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CAT5114ZI-00TE13 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT5114ZI-00TE13 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 7 page 1 © 2004 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice Doc. No. 2002, Rev. L CAT5112 32-Tap Digitally Programmable Potentiometer (DPP™) with Buffered Wiper FEATURES s 32-position linear taper potentiometer s Non-volatile NVRAM wiper storage; buffered wiper s Low power CMOS technology s Single supply operation: 2.5V-6.0V s Increment up/down serial interface s Resistance values: 10k Ω, Ω, Ω, Ω, Ω, 50kΩ Ω Ω Ω Ω and 100kΩ Ω Ω Ω Ω s Available in PDIP, SOIC, TSSOP and MSOP packages APPLICATIONS s Automated product calibration s Remote control adjustments s Offset, gain and zero control s Tamper-proof calibrations s Contrast, brightness and volume controls s Motor controls and feedback systems s Programmable analog functions system values without effecting the stored setting. Wiper-control of the CAT5112 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 digitally programmable potentiometer can be used as a buffered voltage divider. For applications where the potentiometer is used as a 2-terminal variable resistor, please refer to the CAT5114. The buffered wiper of the CAT5112 is not compatible with that appli- cation. DPPs bring variability and programmability to a broad range of applications and are used primarily to control, regulate or adjust a characteristic or parameter of an analog circuit. FUNCTIONAL DIAGRAM DESCRIPTION The CAT5112 is a single digitally programmable potentiometer (DPP™) designed as a electronic replacement for mechanical potentiometers and trim pots. 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 CAT5112 contains a 32-tap series resistor array connected 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 NVRAM memory, is not lost when the de- vice is powered down and is automatically recalled when power is returned. The wiper can be adjusted to test new Electronic Potentiometer Implementation RH + – RWB RL CS + – INC U /D Control and Memory VCC R R R WB H L VSS Power On Recall > ALO GEN FR TM LEAD FREE |
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