AD5421 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD5421
Manufacturer

ADI
ChipWorker Part#

CW409563138
Description

16Bit, Serial Input, Loop-Powered, 4mA to 20mA DAC
Documentation

Datasheet

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AD5421 Specifications

Attribute	Attribute Value

Part Number	AD5421
Manufacturer	ADI
ChipWorker Part#	CW409563138
Documentation	Datasheet
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Product Lifecycle Status	Recommended for New Designs

Product Description

Product Details
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 a compact TSSOP package 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 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.
**Applications**
Industrial Process Control
4mA to 20mA loop-powered transmitters
Smart transmitters
HART network connectivity
### Features and Benefits
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 =
22.8mA/24mA
Total unadjusted error (TUE): 0.05% maximum
INL error: 0.0035% FSR maximum
Output TC: 3 ppm/°C typical
Quiescent current: 300 μA maximum
See datasheet for additional features

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