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参数资料
| 型号： | AD5220BR10-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/11页 |
| 文件大小： | 0K |
| 描述： | IC DGTL POT SNGL 128POS 8-SOIC |
| 产品变化通告： | Product Discontinuation 05/Oct/2010 |
| 标准包装： | 1,000 |
| 接片： | 128 |
| 电阻（欧姆）： | 10k |
| 电路数： | 1 |
| 温度系数： | 标准值 800 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | 4 线串行（芯片选择，递增，增/减） |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
AD5220
–9–
REV.
PROGRAMMING THE POTENTIOMETER DIVIDER
Voltage Output Operation
The digital potentiometer easily generates an output voltage
proportional to the input voltage applied to a given terminal.
For example connecting A Terminal to +5 V and B Terminal to
ground produces an output voltage at the wiper which can be
any value starting at zero volts up to 1 LSB less than +5 V. Each
LSB of voltage is equal to the voltage applied across terminals
AB divided by the 128-position resolution of the potentiometer
divider. The general equation defining the output voltage with
respect to ground for any given input voltage applied to termi-
nals AB is:
VW(D) = D/128 × VAB + VB
(1)
D represents the current contents of the internal UP/DOWN
counter.
Operation of the digital potentiometer in the divider mode re-
sults in more accurate operation over temperature. Here the
output voltage is dependent on the ratio of the internal resistors,
not the absolute value, therefore, the drift improves to 20 ppm/
°C.
APPLICATIONS INFORMATION
The negative-edge sensitive CLK pin does not contain any
internal debounce circuitry. This standard CMOS logic input
responds to fast negative edges and needs to be debounced
externally with an appropriate circuit designed for the type of
switch closure device being used. Good performance results at
the CLK input pin when the negative logic transition has a
minimum slew rate of 1 V/
s. A wide variety of standard circuits
can be used such as a one-shot multivibrator, Schmitt Triggered
gates, cross coupled flip-flops, or RC filters to drive the CLK
pin with uniform negative edges. This will prevent the digital
potentiometer from skipping output codes while counting due to
switch contact bounce.
A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD5220BR50 | 制造商:Analog Devices 功能描述:Digital Potentiometer 128POS 50KOhm Single 8-Pin SOIC N 制造商:Rochester Electronics LLC 功能描述:7-BIT RDAC WITH UP/DWN CONTROL - Bulk 制造商:Analog Devices 功能描述:IC DIGITAL POT. 7-BIT UP/DOWN |
| AD5220BR50-REEL7 | 制造商:Analog Devices 功能描述:Digital Potentiometer 128POS 50KOhm Single 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:7-BIT RDAC WITH UP/DWN CONTROL - Tape and Reel |
| AD5220BRM10 | 制造商:Analog Devices 功能描述:Digital Potentiometer 128POS 10KOhm Single 8-Pin MSOP 制造商:Rochester Electronics LLC 功能描述:7-BIT RDAC WITH UP/DWN CONTROL - Bulk |
| AD5220BRM100 | 功能描述:IC DGTL POT SNGL 128POS 8USOIC RoHS:否 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) |
| AD5220BRM100-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Analog Devices 功能描述: |
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