The DAC8775 is a quad-channel precision, fully integrated, 16-bit, digital-to-analog
converter (DAC) with adaptive power management, and is designed to meet the requirements of
industrial control applications. The adaptive power management circuit, when enabled, minimizes the
power dissipation of the chip. When programmed as a current output, the supply voltage on the
current output driver is regulated between 4.5 V and 32 V based on continuous feedback of voltage
on the current output pin via an integrated buck/boost converter. When programmed as a voltage
output, this circuit generates a programmable supply voltage for the voltage output stage (±15 V).
DAC8775 also contains an LDO to generate the digital supply (5 V) from a single power supply pin.
DAC8775 is also implemented with a Highway Addressable Remote Transducer (HART) Signal
Interface to superimpose an external HART signal on the current output. The slew rate of the
current output DAC is register programmable. The device can operate with a single external power
supply of +12 V to +36 V using the integrated buck/boost converters or with external power supplies
when the buck/boost converters are disabled.
