The 3-wire serial interface operates at clock rates up to 50 MHz and is compatible with SPI, QSPI, MicrowireTM, and DSP interface standards. The parts incorporate a power-on-reset circuit to ensure that the DAC outputs power up to zero volts and remain there until a valid write cycle to the device takes place. The parts contain a power-down feature that reduces the current consumption of the device to under 2 A. The small size and low-power operation makes the DAC7551 ideally suited for battery-operated portable applications. The power consumption is typically 0.5 mW at 5 V, 0.23 mW at 3 V, and reduces to 1 W in power-down mode.