Overview
The AD5420AREZ-REEL7 is a high-performance, single-channel, serial input, current output digital-to-analog converter (DAC) produced by Analog Devices Inc. This device is designed to meet the stringent requirements of industrial process control applications. It offers a 16-bit resolution, ensuring precise control over current outputs ranging from 4 mA to 20 mA, and can also provide a voltage output with an external resistor. The device operates over a wide supply range of 10.8 V to 40 V, making it versatile for various industrial power supplies.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Resolution | 16 bits | Precision of the DAC output |
| Current Output Ranges | 4 mA to 20 mA, 0 mA to 20 mA, 0 mA to 24 mA | Flexible output ranges to suit different applications |
| Total Unadjusted Error (TUE) | ±0.01% FSR typical | Accuracy of the DAC output |
| Output Drift | ±3 ppm/°C typical | Temperature stability of the output current |
| Power Supply Range | 10.8 V to 40 V | Operating voltage range of the device |
| Temperature Range | −40°C to +85°C | Operating temperature range of the device |
| Settling Time | 40 µs (16 mA step, to 0.1% FSR) | Time for the output to settle to the desired value |
| Package | 24-lead TSSOP | Physical packaging of the device |
| Data Interface | SPI, DSP | Digital interface for communication with the device |
| Reference Type | External, Internal | Type of reference voltage used by the device |
Key Features
- High Resolution and Accuracy: 16-bit resolution with ±0.01% FSR typical total unadjusted error (TUE) and ±3 ppm/°C typical output drift.
- Flexible Output Ranges: Current output ranges of 4 mA to 20 mA, 0 mA to 20 mA, or 0 mA to 24 mA.
- On-Chip Output Fault Detection: Detection of open circuit, short circuit, overtemperature, and nonvolatile memory (NVM) errors.
- Integrated Precision Voltage Reference: Internal reference voltage output with a typical temperature drift of 1.8 ppm/°C.
- Flexible Serial Digital Interface: SPI interface for easy integration into microcontroller-based systems.
- Hardware-Selectable Reset: Reset to either 4 mA or 20 mA for fail-safe conditions.
- Asynchronous Clear Function: Allows for immediate reset of the output current.
- Feedback/Monitoring of Output Current: Capability to monitor the output current for system diagnostics.
Applications
- Process Control: Suitable for industrial process control systems requiring precise current output control.
- Actuator Control: Used in controlling actuators in various industrial applications.
- PLC and DCS Systems: Compatible with programmable logic controllers (PLCs) and distributed control systems (DCS).
- HART Network Connectivity: Supports HART (Highway Addressable Remote Transducer) protocol for communication in industrial networks.
- Smart Transmitters: Used in smart transmitter applications where high accuracy and reliability are crucial.
Q & A
- What is the resolution of the AD5420AREZ-REEL7 DAC?
The AD5420AREZ-REEL7 has a 16-bit resolution.
- What are the current output ranges of the AD5420AREZ-REEL7?
The device offers current output ranges of 4 mA to 20 mA, 0 mA to 20 mA, and 0 mA to 24 mA.
- What is the typical total unadjusted error (TUE) of the AD5420AREZ-REEL7?
The typical TUE is ±0.01% FSR.
- What is the operating temperature range of the AD5420AREZ-REEL7?
The device operates from −40°C to +85°C.
- What type of digital interface does the AD5420AREZ-REEL7 support?
The device supports SPI and DSP digital interfaces.
- Does the AD5420AREZ-REEL7 have on-chip output fault detection?
Yes, it includes on-chip output fault detection for open circuit, short circuit, overtemperature, and NVM errors.
- What is the settling time of the AD5420AREZ-REEL7?
The settling time is 40 µs for a 16 mA step to 0.1% FSR.
- What is the package type of the AD5420AREZ-REEL7?
The device is packaged in a 24-lead TSSOP.
- Is the AD5420AREZ-REEL7 suitable for high-volume production?
Yes, it is provided on a reel (REEL7) for automated assembly processes, making it suitable for high-volume production environments.
- What are some common applications of the AD5420AREZ-REEL7?
Common applications include process control, actuator control, PLC and DCS systems, HART network connectivity, and smart transmitters.
