12 bit 1MSPS R/2R DAC contains four main blocks: reference voltage source, bias voltage source, DAC core and control digital module. DAC core consist of the R/2R matrix and output operational class AB amplifier. Digital control register adj<15:4> sets optimal mode. It corrects output buffers current, common mode and output signal swing. DAC requires 1.62 ÷ 1.98 V (port Vdd18) analog supply voltage and 0.9 ÷ 1.1 V (port Vdd) digital supply voltage.
The block is designed on TSMC CMOS 90 nm technology.