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PDF SX8661Z Data sheet ( Hoja de datos )
| Número de pieza | SX8661Z | |
| Descripción | Capacitive Button Touch and Proximity Controller | |
| Fabricantes | Semtech | |
| Logotipo |  |
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SX8661Z
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
GENERAL DESCRIPTION
The SX8661Z is an ultra low power, fully integrated
8-channel solution for capacitive touch-button and
proximity detection applications. Unlike many
capacitive touch solutions, the SX8661Z features
dedicated capacitive sense inputs (that requires no
external components) in addition to 8 general
purpose I/O ports (GPIO). Each of the 8 on-chip
GPIO/LED driver is equipped with independent PWM
source for enhanced visual effect such as dimming,
and breathing.
The SX8661Z 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 SX8661Z 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 SX8661Z supports the 400 kHz I²C serial bus
data protocol and includes a field programmable
slave address. The tiny 4mm x 4mm footprint makes
it an ideal solution for portable, battery powered
applications where power and density are at a
premium.
TYPICAL APPLICATION CIRCUIT
Analog Output Interface
mother board
cap0
cap1
cap2
cap3
cap4
cap5
cap6
cap7
analog
sensor
interface
clock
generation
RC
SX8661Z gnd
PWM
LED
controller
gpo5
gpo4
power management
gpo3
micro
processor
RAM
ROM
GPIO
controller
NVM
I2C
gpo2
gnd
gpo1
gpo0
bottom plate
d6
d5
d4
d3
d2
d1
d0
KEY PRODUCT FEATURES
Complete 8 Sensors Capacitive Touch-Button Solution
o Up to 8 LED Drivers 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 centimetres
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
Up to 2 Analog Output Interfaces (AOI-A and AOI-B)
o Enable button detection thru host’s ADC
Support of buzzer for audible feedback
User-selectable Button Reporting Configuration
o Report Single or Report Strongest
Extremely Low Power
o 8uA (typ) in Sleep Mode
o 70uA (typ) in Doze Mode (195ms)
o 200uA (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
LCD TVs, Monitors
White Goods
Notebook/Netbook/Portable/Handheld computers
Consumer Products, Instrumentation, Automotive
Mechanical Button Replacement
ORDERING INFORMATION
Part Number Temperature
Range
Package
SX8661I07ZULTRT1 -40°C to +85°C Lead Free MLPQ-UT28
1 3000 Units/reel
* This device is RoHS/WEEE compliant and Halogen Free
Revision v4.0, February 2016
© 2012 Semtech Corp.
1
www.semtech.com
1 page  
SX8661Z
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
1 GENERAL DESCRIPTION
1.1 Pin Diagram
28 27 26 25 24 23 22
cap1 1
cap2 2
cap3 3
cap4 4
cap5 5
cap6 6
cap7 7
21 gnd
SX8661Z
20 gpio5
19 gpio4
Top View
18 gpio3
17 gpio2
bottom ground pad
16 gnd
15 gpio1
8 9 10 11 12 13 14
Figure 1 Pinout Diagram
1.2 Marking information
ZRA3
yyww
xxxxx
R07
yyww = Date Code
xxxxx = Semtech lot number
R07 = Semtech Code
Figure 2 Marking Information
Revision v4.0, February 2016
© 2012 Semtech Corp.
5
www.semtech.com
5 Page 
SX8661Z
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Parameter
I2C Timing Specifications (i)
SCL clock frequency
SCL low period
SCL high period
Data setup time
Data hold time
Repeated start setup time
Start condition hold time
Stop condition setup time
Bus free time between stop and start
Input glitch suppression
Symbol
fSCL
tLOW
tHIGH
tSU;DAT
tHD;DAT
tSU;STA
tHD;STA
tSU;STO
tBUF
tSP
Conditions
Min.
Typ. Max.
Unit
400 KHz
1.3 us
0.6 us
100 ns
0 ns
0.6 us
0.6 us
0.6 us
500 us
50 ns
Table 6 I2C Timing Specification
Notes:
(i) All timing specifications, Figure 4 and Figure 5, refer to voltage levels (VIL, VIH, VOL) defined in Table 5.
The interface complies with slave F/S mode as described by NXP: “I2C-bus specification, Rev. 03 - 19 June 2007”
SDA
70%
30%
SCL
SDA
70%
tSU;STA tHD;STA
tSU;STO
Figure 4 I2C Start and Stop timing
tBUF
70%
30%
SCL
Revision v4.0, February 2016
70%
30%
tLOW
tHIGH
tHD;DAT tSU;DAT
Figure 5 I2C Data timing
tSP
© 2012 Semtech Corp.
11
www.semtech.com
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SX8661Z.PDF ] | |
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