AD5421 Datasheet PDF

Part Number : AD5421

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

Manufacturers : Analog Devices

Pinouts :

AD5421 datasheet

Description :

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 indust r y. 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.

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 cyc
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

Industrial process control
4 mA to 20 mA loop-powered transmitters
Smart transmitters
HART network connectivity

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AD5421 pdf

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