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CAT523

更新时间： 2024-11-25 22:54:19
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CATALYST /
页数 文件大小 规格书
10页 72K
描述
Configured Digitally Programmable Potentiometer (DPP): Programmable Voltage Applications

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CAT523 数据手册

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Advance Information  
CAT523  
Configured Digitally Programmable Potentiometer (DPP): Programmable Voltage Applications  
APPLICATIONS  
FEATURES  
■ Two 8-bit DPPS Configured as Programmable  
■ Automated product calibration.  
■ Remote control adjustment of equipment  
Voltages in DAC-like Applications  
■ Buffered Wiper Outputs  
■ Offset, gain and zero adjustments in Self-  
■ Nonvolatile Wiper Storage  
Calibrating and Adaptive Control systems.  
■ Output voltage range includes both supply rails  
■ 2 independently addressable output wipers  
■ 1 LSB Accuracy, High Resolution  
■ Serial µP interface  
■ Tamper-proof calibrations.  
■ DAC (with memory) substitute  
■ Single supply operation: 2.7V-5.5V  
■ Setting read-back without effecting outputs  
DESCRIPTION  
The CAT523 is a dual, 8-bit digitally-programmable  
potentiometerconfiguredforprogrammablevoltageand  
DAC-like applications. Intended for final calibration of  
productssuchascamcorders,faxmachinesandcellular  
telephones on automated high volume production lines,  
it is also well suited for systems capable of self  
calibration, and applications where equipment which is  
either difficult to access or in a hazardous environment,  
requires periodic adjustment.  
effecting the stored settings and stored settings can be  
read back without disturbing the DAC’s output.  
Control of the CAT523 is accomplished with a simple 3  
wire serial interface. A Chip Select pin allows several  
CAT523's to share a common serial interface and  
communication back to the host controller is via a single  
serial data line thanks to the CAT523’s Tri-Stated Data  
Output pin. A RDY/BSY output working in concert with  
aninternallowvoltagedetectorsignalsproperoperation  
of non-volatile Erase/Write cycle.  
The 2 independently programmable DPPs have a  
common output voltage range which includes both  
supply rails. The wipers are buffered by rail to rail OP  
AMPS. Wiper settings, stored in non-volatile memory,  
are not lost when the device is powered down and are  
automatically reinstated when power is returned. Each  
wiper can be dithered to test new output values without  
The CAT523 is available in the 0 to 70° C Commercial  
and –40° C to + 85° C Industrial operating temperature  
ranges and offered in 14-pin plastic DIP and SOIC  
mount packages.  
PIN CONFIGURATION  
FUNCTIONAL DIAGRAM  
RDY/BSY  
V
V
H
DD  
REF  
SOIC Package (J)  
DIP Package (P)  
14  
3
1
H
1
H
1
V
DD  
V
V
V
V
V
1
2
3
4
5
6
14  
13  
12  
11  
10  
9
1
2
3
4
5
6
14  
13  
12  
11  
10  
9
DD  
REF  
REF  
7
PROGRAM  
CONTROL  
PROG  
CLK  
RDY/BSY  
CS  
CLK  
OUT  
OUT  
2
2
V
V
RDY/BSY  
CS  
OUT  
OUT  
CAT  
523  
CAT  
523  
NC  
NC  
5
2
DI  
DI  
DI  
NC  
V
NC  
V
DATA  
REGISTER  
AND  
13  
12  
+
+
V
1
2
L
L
OUT  
DO  
7KΩ  
DO  
REF  
REF  
SERIAL  
CONTROL  
CLK  
NONVOLATILE  
MEMORY  
PROG  
GND  
PROG  
GND  
8
7
8
7
4
CS  
V
7KΩ  
OU  
SERIAL  
DATA  
OUTPUT  
6
DO  
REGISTER  
CAT523  
8
9
L
GND  
V
REF  
© 2001 by Catalyst Semiconductor, Inc.  
Doc. No. 25076-00 2/98 M-1  
1
Characteristics subject to change without notice  
1234567...10

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