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TPL0102 bảng dữ liệu(PDF) 13 Page - Texas Instruments

tên linh kiện TPL0102
Giải thích chi tiết về linh kiện  TPL0102 Two 256-Taps Digital Potentiometers With Non-Volatile Memory
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TPL0102 bảng dữ liệu(HTML) 13 Page - Texas Instruments

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background image
(
)
HW
H
L
D
V
V
V
1
256
æ
ö
æ
ö
=
-
´
-
ç
÷
ç
÷
è
ø
è
ø
(
)
W
WL
H
L
D
V
V
V
V
256
=
=
-
´
H
L
W
VHW
VH - VL
VWL
H
L
W
Switch open when SHDN = Low
Switch closed when SHDN = High
13
TPL0102
www.ti.com
SLIS134C – MARCH 2011 – REVISED SEPTEMBER 2015
Product Folder Links: TPL0102
Submit Documentation Feedback
Copyright © 2011–2015, Texas Instruments Incorporated
7.4 Device Functional Modes
7.4.1 Shutdown Mode
The TPL0102 can be put in Shutdown Mode by executing the proper command in the ACR (Access Control
Register). Please see the TPL0102 Register Map for more details. When active, this feature causes terminal H to
become high impedance.
Figure 18. Equivalent Circuit for Shutdown Mode
7.4.2 Voltage Divider Mode
The digital potentiometer generates a voltage divider when all three terminals are used. The voltage divider at
wiper-to-H and wiper-to-L is proportional to the input voltage at H to L.
Figure 19. Equivalent Circuit for Voltage Divider Mode
For example, connecting terminal H to 5 V and terminal L to ground, the output voltage at terminal W can range
from 0 V to 5 V. The general equation defining the output voltage at terminal W for any valid input voltage
applied to terminal H and terminal L is
(1)
The voltage difference between terminal H and terminal W can also be calculated
where
•
D is the decimal value of the wiper code.
(2)



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