16-Bit, 500ksps, ±5V SAR ADC with Internal Reference in TDFN

Industry's Smallest, True Bipolar ±5V, 16-Bit ADCs


The MAX11166 16-bit, 500ksps, SAR ADC offers excellent AC and DC performance with true bipolar input range, small size, and internal reference. The MAX11166 measures a ±5V (10VP-P) input range while operating from a single 5V supply. A patented charge-pump architecture allows direct sampling of high-impedance sources. The MAX11166 integrates an optional internal reference and buffer, saving additional cost and space.

These ADCs achieve 92.9dB SNR and -103dB THD. The MAX11166 guarantees 16-bit no-missing codes and ±0.4 LSB INL (typ).

The MAX11166 communicates using an SPI-compatible serial interface at 2.5V, 3V, 3.3V, or 5V logic. The serial interface can be used to daisy-chain multiple ADCs in parallel for multichannel applications and provides a busy indicator option for simplified system synchronization and timing.

The MAX11166 is offered in 12-pin, 3mm x 3mm, TDFN package and is specified over the -40°C to +85°C temperature range. 
MAX11166, MAX11167: Functional Diagram MAX11166, MAX11167: Functional Diagram Enlarge+

Key Features

  • High DC/AC Accuracy Improves Measurement Quality
    • 16-Bit Resolution with No Missing Codes
    • 500ksps Throughput Rates without Pipeline Delay/Latency
    • 92.9dB SNR and -103dB THD at 10kHz
    • 0.5 LSBRMS Transition Noise
    • ±0.2 LSB DNL (typ) and ±0.4 LSB INL (typ)
  • Highly Integrated ADC Saves Cost and Space
    • ±6ppm/°C Internal Reference
    • Internal Reference Buffer
    • ±5V Bipolar Analog Input Range
  • Wide Supply Range and Low Power Simplify Power-Supply Design
    • 5V Analog Supply
    • 2.3V to 5V Digital Supply
    • 25.5mW Power Consumption at 500ksps
    • 10µA in Shutdown Mode
  • Multi-Industry Standard Serial Interface and Small Package Reduce Size
    • SPI/QSPI/MICROWIRE®/DSP-Compatible Serial Interface
    • 3mm x 3mm Tiny 12-Pin TDFN Package


  • Automatic Test Equipment
  • Data Acquisition Systems
  • Industrial Control Systems/Process Control
  • Medical Instrumentation
Part Number Resolution
Input Chan. Conv. Rate
ADC Architecture Data Bus Diff/S.E. Input Internal VREF
External VREF
External VREF
Bipolar VIN
Package/Pins Budgetary
ADC max nominal min max max See Notes
MAX11166  16 1 500 SAR
DSP-Compatible Serial
Both 4.096 2.5 4.25 5 93 -105 1.5
$14.30 @1k
See All Precision ADCs (< 5Msps) (470)
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.

MAX11166EVSYS: Evaluation System for the MAX11166

Technical Documents

User Guide 5885 MAXREFDES32# ZedBoard Quick Start Guide
User Guide 5866 MAXREFDES71# ZedBoard Quick Start Guide

Quality and Environmental Data

Product Reliability Reports: MAX11166.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Topmark Coding MAX11166

Tools & Models

MAX11166 IBIS Model

Related Resources

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