91
R201 = 5.92 x 107 / T x p | (Kohm) |
where p = bit per rev
=1,024 for 10 bits resolution
=4,096 for 12 bits
=16,384 for 14 bits
=65,536 for 16 bits
Closed Loop Bandwidth Selection (C67, C68, R200)
a. Choose the Closed Loop 3dB Bandwidth (f bw) required ensuring that
fref > 10 x fbw
Recommended bandwidth values: 250Hz for 3KHz
300Hz for 5KHz 500Hz for 10KHz
b. Select C67 so that
2.5x109 |
|
C67 = | (pF) |
2 |
|
R201 x fbw |
|
|
|
with R201 in Kohm and fbw in Hz as selected above.
c. C68 is given by
C68 = 40 x C67 | (pF) |
