Datasheet

PmodDPOT™ Reference Manual
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 2 of 2
Equations for the programmable resistance values and output voltages are provided from the AD5160
datasheet below:
()
256
WB AB W
D
R D R R  
Here, R
AB
represents the nominal resistance of 10 kΩ and R
W
is the wiper terminal resistance of 60 Ω.
256
()
256
WA AB W
D
R D R R

  
Here, R
AB
represents the nominal resistance of 10 kΩ and R
W
is the wiper terminal resistance of 60 Ω.
( ) ( )
()
256 256
WB WA
W A B
R D R D
V D V V
Here, R
WA
and R
WB
are the resistances calculated in the two above equations and VA and VB are the voltages
applied at terminals A and B, respectively.
Care must be taken to ensure that current flow between the wiper terminal and either terminal A or B must be
limited to a pulsed ±20mA or a continuous 4.7mA so that the power dissipation capabilities of the on-board chip is
not exceeded.
2.1 Pinout Description Table
Pin
Signal
Description
1
~CS
Chip Select
2
MOSI
Master-In-Slave-Out
3
(NC)
Not Connected
4
SCLK
Serial Clock
5
GND
Power Supply Ground
6
VCC
Power Supply (3.3V/5V)
Any external power applied to the PmodDPOT must be within 2.7V and 5.5V; however, it is recommended that
Pmod is operated at 3.3V. Users must also ensure that any voltage applied to the outside terminals is between
GND and VCC.
3 Physical Dimensions
The pins on the pin header are spaced 100 mil apart. The PCB is 0.9 inches long on the sides parallel to the pins on
the pin header and 0.8 inches long on the sides perpendicular to the pin header.