Part # AD7156 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7156 Ultralow Power 1.8 V 3 mm x 3 mm 2-Channel Capacitance Converter Data Sheet (Rev. 0)

Part Details:

Ultralow Power, 1.8 V, 3 mm × 3 mm, 2-Channel Capacitance Converter AD7156 FEATURES GENERAL DESCRIPTION Ultralow power The AD7156 delivers a complete signal processing solution for Power supply voltage: 1.8 V to 3.6 V capacitive sensors, featuring an ultralow power converter with Operation power supply current: 70 A typical fast response time. Power-down current: 2 A typical The AD7156 uses an Analog Devices, Inc., capacitance-to- Fast response time digital converter (CDC) technology, which combines features Conversion time: 10 ms per channel important for interfacing to real sensors, such as high input Wake-up time from serial interface: 300 s sensitivity and high tolerance of both input parasitic ground Adaptive environmental compensation capacitance and leakage current. 2 capacitance input channels Sensor capacitance (C The integrated adaptive threshold algorithm compensates for SENS): 0 pF up to 13 pF Sensitivity up to 3 fF any variations in the sensor capacitance due to environmental 2 modes of operation factors like humidity and temperature or due to changes in the Standalone with fixed settings dielectric material over time. Interfaced to a microcontroller for user-defined settings By default, the AD7156 operates in standalone mode using the 2 detection output flags fixed power-up settings and indicates detection on two digital 2-wire serial interface (I2C-compatible) outputs. Alternatively, the AD7156 can be interfaced to a micro- Operating temperature: -40°C to +85°C controller via the serial interface, the internal registers can be 10-lead LFCSP package (3 mm × 3 mm × 0.8 mm) programmed with user-defined settings, and the data and status APPLICATIONS can be read from the part. Buttons and switches The AD7156 operates with a 1.8 V to 3.6 V power supply. It is Proximity sensing specified over the temperature range of -40°C to +85°C. Contactless switching Position detection Level detection Portable products FUNCTIONAL BLOCK DIAGRAM VDD CIN1 C

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AD7156.pdf Datasheet