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MAX1137, MAX1137K, MAX1137L, MAX1137M

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

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 10
# Input Channels 4
Conv. Rate (ksps) (max) 94.4
Data Bus I2C
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.048
External VREF (V) (min) 1
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 2.048
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 1
Package/Pins UMAX/8
Budgetary
Price (See Notes)
4.62
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 10
# Input Channels 4
Conv. Rate (ksps) (max) 94.4
Data Bus I2C
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.048
External VREF (V) (min) 1
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 2.048
Bipolar VIN (±V) (max) 2.048
INL (±LSB) 1
Package/Pins UMAX/8
Budgetary
Price (See Notes)
4.62

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)

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX1136, MAX1137, MAX1138, MAX1139: Typical Operating Circuit MAX1136, MAX1137, MAX1138, MAX1139: Typical Operating 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 .