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SX8663 数据表(PDF) 1 Page - Semtech Corporation

部件名 SX8663
功能描述  Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output
PDF  64 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SX8663 数据表(HTML) 1 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
Rev5 4
th August 2011
© 2011 Semtech Corp.
www.semtech.com
1
SX8663
Capacitive Button Matrix (up to 36) and Proximity Controller
with Individual LED Drivers and Buzzer Output
GENERAL DESCRIPTION
The SX8663 is an ultra low power, fully integrated
12-channel
solution
for
capacitive
touch-button
matrix (up to 36 keys) and proximity applications.
Unlike many capacitive touch solutions, the SX8663
features dedicated capacitive sense inputs (that
requires no external components) in addition to 8
general purpose I/O ports (GPIO) which can be used
to drive up to 30 matrix LEDs (i.e. one per key). Each
of the on-chip GPIO/LED driver is equipped with
independent PWM source for enhanced visual effect
such as dimming, and breathing.
The SX8663 includes a capacitive 10 bit ADC analog
interface with automatic compensation up to 100pF.
The high resolution capacitive sensing supports a
wide variety of touch pad sizes and shapes and
allows capacitive buttons to be created using thick
overlay materials (up to 5mm) for an extremely
robust and ESD immune system design.
The SX8663 incorporates a versatile firmware that
was specially designed to simplify capacitive touch
solution design and offers reduced time-to-market.
Integrated
multi-time
programmable
memory
provides the ultimate flexibility to modify key firmware
parameters (gain, threshold, scan period, auto offset
compensation) in the field without the need for new
firmware development.
The SX8663 supports the 400 kHz I²C serial bus
data protocol and includes a field programmable
slave address. The tiny 5mm x 5mm footprint makes
it an ideal solution for portable, battery powered
applications where power and density are at a
premium.
TYPICAL APPLICATION CIRCUIT
SX8663
cap2
cap3
cap4
cap5
cap6
cap8
cap7
cap9
gnd
gpio5
gpio4
gpio3
gpio2
gpio1
gpio0
cap1
cap0
gpio6
cap10
analog sensor
interface
micro processor
RAM
ROM
NVM
I2C
GPIO controller
power management
clock
generation
RC
PWM LED
controller
bottom plate
HOST
30 Capacitive Matrix Buttons +Proximity
cap4
cap9
cap7
cap6
cap5
buzzer
KEY PRODUCT FEATURES
Complete Capacitive Touch-Button Solution
o
Up to 36 Matrix Buttons
o
Up to 36 LEDs Control for individual Visual Feedback
with Auto Lightening
o
Configurable Single or Continuous Fading Mode
o
256 steps PWM Linear and Logarithmic control
Proximity Sensing up to several centimeters
High Resolution Capacitive Sensing
o
Up to 100pF of Offset Cap. Compensation at Full
Sensitivity
o
Capable of Sensing up thru 5mm thick Overlay Materials
Support of buzzer for audible feedback
User-selectable Button Reporting Configuration
Extremely Low Power
o
8uA (typ) in Sleep Mode
o
100uA (typ) in Doze Mode (195ms)
o
460uA (typ) in Active Mode (30ms)
Programmable Scanning Period from 15ms to several seconds
Auto Offset Compensation
o
Eliminates false triggers due to environmental factors
(temperature, humidity)
o
Initiated on power-up and configurable intervals
Multi-Time In-Field Programmable Firmware Parameters
for Ultimate Flexibility
o
On-chip user programmable memory for fast, self
contained start-up
No External Components per Sensor Input
Internal Clock Requires No External Components
Differential Sensor Sampling for Reduced EMI
Optional 400 KHz I²C Interface with Programmable Address
-40°C to +85°C Operation
APPLICATIONS
Home Automation
White Goods
Printers
Notebook/Netbook/Portable/Handheld computers
Consumer Products, Instrumentation, Automotive
Mechanical Button Replacement
ORDERING INFORMATION
Part Number
Temperature
Range
Package
SX8663I08AWLTRT
1 -40°C to +85°C Lead Free MLPQ-W32
1 3000 Units/reel
* This device is RoHS/WEEE compliant and Halogen Free


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