Overview
The AD5421CREZ-RL, produced by Analog Devices Inc., 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. This 16-bit DAC provides a high precision, fully integrated, and low-cost solution in compact TSSOP and LFCSP packages. It is optimized for use in industrial process control, 4 mA to 20 mA loop-powered transmitters, and smart transmitters with HART network connectivity.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | - | - | 16 Bits | - | - |
| Total Unadjusted Error (TUE) | -0.126% | - | +0.126% | FSR | C grade, TMIN to TMAX |
| Integral Nonlinearity (INL) | -0.0035% | - | +0.0035% | FSR | C grade, TA = 25°C |
| Output Temperature Coefficient (TC) | - | 3 ppm/°C | - | - | Typical |
| Quiescent Current | - | - | 300 μA | - | Maximum |
| Loop Voltage Range | 5.5 V | - | 52 V | - | - |
| Temperature Range | -40°C | - | +105°C | - | - |
| Package | - | - | 28-lead TSSOP, 32-lead LFCSP | - | - |
Key Features
- Fully integrated, loop-powered 4 mA to 20 mA DAC with high precision and low cost.
- 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 and gain and offset adjust registers.
- On-chip reference with TC: 4 ppm/°C maximum.
- Selectable regulated voltage output (1.8 V to 12 V).
- Compatible with HART FSK protocol communication circuitry without performance degradation.
Applications
- Industrial process control.
- 4 mA to 20 mA loop-powered transmitters.
- Smart transmitters with HART network connectivity.
Q & A
- What is the resolution of the AD5421CREZ-RL DAC?
The AD5421CREZ-RL has a resolution of 16 bits. - What is the total unadjusted error (TUE) of the AD5421CREZ-RL?
The TUE is ±0.126% FSR for the C grade over the temperature range. - What is the output temperature coefficient of the AD5421CREZ-RL?
The output temperature coefficient is typically 3 ppm/°C. - What is the quiescent current of the AD5421CREZ-RL?
The quiescent current is a maximum of 300 μA. - What is the loop voltage range of the AD5421CREZ-RL?
The loop voltage range is from 5.5 V to 52 V. - What are the available packages for the AD5421CREZ-RL?
The AD5421CREZ-RL is available in 28-lead TSSOP and 32-lead LFCSP packages. - Is the AD5421CREZ-RL compatible with HART protocol?
Yes, it is compatible with HART FSK protocol communication circuitry without any degradation in specified performance. - What is the temperature range of the AD5421CREZ-RL?
The temperature range is from -40°C to +105°C. - Does the AD5421CREZ-RL have on-chip fault alerts?
Yes, it has on-chip fault alerts via the FAULT pin or alarm current. - Can the AD5421CREZ-RL be used with standard microprocessors and microcontrollers?
Yes, it has a high-speed serial interface capable of operating at 30 MHz and is SPI-compatible, allowing simple connection to commonly used microprocessors and microcontrollers).
