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CAT525PI-TE10

更新时间： 2024-11-29 04:29:07
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Configured Digitally Programmable Potentiometer

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CAT525PI-TE10 数据手册

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E
CAT525  
Configured Digitally Programmable Potentiometer (DPP™):  
Programmable Voltage Applications  
TM  
FEATURES  
■ Single supply operation: 2.7V - 5.5V  
■ Four 8-bit DPPs configured as programmable  
voltage sources in DAC-like applications  
■ Setting read-back without effecting outputs  
■ Independent reference inputs  
APPLICATIONS  
■ Buffered wiper outputs  
■ Non-volatile NVRAM memory wiper storage  
■ Output voltage range includes both supply rails  
■ Automated product calibration  
■ Remote control adjustment of equipment  
■ Offset, gain and zero adjustments in  
■ 4 independently addressable buffered  
output wipers  
self-calibrating and adaptive control systems  
■ 1 LSB accuracy, high resolution  
■ Serial Microwire-like interface  
■ Tamper-proof calibrations  
■ DAC (with memory) substitute  
DESCRIPTION  
test new output values without effecting the stored  
settings and stored settings can be read back without  
disturbing the DPP’s output.  
The CAT525 is a quad 8-bit digitally programmable  
potentiometer (DPP™) configured for programmable  
voltage and DAC-like applications. Intended for final  
calibrationofproductssuchascamcorders,faxmachines  
and cellular telephones on automated high volume  
production lines and systems capable of self calibration,  
it is also well suited for applications were equipment  
requiring periodic adjustment is either difficult to access  
or located in a hazardous environment.  
Control of the CAT525 is accomplished with a simple 3-  
wire, Microwire-like serial interface. A Chip Select pin  
allows several CAT525's to share a common serial  
interfaceandcommunicationsbacktothehostcontroller  
is via a single serial data line thanks to the CAT525’s Tri-  
Stated Data Output pin. A RDY/BSY output working in  
concert with an internal low voltage detector signals  
properoperationofnon-volatileNVRAMMemoryErase/  
Write cycle.  
The CAT525 offers four independently programmable  
DPPs each having its own reference inputs and each  
capable of rail to rail output swing. The wipers are  
buffered by rail to rail op amps. Wiper settings, stored in  
non-volatile NVRAM memory, are not lost when the  
deviceispowereddownandareautomaticallyreinstated  
when power is returned. Each wiper can be dithered to  
The CAT525 is available in the 0°C to 70°C commercial  
and -40°C to 85°C industrial operating temperature  
ranges and offered in 20-pin plastic DIP and surface  
mount packages.  
FUNCTIONAL DIAGRAM  
PIN CONFIGURATION  
V
V
REF H3  
REF H1  
V
V
REF H4  
REF H2  
2
1
20  
19  
SOIC Package (J, W)  
DIP Package (P, L)  
5
9
RDY/BSY  
V
V
V
18  
17  
16  
15  
V
REFH2  
1
2
3
4
5
20  
19  
18  
17  
16  
15  
REFH3  
+
–
REFH2  
1
2
3
4
5
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
REFH3  
V
OUT1  
PROGRAM  
CONTROL  
PROG  
V
V
V
V
REFH4  
REFH1  
REFH4  
REFH1  
WIPER  
CONTROL  
REGISTERS  
AND  
+
–
V
V
OUT1  
V
V
V
OUT1  
DD  
OUT2  
DD  
4
6
V
OUT2  
NVRAM  
CLK  
V
OUT2  
CLK  
CLK  
CS  
DI  
+
–
DATA  
CONTROLLER  
V
OUT3  
RDY/BSY  
CS  
V
OUT3  
RDY/BSY  
CS  
V
OUT3  
V
7
6
7
V
6
OUT4  
OUT4  
+
–
CAT525  
CAT525  
V
OUT4  
14  
13  
12  
11  
V
REFL4  
DI  
DO  
7
V
DI  
DO  
REFL4  
24kΩ  
(ea)  
8
9
V
REFL3  
8
V
REFL3  
H.V.  
CHARGE  
PUMP  
SERIAL  
DATA  
OUTPUT  
REGISTER  
8
DO  
9
PROG  
GND  
V
PROG  
GND  
V
REFL2  
V
REFL1  
REFL2  
V
REFL1  
10  
10  
11  
12  
V
13  
14  
V
CAT525  
REFL2  
REFL4  
V
V
REFL1  
REFL3  
© 2004 by Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
Doc. No. 2001, Rev. E  
1
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