1. Products
  2. A/D Converters (ADC)
  3. Precision A/D Converters
  4. Multiplexed A/D Converters
  5. MAX1147


Features and Benefits

  • 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1148/MAX1149)
  • 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1146/MAX1147)
  • Internal Multiplexer and T/H
  • Single-Supply Operation
    • 4.75V to 5.25V Supply (MAX1146/MAX1148)
    • 2.7V to 3.6V Supply (MAX1147/MAX1149)
  • Internal Reference
    • +4.096V (MAX1146/MAX1148)
    • +2.500V (MAX1147/MAX1149)
  • 116ksps Sampling Rate
  • Low Power
    • 1.1mA (116ksps)
    • 120µA (10ksps)
    • 12µA (1ksps)
    • 300nA (Power-Down Mode)
  • SPI-/QSPI-/MICROWIRE Compatible
  • 20-Pin TSSOP

Product Details

The MAX1146–MAX1149 low-power, 14-bit, multichannel, analog-to-digital converters (ADCs) feature an internal track/hold (T/H), voltage reference, and clock. The MAX1146/MAX1148 operate from a single +4.75V to +5.25V supply, and the MAX1147/MAX1149 operate from a single +2.7V to +3.6V supply. All analog inputs are software configurable for unipolar/bipolar and single-ended/differential operation.

The 4-wire serial interface connects directly to SPI™/QSPI™/MICROWIRE™ devices without external logic. The serial strobe output (SSTRB) allows convenient connection to digital signal processors. The MAX1146–MAX1149 use an internal clock or an external serial-interface clock to perform successive-approximation analog-to-digital conversions.

The MAX1146/MAX1148 include an internal +4.096V reference, while the MAX1147/MAX1149 include an internal +2.500V reference. All devices accept an external reference from 1.5V to VDD.

The MAX1146–MAX1149 provide a hardware shutdown and two software power-down modes. Using the software power-down modes allows the devices to be powered down between conversions. When powered down, accessing the serial interface automatically powers up the devices. The quick turn-on time allows power-down between all conversions. This technique reduces supply current to under 120µA for quick turn-on. The MAX1146–MAX1149 are available in a 20-pin TSSOP package.


  • Battery-Powered Instruments
  • Data Acquisition
  • Medical Instruments
  • Portable Data Logging
  • Process Control

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

Product Recommendations

MAX1147 Companion Parts

Design Resources

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Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX1147BCUP+ Material Declaration Reliability Data Thin Shrink Small-Outline Package
Wafer Fabrication Data

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