The ATA5723, ATA5724, and ATA5728 support the typically used Manchester and Bi-phase coding signals. In addition, they provide a logarithmic RSSI output, which enables customers to achieve good resolution at low field strengths. The ICs' excellent receiving selectivity is accomplished by an integrated image rejection mixer with 30 dB rejection, -113 dBm sensitivity, and improved selectivity due to the integrated IF filter, low-phase-noise VCO, PLL, and loop filter.
The new receiver ICs need few external devices and no external filters -- adding to their cost-efficiency. Ten passive components, a crystal, and an RF antenna are all that is typically needed to create a receiver board application. Additionally, due to the ICs' large oscillation margin, designers can choose very low-cost crystals.
The ATA5723, ATA5724, and ATA5728 are based on Atmel's well-known ATA5743, which has set a worldwide standard with its unique polling mode functionality. As a result, the devices' polling features allows the microcontroller to remain in standby mode, enabling very low current consumption for complete applications. The active current consumption is specified at about 8 mA in receiving mode. The single-ended RF input allows easy adaptation of lambda/4 or printed loop antennas and leads to relaxed tolerance requirements for RF matching components.
Availability and Pricing
Samples of the ATA5723/ATA5724/ATA5728 are now available in SSO20 packages. Pricing starts at US $1.40 (for 10k piece quantities). Customers of the three new receivers ICs can use the software currently available for the ATA5743. Evaluation boards, ATA5723-DK, ATA5724-DK and ATA5728-DK, to support the system designer are also available at a cost of US $99.
Footnote ASK = Alternating Shift Keying FSK = Frequency Shift Keying PLL = Phase Locked Loop RKE = Remote Keyless Entry TPMS = Tire Pressure Monitoring UHF = Ultra High Frequency VCO = Voltage Controlled Oscillator
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) technology portfolios, Atmel is able to provide the electronics industry with complete system solutions focused on consumer, industrial, security, communications, computing and automotive markets.
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Product information on Atmel's new UHF ASK/FSK receiver ICs may be retrieved at:
http://www.atmel.com/dyn/products/product_card.asp?part_id=4216 ATA5723 http://www.atmel.com/dyn/products/product_card.asp?part_id=4217 ATA5724 http://www.atmel.com/dyn/products/product_card.asp?part_id=4218 ATA5728 Press Contacts Dr. Susanne van Clewe, Marcom Manager Communications and Automotive Products Phone: +49 7131 67-2081, Email: Email Contact Helen Perlegos, Public Relations Phone: +1 408 487-2963, Email: Email Contact
Web site: http://www.atmel.com/