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AD5246BKS50-RL7 Datasheet

  • AD5246BKS50-RL7

  • 128-Position I2C Compatible Digital Resistor

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128-Position I
2
C Compatible
Digital Resistor
AD5246
FEATURES
128-position
End-to-end resistance 5 k鈩? 10 k鈩? 50 k鈩? 100 k鈩?/div>
Ultracompact SC70-6 (2 mm 脳 2.1 mm) package
I
2
C廬 compatible interface
Full read/write of wiper register
Power-on preset to midscale
Single supply 2.7 V to 5.5 V
Low temperature coefficient 45 ppm/擄C
Low power, I
DD
= 3 碌A(chǔ) typical
Wide operating temperature 鈥?0擄C to +125擄C
Evaluation board available
FUNCTIONAL BLOCK DIAGRAM
V
DD
SCL
SDA
I
2
C INTERFACE
A
W
B
03875-0-001
WIPER
REGISTER
GND
Figure 1.
APPLICATIONS
Mechanical potentiometer replacement in new designs
Transducer adjustment of pressure, temperature, position,
chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
1
Note: The terms digital potentiometer, VR, and RDAC are used
interchangeably in this document.
GENERAL OVERVIEW
The AD5246 provides a compact 2 mm 脳 2.1 mm packaged
solution for 128-position adjustment applications. This device
performs the same electronic adjustment function as a variable
resistor. Available in four different end-to-end resistance values
(5 k鈩? 10 k鈩? 50 k鈩? 100 k鈩?, these low temperature coefficient
devices are ideal for high accuracy and stability variable
resistance adjustments.
The wiper settings are controllable through the I
2
C compatible
digital interface, which can also be used to read back the present
wiper register control word. 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
1
latch.
Operating from a 2.7 V to 5.5 V power supply and consuming
3 碌A(chǔ) allows for usage in portable battery-operated applications.
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 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. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
漏 2003 Analog Devices, Inc. All rights reserved.

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