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AD5241BRU1M-REEL7 PDF预览

AD5241BRU1M-REEL7

更新时间： 2024-01-19 14:43:33
品牌 Logo 应用领域
亚德诺 - ADI 转换器电位器数字电位计电阻器光电二极管
页数 文件大小 规格书
16页 348K
描述
I2C Compatible 256-Position Digital Potentiometers

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中文翻译

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AD5241BRU1M-REEL7 技术参数

Source Url Status Check Date：2013-05-01 14:56:10.991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-153AB-1, TSSOP-14
针数：14Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.61其他特性：IT CAN ALSO OPERATE FROM A 3V NOM SINGLE SUPPLY OR +/-2.3V TO +/-2.7V DUAL SUPPLY
标称带宽：0.006 kHz控制接口：2-WIRE SERIAL
转换器类型：DIGITAL POTENTIOMETERJESD-30 代码：R-PDSO-G14
JESD-609代码：e0长度：5 mm
湿度敏感等级：1标称负供电电压：-2.5 V
功能数量：1位置数：256
端子数量：14最高工作温度：105 °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：TSSOP14,.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：+-2.5/3/5 V
认证状态：Not Qualified电阻定律：LINEAR
最大电阻容差：50%最大电阻器端电压：5.5 V
最小电阻器端电压：-2.3 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：30 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：1000000 Ω宽度：4.4 mm
Base Number Matches：1

AD5241BRU1M-REEL7 数据手册

 浏览型号AD5241BRU1M-REEL7的Datasheet PDF文件第6页浏览型号AD5241BRU1M-REEL7的Datasheet PDF文件第7页浏览型号AD5241BRU1M-REEL7的Datasheet PDF文件第8页浏览型号AD5241BRU1M-REEL7的Datasheet PDF文件第10页浏览型号AD5241BRU1M-REEL7的Datasheet PDF文件第11页浏览型号AD5241BRU1M-REEL7的Datasheet PDF文件第12页 
AD5241/AD5242  
6
0
6
0
FF  
80  
40  
20  
10  
08  
04  
02  
01  
FF  
80  
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
–6  
–6  
40  
20  
10  
08  
04  
02  
01  
–12  
–18  
–24  
–30  
–36  
–42  
–48  
–54  
–12  
–18  
–24  
–30  
–36  
–42  
–48  
–54  
100  
1k  
10k  
FREQUENCY – Hz  
100k  
100  
1k  
10k  
FREQUENCY – Hz  
100k  
TPC 13. AD5242 100 kΩ Gain vs. Frequency vs. Code  
TPC 14. AD5242 1 MΩ Gain vs. Frequency vs. Code  
OPERATION  
PROGRAMMING THE VARIABLE RESISTOR  
The AD5241/AD5242 provide a single-/dual-channel, 256-  
position digitally controlled variable resistor (VR) device. The  
terms VR, RDAC, and programmable resistor are commonly  
used interchangeably to refer to digital potentiometer.  
Rheostat Operation  
The nominal resistance of the RDAC between Terminals A and  
B is available in 10 kΩ, 100 kΩ, and 1 MΩ. The final two or  
three digits of the part number determine the nominal resistance  
value, e.g., 10 kΩ = 10; 100 kΩ = 100; 1 MΩ = 1 M. The  
nominal resistance (RAB) of the VR has 256 contact points  
accessed by the Wiper Terminal, plus the B Terminal con-  
tact. The 8-bit data in the RDAC latch is decoded to select  
one of the 256 possible settings. Assume a 10 kΩ part is used;  
the wiper’s first connection starts at the B Terminal for data  
00H. Since there is a 60 Ω wiper contact resistance, such con-  
nection yields a minimum of 60 Ω resistance between Terminals  
W and B. The second connection is the first tap point that cor-  
responds to 99 Ω (RWB = RAB/256 + RW = 39 + 60) for data  
01H. The third connection is the next tap point representing  
138 Ω (39 × 2 + 60) for data 02H, and so on. Each LSB data  
value increase moves the wiper up the resistor ladder until the  
last tap point is reached at 10021 Ω [RAB – 1 LSB + RW].  
Figure 4 shows a simplified diagram of the equivalent RDAC  
circuit where the last resistor string will not be accessed; there-  
fore, there is 1 LSB less of the nominal resistance at full scale in  
addition to the wiper resistance.  
To program the VR settings, refer to the Digital Interface sec-  
tion. Both parts have an internal power ON preset that places  
the wiper in midscale during power-on, which simplifies the  
fault condition recovery at power-up. In addition, the shutdown  
SHDN Pin of AD5241/AD5242 places the RDAC in an almost  
zero power consumption state where Terminal A is open circuited  
and Wiper W is connected to Terminal B, resulting in only  
leakage current being consumed in the VR structure. During  
shutdown, the VR latch contents are maintained when the RDAC  
is inactive. When the part is returned from shutdown, the stored  
VR setting will be applied to the RDAC.  
A
SHDN  
SW  
SHDN  
N
D7  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
R
R
SW  
2–1  
N
SW  
2–2  
The general equation determining the digitally programmed  
resistance between W and B is:  
W
D
256  
RWB D =  
× RAB + RW  
( )  
(1)  
SW  
R
R
1
RDAC  
LATCH  
AND  
N
R
R
/2  
AB  
where:  
SW  
0
DECODER  
D
is the decimal equivalent of the binary code between 0  
and 255, which is loaded in the 8-bit RDAC register.  
DIGITAL CIRCUITRY  
OMITTED FOR CLARITY  
B
RAB is the nominal end-to-end resistance.  
Figure 4. Equivalent RDAC Circuit  
RW is the wiper resistance contributed by the on resistance  
of the internal switch.  
Again, if RAB = 10 kΩ and the A Terminal can be either open  
circuit or tied to W, the following output resistance at RWB will  
be set for the following RDAC latch codes.  
REV. B  
–9–  
1...6789101112...16

中文翻译

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AD5241BRU1M-REEL7 替代型号

型号 品牌 替代类型 描述 数据表
AD5241BRUZ1M-R7 ADI

完全替代

 		I2C-Compatible, 256-Position Digital Potentiometers
AD5241BRUZ1M ADI

完全替代

 		I2C-Compatible, 256-Position Digital Potentiometers

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