2013年10月25日星期五

Embedded Systems Atmel improves touch chips

Embedded Systems Atmel improves touch chips

2013/10/24

AtmelMaxTouchAtmel has announced another generation of capacitive screen touch controllers, claiming them to be significantly better at dealing with big fingers, small styluses, water and gloved fingers.

Compared with its last generation, there are now 20 DACs taking data off 20 sense wires followed by parallel processing, compared with 18 wires multiplexed onto fewer ADCs before.

Having moved to a 130nm process for the new chips, there was also room to replace the old 8bit processor with a 32bit AVR core.

“It is a lot more power efficient and has a lot more processing capability for a lot more intelligence: large finger detection, palm rejection, water rejection and charger noise immunity” Atmel product marketing manager Tony Xia told Electronics Weekly. “And it can work with xSense, our scheme to use fine copper wires to replace ITO.”

As well as replacing increasingly hard to get ITO (indium tim oxide), xSense is claimed to reduce sense line impedance which allows the wire to be charged and read faster. With more sense cycles in a fixed time, statistical processing can reduce the effective signal-to-noise ratio.

Charger noise rejection, said Xia, is actually a combination of better numerical processing, actively hopping the read frequency away from the charger band, and analogue processing.

The new flagship device is the 642T offering 32×20 conductors, compared with 30×18 with former top model 540F.

For the touch aware, metrics are:
6.2in screen for Windows 8
8.3in for Android Jelly Bean
20-25mm hover detection range
1.0mm passive stylus
1.0mm active stulys (Atmel maXStylusTM GenII only)
2-3-4 multi-finger glove touch at 3mm, single finger glove touch at 5mm
No false touch with water drop
Single finger touch with water drops
Up to 22mm large finger touch detection
750kHz burst rate
Up to 150Hz report rate.

On water, Xai said: “Condensation with a finger, there is no impairement; wet hands from washing, there is no problem; up to a few drops, there is no false touch; and it automatically works after wiping.”

And on gloves: “A lot of smartphones today won’t work with gloves at all. Ours worked well with 20 different gloves we were presented with on one customer visit.“

And the problem with big fingers is, according to Xia, that they can be falsely detected as multiple small fingers grouped together.

Lastly, passive styluses no longer need to be conductive and in electrical contact with the user. “We tried it with a cheap mechanial pencil with an 0.5mm lead and it worked,” said Xia

Package is a 6x6x0.5mm 84XFLGA or 6x6x0.6mm 84UFBGA.



Welcome to SUV System Ltd!

SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.

We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.

SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com

Electronic Components distributor:http://www.suvsystem.com

Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html

IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html

LED Distributor:http://www.suvsystem.com/l/LED-1.html

Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html

Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html

Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html

Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html

SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc

we are focus on the following fields,and hope we can help you.


Digital Transistors TOSHIBA Diodes LINEAR IC Renesas parts IC Low Ohmic Resistors Voltage Regulators Transistors TDK IC AVX Resistors Thick Film Resistors HARRIS IC Chip Ferrite Beads Civil IC ELPIDA IC High Precision Resistors IR transistor Military IC Fairchild Semiconductor Transistors LITTELFUSE Diodes DIODES Transistors Atmel IC chip Filter saws components Ligitek LED Diodes Inc Freescale Semiconductor MURATA IC Chip Fuses Cypress IC NXP Diodes Multi-units Transistors Resistors ST Transistors VISHAY IC Diodes Thin Film Resistors Infineon Technologies Transistors AD IC NXP Transistors PANASONIC Resistors LED
http://www.suvsystem.com/a/6856.aspx

没有评论:

发表评论