • Medical Instruments
  • Power-Supply Monitoring
  • Received-Signal-Strength Indicators
  • Solar-Powered Remote Systems
  • System Supervision
Part Models 2
1ku List Price Starting From $1.50

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