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AD5421

Analog Devices
Part Number AD5421
Manufacturer Analog Devices
Description 4mA-to-20mA DAC
Published Oct 16, 2010
Detailed Description Data Sheet 16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC AD5421 FEATURES GENERAL DESCRIPTION 16-bit resoluti...
Datasheet PDF File AD5421 PDF File

AD5421
AD5421


Overview
Data Sheet 16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC AD5421 FEATURES GENERAL DESCRIPTION 16-bit resolution and monotonicity Pin selectable NAMUR-compliant ranges 4 mA to 20 mA 3.
8 mA to 21 mA 3.
2 mA to 24 mA NAMUR-compliant alarm currents Downscale alarm current = 3.
2 mA Upscale alarm current = 22.
8 mA/24 mA Total unadjusted error (TUE): 0.
05% maximum INL error: 0.
0035% FSR maximum Output TC: 3 ppm/°C typical Quiescent current: 300 μA maximum Flexible SPI-compatible serial digital interface with Schmitt triggered inputs On-chip fault alerts via FAULT pin or alarm current Automatic readback of fault register on each write cycle Slew rate control function Gain and offset adjust registers On-chip reference TC: 4 ppm/°C maximum Selectable regulated voltage output Loop voltage range: 5.
5 V to 52 V Temperature range: −40°C to +105°C TSSOP and LFCSP packages APPLICATIONS Industrial process control 4 mA to 20 mA loop-powered transmitters Smart transmitters HART network connectivity The AD5421 is a complete, loop-powered, 4 mA to 20 mA digital-to-analog converter (DAC) designed to meet the needs of smart transmitter manufacturers in the industrial control industry.
The DAC provides a high precision, fully integrated, low cost solution in compact TSSOP and LFCSP packages.
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 Highway Addressable Remote Transducer (HART®) FSK protocol communication circuitry without any degradation in specified performance.
The high speed serial interface is capable of operating 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 mono...


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