AD7148集成電路（IC）的傳感器電容式觸控規(guī)格書PDF中文資料

AD7148屬于集成電路（IC）的傳感器電容式觸控。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD7148傳感器，電容式觸控該系列產(chǎn)品提供操作電容式觸摸感應(yīng)傳感器所需的模擬激勵和測量資源，并以一種便于微控制器或類似器件使用的格式（例如 I2C 或 SPI 串行接口、UART 或簡單的邏輯信號）來傳遞由此產(chǎn)生的信息。這些器件常用于人機(jī)界面應(yīng)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