DP7112 Datasheet, PDF (1/10 Pages) Copal Electronics – 32-Tap Digital Potentiometer

DP7112
32-Tap Digital Potentiometer (DP)
with Buffered Wiper
Description
The DP7112 is a single digital potentiometer (DP)
designed as an electronic replacement for mechanical
potentiometers. Ideal for automated adjustments on high volume
production lines, they are also well suited for applications where
equipment requiring periodic adjustment is either difficult to access or
located in a hazardous or remote environment.
The DP7112 contains a ïWDS series resistor array connected
between two terminals R_H and R_L. An up/down counter and decoder
that are controlled by three input pins, determines which tap is
connected to the wiper, R_WB. The DP7112 wiper is buffered by an op
amp that operates rail to rail. The wiper setting, stored in nonïvolatile
memory, is not lost when the device is powered down and is
automatically recalled when power is returned. The wiper can be
adjusted to test new system values without effecting the stored setting.
Wiperïcontrol of the DP7112 is accomplished with three input
control pins, CS, U/D, and INC. The INC input increments the wiper
in the direction which is determined by the logic state of the U/D input.
The CS input is used to select the device and also store the wiper
position prior to power down.
The digital potentiometer can be used as a buffered voltage
divider. For applications where the potentiometer is used as a
2ïterminal variable resistor, please refer to the DP7114. The
buffered wiper of the DP7112 is not compatible with that
application.
Features
v 32ïposition Linear Taper Potentiometer
v Nonïvolatile EEPROM Wiper Storage; Buffered Wiper
v Low Power CMOS Technology
v Single Supply Operation: 2.5 V ï 6.0 V
v Increment Up/Down Serial Interface
v Resistance Values: 10 k , 50 k and 100 k
v Available in SOIC, TSSOP and MSOP Packages
v These Devices are PbïFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications
v Automated Product Calibration
v Remote Control Adjustments
v Offset, Gain and Zero Control
v Tamperïproof Calibrations
v Contrast, Brightness and Volume Controls
v Motor Controls and Feedback Systems
v Programmable Analog Functions
¢ NIDEC COPAL ELECTRONICS CORP
1
August, 2010 ï Rev. 14
SOICï8
MSOPï8
TSSOPï8
PIN CONFIGURATIONS
1
INC
V_CC
U/D
CS
R_H
GND
R_L
R_WB
SOIC (V),
MSOP (Z)
1
CS
V_CC
INC
U/D
R_L
R_WB
GND
R_H
TSSOP (Y)
(Top Views)
Pin Name
INC
U/D
R_H
GND
R_WB
R_L
CS
V_CC
PIN FUNCTION
Function
Increment Control
Up/Down Control
Potentiometer High Terminal
Ground
Buffered Wiper Terminal
Potentiometer Low Terminal
Chip Select
Supply Voltage
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
Publication Order Number:
DP7112/D