MAX1139, MAX1139K, MAX1139L, MAX1139M

2.7V to 3.6V and 4.5V to 5.5V, Low-Power, 4-/12-Channel, 2-Wire Serial 10-Bit ADCs

Please check latest availability status for a specific part variant.


The MAX1136–MAX1139 low-power, 10-bit, multichannel 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 (MAX1137/MAX1139) or 4.5V to 5.5V (MAX1136/MAX1138) and require only 670µA at the maximum sampling rate of 94.4ksps. Supply current falls below 230µA for sampling rates under 46ksps. AutoShutdown™ powers down the devices between conversions, reducing supply current to less than 1µA at low throughput rates. The MAX1136/MAX1137 have four analog input channels each, while the MAX1138/MAX1139 have 12 analog input channels each. 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 MAX1137/MAX1139 feature a 2.048V internal reference and the MAX1136/MAX1138 feature a 4.096V internal reference. The MAX1136/MAX1137 are available in an 8-pin µMAX® package. The MAX1138/MAX1139 are available in a 16-pin QSOP package. The MAX1136–MAX1139 are guaranteed over the extended temperature range (-40°C to +85°C). For pin-compatible 12-bit parts, refer to the MAX1236–MAX1239 data sheet. For pin-compatible 8-bit parts, refer to the MAX1036–MAX1039 data sheet.
MAX1136, MAX1137, MAX1138, MAX1139: Typical Operating Circuit MAX1136, MAX1137, MAX1138, MAX1139: Typical Operating Circuit Enlarge+

Key Features

  • High-Speed I²C-Compatible Serial Interface
    • 400kHz Fast Mode
    • 1.7MHz High-Speed Mode
  • Single-Supply
    • 2.7V to 3.6V (MAX1137/MAX1139)
    • 4.5V to 5.5V (MAX1136/MAX1138)
  • Internal Reference
    • 2.048V (MAX1137/MAX1139)
    • 4.096V (MAX1136/MAX1138)
  • External Reference: 1V to VDD
  • Internal Clock
  • 4-Channel Single-Ended or 2-Channel Fully Differential (MAX1136/MAX1137)
  • 12-Channel Single-Ended or 6-Channel Fully Differential (MAX1138/MAX1139)
  • 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
  • Small Packages
    • 8-Pin µMAX (MAX1136/MAX1137)
    • 16-Pin QSOP (MAX1138/MAX1139)


  • Battery-Powered Test Equipment
  • Handheld Portable Applications
  • Medical Instruments
  • Receive Signal Strength Indicators
  • Solar-Powered Remote Systems
  • System Supervision

See parametric specs for Precision ADCs (< 5Msps) (432)

Part NumberResolution
# Input ChannelsConv. Rate
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
External VREF
External VREF
Unipolar VIN
Bipolar VIN
(ADC)(max)(nominal)(min)(max)(max)(max)(See Notes)
MAX1136 10494.4SARI2CBoth4.09615.54.0964.09660-701
$4.79 @1k
MAX1137 42.0483.62.0482.048
$4.36 @1k
MAX1138 124.0965.54.0964.096
$6.72 @1k
MAX1139 122.0483.62.0482.048
$6.72 @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.
Product Reliability Reports: MAX1139.pdf 
Request Reliability Report for: MAX1139K  MAX1139L  MAX1139M 
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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