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AD5253BRU50 PDF预览

AD5253BRU50

更新时间: 2024-02-14 22:47:13
品牌 Logo 应用领域
亚德诺 - ADI 转换器电位器数字电位计存储电阻器光电二极管
页数 文件大小 规格书
28页 919K
描述
Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers

AD5253BRU50 技术参数

Source Url Status Check Date:2013-05-01 14:56:11.231是否无铅: 含铅
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-153AC, TSSOP-20
针数:20Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:8.14其他特性:NONVOLATILE MEMORY; DEVICE SUPPORTS DUAL SUPPLY OPERATION
标称带宽:0.08 kHz控制接口:2-WIRE SERIAL
转换器类型:DIGITAL POTENTIOMETERJESD-30 代码:R-PDSO-G20
JESD-609代码:e0长度:6.5 mm
湿度敏感等级:1标称负供电电压:-2.5 V
功能数量:4位置数:64
端子数量:20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:TSSOP20,.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
最大电阻容差:20%最大电阻器端电压:2.75 V
最小电阻器端电压:-2.25 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技术:CMOS
标称温度系数:650 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:50000 Ω
宽度:4.4 mmBase Number Matches:1

AD5253BRU50 数据手册

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Quad 64-/256-Position I2C Nonvolatile  
Memory Digital Potentiometers  
AD5253/AD5254  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
AD5253: Quad 64-position resolution  
AD5254: Quad 256-position resolution  
1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ  
RDAC EEMEM  
V
RDAC0  
RDAC1  
RDAC2  
DD  
A0  
W0  
B0  
RDAC0  
REGIS-  
TER  
V
EEMEM  
POWER-ON  
REFRESH  
SS  
R
TOL  
AB  
DGND  
WP  
Nonvolatile memory1 stores wiper settings with write  
protection  
DATA  
Power-on refreshed to EEMEM settings in 300 µs typ  
EEMEM rewrite time = 540 µs typ  
A1  
W1  
B1  
SCL  
SDA  
RDAC1  
REGIS-  
TER  
2
I C  
SERIAL  
INTERFACE  
CONTROL  
Resistance tolerance stored in nonvolatile memory  
12 extra bytes in EEMEM for user-defined information  
I2C® compatible serial interface  
AD0  
AD1  
COMMAND  
DECODE LOGIC  
A2  
W2  
B2  
RDAC2  
REGIS-  
TER  
Direct read/write accesses of RDAC2 and EEMEM registers  
Predefined linear increment/decrement commands  
Predefined 6 dB step change commands  
Synchronous or asynchronous quad channel update  
Wiper setting readback  
ADDRESS  
DECODE LOGIC  
CONTROL LOGIC  
RDAC3  
A3  
W3  
B3  
RDAC3  
REGIS-  
TER  
AD5253/AD5254  
4 MHz bandwidth—1 kΩ version  
Single supply 2.7 V to 5.5 V  
Dual supply 2.25 V to 2.75 V  
2 slave address decoding bits allow operation of 4 devices  
100-year typical data retention, TA = 55°C  
Operating temperature: –40°C to +85°C  
Figure 1.  
The AD5253/AD5254 allow the host I2C controllers to write any  
of the 64-/256-step wiper settings in the RDAC registers and  
store them in the EEMEM. Once the settings are stored, they are  
restored automatically to the RDAC registers at system power-  
on; the settings can also be restored dynamically.  
APPLICATIONS  
Mechanical potentiometer replacement  
Low resolution DAC replacement  
RGB LED backlight control  
White LED brightness adjustment  
RF base station power amp bias control  
Programmable gain and offset control  
Programmable attenuators  
Programmable voltage-to-current conversion  
Programmable power supply  
The AD5253/AD5254 provide additional increment, decrement,  
+6 dB step change, and –6 dB step change in synchronous or  
asynchronous channel update modes. The increment and  
decrement functions allow stepwise linear adjustments, while  
6 dB step changes are equivalent to doubling or halving the  
RDAC wiper setting. These functions are useful for steep-slope  
nonlinear adjustment applications such as white LED brightness  
and audio volume control.  
Programmable filters  
Sensor calibrations  
GENERAL DESCRIPTION  
The AD5253/AD5254 are quad channel, I2C, nonvolatile mem-  
ory, digitally controlled potentiometers with 64/256 positions,  
respectively. These devices perform the same electronic adjust-  
ment functions as mechanical potentiometers, trimmers, and  
variable resistors.  
The AD5253/AD5254 have a patented resistance tolerance  
storing function that allows the user to access the EEMEM and  
obtain the absolute end-to-end resistance values of the RDACs  
for precision applications.  
The AD5253/AD5254 are available in TSSOP-20 packages in  
1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ options. All parts are  
guaranteed to operate over the –40°C to +85°C extended  
industrial temperature range.  
The AD5253/AD5254s versatile programmability allows multi-  
ple modes of operation, including read/write accesses in the  
RDAC and EEMEM registers, increment/decrement of  
resistance, resistance changes in 6 dB scales, wiper setting  
readback, and extra EEMEM for storing user-defined informa-  
tion, such as memory data for other components, look-up table,  
or system identification information.  
1The terms nonvolatile memory and EEMEM are used interchangeably.  
2The terms digital potentiometer and RDAC 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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