参数资料
型号: EVAL-AD5162SDZ
厂商: Analog Devices Inc
文件页数: 1/20页
文件大小: 0K
描述: BOARD EVAL FOR AD5162
标准包装: 1
主要目的: 数字电位器
嵌入式:
已用 IC / 零件: AD5162
主要属性: 2 通道,256 位置
次要属性: SPI 接口
已供物品: 板,CD
Dual, 256-Position, SPI
Digital Potentiometer
AD5162
Rev. C
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Tel: 781.329.4700
Fax: 781.461.3113
2003–2010 Analog Devices, Inc. All rights reserved.
FEATURES
2-channel, 256-position potentiometer
End-to-end resistance: 2.5 k, 10 k, 50 k, and 100 k
Compact 10-lead MSOP (3 mm × 4.9 mm) package
Fast settling time: t
S = 5 s typical on power-up
Full read/write of wiper register
Power-on preset to midscale
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 A maximum
Wide operating temperature: 40°C to +125°C
Evaluation board available
Qualified for automotive applications
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 DIAGRAM
A1
A = 0
A = 1
VDD
GND
SDI
CLK
CS
W1
WIPER
REGISTER 1
SPI INTERFACE
AD5162
04108-
0-
001
B1
W2
WIPER
REGISTER 2
B2
Figure 1.
GENERAL DESCRIPTION
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 end-to-
end resistance values (2.5 k, 10 k, 50 k, 100 k), this low
temperature coefficient device is ideal for high accuracy 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 RDAC latch.1
Operating from a 2.7 V to 5.5 V power supply and consuming
less than 6 A 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 the need for external SPI controllers, which
in turn enhances the time to market of systems. An AD5162
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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