CAT514 Datasheet, PDF (1/11 Pages) Catalyst Semiconductor – 8-Bit Quad Digital POT

CAT514
8-Bit Quad Digital POT
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 µP interface
s Single supply operation: 2.7V-5.5V
s Setting read-back without effecting outputs
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
RDY/BSY
3
VDD
1
VREF H
14
7
PROG
PROGRAM
CONTROL
DAC 1
13
VOUT 1
5
DI
2
CLK
4
CS
SERIAL
CONTROL
DATA
REGISTER
& EEPROM
DAC 2
DAC 3
DAC 4
12
VOUT 2
11
VOUT 3
10
VOUT 4
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.
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.
PIN CONFIGURATION
DIP Package (P)
SOIC Package (J)
VDD
CLK
RDY/BSY
CS
DI
DO
PROG
1 14
2 13
3 12
4 ^CAT 11
514
5 10
6
9
7
8
VREFH
VDD
VOUT1
CLK
VOUT2 RDY/BSY
VOUT3
CS
VOUT4
DI
VREFL
DO
GND
PROG
1 14
2 13
3 12
4 ^CAT 11
5 ⁵¹⁴ 10
6
9
7
8
VREFH
VOUT1
VOUT2
VOUT3
VOUT4
VREFL
GND
CAT514
8
GND
SERIAL
DATA
OUTPUT
REGISTER
9
VREF L
6
DO
© 2000 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 25075-00 2/98 M-1