GENERAL DESCRIPTION

The AD7156 delivers a complete signal processing solution for capacitive sensors, featuring an ultralow power converter with fast response time.

The AD7156 uses an Analog Devices, Inc., capacitance-to digital converter (CDC) technology, which combines features important for interfacing to real sensors, such as high input sensitivity and high tolerance of both input parasitic ground capacitance and leakage current.

The integrated adaptive threshold algorithm compensates for any variations in the sensor capacitance due to environmental factors like humidity and temperature or due to changes in the

dielectric material over time.

FEATURES

Ultralow power

Power supply voltage: 1.8 V to 3.6 V

Operation power supply current: 70 μA typical

Power-down current: 2 μA typical

Fast response time

Conversion time: 10 ms per channel

Wake-up time from serial interface: 300 μs

Adaptive environmental compensation

2 capacitance input channels

Sensor capacitance (CSENS): 0 pF up to 13 pF

Sensitivity up to 3 fF

2 modes of operation

Standalone with fixed settings

Interfaced to a microcontroller for user-defined settings

2 detection output flags

2-wire serial interface (I2C-compatible)

Operating temperature: ?40°C to +85°C

10-lead LFCSP package (3 mm × 3 mm × 0.8 mm)

APPLICATIONS

Buttons and switches

Proximity sensing

Contactless switching

Position detection

Level detection

Portable products

EVAL-AD7156EBZ屬于開發(fā)板，套件，編程器 > 評估板 - 傳感器。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的EVAL-AD7156EBZ評估板 - 傳感器傳感器評估板是帶有元器件的電路板，用于提供特定集成電路或器件的工作實(shí)例。該系列評估板提供了各種傳感器的實(shí)例，包括加速度計(jì)、氣壓計(jì)、陀螺儀、溫度、濕度、光學(xué)、光、空氣質(zhì)量、電容、二氧化碳、指紋、編碼器、流體、氣體、紅外線、操縱桿和磁性，以及更多傳感器。