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Atmel Addresses Vehicle Safety With Introduction of New Highly Integrated Application-specific LF Antenna-driver IC for Automotive Tire Pressure Monitoring Applications

Convergence Show, Detroit (ots/PRNewswire)

- Industry's First Device with Antenna Driver Stage Driven by an
External Microcontroller
Atmel(R) Corporation (Nasdaq: ATML), a global leader in the
development and fabrication of advanced semiconductor solutions,
announced today the availability of its new 125-kHz BCDMOS antenna
driver IC ATA5275 designed for automotive Pressure-on-Demand (POD)
systems in Tire-Pressure Monitoring System (TPMS) applications. POD
systems provide the automotive industry's highest flexibility during
wheel change and for TPMS system operation. Also, they help to reduce
RF noise since the driver stage is placed together with the antenna
inside of the wheel well. The ATA5275 features highest integration
for embedded automotive systems and maximum performance. Due to its
self-tuning resonance capability, the antenna is able to operate with
maximum voltage, maximum current and maximum field strength. The
ATA5275 extends Atmel's broad TPMS product portfolio, which already
includesUHF transmitter and receiver ICs, LF receiver and antenna
driver ICs as well as microcontroller devices to design complete TPMS
systems.
Comparable solutions are usually designed as discrete solutions,
where the system is not integrated, requiring more design effort,
more external devices and a higher bill of materials. The new ATA5275
is the first non-discrete antenna driver IC available on the market,
making TPMS/POD designs simpler and more cost-effective. The device
is highly integrated, and also provides a microcontroller interface
(bi-directional K-line interface) that allows the transfer of
diagnostic data.
No external quartz is needed as clock reference, allowing the
clock to be available on-chip along with the LC antenna circuit,
enabling the system engineer to design a trigger station with a high
Quality factor. For the self-tuning resonance to the antenna, a PLL
circuit maintains the driver output frequency close to the antenna
tank resonance frequency. When the antenna half bridge is activated,
the VCO tracks the antenna current by means of its zero crossing
detection to keep the VCO centered to the antenna tank resonant
frequency. This is accomplished by means of a connection to the sense
pin from a current shunt. The VCO deviates less than about 1.4%
compared to the antenna tank resonance frequency, depending on the
antenna quality. Due to this self-tuning feature, the antenna
operates with maximum performance.
The new antenna driver IC provides several diagnostic features
such as short circuit, open circuit and over temperature detection.
The IC is load-dump protected up to 45 V and operates directly from
the car battery. The ATA5275's time-out interface supervisor serves
to avoid unintended continuous transmission in case of line errors.
The temperature range is -40 degree Celsius/F to +105 degree
Celsius/221 degree F.
Samples of the antenna driver IC ATA5275 in QFN20 packages are
available now. Pricing starts at 1.94 US$ (10 k).
Footnote
     BCDMOS = Mixed technology combining Bipolar, CMOS and DMOS components
     LF = Low Frequency
     PEG = Passive Entry Go
     PLL = Phase Locked Loop
     TPMS = Tire Pressure Monitoring Systems
     UHF = Ultra High Frequency
     VCO = Voltage Controlled Oscillator
About Atmel
Atmel is a worldwide leader in the design and manufacture of
microcontrollers, advanced logic, mixed-signal, nonvolatile memory
and radio frequency (RF) components. Leveraging one of the industry's
broadest intellectual property (IP) portfolios, Atmel is able to
provide the electronics industry with complete system solutions.
Focused on consumer, industrial, security, communications, computing
and automotive markets, Atmel ICs can be found Everywhere You
Are(SM).
NOTE: Atmel(R), logo and combinations thereof, are the registered
trademarks, and Everywhere You Are(SM) is the trademark of Atmel
Corporation or its subsidiaries. Other terms and product names may be
trademarks of others.
    Information:
    Atmel's antenna-driver IC ATA5275 information may be retrieved at:
     http://www.atmel.com/dyn/products/product_card.asp?part_id=3506
    Press Contacts:
    Dr. Susanne van Clewe, Marcom Manager Communications and Automotive
     Products
    Phone: +49-7131-67-2081, Email:   susanne.van-clewe@hno.atmel.com
    Clive Over, Director of Press Relations - USA and Asia
     Phone: +1-408-451-2855, Email:   cliveover@atmel.com
    Veronique Sablereau, Corporate Communications Manager - Europe
     Phone: +33-1-30-60-70-68, Email:   veronique.sablereau@atmel.com
Web site: http://www.atmel.com

Contact:

Dr. Susanne van Clewe, Marcom Manager Communications and Automotive
Products, +49-7131-67-2081, or susanne.van-clewe@hno.atmel.com, or
Clive Over, Director of Press Relations - USA and Asia,
+1-408-451-2855, or cliveover@atmel.com, or Veronique Sablereau,
Corporate Communications Manager - Europe, +33-1-30-60-70-68, or
veronique.sablereau@atmel.com, all of Atmel Corporation

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