16-Bit, Serial Input, Loop-Powered, 4mA to 20mA DAC
The AD5421 includes a regulated voltage output that is used to power itself and other devices in the transmitter. This regulator provides a regulated 1.8 V to 12 V output voltage. The AD5421 also contains 1.22 V and 2.5 V references, thus eliminating the need for a discrete regulator and voltage reference.
The AD5421 can be used with standard HART® FSK protocol communication circuitry without any degradation in specified performance. The high speed serial interface is capable of opera-ting at 30 MHz and allows for simple connection to commonly used microprocessors and microcontrollers via a SPI-compatible, 3-wire interface.
The AD5421 is guaranteed monotonic to 16 bits. It provides 0.0015% integral nonlinearity, 0.0012% offset error, and 0.0006% gain error under typical conditions.
The AD5421 is available in a 28-lead TSSOP and a 32-lead LFCSP specified over the extended industrial temperature range of −40°C to +105°C.
- Industrial Process Control
- 4mA to 20mA loop-powered transmitters
- Smart transmitters
- HART network connectivity
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.
The SDP Controller board is a separate list item in the ordering guide below (EVAL-SDP-CB1Z). If you have not previously purchased an SDP Controller board, please do so to ensure a full evaluation setup.
The Eval-AD5421SDZ board only operates with the SDP-B development board.
Recommended Digital Isolators
- For isolated USB designs in healthcare and industrial control , we recommend the ADUM4160 .
- For digital isolators with integrated isolated power , we recommend the ADUM5401, ADUM5402 or the ADUM5403 .
- For cost sensitive designs , we recommend the ADUM7440, ADUM7441 or the ADUM7442 .
- For process control applications , we recommend the ADUM1400, ADUM1401, ADUM1200 or the ADUM1201 .
Recommended Low Power Hart Modem
Solutions Bulletins & Brochures
Digital to Analog Converters ICs Solutions Bulletin
Design Trade-Offs for Loop-Powered Transmitters
By Derrick Hartmann Applications Engineer, Analog Devices, Inc.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.