AD7142集成电路（IC）的ADC/DAC-特殊用途规格书PDF中文资料

AD7142属于集成电路（IC）的ADC/DAC-特殊用途。由亚德诺半导体技术有限公司制造生产的AD7142ADC/DAC - 特殊用途该产品族中的产品可用于模拟和数字表示的信息转换，适用于特定用例，或集成了通用数据转换器中不常见的其他功能。例如针对超声或汽车雷达应用集成了低噪声放大器和可变增益级的器件、注重音频和视频的产品、在段码式显示器上集成显示测量值功能的器件、集成输入输出电气隔离的器件等。

GENERAL DESCRIPTION

The AD7142 and AD7142-1 are integrated capacitance-to-digital converters (CDCs) with on-chip environmental calibration for use in systems requiring a novel user input method. The AD7142 and AD7142-1 can interface to external capacitance sensors implementing functions such as capacitive buttons, scroll bars, or wheels.

FEATURES

Programmable capacitance-to-digital converter

36 ms update rate (@ maximum sequence length)

Better than 1 fF resolution

14 capacitance sensor input channels

No external RC tuning components required

Automatic conversion sequencer

On-chip automatic calibration logic

Automatic compensation for environmental changes

Automatic adaptive threshold and sensitivity levels

On-chip RAM to store calibration data

SPI®-compatible serial interface (AD7142)

I2C®-compatible serial interface (AD7142-1)

Separate VDRIVE level for serial interface

Interrupt output and GPIO

32-lead, 5 mm x 5 mm LFCSP_VQ

2.6 V to 3.6 V supply voltage

Low operating current

Full power mode: less than 1 mA

Low power mode: 50 μA

APPLICATIONS

Personal music and multimedia players

Cell phones

Digital still cameras

Smart hand-held devices

Television, A/V, and remote controls

Gaming consoles