8-bit bipolar DA converter that generates sine waves

ICih8-bit data memory circuit. Sending 8-bit data to
DAC08 during the Monday period can reduce errors caused by poor timing. Because the soap output terminal is thin. The
stabilization time is very short, 85ns, and the voltage conversion circuit has high switching speed requirements
, so the selected voltage converter uses a high-speed OP circuit. : The electric current is used to determine the base
current in early heat, usually 2mA at full scale, but this circuit takes IerAJ4L, _, and
    when the digital data is ooll, +lo=OmAi is FFⅡ -+Io=
0. 61mA (1x 255/stimA), - Rujing input fish dropout of electricity.
The zero-level output is basically the center value of digital data. ． When the number is 8F.
, +,. =0.smA,-J. =0. Wow 061mA,． I.with_j. There is
a deviation of 3-9u.A, which is converted into voltage of 19.53mV. Use V to adjust the confidence
to make the circuit confident (the tank range deviates from 1'/2LSB);