modified 7 years ago

4-bit DAC R-2R Ladder current divider

01:16:33

R-2R ladder + current to voltage converter

Current divides by 1/2 in every node of the R-2R ladder -> is added at input of inverting amplifier. Scaling of output voltage possible with R_F (feedback resistor of amp).

V_ref = 8V

D = digital value
switch for LSB -> right
switch for MSB -> left

input for each bit is either V_ref (logic 1) or 0V (logic 0) -> adjust binary number with switches

V_out = -D/16 * V_ref

published 8 years ago

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