16-Bit, 1Msps, Low-Power, Fully Differential SAR ADC

16-Bit, Low-Power, SAR ADC with Reference Buffer

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The MAX11900 is a 16-bit, 1Msps, single-channel, fully differential SAR ADC with internal reference buffers. The MAX11900 provides excellent static and dynamic performance with best-in-class power consumption that directly scales with throughput. The device has a unipolar differential ±VREF input range. Supplies include a 3.3V supply for the reference buffers, a 1.8V analog supply, a 1.8V digital supply, and a 1.5V to 3.6V digital interface supply.

This ADC achieves 95.6dB SNR and -115dB THD, guarantees 16-bit resolution with no-missing codes and 0.5 LSB INL (max).

The MAX11900 communicates data using a SPI-compatible serial interface. The MAX11900 is offered in a 20-pin, 4mm x 4mm, TQFN package and is specified over the -40°C to +85°C operating temperature range.

MAX11900: Functional Diagram MAX11900: Functional Diagram Enlarge+

Key Features

  • High DC/AC Accuracy Improves Measurement Quality
    • 16-Bit Resolution with No Missing Codes
    • 1Msps Throughput Rates Without Pipeline Delay/Latency
    • 95.6dB SNR and -115dB THD at 10kHz
    • 0.4 LSBRMS Transition Noise
    • ±0.25 LSB DNL (max) and ±0.5 LSB INL (max)
  • Highly Integrated ADC Saves Cost and Space
    • Internal Reference Buffer
  • Wide Supply Range and Low Power Simplify Power-Supply Design
    • 1.8V Analog Supply
    • 1.5V to 3.6V Digital Supply
    • 6.7mW Power Consumption at 1Msps
    • 6.7µW Power Consumption at 1ksps
    • 1µA in Shutdown Mode
  • Multi-Industry Standard Serial Interface and Small Package Reduces Size
    • SPI/QSPI™/MICROWIRE®/DSP-Compatible Serial Interface
    • 4mm x 4mm 20-Pin TQFN Package


  • Automatic Test Equipment
  • Battery-Powered Equipment
  • Data Acquisition Systems
  • Medical Instrumentation
  • Process Control and Industrial Automation
  • Telecommunications
  • Test and Measurement

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

Part NumberResolution
Input ChannelsConv. Rate
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
Unipolar VIN
Bipolar VIN
ADCmaxmaxmaxmaxSee Notes
MAX11900 1611000SAR
DSP-Compatible Serial
Diff. Only3.63.63.696-1230.5
$4.78 @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.

MAX11905EVKIT: Evaluation Kit for the MAX11900, MAX11901, MAX11902, MAX11903, MAX11904, and MAX11905
Product Reliability Reports: MAX11900.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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