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AD5161BRM50 Folha de dados(PDF) 1 Page - Analog Devices

Nome de Peças AD5161BRM50
Descrição Electrónicos  256-Position SPI/I2C Selectable Digital Potentiometer
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
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256-Position SPI/I2C Selectable
Digital Potentiometer
AD5161
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
© 2003 Analog Devices, Inc. All rights reserved.
FEATURES
256-position
End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Compact MSOP-10 (3 mm × 4.9 mm) package
Pin selectable SPI/I2C compatible interface
Extra package address decode pin AD0
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/°C
Low power, IDD = 8 µA
Wide operating temperature –40°C to +125°C
SDO output allows multiple device daisy-chaining
Evaluation board available
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
GENERAL OVERVIEW
The AD5161 provides a compact 3 mm × 4.9 mm packaged
solution for 256-position adjustment applications. These devices
perform the same electronic adjustment function as mechanical
potentiometers or variable resistors, with enhanced resolution,
solid-state reliability, and superior low temperature coefficient
performance.
The wiper settings are controllable through a pin selectable SPI
or I2C compatible digital interface, which can also be used to
read back the wiper register content. When the SPI mode is
used, the device can be daisy-chained (SDO to SDI), allowing
several parts to share the same control lines. In the I2C mode,
address pin AD0 can be used to place up to two devices on the
same bus. In this same mode, command bits are available to
reset the wiper position to midscale or to shut down the device
into a state of zero power consumption.
Operating from a 2.7 V to 5.5 V power supply and consuming
less than 5 µA allows for usage in portable battery-operated
applications.
FUNCTIONAL BLOCK DIAGRAM
WIPER
REGISTER
SDI/SDA
CLK/SCL
DIS
CS/AD0
GND
SDO/NC
VDD
A
W
B
SPI OR I2C
INTERFACE
Figure 1.
PIN CONFIGURATION
1
2
3
4
5
10
9
8
7
6
A
B
CS/ADO
SDO/NC
SDI/SDA
DD
AD5161
TOP VIEW
(Not to Scale)
W
V
DIS
GND
CLK/SCL
Figure 2.
Note:
The terms digital potentiometer, VR, and RDAC are used interchangeably.
Purchase of licensed I
2C components of Analog Devices or one of its sublicensed
Associated Companies conveys a license for the purchaser under the Philips I
2C
Patent Rights to use these components in an I
2C system, provided that the system
conforms to the I
2C Standard Specification as defined by Philips.


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