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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.

Product Details

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.

Key Features

  • 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

Applications/Uses

  • Building Automation Analog Outputs
  • Configurable Analog Output Cards
  • Factory Automation Analog Outputs
  • Process Automation
  • Programmable Logic Controllers
Parametric specs for Analog I/O
Analog Input/Output Analog Output
Interface Type SPI
Output Resolution (bits) 12
VOUT (V) (min) 0
VOUT (V) (max) 12.5
IOUT (mA) (min) 0
IOUT (mA) (max) 25
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN-CU/56
Budgetary
Price (See Notes)
$5.88 @1k
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Simplified Block Diagram

MAX22007: Functional Diagram MAX22007: Functional Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX22007 evaluation kit (EV kit) provides the hard- ware and software necessary to evaluate the MAX22007 Industrial Four-Channel Configurable Analog Output. The MAX22007 EV kit communicates with a graphical user interface (GUI) running on a PC through a USB port. The EV kit provides the on-board FT2232 USB-to-SPI bridge for SPI communication, but also allows an external SPI master to communicate with the MAX22007 through the PMOD1 connector. The onboard DC-DC converters generate necessary supply voltages, +15V for HVDD, +3.3V for VDD, and -2V for HVSS to power the MAX22007.

Multiple MAX22007 EV kit boards can be connected in daisy-chain mode using PMOD1 and PMOD2 connectors.

View Details

Features

  • Two Accessible Modes:
    • Analog Output-Voltage Mode
    • Analog Output-Current Mode
  • Supports Load Impedance Detection
  • Access to All GPIOs
  • Windows® 10-Compatible Software
  • Proven PCB Layout
  • Fully Assembled and Tested

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SIMULATION MODELS

MAX22007 IBIS Model

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Parameters

Parametric specs for Analog I/O
Analog Input/Output Analog Output
Interface Type SPI
Output Resolution (bits) 12
VOUT (V) (min) 0
VOUT (V) (max) 12.5
IOUT (mA) (min) 0
IOUT (mA) (max) 25
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN-CU/56
Budgetary
Price (See Notes)
$5.88 @1k

Key Features

  • 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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX22007: Functional Diagram MAX22007: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.