资 源 简 介
The AD5750/AD5750-1/AD5750-2 are single-channel， low cost， precision voltage/current output drivers with hardware- or software-programmable output ranges. The software ranges are configured via an SPI-/MICROWIRE™-compaTIble serial interface. The AD5750/AD5750-1/AD5750-2 target applicaTIons in PLC and industrial process control. The analog input to the AD5750/ AD5750-1/AD5750-2 is provided from a low voltage， single-supply digital-to-analog converter （DAC） and is internally condiTIoned to provide the desired output current/voltage range. Analog input ranges available are 0 V to 2.5 V （AD5750-1/AD5750-2） or 0 V to 4.096 V （AD5750）。 The output current range is programmable across five current ranges： 4 mA to 20 mA， 0 mA to 20 mA， 0 mA to 24 mA， ±20 mA， and ±24 mA. An overrange of 2% is available on the unipolar current ranges. Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V， 0 V to 10 V， ±5 V， or ±10 V output ranges. An overrange of 20% is available on the voltage ranges. Analog outputs are short-circuit and open-circuit protected and can drive capaciTIve loads of 1 µF and inductive loads of 0.1 H. The devices are specified to operate with a power supply range from ±12 V to ±24 V. Output loop compliance is 0 V to AVDD − 2.75 V. The flexible serial interface is SPI and MICROWIRE compatible and can operate in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC feature using CRC-8 error checking， useful in industrial environments where data communication corruption can occur. The devices also include a power-on-reset function， ensuring that the devices power up in a known state （0 V or tristate）， and an asynchronous CLEAR pin that sets the outputs to a zero scale/midscale voltage output or the low end of the selected current range. The HW SELECT pin is used to configure the parts for hardware or software mode on power-up.
