Datasheet CAT5112 (ON Semiconductor) - 2

link to page 11 CAT5112 32‐tap Digital Potentiometer (POT) with Buffered Wiper
Description
The CAT5112 is a single digital POT designed as an electronic
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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.
SOIC−8 MSOP−8
The CAT5112 contains a 32-tap series resistor array connected
V SUFFIX Z SUFFIX CASE 751BD CASE 846AD
between two terminals RH and RL. An up/down counter and decoder that are controlled by three input pins, determines which tap is connected to the wiper, RWB. The CAT5112 wiper is buffered by an op amp that operates rail to rail. The wiper setting, stored in non-volatile memory, is not lost when the device is powered down and is automatically recalled when power is returned. The wiper can be
PDIP−8 TSSOP−8
adjusted to test new system values without effecting the stored setting.
L SUFFIX Y SUFFIX
Wiper-control of the CAT5112 is accomplished with three input
CASE 646AA CASE 948AL
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.
PIN CONFIGURATIONS
The CS input is used to select the device and also store the wiper 1 INC V position prior to power down. CC U/D CS The digital POT can be used as a buffered voltage divider. For RH RL applications where the potentiometer is used as a 2-terminal variable GND RWB resistor, please refer to the CAT5114. The buffered wiper of the PDIP (L), SOIC (V), MSOP (Z) CAT5112 is not compatible with that application. 1
Features
CS RL VCC RWB 32-position Linear Taper Potentiometer INC GND U/D R Non-volatile EEPROM Wiper Storage; Buffered Wiper H TSSOP (Y) Low Power CMOS Technology (Top Views) Single Supply Operation: 2.5 V − 6.0 V Increment Up/Down Serial Interface
PIN FUNCTION
Resistance Values: 10 kW, 50 kW and 100 kW
Pin Name Function
Available in PDIP, SOIC, TSSOP and MSOP Packages INC Increment Control These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant U/D Up/Down Control RH Potentiometer High Terminal
Applications
GND Ground Automated Product Calibration RWB Buffered Wiper Terminal Remote Control Adjustments RL Potentiometer Low Terminal Offset, Gain and Zero Control CS Chip Select Tamper-proof Calibrations Contrast, Brightness and Volume Controls VCC Supply Voltage Motor Controls and Feedback Systems Programmable Analog Functions
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet.  Semiconductor Components Industries, LLC, 2013
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Publication Order Number:
June, 2013 − Rev. 16 CAT5112/D