Features and Benefits

  • Enables More Robust and Reliable Systems
    • ±36V High-Voltage Protection for All Input Ports
    • 2kV HBM ESD Protection of All Pins
    • ±2kV Surge Protection (with External 5kΩ Resistor)
    • CRC Detection for Robust Serial Communication
    • Watchdog Timer
  • Software Configurability
    • ±12.5V Analog Input-Voltage Mode
    • ±25mA Analog Input-Current Mode Using External Sense Resistor
    • Configurable Inputs Using External Sense Resistor and Low-Cost Switches
  • Best-in-Class System Accuracy
    • 0.02% FSR at 25°C Factory Calibrated
    • 0.05% FSR over ±50°C from 25°C Factory Calibration
    • Maximum of 30nA Input Leakage
    • 5ppm/°C Internal Reference
  • Additional Features
    • Internal or External ADC Reference
    • Eight GPIO Ports
    • 48.5mW Low Power Dissipation with ±5V Supply
    • 30MHz SPI/QSPI/DSP-Compatible Serial Interface
  • Operating Temperature -40°C to +125°C
  • 7.5mm × 7mm 48-pin LGA package

Product Details

The MAX22005 is a twelve-channel industrial-grade analog input voltage-mode device that can also be configured as analog-input current-mode device using an external precision resistor per channel. It can also operate as configurable analog-input using an external precision resistor and low-cost switch per channel. Input channels can be used as twelve single-ended inputs, or six differential inputs, or up to eight multichannel configurable differential inputs. In total, the device supports up to 26 different configurations

The MAX22005 features an integrated 24-bit delta-sigma ADC that is shared between all channels. The ADC can be used with either an integrated 5ppm/°C precision reference or an external reference. Standard industrial analog input voltage ranges are converted to the ADC input voltage range using high-voltage, zero-drift input amplifiers. All input ports are robustly protected up to ±36V reverse polarity and ±1.5kV surge pulses without the need of TVS diodes.

Eight general-purpose digital I/O (GPIO) ports are available for common use, or they can be used to control external switches for configurable inputs.

The MAX22005 is factory calibrated with best-in-class system performance of less than 0.05% FSR Total-Unadjusted-Error (TUE) over temperature.

The host communicates with the MAX22005 through a high-speed 30MHz SPI bus for all configurations and information management, as well as for acquiring conversion results. An optional 8-bit CRC enhances the reliability of the SPI interface, protecting against all 8-bit bursts, as well as all double-bit errors.

The MAX22005 operates from 2.7V to 3.6V analog and digital supplies, and up to ±24V high-voltage supplies.

The MAX22005 is available in 48-pin LGA package and operates over the -40°C to +125°C industrial temperature range.


  • Programmable Logic Controllers (PLC)
  • Programmable Automation Controllers (PAC)
  • Distributed Control Systems (DCS)

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This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.