Single-channel voltage and current-output DAC has adaptive power management

The Texas Instruments DAC8771 is a single channel, precision, fully integrated 16-bit DAC with adaptive power management. It is designed to satisfy the demands of industrial control applications. The adaptive power management circuit, when enabled, reduces the power dissipation of the chip. When programmed as a current output, the supply voltage on the current output driver is regulated between 4V and 32V based on constant feedback of voltage on the current output pin via a buck/boost converter. When programmed as a voltage output, this circuit produces a programmable supply voltage for the voltage output stage (±15V). The device contains an LDO to produce the digital supply (5V) from a single power supply pin, especially usefule in isolated applications. The device is also implemented with a 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 devices can run with a single external power supply of +12V to +36V using the integrated buck/boost converter or with external power supplies when the buck/boost converter is disabled.