参数资料
| 型号： | AD5258BRMZ10 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC POT DGTL I2C 10K 64P 10MSOP |
| 标准包装： | 50 |
| 接片： | 64 |
| 电阻（欧姆）： | 10k |
| 电路数： | 1 |
| 温度系数： | 标准值 200 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 787 (CN2011-ZH PDF) |
| 配用： | AD5258EVAL-ND - BOARD EVAL FOR AD5258 DGTL POT |
AD5258
Data Sheet
Rev. D | Page 20 of 24
DISPLAY APPLICATIONS
CIRCUITRY
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.
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.
05029-
045
A
B
W
R2
10kΩ
R1
70kΩ
R3
25kΩ
VDD
VLOGIC
SCL
SDA
GND
–
+
U1
AD8565
3.5V < VCOM < 4.5V
14.4V
VCC (~3.3V)
5V
AD5258
MCU
C1
1F
R5
10kΩ
R6
10kΩ
Figure 43. VCOM Adjustment Application
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
affect that node’s bias because it is only on the order of
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 k resistor; therefore, VLOGIC is
not connected to the same node as VDD.
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
VDD biases up the A, B, and W terminals for added flexibility.
05029-
046
A
B
W
R2
10kΩ
R1
70kΩ
R3
25kΩ
VDD
VLOGIC
SCL
SDA
GND
–
+
U1
AD8565
3.5V < VCOM < 4.5V
14.4V
VCC (~3.3V)
AD5258
MCU
C1
1F
R5
10kΩ
R6
10kΩ
SUPPLIES POWER
TO BOTH THE MCU
AND THE LOGIC
SUPPLY OF THE
DIGITAL
POTENTIOMETER
Figure 44. Circuitry When a Separate Supply Is Not Available for VDD
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.
相关PDF资料 |
PDF描述 |
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| AD5259BCPZ5-R7 | IC POT DGTL 5K 256POS 10LFCSP |
| AD5262BRU20 | IC POT DUAL 20K 256POS 16TSSOP |
| AD5263BRU20 | IC POT QUAD 20K 256POS 24-TSSOP |
| AD5270BRMZ-100 | IC RHEOSTAT 5V 50TP 1024 10MSOP |
| AD5272BRMZ-100-RL7 | IC RHEOSTAT 5V 50-TP 1024 10MSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5258BRMZ100 | 功能描述:IC POT DGTL I2C 100K 64P 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,300 系列:WiperLock™ 接片:257 电阻（欧姆）:100k 电路数:1 温度系数:标准值 150 ppm/°C 存储器类型:易失 接口:3 线 SPI（芯片选择） 电源电压:1.8 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VDFN 裸露焊盘 供应商设备封装:8-DFN-EP（3x3） 包装:带卷 (TR) |
| AD5258BRMZ1001 | 制造商:AD 制造商全称:Analog Devices 功能描述:Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer |
| AD5258BRMZ100-R7 | 功能描述:IC POT DGTL I2C 100K 64P 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数字电位器 系列:- 标准包装:3,000 系列:DPP 接片:32 电阻（欧姆）:10k 电路数:1 温度系数:标准值 300 ppm/°C 存储器类型:非易失 接口:3 线串行（芯片选择，递增，增/减） 电源电压:2.5 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 供应商设备封装:8-TDFN（2x3） 包装:带卷 (TR) |
| AD5258BRMZ100-R71 | 制造商:AD 制造商全称:Analog Devices 功能描述:Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer |
| AD5258BRMZ101 | 制造商:AD 制造商全称:Analog Devices 功能描述:Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer |
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