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部品番号 AD5162
部品説明 SPI Digital Potentiometer
メーカ Analog Devices
ロゴ Analog Devices ロゴ 
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AD5162 Datasheet, AD5162 PDF,ピン配置, 機能
FEATURES
2-channel, 256-position potentiometer
End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ
Compact 10-lead MSOP (3 mm × 4.9 mm) package
Fast settling time: tS = 5 µs typical on power-up
Full read/write of wiper register
Power-on preset to midscale
Computer software replaces microcontroller in factory
programming applications
Single supply: 2.7 V to 5.5 V
Low temperature coefficient: 35 ppm/°C
Low power: IDD = 6 µA maximum
Wide operating temperature: −40°C to +125°C
Evaluation board available
Qualified for automotive applications
APPLICATIONS
Systems calibrations
Electronics level settings
Mechanical trimmers replacement in new designs
Permanent factory PCB setting
Transducer adjustment of pressure, temperature, position,
chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
GENERAL DESCRIPTION
The AD5162 provides a compact 3 mm × 4.9 mm packaged
solution for dual, 256-position adjustment applications. This
device performs the same electronic adjustment function as a
3-terminal mechanical potentiometer. Available in four end-to-
end resistance values (2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ), this low
temperature coefficient device is ideal for high accuracy and
stability-variable resistance adjustments. The wiper settings are
controllable through an SPI digital interface. The resistance
between the wiper and either endpoint of the fixed resistor
varies linearly with respect to the digital code transferred into
the RDAC latch.1
Dual, 256-Position, SPI
Digital Potentiometer
AD5162
FUNCTIONAL BLOCK DIAGRAM
A1 W1 B1
W2 B2
VDD
GND
CLK
SDI
CS
WIPER
REGISTER 1
A=0
WIPER
REGISTER 2
A=1
AD5162
SPI INTERFACE
Figure 1.
Operating from a 2.7 V to 5.5 V power supply and consuming
less than 6 µA allows the AD5162 to be used in portable battery-
operated applications.
For applications that program the AD5162 at the factory,
Analog Devices offers device programming software running
on Windows® NT/2000/XP operating systems. This software
effectively replaces the need for external SPI controllers, which
in turn enhances the time to market of systems. An AD5162
evaluation kit and software are available. The kit includes a
cable and instruction manual.
1 The terms digital potentiometer, VR, and RDAC are used interchangeably.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2003–2010 Analog Devices, Inc. All rights reserved.

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AD5162 pdf, 電子部品, 半導体, ピン配列
AD5162
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics: 2.5 kΩ Version................................. 3
Electrical Characteristics: 10 kΩ, 50 kΩ, and 100 kΩ Versions
......................................................................................................... 4
Timing Characteristics: All Versions ......................................... 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Test Circuits..................................................................................... 12
REVISION HISTORY
12/10—Rev. B to Rev.C
Added Automotive Parts to Features Section ............................... 1
Added Automotive Products Paragraph...................................... 17
4/09—Rev. A to Rev. B
Changes to Features Section............................................................ 1
Changes to DC Characteristics—Rheostat Mode Parameter and
to DC Characteristics—Potentiometer Divider Mode Parameter,
Table 1 ................................................................................................ 3
Updated Outline Dimensions ....................................................... 17
Changes to Ordering Guide .......................................................... 17
11/03—Rev. 0 to Rev. A
Changes to Electrical Characteristics ............................................ 3
11/03—Revision 0: Initial Version
Theory of Operation ...................................................................... 13
Programming the Variable Resistor and Voltage ................... 13
Programming the Potentiometer Divider............................... 14
ESD Protection ........................................................................... 14
Terminal Voltage Operating Range ......................................... 14
Power-Up Sequence ................................................................... 14
Layout and Power Supply Bypassing ....................................... 15
Constant Bias to Retain Resistance Setting............................. 15
Evaluation Board ........................................................................ 15
SPI Interface .................................................................................... 16
SPI-Compatible, 3-Wire Serial Bus.......................................... 16
Outline Dimensions ....................................................................... 17
Ordering Guide .......................................................................... 17
Automotive Products ................................................................. 17
Rev. C | Page 2 of 20





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