MAX110, MAX111

Low-Cost, 2-Channel, ±14-Bit Serial ADCs

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Status Explanations for product status codes

Active: In Production.


The MAX110/MAX111 analog-to-digital converters (ADCs) use an internal auto-calibration technique to achieve 14-bit resolution plus overrange, with no external components. Operating supply current is only 550µA (MAX110) and reduces to 4µA in power-down mode, making these ADCs ideal for high-resolution battery-powered or remote-sensing applications. A fast serial interface simplifies signal routing and opto-isolation, saves microcontroller pins, and offers compatibility with SPI™, QSPI™, and MICROWIRE™. The MAX110 operates with ±5V supplies, and converts differential analog signals in the -3V to +3V range. The MAX111 operates with a single +5V supply and converts differential analog signals in the ±1.5V range, or single-ended signals in the 0V to +1.5V range.

Internal calibration allows for both offset and gain-error correction under microprocessor (µP) control. Both devices are available in space-saving 16-pin DIP and SO packages, as well as an even smaller 20-pin SSOP package.

Data Sheet

Download this datasheet in PDF formatDownload Rev 5 (PDF, 424kB)
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An evaluation board is available: MAX110EVC32, MAX110EVKIT

Key Features

  • Single +5V Supply (MAX111)
  • Two Differential Input Channels
  • 14-Bit Resolution Plus Sign and Overrange
  • 0.03% Linearity (MAX110)
    0.05% Linearity (MAX111)
  • Low Power Consumption:
    • 550µA (MAX110)
    • 640µA (MAX111)
    • 4µA Shutdown Current
  • Up to 50 Conversions/sec
  • 50Hz/60Hz Rejection
  • Auto-Calibration Mode
  • No External Components Required
  • 16-Pin DIP/SO, 20-Pin SSOP


  • Data Acquisition
  • Panel Meters
  • Process Control
  • Temperature Measurement
  • Weigh Scales

Key Specifications:

Precision ADCs (< 5Msps)
Part Number Resolution
Input Chan. Conv. Rate
ADC Architecture Data Bus Diff/S.E. Input External VREF
External VREF
Unipolar VIN
Bipolar VIN
ADC max min max max max See Notes
MAX110  14 2 0.05 Sigma-Delta SPI Both -5.3 5.3 3 2.75 $8.02 @1k
MAX111  0 1.8 5.3
See All Precision ADCs (< 5Msps) (456)

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.


MAX110, MAX111: Typical Operating Circuit
Typical Operating Circuit

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Information Index

Document Ref.: 19-0283 Rev 5; 1998-11-01
This page last modified: 2007-07-17