Datasheet

H
L
W
R
HW
R
WL
R
TOT
R
WL
= R
TOT
x D/256
R
HW
= R
TOT
x (1 –(D/256))
Where D = Decimal Value of Wiper Code
TPL0202
www.ti.com SLIS135C –DECEMBER 2010–REVISED JUNE 2012
IDEAL RESISTANCE VALUES
Below table shows the ideal values for DPOT with end-to End resistance of 10kΩ. The absolute values of
resistance can vary significantly but the Ratio (Rhw/Rwl) is extremely accurate.
10 kΩ
Step Binary R
HW
/R
WL
R
HW
(kΩ) R
WL
(kΩ)
0 0 0.00 100.00 0.00
1 1 0.39 99.61 0.00
2 10 0.78 99.22 0.01
3 11 1.17 98.83 0.01
4 100 1.56 98.44 0.02
5 101 1.95 98.05 0.02
6 110 2.34 97.66 0.02
7 111 2.73 97.27 0.03
8 1000 3.13 96.88 0.03
9 1001 3.52 96.48 0.04
10 1010 3.91 96.09 0.04
11 1011 4.30 95.70 0.04
12 1100 4.69 95.31 0.05
13 1101 5.08 94.92 0.05
14 1110 5.47 94.53 0.06
15 1111 5.86 94.14 0.06
16 10000 6.25 93.75 0.07
17 10001 6.64 93.36 0.07
18 10010 7.03 92.97 0.08
19 10011 7.42 92.58 0.08
20 10100 7.81 92.19 0.08
21 10101 8.20 91.80 0.09
22 10110 8.59 91.41 0.09
23 10111 8.98 91.02 0.10
24 11000 9.38 90.63 0.10
25 11001 9.77 90.23 0.11
26 11010 10.16 89.84 0.11
27 11011 10.55 89.45 0.12
28 11100 10.94 89.06 0.12
29 11101 11.33 88.67 0.13
30 11110 11.72 88.28 0.13
31 11111 12.11 87.89 0.14
32 100000 12.50 87.50 0.14
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