Overview
The AD5421BCPZ-REEL7, 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 includes a regulated voltage output to power itself and other devices in the transmitter, along with on-chip references and fault alert mechanisms, making it an ideal choice for industrial process control and smart transmitter applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Output Current Range | 4 mA | 20 mA | |||
| Total Unadjusted Error (TUE) | 0.05% | ||||
| Integral Nonlinearity (INL) | 0.0035% FSR | ||||
| Output Temperature Coefficient (TC) | 3 ppm/°C | Typical | |||
| Quiescent Current | 260 µA | 300 µA | Maximum at 25°C | ||
| Loop Voltage Range | 5.5 V | 52 V | |||
| Temperature Range | -40°C | +105°C | |||
| Package Type | TSSOP-28, LFCSP-32 | ||||
| Serial Interface Speed | 30 MHz | High speed serial interface |
Key Features
- Fully integrated, loop-powered 4 mA to 20 mA DAC.
- High precision with 0.0015% integral nonlinearity, 0.0012% offset error, and 0.0006% gain error under typical conditions.
- 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 a temperature coefficient of 4 ppm/°C maximum.
- Selectable regulated voltage output from 1.8 V to 12 V.
- Compatibility with HART FSK protocol communication circuitry.
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 AD5421BCPZ-REEL7? The AD5421BCPZ-REEL7 is a loop-powered, 4 mA to 20 mA digital-to-analog converter (DAC) designed for smart transmitter applications.
- What are the key precision specifications of the AD5421BCPZ-REEL7? It has 0.0015% integral nonlinearity, 0.0012% offset error, and 0.0006% gain error under typical conditions.
- What is the temperature range of the AD5421BCPZ-REEL7? The temperature range is from -40°C to +105°C.
- What types of packages are available for the AD5421BCPZ-REEL7? It is available in TSSOP-28 and LFCSP-32 packages.
- Does the AD5421BCPZ-REEL7 support HART protocol communication? Yes, it is compatible with HART FSK protocol communication circuitry without any degradation in specified performance.
- What is the range of the regulated voltage output of the AD5421BCPZ-REEL7? The regulated voltage output can be selected from 1.8 V to 12 V.
- How does the AD5421BCPZ-REEL7 handle fault alerts? It provides on-chip fault alerts via the FAULT pin or alarm current and automatic readback of the fault register on each write cycle.
- What is the maximum speed of the serial interface of the AD5421BCPZ-REEL7? The high speed serial interface can operate at up to 30 MHz.
- What are some of the key applications of the AD5421BCPZ-REEL7? It is used in industrial process control, 4 mA to 20 mA loop-powered transmitters, smart transmitters, and HART network connectivity.
- What is the quiescent current of the AD5421BCPZ-REEL7? The quiescent current is 260 µA to 300 µA maximum.
