四路16位串行输入4mA到20mA和电压输出DAC动态功率控制HART连接AD5755-1数据表

　　The AD5755-1 is a quad， voltage and current output digital-toanalog converter （DAC） that operates with a power supply range from −26.4 V to +33 V. On-chip dynamic power control minimizes package power dissipation in current mode. This is achieved by regulating the voltage on the output driver from 7.4 V to 29.5 V using a dc-to-dc boost converter optimized for minimum on-chip power dissipation. Each channel has a corresponding CHART pin so that HART signals can be coupled onto the current output of the AD5755-1. The device uses a versatile 3-wire serial interface that operates at clock rates of up to 30 MHz and is compatible with standard SPI， QSPI™， MICROWIRE™， DSP， and microcontroller interface standards. The interface also features optional CRC-8 packet error checking， as well as a watchdog timer that monitors activity on the interface.