The AD7548 is a 12-bit single-chip CMOS DAC suitable for use with 8-bit bus microprocessors. The data is loaded into the input hold register in double bytes, as shown in the block diagram on the right. The AD7548 supports left- or right-aligned data, LSB priority, or MSB priority, with standard TTL-compatible control inputs.
Independent loading DAC control inputs allow the user to choose when to update the analog output: at the same time as new data is loaded into the DAC input registers or at any time after the data is loaded. This feature is especially important in multi-DAC systems that require all DACs to be updated at the same time.