AD5421BREZ-REEL7
Digital to Analog Converters (DAC)
Technical Specifications
| Type | Description |
|---|---|
| Operating Temp | -40°C ~ +105°C |
| Working Voltage V | 28.75 V |
| Function | Built-in reference source;Programmable gain;Built-in temperature sensor;Over temperature protection;Under-voltage detection |
| Channels | 1.0 |
| Settling Time | 50us |
| Type | Description |
|---|---|
| Quiescent Current (Iq) | 300uA |
| Integral non - linearity | - |
| Resolution (Bits) | 16;- |
| Interface Type | SPI |
| Package / Case | HTSSOP-28 |
Product Introduction
The AD5421 is a complete, loop-powered 4 mA to 20 mA DAC designed to meet the needs of smart transmitter manufacturers in industrial control applications. As a fully integrated, high-precision, low-cost solution, the device is available in compact TSSOP and LFCSP packages.
The AD5421 incorporates an on-chip regulated output to power itself and other devices in the transmitter. This regulator provides an adjustable output voltage from 1.8 V to 12 V. The device also integrates 1.22 V and 2.5 V voltage references, eliminating the need for discrete regulators and references.
The AD5421 can be used with standard HART FSK protocol communication circuitry without affecting rated performance. The high-speed serial interface operates at up to 30 MHz and allows simple connection to popular microprocessors and microcontrollers via an SPI-compatible 3-wire interface.
The AD5421 guarantees 16-bit monotonicity. Under typical conditions, integral nonlinearity is 0.0015%, offset error is 0.0012%, and gain error is 0.0006%.
It is available in 28-lead TSSOP and 32-lead LFCSP packages, rated for the extended industrial temperature range of -40°C to +105°C.
Features
- 16-bit resolution and monotonicity
- Pin-selectable NAMUR-compatible ranges: 4 mA to 20 mA, 3.8 mA to 21 mA, 3.2 mA to 24 mA
- NAMUR-compatible alarm currents: low alarm = 3.2 mA, high alarm = 22.8 mA/24 mA
- Total unadjusted error (TUE): 0.05% (maximum)
- Integral nonlinearity (INL) error: 0.0035% FSR (maximum)
- Output temperature coefficient: 3 ppm/°C (typical)
- Quiescent current: 300 μA (maximum)
- Flexible SPI-compatible serial digital interface with Schmitt trigger inputs
- On-chip fault alarm via FAULT pin or alarm current
- Automatic fault register readback on every write cycle
- Slew rate control
- Gain and offset adjustment registers
- On-chip reference temperature coefficient: 4 ppm/°C (maximum)
- Optional regulated 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
Datasheet
Alternative Parts
Common AD5421BREZ-REEL7 alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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