FDC2112-Q1_16 Datasheet, PDF (1/60 Pages) Texas Instruments – Multi-Channel 12-Bit or 28-Bit Capacitance-to-Digital Converter

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FDC2112-Q1, FDC2114-Q1, FDC2212-Q1, FDC2214-Q1
SNOSCZ9 – MAY 2016
FDC2112-Q1, FDC2114-Q1, FDC2212-Q1, FDC2214-Q1 Multi-Channel 12-Bit or 28-Bit
Capacitance-to-Digital Converter (FDC) for Capacitive Sensing
1 Features
•1 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 f_SENSOR = 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
2 Applications
• EMI-Resistant Proximity Sensor
• EMI-Resistant Gesture Recognition
• EMI-Resistant Foreign Object Detection
• EMI-Resistant Rain / Fog / Ice / Snow Sensor
• Automotive Door / Kick Sensors
3 Description
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
FDC2112-Q1
WSON (12)
4.00 mm × 4.00 mm
FDC2114-Q1
WQFN (16)
4.00 mm × 4.00 mm
FDC2212-Q1
WSON (12)
4.00 mm × 4.00 mm
FDC2214-Q1
WQFN (16)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
40 MHz
L
Cap Sensor 0
Simplified Schematic
FDC2114 / FDC2214
CLKIN
Int. Osc.
3.3 V
VDD
GND
0.1 F 1 F
IN0A
Resonant
IN0B circuit driver
Core
SD
INTB
3.3 V
GPIO
GPIO
MCU
3.3 V
VDD
GND
L
Cap Sensor 3
IN3A
Resonant
IN3B circuit driver
ADDR
I²C
SDA
SCL
I²C
peripheral
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.