AD5421
PRODUCTION16-Bit, Serial Input, Loop-Powered, 4mA to 20mA DAC
- Part Models
- 8
- 1ku List Price
- Starting From $5.97
Part Details
- 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
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 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
- 4 mA to 20 mA loop-powered transmitters
- Smart transmitters
- HART network connectivity
Documentation
Data Sheet 1
User Guide 1
Application Note 3
Technical Articles 4
Frequently Asked Question 1
Video 1
Circuit Note 2
Solutions Bulletin & Brochure 1
Device Drivers 2
Analog Dialogue 1
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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD5421ACPZ-REEL7 | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| AD5421BCPZ-REEL7 | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| AD5421BREZ | 28-Lead TSSOP w/ EP | ||
| AD5421BREZ-REEL | 28-Lead TSSOP w/ EP | ||
| AD5421BREZ-REEL7 | 28-Lead TSSOP w/ EP | ||
| AD5421CREZ | 28-Lead TSSOP w/ EP | ||
| AD5421CREZ-RL | 28-Lead TSSOP w/ EP | ||
| AD5421CREZ-RL7 | 28-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 3, 2017 - 16_0230 Assembly Transfer of Select LFCSP Products to ASE Korea |
||
| AD5421ACPZ-REEL7 | PRODUCTION | |
| AD5421BCPZ-REEL7 | PRODUCTION | |
|
May 11, 2014 - 13_0231 Assembly Transfer of Select 4x4 and 5x5mm LFCSP Products to STATS ChipPAC China. |
||
| AD5421ACPZ-REEL7 | PRODUCTION | |
| AD5421BCPZ-REEL7 | PRODUCTION | |
|
Dec 19, 2011 - 11_0205 AD5421 Minor Metal Mask Edit |
||
| AD5421ACPZ-REEL7 | PRODUCTION | |
| AD5421BCPZ-REEL7 | PRODUCTION | |
| AD5421BREZ | PRODUCTION | |
| AD5421BREZ-REEL | PRODUCTION | |
| AD5421BREZ-REEL7 | PRODUCTION | |
| AD5421CREZ | PRODUCTION | |
| AD5421CREZ-RL | PRODUCTION | |
| AD5421CREZ-RL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
FPGA/HDL 2
Device Drivers 2
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| ADC/DAC Combo Converters 2 | ||
| AD5700 | PRODUCTION | Low Power HART Modem |
| AD5700-1 | PRODUCTION | Low Power HART Modem with Precision Internal Oscillator |
| Interface Transceivers & Isolators 11 | ||
| ADUM5401 | PRODUCTION | Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (3/1 channel directionality) |
| ADUM5402 | PRODUCTION | Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (2/2 channel directionality) |
| ADUM5403 | PRODUCTION | Quad-Channel, 2.5 kV Isolators with Integrated DC-to-DC Converter (1/3 channel directionality) |
| ADUM1400 | PRODUCTION | Quad-Channel Digital Isolator (4/0 Channel Directionality) |
| ADUM1401 | PRODUCTION | Quad-Channel Digital Isolator (3/1 Channel Directionality) |
| ADUM1200 | PRODUCTION | Dual-Channel Digital Isolator (2/0 Channel Directionality) |
| ADUM1201 | PRODUCTION | Dual-Channel Digital Isolator (1/1 Channel Directionality) |
| ADUM7440 | PRODUCTION | 1 kV RMS Quad-Channel Digital Isolator |
| ADUM7441 | PRODUCTION | 1 kV RMS Quad-Channel Digital Isolator |
| ADUM7442 | PRODUCTION | 1 kV RMS Quad-Channel Digital Isolator |
| ADUM4160 | PRODUCTION | Full/Low Speed USB Digital Isolator |
| Voltage References 3 | ||
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| ADR441 | PRODUCTION | Ultralow Noise, LDO XFET® 2.5V Voltage Reference w/Current Sink and Source |
Tools & Simulations
Precision DAC Error Budget Tool
The Precision DAC Error Budget Tool is a web application that calculates the DC Accuracy of precision DAC signal chains. It shows how the static errors accumulate throughout your signal chain to quickly evaluate the design tradeoffs. Calculations include the DC errors introduced by Voltage References, Operation Amplifiers and Precision DACs.
Open ToolAD5421 IBIS Model 1
Evaluation Kits
AD5421 Evaluation Board
Resources
Software
Reference Designs
Complete 4 mA to 20 mA Loop Powered Field Instrument with HART Interface
Part Used
Resources
Design & Integration Tools
Isolated 4 mA to 20 mA/HART Temperature and Pressure Industrial Transmitter Using a Low Power, Precision, 24-Bit, Sigma-Delta ADC
Part Used
Design & Integration Tools
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