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AD5220BR10

更新时间： 2024-11-28 22:07:07
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亚德诺 - ADI 转换器数字电位计电阻器光电二极管
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10页 266K
描述
Increment/Decrement Digital Potentiometer

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中文翻译

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AD5220BR10 数据手册

 浏览型号AD5220BR10的Datasheet PDF文件第2页浏览型号AD5220BR10的Datasheet PDF文件第3页浏览型号AD5220BR10的Datasheet PDF文件第4页浏览型号AD5220BR10的Datasheet PDF文件第5页浏览型号AD5220BR10的Datasheet PDF文件第6页浏览型号AD5220BR10的Datasheet PDF文件第7页 
Increment/Decrement  
Digital Potentiometer  
a
AD5220  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
128 Position  
Potentiometer Replacement  
10 k⍀, 50 k⍀, 100 k⍀  
Very Low Power: 40 ␮A Max  
Increment/Decrement Count Control  
V
DD  
CLK  
D
E
C
O
D
E
A
CS  
EN  
UP/  
DOWN  
CNTR  
7
W
B
APPLICATIONS  
U/D  
RS  
GND  
POR  
40  
Mechanical Potentiometer Replacement  
Remote Incremental Adjustment Applications  
Instrumentation: Gain, Offset Adjustment  
Programmable Voltage-to-Current Conversion  
Programmable Filters, Delays, Time Constants  
Line Impedance Matching  
H
AD5220  
+5V  
CS  
UP/DOWN  
Power Supply Adjustment  
U/D  
CLK  
GENERAL DESCRIPTION  
The AD5220 provides a single channel, 128-position digitally  
controlled variable resistor (VR) device. This device performs  
the same electronic adjustment function as a potentiometer or  
variable resistor. These products were optimized for instrument  
and test equipment push-button applications. A choice between  
bandwidth or power dissipation are available as a result of the  
wide selection of end-to-end terminal resistance values.  
INCREMENT  
AD5220  
Figure 1. Typical Push-Button Control Application  
UPCOUNT DETAIL  
The AD5220 contains a fixed resistor with a wiper contact that  
taps the fixed resistor value at a point determined by a digitally  
controlled UP/DOWN counter. The resistance between the  
wiper and either end point of the fixed resistor provides a con-  
stant resistance step size that is equal to the end-to-end resis-  
tance divided by the number of positions (e.g., RSTEP = 10 kΩ/  
128 = 78 Ω). The variable resistor offers a true adjustable value  
of resistance, between the A terminal and the wiper, or the B  
terminal and the wiper. The fixed A-to-B terminal resistance of  
10 kΩ, 50 kΩ, or 100 kΩ has a nominal temperature coefficient  
of 800 ppm/°C.  
V
V
V
= 5.5V  
= 5.5V  
= 0V  
DD  
A
V
WB  
50mV/DIV  
B
f = 100kHz  
CLK  
5V/DIV  
Figure 2a. Stair-Step Increment Output  
The chip select CS, count CLK and U/D direction control  
inputs set the variable resistor position. These inputs that con-  
trol the internal UP/DOWN counter can be easily generated  
with mechanical or push button switches (or other contact closure  
devices). External debounce circuitry is required for the nega-  
tive-edge sensitive CLK pin. This simple digital interface elimi-  
nates the need for microcontrollers in front panel interface designs.  
V
V
V
= 5.5V  
= 5.5V  
= 0V  
COUNT  
DD  
00 v 3F v 00  
H
H
H
A
B
f = 60kHz  
V
WR  
The AD5220 is available in both surface mount (SO-8) and the  
8-lead plastic DIP package. For ultracompact solutions selected  
models are available in the thin µSOIC package. All parts are  
guaranteed to operate over the extended industrial temperature  
range of –40°C to +85°C. For 3-wire, SPI compatible inter-  
face applications, see the AD7376/AD8400/AD8402/AD8403  
products.  
f
= 60kHz  
CLK  
Figure 2b. Full-Scale Up/Down Count  
REV. 0  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, nor for any infringements of patents or other rights of third parties  
which 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  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1998  
1234567...10

中文翻译

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AD5220BR10 替代型号

型号 品牌 替代类型 描述 数据表
AD5220WBRZ10-REEL7 ADI

完全替代

 Increment/Decrement Digital Potentiometer
AD5220BRZ10-REEL ADI

完全替代

 Increment/Decrement Digital Potentiometer

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