CAT514 Catalyst Semiconductor, CAT514 Datasheet

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CAT514

Manufacturer Part Number
CAT514
Description
8-Bit Quad Digital POT
Manufacturer
Catalyst Semiconductor
Datasheet

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© 2000 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT514
8-Bit Quad Digital POT
FEATURES
DESCRIPTION
The CAT514 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
PROG
CLK
CS
DI
Output settings retained without power
Output range includes both supply rails
4 independently addressable outputs
1 LSB Accuracy
Serial P interface
Single supply operation: 2.7V-5.5V
Setting read-back without effecting outputs
7
5
2
4
CAT514
PROGRAM
CONTROL
CONTROL
RDY/BSY
SERIAL
GND
8
3
& EEPROM
REGISTER
DATA
V
DD
1
V
REF
V
9
REF
L
14
H
REGISTER
OUTPUT
SERIAL
DAC 1
DAC 2
DAC 3
DAC 4
DATA
13
12
11
10
6
V
V
V
V
DO
OUT
OUT
OUT
OUT
1
2
3
4
1
APPLICATIONS
Control of the CAT514 is accomplished with a simple 3
wire serial interface. A Chip Select pin allows several
CAT514's to share a common serial interface and com-
munication back to the host controller is via a single
serial data line thanks to the CAT514’s Tri-Stated Data
Output pin. A Rdy/Bsy output working in concert with an
internal low voltage detector signals proper operation of
EEPROM Erase/Write cycle.
The CAT514 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
packages.
RDY/BSY
Automated product calibration.
Remote control adjustment of equipment
Offset, gain and zero adjustments in Self-
Calibrating and Adaptive Control systems.
Tamper-proof calibrations.
PROG
V DD
CLK
DO
CS
DI
DIP Package (P)
1
2
3
4
5
6
7
CAT
514
14
13
12
10
11
9
8
PIN CONFIGURATION
V REF H
V OUT 1
V OUT 2
V OUT 3
V OUT 4
V REF L
GND
RDY/BSY
PROG
V DD
CLK
DO
CS
DI
SOIC Package (J)
Doc. No. 25075-00 2/98 M-1
1
2
3
4
5
6
7
CAT
514
14
13
12
11
10
9
8
V REF H
V OUT 1
V OUT 2
V OUT 3
V OUT 4
V REF L
GND

Related parts for CAT514

CAT514 Summary of contents

Page 1

... CAT514’s Tri-Stated Data Output pin. A Rdy/Bsy output working in concert with an internal low voltage detector signals proper operation of EEPROM Erase/Write cycle. The CAT514 is available in the Commercial and – Industrial operating temperature ranges and offered in 14-pin plastic DIP and SOIC packages. ...

Page 2

ABSOLUTE MAXIMUM RATINGS* Supply Voltage V to GND ...................................... –0.5V to +7V DD Inputs CLK to GND ............................ –0. GND .............................. –0. GND ............................... –0. PROG to GND ........................ –0.5V ...

Page 3

DC ELECTRICAL CHARACTERISTICS (Cont.): V = +2.7V to +5. REF Symbol Parameter Analog Output FSO Full-Scale Output Voltage ZSO Zero-Scale Output Voltage I DAC Output Load Current L R DAC Output Impedance OUT PSSR ...

Page 4

CLK t CSS CS t DIS DI t DIH DO1 PROG RDY/BSY CLK CSH CLK t CSMIN t DO0 t ...

Page 5

... CLOCK The CAT514’s clock controls both data flow in and out of the IC and EEPROM memory cell programming. Serial data is shifted into the DI pin and out of the DO pin on the clock’s rising edge. While it is not necessary for the clock ...

Page 6

... DATA OUTPUT Data is output serially by the CAT514, LSB first, via the Data Out (DO) pin following the reception of a start bit and two address bits by the Data Input (DI). becomes active whenever CS goes high and resumes its high impedance Tri-State mode when CS returns low ...

Page 7

... EEPROM then a change would occur at the read cycle’s conclusion. TEMPORARILY CHANGE OUTPUT The CAT514 allows temporary changes in DAC’s output to be made without disturbing the settings retained in EEPROM memory. This feature is particularly useful when testing for a new output setting and allows for user adjustment of preset or default values without losing the original factory settings ...

Page 8

... R = ——————————— DAC GND V L REF OFFSET + -V REF – for Dual Power Supply Systems 15K 10 µF 1N5231B 5. REF CAT514 OPT 504 + – LM 324 GND V L REF 4.02 K 1.00K Digitally Controlled Voltage Reference + (+ REF OFFSET 1 µ ...

Page 9

... CAT514 OPT 504 V PP DAC 1 CS DAC DAC 3 PROG CLK DAC 4 GND V L REF +5V V REF 1 REF OPT 514 CAT514 DAC 1 CS DAC DAC 3 PROG CLK DAC 4 GND V L REF 339 + – 10K +5V WINDOW 1 + – + – ...

Page 10

... DATA GND +5V CONTROL CAT514 & DATA GND Doc. No. 25075-00 2/98 M-1 2. REF 4.7 µA LM385-2.5 +15V DAC + +5V – 10K 10K CAT514 DAC + – meg 5 meg REF 10K Current Sink with 4 Decades of Resolution 51K 10K REF 5 meg 5 meg DAC – ...

Page 11

... ORDERING INFORMATION Prefix Device # CAT 514 Optional Product Company ID Number Notes: (1) The device used in the above example is a CAT514JI-TE13 (SOIC, Industrial Temperature, Tape & Reel) Suffix J I Package P: PDIP J: SOIC Temperature Range Blank = Commercial (0˚C to +70˚ Industrial (-40˚C to +85˚C) ...

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