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AD5258BRMZ50-R7 PDF预览

AD5258BRMZ50-R7

更新时间： 2024-02-18 02:03:18
品牌 Logo 应用领域
亚德诺 - ADI 电位器
页数 文件大小 规格书
24页 534K
描述
Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer

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AD5258BRMZ50-R7 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：TSSOP
包装说明：TSSOP, TSSOP10,.19,20针数：10
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.32
其他特性：NONVOLATILE MEMORY标称带宽：0.19 kHz
控制接口：2-WIRE SERIAL转换器类型：DIGITAL POTENTIOMETER
JESD-30 代码：S-PDSO-G10JESD-609代码：e3
长度：3 mm湿度敏感等级：1
功能数量：1位置数：64
端子数量：10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：TSSOP10,.19,20
封装形状：SQUARE封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260电源：3/5 V
认证状态：Not Qualified电阻定律：LINEAR
最大电阻容差：30%最大电阻器端电压：5.5 V
最小电阻器端电压：座面最大高度：1.1 mm
子类别：Digital Potentiometers标称供电电压：3 V
表面贴装：YES标称温度系数：200 ppm/ °C
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.5 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：3 mm
Base Number Matches：1

AD5258BRMZ50-R7 数据手册

 浏览型号AD5258BRMZ50-R7的Datasheet PDF文件第17页浏览型号AD5258BRMZ50-R7的Datasheet PDF文件第18页浏览型号AD5258BRMZ50-R7的Datasheet PDF文件第19页浏览型号AD5258BRMZ50-R7的Datasheet PDF文件第21页浏览型号AD5258BRMZ50-R7的Datasheet PDF文件第22页浏览型号AD5258BRMZ50-R7的Datasheet PDF文件第23页 
AD5258  
Data Sheet  
DISPLAY APPLICATIONS  
affect that node’s bias because it is only on the order of  
CIRCUITRY  
microamps. VLOGIC is tied to the microcontroller’s (MCU) 3.3 V  
digital supply because VLOGIC will draw the 35 mA that is needed  
when writing to the EEPROM. It would be impractical to try to  
source 35 mA through the 70 kΩ resistor; therefore, VLOGIC is  
A special feature of the AD5258 is its unique separation of  
the VLOGIC and VDD supply pins. The reason for doing this is  
to provide greater flexibility in applications that do not always  
provide the needed supply voltages.  
not connected to the same node as VDD  
.
In particular, LCD panels often require a VCOM voltage in  
the range of 3 V to 5 V. The circuit in Figure 43 is the rare  
exception in which a 5 V supply is available to power the  
digital potentiometer.  
For this reason, VLOGIC and VDD are provided as two separate  
supply pins that can either be tied together or treated inde-  
pendently; VLOGIC supplies the logic/EEPROM with power, and  
V
DD biases up the A, B, and W terminals for added flexibility.  
SUPPLIES POWER  
VCC (~3.3V)  
14.4V  
TO BOTH THE MCU  
AND THE LOGIC  
SUPPLY OF THE  
DIGITAL  
VCC (~3.3V)  
5V  
14.4V  
R1  
70kΩ  
R1  
POTENTIOMETER  
70kΩ  
C1  
1µF  
C1  
1µF  
AD5258  
AD5258  
R6  
R5  
–
R6  
R5  
V
V
DD  
–
10kΩ 10kΩ  
V
V
DD  
10kΩ 10kΩ  
U1  
AD8565  
U1  
AD8565  
LOGIC  
LOGIC  
R2  
10kΩ  
R2  
A
A
3.5V < V  
COM  
< 4.5V  
10kΩ  
SCL  
SDA  
GND  
3.5V < V  
COM  
< 4.5V  
+
SCL  
SDA  
GND  
+
MCU  
W
MCU  
W
B
B
R3  
25kΩ  
R3  
25kΩ  
Figure 44. Circuitry When a Separate Supply Is Not Available for VDD  
Figure 43. VCOM Adjustment Application  
For a more detailed look at this application, refer to the article,  
“Simple VCOM Adjustment uses any Logic-Supply Voltage” in the  
September 30, 2004, issue of EDN magazine.  
More commonly, only analog 14.4 V and digital logic 3.3 V sup-  
plies are available (see Figure 44). By placing discrete resistors  
above and below the digital potentiometer, VDD can be tapped  
off the resistor string itself. Based on the chosen resistor values,  
the voltage at VDD in this case equals 4.8 V, allowing the wiper to  
be safely operated up to 4.8 V. The current draw of VDD will not  
Rev. D | Page 20 of 24  
 
 
 
 
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