AD5422

PRODUCTION

Single Channel, 16-Bit, Current Source & Voltage Output DAC, HART Connectivity

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Overview

  • 16-bit resolution and monotonicity
  • Current output ranges: 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA
  • ±0.01% FSR typical total unadjusted error (TUE)
  • ±3 ppm FSR/°C output drift
  • Voltage output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V
    • 10% overrange
    • ±0.01% FSR typical TUE
    • ±2 ppm FSR/°C output drift
  • Flexible serial digital interface
  • On-chip output fault detection
  • On-chip reference: 10 ppm/°C maximum
  • Optional regulated DVCC output
  • Asynchronous clear function
  • Power supply range
    • AVDD: 10.8 V to 40 V
    • AVSS: −26.4 V to −3 V/0 V
  • Current loop compliance voltage: AVDD – 2.5 V
  • Temperature range: −40°C to +105°C
  • TSSOP and LFCSP packages

The AD5412/AD5422 are low cost, precision, fully integrated 12-/16-bit digital-to-analog converters (DAC) offering a programmable current source and programmable voltage output designed to meet the requirements of industrial process control applications.

The output current range is programmable at 4 mA to 20 mA, 0 mA to 20 mA, or an overrange function of 0 mA to 24 mA.

The LFCSP version of this product has a CAP2 pin so that the HART signals can be coupled onto the current output of the AD5412/AD5422.

Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V output ranges; an overrange of 10% is available on all ranges.

Analog outputs are short and open-circuit protected and can drive capacitive loads of 1 μF.

The device operates with an AVDD power supply range from 10.8 V to 40 V. Current loop compliance voltage is 0 V to AVDD − 2.5 V.

The flexible serial interface is SPI- and MICROWIRE-compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications.

The device also includes a power-on-reset function, ensuring that the device powers up in a known state. The part also includes an asynchronous clear pin (CLEAR) that sets the outputs to zero-scale/midscale voltage output or the low end of the selected current range.

The total output error is typically ±0.01% in current mode and ±0.01% in voltage mode.

Applications

  • Process controls
  • Actuator controls
  • PLC
  • HART network connectivity (LFCSP package only)

AD5422
Single Channel, 16-Bit, Current Source & Voltage Output DAC, HART Connectivity
AD5412_AD5422 Functional Block Diagram AD5412-AD5422 Pin Configuration AD5412-AD5422 Pin Configuration
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Documentation

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Software Resources

Evaluation Software 1

AD5422 Evaluation Software

 


Hardware Ecosystem

Parts Product Life Cycle Description
ADC/DAC Combo Converters 2
AD5700 PRODUCTION Low Power HART Modem
AD5700-1 PRODUCTION Low Power HART Modem with Precision Internal Oscillator
Interface Transceivers & Isolators 11
ADUM7440 PRODUCTION 1 kV RMS Quad-Channel Digital Isolator
ADUM7441 PRODUCTION 1 kV RMS Quad-Channel Digital Isolator
ADUM7442 PRODUCTION 1 kV RMS Quad-Channel Digital Isolator
ADUM5401 PRODUCTION Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (3/1 channel directionality)
ADUM5402 PRODUCTION Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (2/2 channel directionality)
ADUM5403 PRODUCTION Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (1/3 channel directionality)
ADUM1400 PRODUCTION Quad-Channel Digital Isolator (4/0 Channel Directionality)
ADUM1401 PRODUCTION Quad-Channel Digital Isolator (3/1 Channel Directionality)
ADUM1200 PRODUCTION Dual-Channel Digital Isolator (2/0 Channel Directionality)
ADUM1201 PRODUCTION Dual-Channel Digital Isolator (1/1 Channel Directionality)
ADUM4160 PRODUCTION Full/Low Speed USB Digital Isolator
Voltage References 3
ADR425 PRODUCTION Ultraprecision, Low Noise, 5.00 V XFET® Voltage Reference
ADR435 PRODUCTION Ultralow Noise XFET® Voltage References with Current Sink and Source Capability
ADR445 PRODUCTION Ultralow Noise, LDO XFET® 5.0V Voltage Reference w/Current Sink and Source
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Tools & Simulations

Precision DAC Error Budget Tool

The Precision DAC Error Budget Tool is a web application that calculates the DC Accuracy of precision DAC signal chains. It shows how the static errors accumulate throughout your signal chain to quickly evaluate the design tradeoffs. Calculations include the DC errors introduced by Voltage References, Operation Amplifiers and Precision DACs.

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Evaluation Kits

eval board
EVAL-AD5422

AD5422 Evaluation Board

Product Details

The evaluation board can be used as a standalone board, with control coming from an external DSP or microcontroller, or it can be connected to a PC via USB interface. Software is provided that can be used to program the registers of the AD5422 via the USB interface to the PC.\


Please note: This Evaluation software does not run on Windows 8 or Windows 10 (USB driver is non-compliant with OS >Windows 7).

EVAL-AD5422
AD5422 Evaluation Board
EVAL-AD5422EBZANGLE-web EVAL-AD5422EBZBOTTOM-web EVAL-AD5422EBZTOP-web

Reference Designs

Functional Block Diagram
CN0321 Circuits from the lab

Fully Isolated, Single Channel Voltage and 4 mA to 20 mA Output with HART

Features and Benefits

  • Voltage and 4mA to 20mA output
  • Fully isolated
  • HART connectivity
CN0321
Fully Isolated, Single Channel Voltage and 4 mA to 20 mA Output with HART
Functional Block Diagram

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