8-CH CAPACITIVE TOUCH SENSOR WITH AUTO CALIBRATION
The IS31SE5100 is an ultra low power, fully integrated
8-channel solution for capacitive touch-buttons
applications. The chip allows electrodes to project
sense fields through any dielectric such as glass or
plastic. On-chip calibration logic continuously monitors
the environment and automatically adjusts on-and-off
threshold levels to prevent false sensor activation.
The IS31SE5100 supports the 400kHz I²C serial bus
data protocol and includes a field programmable slave
address. An INTB is generated when a button event
(touched or released) occurs, triggered and cleared
condition could be configured by setting the interrupt
IS31SE5100 is available in QFN-24 (4mm × 4mm) and
SSOP-24 packages. It operates from 2.7V to 5.5V over
the temperature range of -40°C to +85°C.
Complete eight sensors capacitive touch
controller for buttons
Auto offset compensation
Sensitivity adjustable by external capacitor or
Extremely low power optimized for portable
400kHz fast-mode I²C interface
8kV ESD HBM
Operating temperature TA = −40°C ~ +85°C
QFN-24 (4mm × 4mm) and SSOP-24 packages
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circuit
Note 1: The IC should be placed far away from the mobile antenna in order to prevent the EMI.
Note 2: The RS resistor should place as close as possible to reduce EMI.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 03/18/2013