Datasheet

SPI INTERFACE
WIPER
REGISTER
HA
LA
WA
VDD
GND
SCLK
DIN
CS
H
L
W
R
HW
R
WL
R
TOT
H
L
W
R
TOT
R
WL
= R
TOT
x D/256
R
HW
= R
TOT
x (1 – (D/256))
VOLTAGE DIVIDER MODE
RHEOSTAT MODE A
RHEOSTAT MODE B
Where D = Decimal Value of Wiper Code
Where D = Decimal Value of Wiper Code
Where D = Decimal Value of Wiper Code
H (Floating)
L
W
R
WL
R
TOT
R
HW
H
L (Floating)
W
R
TOT
OR
OR
V
H
W
V
HW
V
WL
V
H
- V
L
V
L
V
WL
= (V
H
– V
L
) x D/256
V
HW
= (V
H
– V
L
) x (1 – (D/256))
TPL0501
SLIS136A –SEPTEMBER 2011– REVISED SEPTEMBER 2011 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
FUNCTIONAL BLOCK DIAGRAM
DIGITAL POTENTIOMETER CONFIGURATIONS
Figure 1. DPOT Configurations
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