參數(shù)資料
型號(hào)： CAT515
英文描述： 8-Bit Quad Digital POT with Independent Reference Inputs(帶獨(dú)立電壓基準(zhǔn)輸入的四路，8位數(shù)字電位器)
中文描述： 8位四路數(shù)字電位器與獨(dú)立的基準(zhǔn)輸入（帶獨(dú)立電壓基準(zhǔn)輸入的四路，8位數(shù)字電位器）
文件頁數(shù)： 1/12頁
文件大?。?/td> 85K
代理商： CAT515
1
GND
CLK
CS
DI
DO
DVD
PROG
RDY/BSY
VREF H1
1
2
3
4
5
6
7
10
9
8
20
19
18
17
14
13
12
11
16
15
VREF H4
VREF H4
VREF H3
VREF L1
VREF L2
VREF L4
VREF L3
VOUT1
VOUT2
VOUT3
VOUT4
GND
CLK
CS
DI
DO
DVD
PROG
RDY/BSY
VREF H1
1
2
3
4
5
6
7
10
9
8
20
19
18
17
14
13
12
11
16
15
VREF H4
VREF H4
VREF H3
VREF L1
VREF L2
VREF L4
VREF L3
VOUT1
VOUT2
VOUT3
VOUT4
CAT515
8-Bit Quad Digital POT with Independent Reference Inputs
FEATURES
I
Output settings retained without power
I
Independent Reference Inputs
I
Output range includes both supply rails
I
Programming voltage generated on-chip
I
4 independently addressable outputs
I
Serial
μ
P interface
I
Single supply operation: 2.7V-5.5V
APPLICATIONS
I
Automated product calibration.
I
Remote control adjustment of equipment
I
Offset, gain and zero adjustments in Self-
Calibrating and Adaptive Control systems.
I
Tamper-proof calibrations.
DESCRIPTION
The CAT515 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
and systems capable of self calibration, it is also well
suited for applications were equipment requiring peri-
odic adjustment is either difficult to access or located in
a hazardous environment.
The CAT515 offers 4 independently programmable DACs
each having its own reference inputs and each capable
of rail to rail output swing. Output settings, stored 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
GND
DAC 3
DAC 2
16
EEPROM
LATCH
EEPROM
LATCH
EEPROM
LATCH
EEPROM
LATCH
17
DAC 1
18
15
13
14
12
DAC 4
VOUT
PROG
RDY/BSY
PROGRAM
CONTROL
H.V.
CHARGE
PUMP
SERIAL DATA OUTPUT
VREF
VREF
VOUT
VREF
VREF
OUT
VREF
VREF
VOUT
VREF
VREF
DO
VDD
DATA
CONTROLLER
1
2
5
CLK
CS
DI
4
6
7
9
20
19
11
10
3
8
PIN CONFIGURATION
Control of the CAT515 is accomplished with a simple 3
wire serial interface. A Chip Select pin allows several
CAT515's to share a common serial interface and com-
munications back to the host controller is via a single
serial data line thanks to the CAT515’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 CAT515 operates from a single 3–5 volt power
supply. The high voltage required for EEPROM Erase/
Write operations is generated on-chip.
The CAT515 is available in the 0
°
C to 70
°
C Commercial
and –40
°
C to +85
°
C Industrial operating temperature
ranges and offered in 20-pin plastic DIP and Surface
mount packages.
DIP Package (P)
SOIC Package (J)
CAT515
CAT515
CAT515
2000 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. 25077-00 2/98 M-1
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