TPL0501 datasheet(12/31 Pages) TI2

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RHW

RWL

RTOT

RWL = RTOT x D/256

RHW = RTOT x (1 –(D/256))

Where D = Decimal Value of Wiper Code

TPL0501-100

SLIS136C – SEPTEMBER 2011 – REVISED SEPTEMBER 2019

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Product Folder Links: TPL0501-100

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7.5.2 Ideal Resistance Values

Figure 17. Digital Potentiometer Measurements

Table 2 shows the ideal values for DPOT with end-to-end resistance of 100 k

Ω. The absolute values of

resistance can vary significantly but the Ratio (RWL/RHW) is extremely accurate.

Table 2. DPOT Ideal Values

STEP

BINARY

100 kΩ

RWL/RHW

RWL (kΩ)

RHW (kΩ)

00000000

0.00

100.00

0.00

00000001

0.39

99.61

0.00

00000010

0.78

99.22

0.01

00000011

1.17

98.83

0.01

00000100

1.56

98.44

0.02

00000101

1.95

98.05

0.02

00000110

2.34

97.66

0.02

00000111

2.73

97.27

0.03

00001000

3.13

96.88

0.03

00001001

3.52

96.48

0.04

00001010

3.91

96.09

0.04

00001011

4.30

95.70

0.04

00001100

4.69

95.31

0.05

00001101

5.08

94.92

0.05

00001110

5.47

94.53

0.06

00001111

5.86

94.14

0.06

00010000

6.25

93.75

0.07

00010001

6.64

93.36

0.07

00010010

7.03

92.97

0.08

00010011

7.42

92.58

0.08

00010100

7.81

92.19

0.08

00010101

8.20

91.80

0.09

00010110

8.59

91.41

0.09

00010111

8.98

91.02

0.10

00011000

9.38

90.63

0.10

00011001

9.77

90.23

0.11

00011010

10.16

89.84

0.11

00011011

10.55

89.45

0.12

00011100

10.94

89.06

0.12

00011101

11.33

88.67

0.13

00011110

11.72

88.28

0.13

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