Digital Electronics - Interfacing to the Analog World - Discussion
Discussion Forum : Interfacing to the Analog World - General Questions (Q.No. 4)
4.
A 4-bit R/2R D/A converter has a reference of 5 V. What is the analog output for the input code 0101?
Discussion:
6 comments Page 1 of 1.
Nitin said:
1 decade ago
How is it negative? Can any one please explain.
Kavya said:
1 decade ago
It is negative because here in his view the DAC made with op-amp which is in inverting mode. So he consider that negative sign.
Anand said:
1 decade ago
Why negative?
Nikunj said:
1 decade ago
Is @Kavya right?
Somasekhar reddy said:
1 decade ago
For 4 bit DAC vout = -(5*0/16 + 5*1/8 + 5*0/4 5*1/2).
Vout = -(5/8 + 5/2).
Vout = -(25/8).
Vout = -3.125.
Vout = -(5/8 + 5/2).
Vout = -(25/8).
Vout = -3.125.
Mayur said:
5 years ago
I think the answer is positive because op-amp as a buffer amplifier.
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