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AD5255BRU25-RL7 PDF预览

AD5255BRU25-RL7

更新时间： 2024-02-17 11:18:39
品牌 Logo 应用领域
亚德诺 - ADI 电位器存储
页数 文件大小 规格书
20页 824K
描述
3-Channel Digital Potentiometer with Nonvolatile Memory

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AD5255BRU25-RL7 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：TSSOP包装说明：MO-153AD, TSSOP-24
针数：24Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.86其他特性：SINGLE 3V OR 5V OPERATION ALSO POSSIBLE
标称带宽：0.125 kHz控制接口：INCREMENT/DECREMENT
转换器类型：DIGITAL POTENTIOMETERJESD-30 代码：R-PDSO-G24
JESD-609代码：e0长度：7.8 mm
湿度敏感等级：1标称负供电电压：-2.5 V
功能数量：3位置数：512
端子数量：24最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP24,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：240电源：3/5 V
认证状态：Not Qualified电阻定律：LINEAR/LOGARITHMIC
最大电阻容差：15%最大电阻器端电压：2.5 V
最小电阻器端电压：-2.5 V座面最大高度：1.2 mm
子类别：Digital Potentiometers标称供电电压：2.5 V
表面贴装：YES标称温度系数：35 ppm/ °C
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
标称总电阻：25000 Ω宽度：4.4 mm
Base Number Matches：1

AD5255BRU25-RL7 数据手册

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3-Channel Digital Potentiometer with  
Nonvolatile Memory  
AD5255  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
3 channels:  
Dual 512-position  
Single 128-position  
256 BYTES  
USER  
EEPROM  
RDAC0  
V
DD  
A0  
W0  
B0  
V
SS  
32 BYTES  
RDAC  
EEPROM  
GND  
25 kΩ or 250 kΩ full-scale resistance  
Low temperature coefficient:  
Potentiometer divider 15 ppm/°C  
Rheostat mode 35 ppm/°C  
Nonvolatile memory retains wiper settings  
Permanent memory write protection  
Linear increment/decrement  
6 dB increment/decrement  
I2C-compatible serial interface  
2.7 V to 5.5 V single-supply operation  
2.25 V to 2.75 V dual-supply operation  
Power-on reset time  
9 BIT  
SCL  
SDA  
RDAC1  
DATA  
CONTROL  
2
I C  
A1  
W1  
B1  
SERIAL  
INTERFACE  
A0_RDAC  
A1_RDAC  
A0_E  
9 BIT  
COMMAND  
DECODE  
LOGIC  
A1_E  
RDAC2  
A2  
W2  
B2  
POWER-ON  
RESET  
ADDRESS  
DECODE  
LOGIC  
RS  
7 BIT  
DECODE  
LOGIC  
WP  
Figure 1.  
256 bytes general-purpose user EEPROM  
11 bytes RDAC user EEPROM  
GBIC and SFP compliant EEPROM  
100-year typical data retention at TA = 55°C  
APPLICATIONS  
Mechanical potentiometer replacement  
RGB LED backlight control  
White LED brightness adjustment  
Programmable gain and offset control  
Programmable filters  
GENERAL DESCRIPTION  
Additional features of the AD5255 include preprogrammed  
linear and logarithmic increment/decrement wiper changing.  
The actual resistor tolerances are stored in EEPROM so that the  
actual end-to-end resistance is known, which is valuable for  
calibration in precision applications.  
The AD5255 provides dual 512-position and a single  
128-position digitally controlled variable resistors1 (VR) in a  
TSSOP package. This device performs the same electronic  
adjustment function as a potentiometer, trimmer, or variable  
resistor. Each VR offers a completely programmable value of  
resistance between the A terminal and the wiper or the B  
terminal and the wiper. The fixed A-to-B terminal resistance of  
25 kΩ or 250 kΩ has a 1% channel-to-channel matching  
tolerance and a nominal temperature coefficient of 35 ppm/°C.  
The AD5255 is available in a 24-lead TSSOP package. All parts  
are guaranteed to operate over the extended industrial tempera-  
ture range of −40°C to +85°C.  
1 The terms programmable resistor, variable resistor, RDAC, and digital  
potentiometer are used interchangeably.  
Wiper position programming, EEPROM2 reading, and EEPROM  
writing is conducted via the standard 2-wire I2C interface. Pre-  
vious/default wiper position settings can be stored in memory,  
and refreshed upon system power-up.  
2 The terms nonvolatile memory, EEMEM, and EEPROM are used  
interchangeably.  
Rev. 0  
Information furnished by Analog Devices is believed to be accurate and reliable.  
However, no responsibility is assumed by Analog Devices for its use, nor for any  
infringements of patents or other rights of third parties that may result from its use.  
Specifications subject to change without notice. No license is granted by implication  
or otherwise under any patent or patent rights of Analog Devices. Trademarks and  
registered trademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  
 
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