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AD5162 Datasheet(PDF) 1 Page - Analog Devices

Part No. AD5162
Description  Dual 256-Position SPI Digital Potentiometer
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com

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Dual 256-Position SPI
Digital Potentiometer
Rev. A
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 owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
© 2003 Analog Devices, Inc. All rights reserved.
2-channel, 256-position
End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Compact MSOP-10 (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
Extra package address decode pin AD0
Computer software replaces µC in factory programming
Single supply: 2.7 V to 5.5 V
Low temperature coefficient: 35 ppm/°C
Low power: IDD = 6 µA max
Wide operating temperature: −40°C to +125°C
Evaluation board available
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
A = 0
A = 1
Figure 1.
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 different
end-to-end resistance values (2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ),
this low temperature coefficient device is ideal for high accu-
racy 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 RDAC1 latch.
1 The terms digital potentiometer, VR, and RDAC are used interchangeably.
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 any external SPI controllers, which in turn
enhances users’ systems time-to-market. An AD5162 evaluation
kit and software are available. The kit includes a cable and
instruction manual.

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