器件名称: AD7156BCPZ-REEL
功能描述: Ultralow Power, 1.8 V, 3 mm
文件大小: 533.24KB 共28页
简 介:Ultralow Power, 1.8 V, 3 mm × 3 mm, 2-Channel Capacitance Converter AD7156
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)
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-todigital 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. By default, the AD7156 operates in standalone mode using the fixed power-up settings and indicates detection on two digital outputs. Alternativ……
