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參數資料
| 型號： | CAT521 |
| 英文描述： | 113dB SNR Stereo Audio DAC (H/W Control) 28-SSOP -25 to 85 |
| 中文描述： | 8位數字電位器，帶有獨立的參考輸入 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 56K |
| 代理商： | CAT521 |
1
DO
PROG
RDY/BSY
CLK
1
2
3
4
5
6
7
14
13
12
11
8
10
9
VDD
VREF H1
GND
VOUT1
CS
DI
VREF L1
NC
NC
NC
DO
PROG
RDY/BSY
CLK
1
2
3
4
5
6
7
14
13
12
11
8
10
9
VDD
VREF H1
GND
VOUT1
CS
DI
VREF L1
NC
NC
NC
CAT521
8-Bit Digital POT With Independent Reference Inputs
FEATURES
I
Buffered Outputs
I
Output settings retained without power
I
Output range includes both supply rails
I
Programming voltage generated on-chip
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 CAT521 is a dual 8-Bit Memory DAC designed as an
electronic replacement for mechanical potentiometers
and trim pots. Intended for final calibration of products
such as camcorders, fax machines and cellular tele-
phones on automated high volume production lines and
systems capable of self calibration, it is also well suited
for applications were equipment requiring periodic ad-
justment is either difficult to access or located in a
hazardous environment.
The CAT521 consists of a programmable DAC with
independent high and low reference inputs and is ca-
pable of a rail to rail output swing. The output is buffered
by a rail to rail OP AMP. 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. The output can be dithered to test
new output values without effecting the stored settings
FUNCTIONAL DIAGRAM
PIN CONFIGURATION
and stored settings can be read back without disturbing
the DAC’s output.
Control of the CAT521 is accomplished with a simple 3
wire serial interface. A Chip Select pin allows several
CAT521'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 CAT521’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 CAT521 operates from a single 3–5 volt power
supply. The high voltage required for EEPROM Erase/
Write operations is generated on-chip.
The CAT521 is available in the 0
°
C 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.
DIP Package (P)
SOIC Package (J)
CAT521
2001 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Advanced Information
CAT521
CAT521
GND
EEPROM
LATCH
DAC 1
12
PROG
RDY/
BSY
PROGRAM
CONTROL
H.V.
CHARGE
PUMP
SERIAL DATA OUTPUT
V
V
REF
1
OUT
VREF
H1
DO
V
DD
DATA
CONTROLLER
14
3
CLK
CS
2
4
5
7
9
8
1
6
DI
+
–
相關PDF資料 |
PDF描述 |
|---|---|
| CAT522 | 8-Bit Dual Digital POT With Independent Reference Inputs |
| CAT523 | Configured Digitally Programmable Potentiometer (DPP): Programmable Voltage Applications |
| CAT59C11K | 512K x 32 Static RAM |
| CAT59C11KI | 512K x 32 Static RAM |
| CAT59C11KI-TE13 | 2M x 8 Static RAM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CAT5212 | 制造商:Datak Corporation 功能描述: |
| CAT521J | 功能描述:數字電位計 IC Com Temp 28K 3-Wire RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| CAT521JI | 功能描述:數字電位計 IC Ind Temp 28K 3-Wire RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| CAT521L | 功能描述:數字電位計 IC Com Temp 28K 3-Wire RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| CAT521LI | 功能描述:數字電位計 IC Ind Temp 28K 3-Wire RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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