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SX8661Z Datasheet(PDF) 78 Page - Semtech Corporation

Part # SX8661Z
Description  Low Power, Capacitive Button Touch and Proximity Controller with LED Drivers and Analog Output
PDF  87 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX8661Z Datasheet(HTML) 78 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Revision v4.0, February 2016
© 2012 Semtech Corp.
www.semtech.com
78
SX8661Z
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
7
APPLICATION INFORMATION
7.1
Triple proximity reporting
This section describes the application corresponding to QSM settings
One AOI with seven LEDs are used. The intensity level of the LEDs show if proximity (medium intensity) or a
touch (maximum intensity) is detected. The LEDs are off in case no finger is present.
proximity
SX8661Z
cap2
cap3
cap4
cap5
cap6
cap7
gnd
gpo5
gpo4
gpo3
gpo2
gpo1
gnd
gpo0
analog
sensor
interface
micro
processor
RAM
ROM
NVM
I2C
GPIO
controller
power management
clock
generation
RC
PWM
LED
controller
bottom plate
cap0
cap1
d1
d0
d2
d3
d4
d6
mother board
Analog Output Interface
d5
Figure 60
Typical Application (one AOI), triple proximity reporting
In case of proximity all LEDs (d0 to d6) are enabled to a medium intensity.
If a sensor is touched then only the corresponding LED will light up with full intensity. The other LEDs remain at
medium intensity.



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