3Msps, Low-Power, Serial 12-/10-Bit, 8-/16-Channel ADCs

Most Flexible Family of Pin- and Software-Compatible, 3Msps, Multichannel ADCs with External Reference

Please check latest availability status for a specific part variant.


The MAX11129–MAX11132 are 12-/10-bit with external reference and industry-leading 1.5MHz, full linear bandwidth, high speed, low-power, serial output successive approximation register (SAR) analog-to-digital converters (ADCs). The MAX11129–MAX11132 include both internal and external clock modes. These devices feature scan mode in both internal and external clock modes. The internal clock mode features internal averaging to increase SNR. The external clock mode features the SampleSet™ technology, a user-programmable analog input channel sequencer. The SampleSet approach provides greater sequencing flexibility for multichannel applications while alleviating significant microcontroller or DSP (controlling unit) communication overhead.

The internal clock mode features an integrated FIFO allowing data to be sampled at high speeds and then held for readout at any time or at a lower clock rate. Internal averaging is also supported in this mode improving SNR for noisy input signals. The devices feature analog input channels that can be configured to be single-ended inputs, fully differential pairs, or pseudo-differential inputs with respect to one common input. The MAX11129–MAX11132 operate from a 2.35V to 3.6V supply and consume only 15.2mW at 3Msps.

The MAX11129–MAX11132 include AutoShutdown™, fast wake-up, and a high-speed 3-wire serial interface. The devices feature full power-down mode for optimal power management.

The 48MHz, 3-wire serial interface directly connects to SPI, QSPI™, and MICROWIRE® devices without external logic.

Excellent dynamic performance, low voltage, low power, ease of use, and small package size make these converters ideal for portable battery-powered data-acquisition applications, and for other applications that demand low power consumption and small space.

The MAX11129–MAX11132 are available in 28-pin, 5mm x 5mm, TQFN packages and the MAX11131 is available in a 28-pin TSSOP package. All devices operate over the -40°C to +125°C temperature range. 

MAX11129, MAX11130, MAX11131, MAX11132: Typical Application Circuit MAX11129, MAX11130, MAX11131, MAX11132: Typical Application Circuit Enlarge+

Key Features

  • Scan Modes, Internal Averaging, and Internal Clock
  • 16-Entry First-In-First-Out (FIFO)
  • SampleSet: User-Defined Channel Sequence with Maximum Length of 256
  • Analog Multiplexer with True Differential Track/Hold
    • 16-/8-Channel Single-Ended
    • 8-/4-Channel Fully Differential Pairs
    • 15-/8-Channel Pseudo-Differential Relative to a Common Input
  • Two Software-Selectable Bipolar Input Ranges: ±VREF/2, ±VREF
  • Flexible Input Configuration Across All Channels
  • High Accuracy
    • ±1 LSB INL, ±1 LSB DNL, No Missing Codes Over Temperature Range
  • 70dB SINAD Guaranteed at 500kHz Input Frequency
  • 1.5V to 3.6V Wide Range I/O Supply
    • Allows the Serial Interface to Connect Directly to 1.8V, 2.5V, or 3.3V Digital Systems
  • 2.35V to 3.6V Supply Voltage
  • Longer Battery Life for Portable Applications
    • Low Power
    • 15.2mW at 3Msps with 3V Supplies
    • 2µA Full-Shutdown Current
  • External Differential Reference (1V to VDD)
  • 48MHz, 3-Wire SPI-/QSPI-/MICROWIRE-/DSP-Compatible Serial Interface
  • Wide -40°C to +125°C Operation
  • Space-Saving, 28-Pin, 5mm x 5mm TQFN Packages
  • 3Msps Conversion Rate, No Pipeline Delay
  • 12-/10-Bit Resolution


  • Battery-Powered Instruments
  • High-Speed Closed-Loop Systems
  • High-Speed Data Acquisition Systems
  • Industrial Control Systems
  • Medical Instrumentation
  • Portable Systems

See parametric specs for Precision ADCs (< 5Msps) (434)

Part NumberResolution
Input ChannelsConv. Rate
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
External VREF
Unipolar VIN
Bipolar VIN
ADCmaxminmaxmaxmaxSee Notes
MAX11129 10163000SARSPIBoth13.63.63.661.5-860.4
$6.25 @1k
MAX11131 1216SPI72.3-881
$8.66 @1k
MAX11132 128
$7.30 @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.

MAX11131EVKIT: Evaluation Kit for the MAX11131

Technical Documents

Tutorial 2094 A Simple ADC Comparison Matrix
Request Reliability Report for: MAX11131 
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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Related Resources

Type ID Title
Tutorial 2094 A Simple ADC Comparison Matrix
Type ID Title
Evaluation Board7781MAX11131EVKIT Evaluation Kit for the MAX11131
Evaluation Board10468MAX11131BOB MAX11131 Breakout Board