op amp summer as a digital to analog converter dac

Posted on Feb 6, 2014

The circuit shown in Figure 1 is a simple 4-bit digital-to-analog converter. It is actually just a simple op amp summer circuit, i. e. , an operational amplifier configured to output a voltage that is proportional to the sum of the input voltages. The op-amp summer circuit above works as a DAC because its input voltages are binary weighted with resp

op amp summer as a digital to analog converter dac
Click here to download the full size of the above Circuit.

ect to each other, as set by the resistors (10K, 20K, 40K, 80K) at the inputs. Vo = -VRef (5K) (S3/10K + S2/20K + S1/40K + S0/80K) = -VRef (S3/2 + S2/4 + S1/8 + S0/16) wherein S3, S2, S1, and S0 are the logic inputs (`1` or `0`). The number of bits of this DAC may be increased by connecting more switches with corresponding binary-weighted resistors to the inputs.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Guitar Reverb Pedal project
    Differential capacitance measurement
    Voltage Doublers
    Lighting Control
    Simple AC short circuit protection
    EPSON PHOTO 830U printer power circuit