24-Bit, 6-Channel, 16ksps, 6.2nV/√Hz PGA, Delta-Sigma ADC with I2C Interface

24-Bit Delta-Sigma ADC Offers the most integrated solution for Force Sense

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The MAX11261 is a 6-channel, 24-bit delta-sigma ADC that achieves exceptional performance while consuming very low power. Sample rates up to 16ksps allow precision DC measurements. The device also features a 64-entry, on-chip FIFO to offload the host processor. The MAX11261 communicates through an I2C-compatible serial interface and is available in a small, wafer-level package (WLP).

The MAX11261 offers a 6.2nV/√Hz noise programmable gain amplifier (PGA) with gain settings from 1x to 128x. The integrated PGA provides isolation of the signal inputs from the switched capacitor sampling network. The PGA also enables the MAX11261 to interface directly with high-impedance sources without compromising available dynamic range.

The MAX11261 operates from a single 2.7V to 3.6V analog supply. The digital supply range is 1.7V to 2.0V (internal LDO off) and 2.0V to 3.6V (internal LDO on) enabling communication with 1.8V, 2.5V, 3V, or 3.3V logic.
MAX11261: Functional Diagram MAX11261: Functional Diagram Enlarge+

Key Features

  • Analog Supply
    • 2.7V to 3.6V
  • Digital Supply
    • Internal LDO Disabled—1.7V to 2.0V
    • Internal LDO Enabled—2.0V to 3.6V
  • 3ppm INL (typ)
  • PGA
    • Gains of 1, 2, 4, 8, 16, 32, 64, 128
    • Low-Noise Mode, 6.2nV/√Hz Noise
    • Low-Power Mode, 10nV/√Hz Noise
  • Input-Referred Noise
    • PGA Low-Noise Mode, Gain of 64 at 1ksps Continuous, 0.15μVRMS
  • Fully Differential Signal and Reference Inputs
  • Internal System Clock of 8.192MHz
  • I2C-Compatible Serial Interface
  • Supports Standard, Fast-Mode, and Fast-Mode Plus I2C Specifications
  • 64-Entry On-Chip FIFO
  • Hardware Interrupt for Input Monitoring and FIFO Usage
  • On-Demand Self and System Gain and Offset Calibration
  • User-Programmable Offset and Gain Registers
  • Two Power-Down Modes (SLEEP and STANDBY)
  • Low Power Dissipation
  • ESD Rating: ±2.5kV (HBM), 750V (CDM)
  • -40°C to +85°C Operating Temperature Range
  • Wafer-Level Package (WLP) (6 x 6 Bump, 0.4mm Pitch, 2.838mm x 2.838mm x 0.5mm)


  • Battery-Powered Instrumentation
  • Medical Equipment
  • Pressure Sensors
  • Wearable Electronics
  • 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
ADCmaxminmaxSee Notes
MAX11261 24616Sigma-DeltaI2CBoth1.53.6
$5.36 @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.

MAX11261SYS1: Evaluation Kit for the MAX11261

Tools & Models

  • MAX11261 IBIS Model
  • Request Reliability Report for: MAX11261 
    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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