SX8661I07AULTRT Semtech, SX8661I07AULTRT Datasheet - Page 24
![no-image](/images/manufacturer_photos/0/5/595/semtech_sml.jpg)
SX8661I07AULTRT
Manufacturer Part Number
SX8661I07AULTRT
Description
IC, Capacitive Button Touch And Proximity Controller, 8 SENSOR, MLPQ-28
Manufacturer
Semtech
Datasheet
1.SX8661I07AULTRT.pdf
(88 pages)
Specifications of SX8661I07AULTRT
Controller Type
Capacitive Touch Screen
Ic Interface Type
I2C
Supply Voltage Range
2.7V To 3.6V
Operating Temperature Range
-40°C To +85°C
- Current page: 24 of 88
- Download datasheet (2Mb)
ADVANCED COMMUNICATIONS & SENSING
3.11 Processing
The first processing step of the raw ticks, coming out of the ASI, is low pass filtering to obtain an estimation of the
average capacitance: tick-ave (see Figure 19).
This slowly varying average is important in the detection of slowly changing environmental changes.
The difference of the tick average and the raw ticks, tick-diff, is a good estimation of rapid changing input
capacitances.
The tick-diff, tick-ave and the configuration parameters in the SPM are then processed and determines the sensor
information, I2C registers status and PWM control.
3.12 Configuration
Figure 20 shows the building blocks used for configuring the SX8661.
The default configuration parameters of the SX8661 are stored in the Quick Start Memory (QSM). This
configuration data is setup to a very common application for the SX8661 with 8 buttons. Without any programming
or host interaction the SX8661 will start up in the Quick Start Application.
The QSM settings are fixed and cannot be changed by the user.
Revision v3.2, January 2011
ASI
processing
compensation DCV
ticks (raw)
low pass
Low Power, Capacitive Button Touch and Proximity Controller
© 2011 Semtech Corp.
Figure 20
Figure 19
tick-ave
tick-diff
Configuration
24
Processing
(8 sensors) with LED Drivers and Analog Output
processing
SPM
PWM LED
controller
controller
GPIO
I2C
www.semtech.com
DATASHEET
SX8661
Related parts for SX8661I07AULTRT
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![sx8661](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
Low Power, Capacitive Button Touch And Proximity Controller 8 Sensors With Led Drivers And Analog Output
Manufacturer:
Semtech Corporation
Datasheet:
![SC4501STDEVB](/images/manufacturer_photos/0/5/595/semtech_tmb.jpg)
Part Number:
Description:
EVALUATION BOARD
Manufacturer:
Semtech
Datasheet:
![SC4518HEVB-2](/images/manufacturer_photos/0/5/595/semtech_tmb.jpg)
Part Number:
Description:
EVALUATION BOARD
Manufacturer:
Semtech
Datasheet:
![60KS200C](/images/manufacturer_photos/0/5/595/semtech_tmb.jpg)
Part Number:
Description:
VOLTAGE SUPPRESSOR, TRANSIENT SEMTECH
Manufacturer:
Semtech
Datasheet:
![6666](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
HIGH VOLTAGE CAPACITORS MONOLITHIC CERAMIC TYPE
Manufacturer:
Semtech Corporation
Datasheet:
![EZ1084CM](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
EZ1084CM5.0 AMP POSITIVE VOLTAGE REGULATOR
Manufacturer:
Semtech Corporation
Datasheet:
![EZ1587CM](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
3.0 AMP LOW DROPOUT POSITIVE VOLTAGE REGULATORS
Manufacturer:
Semtech Corporation
Datasheet:
![ACS8515](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
![SR3.3](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
RailClamp Low Capacitance TVS Diode Array
Manufacturer:
Semtech Corporation
Datasheet:
![SC1151CS](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
![SC1182CSW](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet:
![SC1185CSW](/images/manufacturer_photos/0/5/596/semtech_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Semtech Corporation
Datasheet: