Capacitive sensing is a low-power, low-cost, high-resolution contactless sensing technique that can be applied to a variety of applications ranging from proximity detection to gesture recognition. The sensor in a capacitive sensing system is any metal or conductor, allowing for low cost and highly flexible system design.
●The main challenge limiting sensitivity in capacitive sensing applications is noise susceptibility of the sensors. With the FDC2x1x-Q1 innovative EMI resistant architecture, performance can be maintained even in presence of high-noise environments.
●The FDC2x1x-Q1 is a multi-channel family of noise- and EMI-resistant, high-resolution, high-speed capacitance-to-digital converters for implementing capacitive sensing solutions. The devices employ an innovative narrow-band based architecture to offer high rejection of noise and interferers while providing high resolution at high speed. The devices support a wide excitation frequency range, offering flexibility in system design.
● Qualified for Automotive Applications
● AEC-Q100 Qualified With the Following Results:
● Device Temperature Grade 1:–40°C to +125°C
●Ambient Operating Temperature Range
● Device HBM ESD Classification Level 2
● Device CDM ESD Classification Level C5
● EMI-Resistant Architecture
● Maximum Output Rates (One Active Channel):
● 13.3 ksps (FDC2112-Q1, FDC2114-Q1)
● 4.08 ksps (FDC2212-Q1, FDC2214-Q1)
● Maximum Input Capacitance: 250 nF (at 10 kHz
●with 1-mH inductor)
● Sensor Excitation Frequency: 10 kHz to 10 MHz
● Number of Channels: 2, 4
● Resolution: Up to 28 bits
● RMS noise: 0.3 fF at 100 sps and fSENSOR = 5MHz
● Supply Voltage: 2.7 V to 3.6 V
● Power Consumption: Active: 2.1 mA
● Low-Power Sleep Mode: 35 µA
● Shutdown: 200 nA
● Interface: I2C
● Temperature Range: –40°C to +125°C
