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Four-Channel 12-Bit Configurable Analog Output with Integrated Voltage Reference

A Software-Configurable Four-Channel Analog Output Device that Drives a Voltage or Current Output on Each Channel.

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主要特征

应用/用途

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主要特征

  • Configurable Outputs
    • Each Output Individually Configurable
    • Internal Comparator to Allow Calculating Load Impedance for Voltage-Mode or Current-Mode
    • Voltage Mode is 0V to 10.5V Linear Range with 12.5V Overrange for Loads from 1kΩ to 1MΩ
    • Current Mode is 0mA to 21mA Linear Range with 25mA Overrange for Loads from 0Ω to 750Ω
  • System Accuracy
    • V/I Output Resolution is 12-Bits
    • Factory Calibrated for Gain and Offset Error within ± 0.2% at +25°C
    • V/I Total Unadjusted Error Less Than ± 1% from -40°C to +85°C
  • Robust with Integrated Diagnostics
    • ±42VP-P Protection for Output Drivers
    • ±1kV Surge Protection with 4.99kΩ Series Resistors at Input Pins
    • ±2.5kV HBM ESD Protection on All Pins
    • Outputs have Short-Circuit and Overvoltage Protection with External Diodes
    • Thermal Monitoring and Shutdown Protection
  • Simple and Low-Cost Interface
    • Up to 30MHz SPI Serial Interface with Optional 8-Bit CRC
    • Daisy-Chain Mode to Reduce System Cost
    • VDD = 2.7V to 5.5V for Easy Interface to the Microcontroller
    • High Voltage Output Supplies:
      • HVDD: +8V to +24V
      • HVSS: -2V to 0V
  • Robust Performance in a Compact Package
    • -40°C to 85°C Operating Temperature Range
    • 56-pin TQFN, 8mm x 8mm

应用/用途

  • Building Automation Analog Outputs
  • Configurable Analog Output Cards
  • Factory Automation Analog Outputs
  • Process Automation
  • Programmable Logic Controllers

描述

The MAX22007 is a software-configurable four-channel analog output device that drives a voltage or current output on each channel. All outputs are protected to ±42VP-P for high-voltage supply of HVDD = 8V to 20V and HVSS = -2V to 0V.

Each output channel of the MAX22007 features a 12-bit DAC with fast settling time using a shared internal voltage reference. The device offers low-offset, high-voltage amplifiers to condition the signal from low-voltage DAC outputs to high-voltage or current outputs. If one output is miswired, all other outputs remain unaffected and function normally. For each channel, an internal comparator can be used to determine the load impedance and allows the microcontroller to intelligently select for voltage or current output mode. All outputs are kept safe by integrated current protection for functional and thermal robustness. The MAX22007 also includes a thermal shutdown circuit that protects the device when the junction temperature exceeds 165°C (typ).

The MAX22007 communicates with a microcontroller using a SPI interface at clock rates up to 30MHz with an optional eight-bit CRC for improved data integrity. Eight GPIOs can be used to interface and control other resources in the application circuit. The MAX22007 operates from a 2.7V to 5.5V VDD low-voltage supply and an 8V to 24V HVDD positive high-voltage supply. The negative voltage supply HVSS can be set between -2V and 0V.

The MAX22007 is available in an 8mm x 8mm 56-pin TQFN package and operates over the -40°C to +85°C temperature range with 2.5kV HBM ESD protection on all pins.

简化框图

MAX22007: Functional Diagram MAX22007: Functional Diagram Zoom icon

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