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AD5241BR1M-REEL7 PDF预览

AD5241BR1M-REEL7

更新时间： 2024-11-20 23:27:15
品牌 Logo 应用领域
其他 - ETC 电位器
页数 文件大小 规格书
16页 361K
描述
DIGITAL POTENTIOMETER|SOP|14PIN|PLASTIC

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AD5241BR1M-REEL7 数据手册

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I2C®-Compatible  
256-Position Digital Potentiometers  
a
AD5241/AD5242  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
256 Position  
10 kꢀ, 100 kꢀ, 1 Mꢀ  
A
W
B
1
O
O
2
1
1
1
Low Tempco 30 ppm/ꢁC  
Internal Power ON Midscale Preset  
Single Supply 2.7 V to 5.5 V or  
Dual Supply ꢂ2.7 V for AC or Bipolar Operation  
I2C-Compatible Interface with Reaback Capability  
Extra Programmable Logic Outputs  
AD5241  
SHDN  
V
DD  
RDAC  
REGISTER 1  
REGISTER 2  
V
SS  
APPLICATIONS  
Multimedia, Video and Audio  
Communications  
Mechanical Potentiometer Replacement  
Instrumentation: Gain, Offset Adjustment  
Programmable Voltage-to-Current Conversion  
Line Impedance Matching  
ADDR  
DECODE  
8
SDA  
SCL  
GND  
PWR-ON  
RESET  
SERIAL INPUT REGISTER  
AD1  
AD0  
A
W
B
1
A
W
B
O
1
O
2
1
1
2
2 2  
GENERAL DESCRIPTION  
The AD5241/AD5242 provides a single-/dual-channel, 256-  
position digitally controlled variable resistor (VR) device. These  
devices perform 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. For  
AD5242, the fixed A-to-B terminal resistance of 10 kΩ, 100 kΩ  
or 1 MΩ has a 1% channel-to-channel matching tolerance.  
Nominal temperature coefficient of both parts is 30 ppm/°C.  
REGISTER  
SHDN  
V
DD  
RDAC  
REGISTER 1  
RDAC  
REGISTER 2  
V
SS  
ADDR  
DECODE  
AD5242  
8
1
Wiper position programming defaults to midscale at system  
power ON. Once powered, the VR wiper position is programmed  
by an I2C-compatible 2-wire serial data interface. Both parts  
have available two extra programmable logic outputs that  
enable users to drive digital loads, logic gates, LED drivers, and  
analog switches in their system.  
SDA  
SCL  
GND  
PWR-ON  
RESET  
SERIAL INPUT REGISTER  
AD1  
AD0  
The AD5241/AD5242 is available in surface-mount (SO-14/-16)  
packages and, for ultracompact solutions, TSSOP-14/-16 pack-  
ages. All parts are guaranteed to operate over the extended  
industrial temperature range of –40°C to +85°C. For 3-wire,  
SPI-compatible interface applications, please refer to AD5200,  
AD5201, AD5203, AD5204, AD5206, AD5231*, AD5232*,  
AD5235*, AD7376, AD8400, AD8402, and AD8403 products.  
*Nonvolatile digital potentiometer.  
I2C is a registered trademark of Philips Corporation.  
REV. A  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
may result from its use. No license is granted by implication or otherwise  
under any patent or patent rights of Analog Devices.  
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  
© Analog Devices, Inc., 2002  
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