AD & DA Conversion

    DAC 8bit monotonic (R-string), glitch-free, integral
     nonlinearity of 0.6 LSB.

    Sigma-Delta ADC 7bit, fs=25kHz.

    Rate multiplying DAC (12bit).

    1st-order and 2nd-order sigma-delta ADCs for sensor read-
     out.

    3rd-order sigma-delta audio DAC with pre-emphasis
     (32 times over-sampling).