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AD5247 Datasheet Download - Analog Devices

Номер произв AD5247
Описание 128-Position I2C-Compatible Digital Potentiometer
Производители Analog Devices
логотип Analog Devices логотип 

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AD5247 Даташит, Описание, Даташиты
Data Sheet
FEATURES
128 positions
End-to-end resistance: 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Ultracompact, SC70-6 (2 mm × 2.1 mm) package
I2C-compatible interface
Full read/write of wiper register
Power-on preset to midscale
Single-supply 2.7 V to 5.5 V
Rheostat mode temperature coefficient: 45 ppm/°C
Low power, IDD = 0.9 µA at 3.3 V typical
Wide operating temperature range: −40°C to +125°C
APPLICATIONS
Mechanical potentiometer replacement in new designs
Transducer adjustment of pressure, temperature, position,
chemical, and optical sensors
RF amplifier-biasing
LCD brightness and contrast adjustment
Automotive electronics adjustment
Gain control and offset adjustment
GENERAL DESCRIPTION
The AD5247 provides a compact, 2 mm × 2.1 mm, packaged
solution for 128-position adjustment applications. This device
performs the same electronic adjustment function as a mechanical
potentiometer or a variable resistor. Available in four different
end-to-end resistance values (5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ),
these low temperature coefficient devices are ideal for high
accuracy and stability variable resistance adjustments.
The wiper settings are controllable through the I2C-compatible
digital interface, which can also be used to read back the present
wiper register control word. The 10 kΩ and 100 kΩ options each
128-Position I2C-Compatible
Digital Potentiometer
AD5247
FUNCTIONAL BLOCK DIAGRAM
VDD
SDA
SCL
I2C INTERFACE
A
W
WIPER
REGISTER
B
GND
Figure 1.
have three hard-coded slave address options available to allow
users access to three of these devices on one I2C bus (see Table 8
for a full list of slave address locations).
The resistance between the wiper and either end point of
the fixed resistor varies linearly with respect to the digital
code transferred into the RDAC latch. Note the terms digital
potentiometer, VR (variable resistor), and RDAC are used
interchangeably in this document.
Operating from a 2.7 V to 5.5 V power supply and consuming
0.9 µA (3.3 V) allows the AD5247 to be used in portable
battery-operated applications.
Rev. F
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 ©2003–2012 Analog Devices, Inc. All rights reserved.







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AD5247 Даташит, Описание, Даташиты
AD5247* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
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EVALUATION KITS
AD5247 Evaluation Board
DOCUMENTATION
Application Notes
AN-1291: Digital Potentiometers: Frequently Asked
Questions
AN-686: Implementing an I2C® Reset
Data Sheet
AD5247: 128-Position I2C-Compatible Digital
Potentiometer Datasheet
User Guides
UG-397: Evaluation Board for the AD5247 Digital
Potentiometer
SOFTWARE AND SYSTEMS REQUIREMENTS
Digital Potentiometer Linux Driver
AD5247 Evaluation Software
DESIGN RESOURCES
AD5247 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
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SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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AD5247 Даташит, Описание, Даташиты
AD5247
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics—5 kΩ Version.................................. 3
Electrical Characteristics—10 kΩ, 50 kΩ, and 100 kΩ
Versions.......................................................................................... 4
Timing Characteristics—5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ
Versions.......................................................................................... 5
Absolute Maximum Ratings............................................................ 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Test Circuits..................................................................................... 12
REVISION HISTORY
5/12—Rev. E to Rev. F
Changes to Features and General Description Sections.............. 1
Changes to IDD Parameters, Table 1................................................ 3
Changes to IDD Parameters, Table 2................................................ 4
Changes to Figure 15........................................................................ 9
Changes to Figure 16...................................................................... 10
Removed Evaluation Board Section............................................. 17
Changes to Ordering Guide .......................................................... 18
1/11—Rev. D to Rev. E
Change to Table 1, Added Output Logic Low .............................. 3
Change to Table 2, Added Output Logic Low .............................. 4
3/10—Rev. C to Rev. D
Changes to Table 9 and Table 10................................................... 14
10/09—Rev. B to Rev. C
Changes to Zero-Scale Error (10 kΩ) Parameter, Table 2........... 4
Changes to Ordering Guide .......................................................... 18
Data Sheet
I2C Interface .................................................................................... 13
Theory of Operation ...................................................................... 14
Programming the Variable Resistor......................................... 14
Programming the Potentiometer Divider............................... 15
I2C-Compatible 2-Wire Serial Bus........................................... 15
Level Shifting for Bidirectional Interface ................................ 16
ESD Protection ........................................................................... 16
Terminal Voltage Operating Range ......................................... 16
Maximum Operating Current .................................................. 16
Power-Up Sequence ................................................................... 16
Layout and Power Supply Bypassing ....................................... 17
Constant Bias to Retain Resistance Setting............................. 17
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 18
3/07—Rev. A to Rev. B
Changes to General Description Section .......................................1
Added Table 8 ................................................................................. 13
Changes to I2C-Compatible 2-Wire Serial Bus Section ............ 15
Changes to Ordering Guide .......................................................... 18
7/06—Rev. 0 to Rev. A
Updated Format..................................................................Universal
Changes to Absolute Maximum Ratings section ..........................6
Changes to Ordering Guide .......................................................... 18
9/03—Revision 0: Initial Version
Rev. F | Page 2 of 20










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