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CAT522LI-TE10 PDF预览

CAT522LI-TE10

更新时间： 2024-11-26 04:35:47
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Configured Digitally Programmable Potentiometer

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CAT522LI-TE10 数据手册

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E
CAT522  
Configured Digitally Programmable Potentiometer (DPP™):  
Programmable Voltage Applications  
TM  
FEATURES  
APPLICATIONS  
■ Two 8-bit DPPs configured as programmable  
■ Automated product calibration.  
voltage sources in DAC-like applications  
■ Remote control adjustment of equipment  
■ Independent reference inputs  
■ Offset, gain and zero adjustments in self-  
■ Non-volatile NVRAM memory wiper storage  
■ Output voltage range includes both supply rails  
calibrating and adaptive control systems.  
■ Tamper-proof calibrations.  
■ 2 independently addressable buffered  
■ DAC (with memory) substitute.  
output wipers  
■ 1 LSB accuracy, high resolution  
■ Serial Microwire-like interface  
■ Single supply operation: 2.7V - 5.5V  
■ Setting read-back without effecting outputs  
DESCRIPTION  
dithered to test new output values without effecting the  
stored settings and stored settings can be read back  
without disturbing the DPP's output.  
The CAT522 is a dual, 8-bit digitally-programmable  
potentiometer (DPP™) configured for programmable  
voltage and DAC-like applications. Intended for final  
calibration of products such as camcorders, fax  
machines and cellular telephones on automated high  
volume production lines, it is also well suited for  
self-calibrating systems and for applications where  
equipment which requires periodic adjustment is either  
difficult to access or in a hazardous environment.  
TheCAT522iscontrolledwithasimple3-wire,microwire-  
like serial interface. A Chip Select pin allows several  
devices to share a common serial interface.  
Communication back to the host controller is via a single  
serial data line thanks to the CAT522 Tri-Stated Data  
Output pin. A RDY/BSY output working in concert with  
aninternallowvoltagedetectorsignalsproperoperation  
of the non-volatile NVRAM memory Erase/Write cycle.  
The CAT522 offers two 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 opamps. Wiper settings, stored in  
non-volatile NVRAM memory, are not lost when the  
device is powered down and are automatically  
reinstated when power is returned. Each wiper can be  
The CAT522 is available in the 0°C to 70°C commercial  
and -40°C to 85°C industrial operating temperature  
ranges. Both 14-pin plastic DIP and surface mount  
packages are available.  
PIN CONFIGURATION  
FUNCTIONAL DIAGRAM  
V
V
V
REFH2  
REFH1  
RDY/BSY  
DD  
DIP Package (P, L)  
SOIC Package (J, W)  
14  
13  
3
1
7
PROGRAM  
CONTROL  
PROG  
1
2
3
4
5
14  
13  
12  
11  
10  
9
V
V
V
V
V
V
V
1
2
3
4
5
14  
13  
12  
11  
10  
9
V
V
V
V
V
V
V
DD  
REFH1  
REFH2  
OUT1  
DD  
REFH1  
REFH2  
OUT1  
CLK  
RDY/BSY  
CS  
CLK  
RDY/BSY  
CS  
5
2
DI  
11  
12  
+
+
V
WIPER  
CONTROL  
REGISTERS  
AND  
24KΩ  
OUT2  
SERIAL  
CONTROL  
CLK  
NVRAM  
OUT2  
OUT2  
4
CAT522  
CAT522  
CS  
V
24kΩ  
OU  
DI  
DI  
REFL2  
REFL1  
REFL2  
REFL1  
DO  
6
7
DO  
6
7
SERIAL  
6
8
DATA  
PROG  
GND  
8
PROG  
GND  
DO  
OUTPUT  
REGISTER  
CAT522  
8
9
10  
V
V
REFL2  
GND  
REFL1  
© 2004 by Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
Doc. No. 2004, Rev. E  
1
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