Overview

　　The FDC2114/2214 EVM demonstrates the use of capacitive sensing technology to sense and measure the presence or position of target objects. The EVM contains two example LC tank sensors that are connected to the FDC2114/2214 input channels. The latter is controlled by an MSP430, which interfaces to a host computer.

　　The FDC2114/2214EVM includes two example PCB sensors. Each sensor consists of a single-layer capacitor plate, a 33pF 1% COG/NP0 capacitor, and a 18μH connected in parallel to form an LC tank. PCB perforations allow separation of the sensor coils or the microcontroller, so that custom sensors or a different microcontroller can be connected.

　　 Features

　　?EMI-resistant architecture

　　?Maximum output rates (one active channel):

　　–13.3kSPS (FDC2112, FDC2114)

　　–4.08kSPS (FDC2212, FDC2214)

　　?Maximum input capacitance: 250nF (at 10kHz with 1mH inductor)

　　?Sensor excitation frequency: 10kHz to 10MHz

　　?Number of channels: 2, 4

　　?Resolution: up to 28 bits

　　?System noise floor: 0.3fF at 100SPS

　　?Supply voltage: 2.7V to 3.6V

　　?Power consumption: active: 2.1mA

　　?Low-power sleep mode: 35μA

　　?Shutdown: 200nA

　　?Interface: I2C

　　?Temperature range:–40°C to +125°C

　　? 李 进

　　? 深圳博瑞图电子科技有限公司

　　?MOB :

　　?qq : 52519094

　　?ADD :深圳市福田区中航路都会轩3305

　　?EMAIL : lijin810230@163.COM

　　? 网 址：