24-Bit, Single-Channel, Ultra-Low-Power, Delta Sigma ADC with 2-Wire Serial Interface

Experience the Industry's Highest ENOB ADC at < 1mW

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The MAX11201 is an ultra-low-power (< 320µA max active current), high-resolution, serial-output ADC. This device provides the highest resolution per unit power in the industry and is optimized for applications that require very high dynamic range with low power such as sensors on a 4mA to 20mA industrial control loop. The MAX11201 provides a high-accuracy internal oscillator that requires no external components.

When used with the specified data rates, the internal digital filter provides more than 100dB rejection of 50Hz or 60Hz line noise. The MAX11201 provides a simple 2-wire serial interface in the space-saving, 10-pin µMAX® package.

The MAX11201 operates over the -40°C to +85°C temperature range.

MAX11201: Functional Diagram MAX11201: Functional Diagram Enlarge+

Key Features

  • 23.3-Bit ENOB
    • 20.6-Bit Noise-Free Resolution at 13.75sps
    • 19.1-Bit Noise-Free Resolution at 120sps
  • 700nVRMS Noise ±3.6VFS Input (MAX11201B)
  • INL: 3ppm (typ), 10ppm (max)
  • No Missing Codes
  • Ultra-Low Power Dissipation
    • Operating Mode Current Drain < 320µA (max)
    • Sleep Mode Current Drain < 0.4µA
  • 2.7V to 3.6V Analog Supply Voltage Range
  • 1.7V to 3.6V Digital and I/O Supply Voltage Range
  • Fully Differential Signal and Reference Inputs
  • High-Impedance Inputs
    • Buffers on Signal Inputs
  • Programmable Internal System Clock or External Clock
    • 2.4576MHz (MAX11201A)
    • 2.25275MHz (MAX11201B)
  • > 100dB (min) 50Hz/60Hz Rejection (MAX11201B)
  • Serial 2-Wire Interface (Clock Input and Data Output)
  • On-Demand Offset and Gain Self-Calibration
  • -40°C to +85°C Operating Temperature Range
  • ±2kV ESD Protection
  • Lead(Pb)-Free and RoHS-Compliant µMAX Package


  • Battery Applications
  • Portable Instrumentation
  • Sensor Measurement (Temperature and Pressure)
  • Weigh Scales

See parametric specs for Precision ADCs (< 5Msps) (437)

Part NumberResolution
Input Chan.Conv. Rate
ADC ArchitectureData BusDiff/S.E. InputExternal VREF
External VREF
Unipolar VIN
Bipolar VIN
ADCmaxminmaxmaxmaxSee Notes
MAX11201 2410.12Sigma-DeltaSPIBoth03.63.63.610
$2.74 @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.

Technical Documents

Tutorial 4699 Overview of Sensor Signal Paths
Request Reliability Report for: MAX11201 
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 4699 Overview of Sensor Signal Paths