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CAT5111LI-50-G Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT5111LI-50-G Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 11 page CAT5111 © 2007 Catalyst Semiconductor, Inc. 1 Doc. No. MD-2008 Rev. P Characteristics subject to change without notice 100-Tap Digitally Programmable Potentiometer (DPP™) with Buffered Wiper FEATURES 100-position linear taper potentiometer Non-volatile EEPROM wiper storage; buffered wiper Low power CMOS technology Single supply operation: 2.5V-6.0V Increment up/down serial interface Resistance values: 10kΩ, 50kΩ and 100kΩ Available in PDIP, SOIC, TSSOP and MSOP packages APPLICATIONS Automated product calibration Remote control adjustments Offset, gain and zero control Tamper-proof calibrations Contrast, brightness and volume controls Motor controls and feedback systems Programmable analog functions For Ordering Information details, see page 10. DESCRIPTION The CAT5111 is a single digitally programmable potentiometer (DPP™) designed as a 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 CAT5111 contains a 100-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 CAT5111 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 adjusted to test new system values without effecting the stored setting. Wiper-control of the CAT5111 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 CAT5113. The buffered wiper of the CAT5111 is not compatible with that application. FUNCTIONAL DIAGRAM Control and Memory Power On Recall VCC GND U/D INC CS RH RH RWB RWB RL RL + – + – Electronic Potentiometer Implementation |
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