AD7148集成电路（IC）的传感器电容式触控规格书PDF中文资料

AD7148属于集成电路（IC）的传感器电容式触控。由亚德诺半导体技术有限公司制造生产的AD7148传感器，电容式触控该系列产品提供操作电容式触摸感应传感器所需的模拟激励和测量资源，并以一种便于微控制器或类似器件使用的格式（例如 I2C 或 SPI 串行接口、UART 或简单的逻辑信号）来传递由此产生的信息。这些器件常用于人机界面应用。

GENERAL DESCRIPTION

The AD7148 is designed for use with capacitance sensors implementing functions such as buttons, scroll bars, and wheels. The sensors need only one PCB layer, enabling ultrathin applications.

FEATURES

Programmable capacitance-to-digital converter (CDC)

Femtofarad (fF) resolution

8 capacitance sensor inputs

25 ms update rate, all 8 sensor inputs

No external RC components required

Automatic conversion sequencer

On-chip automatic calibration logic

Automatic compensation for environmental changes

Automatic adaptive threshold and sensitivity levels

Register map compatible with AD7143

On-chip RAM to store calibration data

I2C-compatible serial interface

Separate VDRIVE level for serial interface

Interrupt output

16-lead, 4 mm × 4 mm LFCSP

2.6 V to 3.3 V supply voltage

Low operating current

Full power mode: 1 mA

Low power mode: 21.5 μA

APPLICATIONS

Cell phones

Personal music and multimedia players

Smart handheld devices

Television, A/V, and remote controls

Gaming consoles

Digital still cameras