Circuit of DAC is given below. Switch are closed if input

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Circuit of DAC is given below. Switch are closed if input bit is 1, otherwise open.

If V_ref = 5 V, R = 20 kΩ, and R_F = 10kΩ, then full scale voltage is _________V.

1. -2.445
2. -2.334
3. -4.002
4. -4.6875

Correct Option: D

Step size =	- V_ref	R_F = -5 ×	10k	× 20k = - 0.3125 V 1111₂ = 15₁₀
	8R		8

Full scale voltage = – 0.3125 × 15 = – 4.6875 V