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CAT504PITE13

Description
8-Bit Quad DACpot
File Size109KB,12 Pages
ManufacturerCatalyst
Websitehttp://www.catalyst-semiconductor.com/
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CAT504PITE13 Overview

8-Bit Quad DACpot

CAT504
8-Bit Quad DACpot
FEATURES
s
Output settings retained without power
s
Output range includes both supply rails
s
4 independently addressable outputs
s
1 LSB Accuracy
s
Serial
µ
P interface
s
Single supply operation: 2.7V-5.5V
s
Setting read-back without effecting outputs
APPLICATIONS
s
Automated product calibration.
s
Remote control adjustment of equipment
s
Offset, gain and zero adjustments in Self-
Calibrating and Adaptive Control systems.
s
Tamper-proof calibrations.
DESCRIPTION
The CAT504 is a quad 8-Bit Memory DAC designed as
an electronic replacement for mechanical potentiom-
eters and trim pots. 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 systems capable of self calibra-
tion, and applications where equipment which is either
difficult to access or in a hazardous environment, re-
quires periodic adjustment.
The 4 independently programmable DAC's have an
output range which includes both supply rails. Output
settings, stored in non-volatile EEPROM memory, are
not lost when the device is powered down and are
automatically reinstated when power is returned. Each
output can be dithered to test new output values without
effecting the stored settings and stored settings can be
read back without disturbing the DAC’s output.
FUNCTIONAL DIAGRAM
VPP
3
VDD
1
VREF H
14
Control of the CAT504 is accomplished with a simple 3
wire serial interface. A Chip Select pin allows several
CAT504s to share a common serial interface and com-
munication back to the host controller is via a single
serial data line thanks to the CAT504’s Tri-Stated Data
Output pin.
The CAT504 operates from a single 3–5 volt power
supply drawing just a few milliwatts of power. When
storing data in EEPROM memory an additional 20 volt
low current supply is required.
The CAT504 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 Surface
mount packages.
PIN CONFIGURATION
DIP Package (P)
VDD
CLK
VPP
CS
DI
DO
PROG
V
OUT 3
SOIC Package (J)
VDD
CLK
VPP
CS
DI
DO
PROG
1
2
3
14
13
VREFH
VOUT1
VOUT2
VOUT3
VOUT4
VREFL
GND
1
2
3
14
13
PROG
7
PROGRAM
CONTROL
DAC 1
13
V
OUT 1
DI
5
DAC 2
2
DATA
REGISTER
& EEPROM
DAC 3
12
V
OUT 2
CLK
SERIAL
CONTROL
12
CAT
4
11
504
5
10
6
9
7
8
VREFH
VOUT1
VOUT2
VOUT3
VOUT4
VREFL
GND
12
CAT
11
4
504
5
10
6
9
7
8
11
CS
4
DAC 4
10
V
OUT 4
SERIAL
DATA
OUTPUT
REGISTER
6
DO
CAT504
8
GND
9
VREF L
© 1998 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 25048-0A 2/98 M-1

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