Single-channel DAC with on-chip DPC reduces package power dissipation

Analog Devices AD5753 Single-Channel DAC runs with a power supply range from a minimum of −33V on AVSS to a maximum of +33V on AVDD1. This is achieved with a maximum operating voltage of 60V between the two rails. On-chip DPC reduces package power dissipation. This minimisation is accomplished by using buck DC-to-DC converters optimised for minimum on-chip power dissipation to regulate the voltage (VDPC+ and VDPC−). That voltage is carried to the VIOUT output driver circuitry from the ±5V to ±27V supply voltage. The CHART pin allows a HART signal to be coupled on the current output.

The device uses a versatile, four-wire, SPI that runs at clock rates of up to 50MHz. This interface is compatible with standard SPI, QSPI, DSP, MICROWIRE, and microcontroller interface standards. The interface features an optional SPI CRC and a WDT. The device provides improved diagnostic features from earlier versions of similar DACs, including output current monitoring and an integrated, 12-bit diagnostic ADC. The inclusion of a line protector on the VIOUT, +VSENSE, and −VSENSE pins offer further robustness.