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AD5248BRMZ2.5-RL7 Datasheet(PDF) 1 Page - Analog Devices

No. de pieza AD5248BRMZ2.5-RL7
Descripción Electrónicos  Dual, 256-Position, I2C-Compatible Digital Potentiometers
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

AD5248BRMZ2.5-RL7 Datasheet(HTML) 1 Page - Analog Devices

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Dual, 256-Position, I2C-Compatible
Digital Potentiometers
Data Sheet
AD5243/AD5248
Rev. B
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
www.analog.com
Fax: 781.461.3113
©2004–2012 Analog Devices, Inc. All rights reserved.
FEATURES
2-channel, 256-position potentiometers
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
Extra package address decode pins: AD0 and AD1 (AD5248 only)
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
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
FUNCTIONAL BLOCK DIAGRAMS
A1
VDD
GND
SDA
SCL
W1
WIPER
REGISTER 1
PC INTERFACE
AD5243
B1
A2
W2
WIPER
REGISTER 2
B2
Figure 1. AD5243
VDD
GND
SDA
SCL
AD0
AD1
W1
RDAC
REGISTER 1
ADDRESS
DECODE
SERIAL INPUT
REGISTER
AD5248
B1
W2
RDAC
REGISTER 2
B2
/ 8
Figure 2. AD5248
GENERAL DESCRIPTION
The AD5243 and AD5248 provide a compact 3 mm × 4.9 mm
packaged solution for dual, 256-position adjustment applications.
The AD5243 performs the same electronic adjustment function as
a 3-terminal mechanical potentiometer, and the AD5248 performs
the same adjustment function as a 2-terminal variable resistor.
Available in four end-to-end resistance values (2.5 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. The AD5248 has extra package
address decode pins, AD0 and AD1, allowing multiple parts to
share the same I2C, 2-wire bus on a PCB. 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
Operating from a 2.7 V to 5.5 V power supply and consuming
less than 6 µA allows the AD5243/AD5248 to be used in portable
battery-operated applications.
For applications that program the AD5243/AD5258 at the factory,
Analog Devices, Inc., offers device programming software running
on Windows® NT/2000/XP operating systems. This software
effectively replaces the need for external I2C controllers, which
in turn enhances the time to market of systems. An AD5243/
AD5248 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.


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