3.3 V

3.3 V

3.3 V

3.3 V

I2C

Peripheral

MCU

GND

VDD

ENVIRONMENTAL

SENSOR

LIQUID

SENSOR

LEVEL

SENSOR

OFFSET

& GAIN

CALIBRATION

EXCITATION

FDC1004

CAPACITANCE

TO DIGITAL

CONVERTER

CHA

MUX

CHB

MUX

CAPDAC

SHLD1

SHLD2

CIN1

CIN2

CIN3

CIN4

I

CONFIGURATION & DATA

REGISTERS

SCL

SDA

GND

VDD

CHA

CHB

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Folder

Sample &

Buy

Technical

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Reference

Design

FDC1004

SNOSCY5B – AUGUST 2014 – REVISED APRIL 2015

FDC1004 4-Channel Capacitance-to-Digital Converter for Capacitive Sensing Solutions

1 Features

3 Description

Capacitive sensing with grounded capacitor sensors

1

•

Input Range: ±15 pF

is a very low-power, low-cost, high-resolution contact-

•

Measurement Resolution: 0.5 fF

less sensing technique that can be applied to a

•

Maximum Offset Capacitance: 100 pF

variety of applications ranging from proximity sensing

and gesture recognition to material analysis and

•

Programmable Output Rates: 100/200/400 S/s

remote

liquid

level

sensing.

The

sensor

in

a

•

Maximum Shield Load: 400 pF

capacitive sensing system is any metal or conductor,

•

Supply Voltage: 3.3 V

allowing for low cost and highly flexible system

design.

•

Temp Range: –40° to 125°C

•

Current Consumption:

The

FDC1004

is

a

high-resolution,

4-channel

capacitance-to-digital

converter

for

implementing

–

Active: 750 µA

capacitive sensing solutions. Each channel has a full

–

Standby: 29 µA

scale range of ±15 pF and can handle a sensor offset

•

capacitance of up to 100 pF, which can be either

•

Number of Channels: 4

programmed

internally

or

can

be

an

external

capacitor for tracking environmental changes over

time and temperature. The large offset capacitance

2 Applications

capability allows for the use of remote sensors.

•

Proximity Sensor

The FDC1004 also includes shield drivers for sensor

•

Gesture Recognition

shields, which can reduce EMI interference and help

•

Automotive Door / Kick Sensors

focus the sensing direction of a capacitive sensor.

•

Automotive Rain Sensor

The small footprint of the FDC1004 allows for use in

space-constrained applications. The FDC1004 is

•

Remote and Direct Liquid Level Sensor

available in a 10-pin WSON and VSSOP package

•

High-resolution Metal Profiling

•

Rain / Fog / Ice / Snow Sensor

MCU.

•

Material Size Detection

Device Information(1)

•

Material Stack Height

PART NUMBER

PACKAGE

BODY SIZE (NOM)

WSON (DSC)

3.0 mm x 3.0 mm

FDC1004

VSSOP (DGS)

3.0 mm x 3.0 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

4 Typical Application

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.