CAT5127TDI-50-GT3 PDF预览

CAT5127TDI-50-GT3

更新时间: 2025-07-21 05:08:47
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32-Tap Digitally Programmable Potentiometer (DPP TM)

CAT5127TDI-50-GT3 数据手册

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CAT5127, CAT5129  
32-Tap Digitally Programmable Potentiometer (DPP™)  
FEATURES  
DESCRIPTION  
„ 32-position linear taper potentiometer  
„ Non-volatile EEPROM wiper storage  
„ Low standby current  
The CAT5127/CAT5129 are single digitally program–  
mable potentiometers (DPP™) designed as a electro–  
nic 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.  
„ Single supply operation: 2.5V – 5.5V  
„ Increment Up/Down serial interface  
„ Resistance values: 10k, 50kand 100kΩ  
„ CAT5127 in tiny 8 lead 2mmx2.5mm TDFN and  
MSOP packages  
The CAT5127 contains a 32-tap series resistor array  
connected between two terminals RH and RL. The  
CAT5129 contains a 32-tap series resistor array  
connected between two terminals RH and GND. An  
up/down counter and decoder that are controlled by  
three input pins, determines which tap is connected to  
the wiper. The wiper setting, stored in nonvolatile me–  
mory, is not lost when the device is powered down  
and is automatically reinstated when power is  
returned. The wiper can be adjusted to test new  
system values without effecting the stored setting.  
„ CAT5129 in the 6 lead TSOT23 package  
APPLICATION  
„ 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  
Wiper-control  
of  
the  
CAT5127/CAT5129  
¯¯  
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.  
For Ordering Information details, see page 11.  
The devices are used as two-terminal variable  
resistors. DPPs bring variability and programmability  
to a wide variety of applications including control,  
parameter adjustments, and signal processing.  
FUNCTIONAL DIAGRAM  
CAT5127  
CAT5129  
VCC  
VCC  
RH  
RH  
(U/D)  
(U/D)  
Control  
Control  
and  
and  
(INC)  
(CS)  
(INC)  
(CS)  
Memory  
Memory  
RL  
POR  
GND  
POR  
GND  
© 2006 Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
1
Doc. No. 2127 Rev. A  

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