+2.7V, Low-Power, Multichannel, Serial, 8-Bit ADCs

Lowest-Power 8-Bit 4/8-Channel ADCs Have Internal Reference

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The MAX1110/MAX1111 low-power, 8-bit, 8-channel analog-to-digital converters (ADCs) feature an internal track/hold, voltage reference, clock, and serial interface. They operate from a single 2.7V to 5.5V supply and consume only 85µA while sampling at rates up to 50ksps. The MAX1110's 8 analog inputs and the MAX1111's 4 analog inputs are software-configurable, allowing unipolar/bipolar and single-ended/differential operation.

Successive-approximation conversions are performed using either the internal clock or an external serial-interface clock. The full-scale analog input range is determined by the 2.048V internal reference, or by an externally applied reference ranging from 1V to VDD. The 4-wire serial interface is compatible with the SPI™, QSPI™, and MICROWIRE™ serial-interface standards. A serial-strobe output provides the end-of-conversion signal for interrupt-driven processors.

The MAX1110/MAX1111 have a software-programmable, 2µA automatic power-down mode to minimize power consumption. Using power-down, the supply current is reduced to 6µA at 1ksps, and only 52µA at 10ksps. Power-down can also be controlled using the active-low SHDN input pin. Accessing the serial interface automatically powers up the device.

The MAX1110 is available in a 20-pin SSOP package. The MAX1111 is available in a small 16-pin QSOP package.
MAX1110, MAX1111: Functional Diagram MAX1110, MAX1111: Functional Diagram Enlarge+

Key Features

  • 2.7V to 5.5V Single Supply
  • Low Power
    • 85µA at 50ksps
    • 6µA at 1ksps
  • 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1110)
  • 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1111)
  • Internal Track/Hold; 50kHz Sampling Rate
  • Internal 2.048V Reference
  • SPI/QSPI/MICROWIRE-Compatible Serial Interface
  • Software-Configurable Unipolar or Bipolar Inputs
  • Total Unadjusted Error
    • ±1 LSB (max)
    • ±0.3 LSB (typ)


  • 4mA to 20mA-Powered Remote Data-Acquisition Systems
  • Hand-Held Measurement Devices
  • Medical Instruments
  • Portable Data Logging
  • Solar-Powered Remote Systems
  • System Diagnostics

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.

MAX1110EVKIT: Evaluation System for the MAX1110 and MAX1112
MAX1112EVKIT: Evaluation System for the MAX1110 and MAX1112
Product Reliability Reports: MAX1111.pdf 
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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