20-inch Automotive Touchscreens Enabled by New Single-chip maXTouch® Touchscreen Controllers from Microchip
December 05 2018 - 8:09AM
Even as touchscreen displays in the car grow larger, drivers expect
screens to operate with the same touch experience as mobile phones.
However, screens in automobiles need to meet stringent head impact
and vibration tests, and consequently have thicker cover lenses
that potentially impact the touch interface performance. As screens
get larger, they are also more likely to interfere with other
frequencies such as AM radio and car access systems. All of these
factors become a major challenge in the design of modern automotive
capacitive touch systems. A new family of single-chip
maXTouch touchscreen controllers from Microchip
Technology Inc.
(Nasdaq: MCHP) was designed to
address these issues for screens up to 20 inches in size.
The MXT2912TD-A, with nearly 3,000 touch sensing nodes, and
MXT2113TD-A, supporting more than 2,000 nodes, bring consumers the
touchscreen user experience they expect in vehicles. These new
devices build upon Microchip’s existing maXTouch touchscreen
technology that is widely adopted by manufacturers worldwide.
Microchip’s latest solutions offer superior signal-to-noise
capability to address the requirements of thick lenses, even
supporting multiple finger touches through thick gloves and in the
presence of moisture.
As automakers use screens to replace mechanical switches on the
dash for sleeker interior designs, safe and reliable operation
becomes even more critical. The MXT2912TD and MXT2113TD devices
incorporate self- and sensor-diagnostic functions, which constantly
monitor the integrity of the touch system. These smart diagnostic
features support the Automotive Safety Integrity Level (ASIL)
classification index as defined by the ISO 26262 Functional Safety
Specification for Passenger Vehicles.
The new devices feature technology that enables adaptive touch
utilizing self-capacitance and mutual-capacitance measurements, so
all touches are recognized and false touch detections are avoided.
They also feature Microchip’s proprietary new signal shaping
technology that significantly lowers emissions to help large
touchscreens using maXTouch controllers meet CISPR-25 Level 5
requirements for electromagnetic interference in automobiles. The
new touch controllers also meet automotive temperature grade 3 (-40
to +85°C) and grade 2 (-40 to +105°C) operating ranges and are
AEC-Q100 qualified.
With the addition of the new maXTouch touchscreen controllers,
Microchip provides full scalability to customers, offering the
industry’s only complete and growing portfolio of
automotive-qualified touchscreen controllers for the use of various
screen sizes. Developers can design multiple platforms from small
touchpads to large displays in the same development environment
with the same host software interface and quality user experience.
This ultimately shortens design time while lowering system and
development costs.
“Microchip has a long and strong history in the automotive
industry. Serving our customers is about more than providing
an integrated circuit; it’s about being a partner throughout the
very complex supply chain of a touch system, so the display, the
sensor and all communications work as expected,” said Fanie
Duvenhage, vice president of Microchip’s Human Machine Interface
business unit. “The new devices build on this success and address
the current trends of increasing screen sizes and reduced finger
touch separation in vehicles.”
Development ToolsEight dedicated application
and sensor design centers around the world help Microchip customers
and partners accelerate the process of bringing their maXTouch
technology designs to market. Microchip’s maXTouch technology
specialists are working with all major sensor, display and touch
module manufacturers.
An evaluation kit is available for each of the parts in the new
maXTouch touchscreen controller family. The kit includes a Printed
Circuit Board (PCB) with the maXTouch touchscreen controller, a
touch sensor on a clear glass lens, the Flat Printed Circuit (FPC)
to connect to the sensor display, a converter PCB to connect the
kit to the host computer via USB, as well as cables, software and
documentation. All parts are also compatible with maXTouch Studio,
a full software development environment to support the evaluation
of maXTouch touchscreen controllers.
Pricing and Availability The MXT2912TD-A and
MXT2113TD-A devices are available now in sampling and volume
quantities in LQFP176 and LQFP144 packages, respectively. Pricing
is available upon request. For additional information, contact a
Microchip sales representative, authorized worldwide distributor or
visit Microchip’s website. To purchase an evaluation kit, visit our
purchasing portal or contact a Microchip
authorized distributor.
ResourcesHigh-res images available through
Flickr or editorial contact (feel free to publish):
- Application image:
www.flickr.com/photos/microchiptechnology/30944166187/sizes/l
- Chip image:
www.flickr.com/photos/microchiptechnology/30944172517/sizes/l
About Microchip TechnologyMicrochip Technology
Inc. is a leading provider of microcontroller, analog, FPGA,
connectivity and power management semiconductors. Its easy-to-use
development tools and comprehensive product portfolio enable
customers to create optimal designs which reduce risk while
lowering total system cost and time to market. The company’s
solutions serve more than 130,000 customers across the industrial,
automotive, consumer, aerospace and defense, communications and
computing markets. Headquartered in Chandler, Arizona, Microchip
offers outstanding technical support along with dependable delivery
and quality. For more information, visit the Microchip website at
www.microchip.com.
Note: The Microchip name and logo, the Microchip logo and
maXTouch are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries. All other
trademarks mentioned herein are the property of their respective
companies.
Editorial
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Brian Thorsen |
1-888-624-7435 |
480-792-7182 |
|
brian.thorsen@microchip.com |
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