器件名称: AD5161
功能描述: 256-Position SPI/I2C Selectable Digital Potentiometer
文件大小: 1002.34KB 共20页
简 介:256-Position SPI/I2C Selectable Digital Potentiometer AD5161
FEATURES
256-position End-to-end resistance 5 k, 10 k, 50 k, 100 k 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 A Wide operating temperature –40°C to +125°C SDO output allows multiple device daisy-chaining Evaluation board available
FUNCTIONAL BLOCK DIAGRAM
VDD SDI/SDA CLK/SCL DIS CS/AD0 SPI OR I2C INTERFACE W SDO/NC A
WIPER REGISTER
B
GND
Figure 1.
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
PIN CONFIGURATION
A 1 B 2 CS/ADO 3 SDI/SDA 5 10 W
AD5161
TOP VIEW SDO/NC 4 (Not to Scale) 7 GND 6 CLK/SCL
9 VDD 8 DIS
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 reg……
