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| 型号： | EVAL-AD5245EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR AD5245 |
| 标准包装： | 1 |
| 主要目的： | 数字电位器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD5245 |
| 主要属性： | 1 通道，256 位置 |
| 次要属性： | I²C 接口 |
| 已供物品： | 板 |
256-Position I2C-Compatible
Digital Potentiometer
AD5245
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
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
2006 Analog Devices, Inc. All rights reserved.
FEATURES
256-position
End-to-end resistance 5 k, 10 k, 50 k, 100 k
Compact SOT-23-8 (2.9 mm × 3 mm) package
Fast settling time: tS = 5 s typ on power-up
Full read/write of wiper register
Power-on preset to midscale
Extra package address decode pin AD0
Computer software replaces C in factory programming
applications
Single supply: 2.7 V to 5.5 V
Low temperature coefficient 45 ppm/°C
Low power: IDD = 8 A
Wide operating temperature: –40°C to +125°C
Evaluation board available
APPLICATIONS
Mechanical potentiometer replacement in new designs
LCD panel VCOM adjustment
LCD panel brightness and contrast control
Transducer adjustment of pressure, temperature, position,
chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
FUNCTIONAL BLOCK DIAGRAM
I2C INTERFACE
WIPER
REGISTER
SCL
SDA
AD0
GND
VDD
A
W
B
POR
034
36
-0
01
Figure 1.
PIN CONFIGURATION
A
B
AD0
SDA
1
2
3
4
5
8
7
6
W
VDD
GND
SCL
AD5245
TOP VIEW
(Not to Scale)
03
43
6-
00
2
Figure 2.
GENERAL DESCRIPTION
The AD5245 provides a compact 2.9 mm × 3 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 an I2C-compatible
digital interface, which can also be used to read back the wiper
register content. AD0 can be used to place up to two devices on
the same bus. 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 8 A allows usage in portable battery-operated
applications.
Note that the terms digital potentiometer, VR, and RDAC are
used interchangeably.
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