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| 型號： | EVAL-AD5247DBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD5247DBZ |
| 標準包裝： | 1 |
| 系列： | * |
128-Position I2C-Compatible
Digital Potentiometer
Data Sheet
Rev. F
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
Fax: 781.461.3113
2003–2012 Analog Devices, Inc. All rights reserved.
FEATURES
128 positions
End-to-end resistance: 5 k, 10 k, 50 k, 100 k
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 A 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
FUNCTIONAL BLOCK DIAGRAM
I2C INTERFACE
WIPER
REGISTER
SCL
SDA
GND
VDD
A
W
B
03876-
001
Figure 1.
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 k, 10 k, 50 k, and 100 k),
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
have three hard-coded slave address options available to allow
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 A (3.3 V) allows the AD5247 to be used in portable
battery-operated applications.
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