AD5421BCPZ-REEL7

AD5421BCPZ-REEL7 is a complete, loop-powered, 4mA to 20mA digital-to-analogue converter (DAC) designed to meet the needs of smart transmitter manufacturers in the industrial control industry. It includes a regulated voltage output that is used to power itself and other devices in the transmitter. This regulator provides a regulated 1.8V to 12V output voltage. It also contains 1.22V and 2.5V references, thus eliminating the need for a discrete regulator and voltage reference. It 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 30MHz and allows for simple connection to commonly used microprocessors and microcontrollers via a SPI-compatible, 3-wire interface. It is used in applications such as industrial process control, 4mA to 20mA loop-powered transmitters, smart transmitters, and HART network connectivity.

• 16-bit resolution and monotonicity, on-chip fault alerts via FAULT pin or alarm current
• Flexible SPI-compatible serial digital interface with Schmitt triggered inputs
• Automatic readback of fault register on each write cycle, slew rate control function
• Gain and offset adjust registers, selectable regulated voltage output
• Total unadjusted error is ±0.011% FSR typical at (TA = 25°C)
• Relative accuracy is ±0.006% FSR typical at (loop voltage = 24V; REFIN = 2.5V)
• Quiescent current is 260µA typical at (loop voltage = 24V; REFIN = 2.5V)
• Upscale alarm current is 22.83mA maximum at (loop voltage = 24V; REFIN = 2.5V)
• Downscale alarm current is 3.21mA maximum at (loop voltage = 24V; REFIN = 2.5V)
• Operating temperature range from -40°C to +105°C, 32-lead LFCSP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party