参数资料
型号: EVAL-AD5246DBZ
厂商: Analog Devices Inc
文件页数: 1/16页
文件大小: 0K
描述: BOARD EVAL FOR AD5246DBZ
标准包装: 1
系列: *
128-Position I2C-Compatible
Digital Resistor
Data Sheet
Rev. C
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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.
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Tel: 781.329.4700
Fax: 781.461.3113 2003–2012 Analog Devices, Inc. All rights reserved.
FEATURES
128-position
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 –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
Automotive electronics adjustment
Gain control and offset adjustment
GENERAL OVERVIEW
The AD5246 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 variable
resistor. Available in four different end-to-end resistance values
(5 k, 10 k, 50 k, 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 resistance between the wiper
and either end point of the fixed resistor varies linearly with
respect to the digital code transferred into the RDAC1 latch.
Operating from a 2.7 V to 5.5 V power supply and consuming
0.9 A (3.3 V) allows for usage in portable battery-operated
applications.
1
The terms digital potentiometer, VR, and RDAC are used interchangeably
in this document.
FUNCTIONAL BLOCK DIAGRAM
I2C INTERFACE
WIPER
REGISTER
SDA
SCL
GND
VDD
A
W
B
03875-
001
Figure 1.
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