Analog Devices MAX22000 Product Info

• Accuracy
  • Analog Output Voltage or Current Mode:
    • 0.02%FSR Accuracy, Room Temp
    • 0.1%FSR Accuracy, ±50°C Temp Variation
  • 5ppm/°C Internal Reference
• Flexibility
  • 6 Analog Inputs/1 Analog Output, Software Configurable for Voltage and Current Mode
  • Two Auxiliary ADC Inputs for Cold Junction Measurements
  • RTD Input Mode in 2, 3, or 4-Wire Configurations
  • Thermocouple Input Mode
  • ±12.5V Input/Output Voltage Range
  • ±25mA or ±2.5mA Output Current Range
  • ±25V, ±2.5V, ±500mV, ±250mV, and ±125mV PGA Input Voltage Ranges
  • +24V Field Supply for Current Loop
  • Optional External Reference for ADC and/or DAC
  • Six GPIOs
  • 20MHz SPI Interface
• Robustness
  • ±36V Protection on All Analog I/O Ports
  • Overcurrrent Protection
  • Thermal Shutdown
  • Undervoltage Interrupt on All High Voltage Supplies
  • CRC Detection
  • Open Detection on All Analog Inputs
  • 1kV HBM Protection on All Pins
• -40°C to +125°C Operating Temperature Range
• 9mm x 9.5mm 64-Pin LGA Package

The MAX22000 is an industrial-grade configurable analog input/output device that can be configured on-the-fly in software as a voltage input or output, or current input or output. Additional inputs are available to measure other analog signals.

The device offers an 18-bit DAC with fast settling time as well as a 24-bit delta-sigma ADC. The ADC and DAC can individually choose between an internal or an external reference. The MAX22000 supports the ADC with a low-noise programmable gain amplifier (PGA), with high-voltage and low-voltage input ranges to support RTD and thermocouple measurements. Additional auxiliary inputs are provided to measure cold junction temperatures on-board. The MAX22000 communicates through a high speed 20MHz SPI bus for all configuration and management information as well as for conversion results. An optional 8-bit CRC enhances the reliability of the SPI interface, protecting against all 8-bit bursts and double-bit errors. The MAX22000 operates from 2.7V to 3.6V analog and digital supplies and up to ±24V high-voltage supplies. The device is available in a 64-pin LGA package and operates over the -40°C to +125°C industrial temperature range.

Applications

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