Overview
The AD5421CREZ-RL7, 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 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 | ppm/°C | Typical | ||
| Quiescent Current | 300 μA | μA | Maximum | ||
| Loop Voltage Range | 5.5 V | 52 V | V | ||
| Temperature Range | -40°C | +105°C | °C | ||
| Output Voltage Regulator | 1.8 V | 12 V | V | See Table 10 |
Key Features
- 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 with TC: 4 ppm/°C maximum.
- Selectable regulated voltage output.
- Compatible with HART FSK protocol communication circuitry without performance degradation.
- High speed serial interface capable of operating at 30 MHz.
Applications
- Industrial process control.
- 4 mA to 20 mA loop-powered transmitters.
- Smart transmitters.
- HART network connectivity.
Q & A
- What is the primary function of the AD5421CREZ-RL7?
The AD5421CREZ-RL7 is a loop-powered, 4 mA to 20 mA digital-to-analog converter (DAC) designed for smart transmitter applications. - What is the resolution of the AD5421CREZ-RL7?
The resolution is 16 bits. - What is the total unadjusted error (TUE) of the AD5421CREZ-RL7?
The TUE is ±0.126% of full-scale range (FSR) for the C grade. - What is the output temperature coefficient (TC) of the AD5421CREZ-RL7?
The output TC is typically 3 ppm/°C. - What is the quiescent current of the AD5421CREZ-RL7?
The quiescent current is a maximum of 300 μA. - What is the loop voltage range of the AD5421CREZ-RL7?
The loop voltage range is from 5.5 V to 52 V. - What is the temperature range of the AD5421CREZ-RL7?
The temperature range is from -40°C to +105°C. - Is the AD5421CREZ-RL7 compatible with HART protocol?
Yes, it is compatible with HART FSK protocol communication circuitry without degradation in specified performance. - What is the maximum speed of the serial interface of the AD5421CREZ-RL7?
The serial interface can operate at up to 30 MHz. - What types of packages are available for the AD5421CREZ-RL7?
The AD5421CREZ-RL7 is available in 28-lead TSSOP and 32-lead LFCSP packages.
