Melexis Introduces New 380-to-450-MHz Transmitter Chip with Clock Output in Ultra-Small QFN Package
November 23, 2005 - Ieper, Belgium
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Melexis extends its line of low-power and low-cost RF ICs with a new transmitter. The TH72016 works in virtually any FSK, ASK or FM system in the 380-450MHz unlicensed Industrial-Scientific-Medical (ISM) and Short-Range-Devices (SRD) frequency bands. Its extended operating temperature range of -40°C to +125°C and clock output to drive a microcontroller make it fit ideally for automotive applications such as Tire Pressure Monitoring Sytems (TPMS) or Remote Keyless Entry (RKE) that require enhanced data timing.
The TH72016 comes in a space-saving 10-pin Quad Flat No-lead (QFN) package with a footprint of only 3mm x 3mm. Compared to other solutions on the market, Melexis’ ICs do not require external components to set up the PLL loop filter or the VCO.
It enables designers to perfectly match their system requirements to a large scale of coding schemes and propagation ranges.
The TH72016 IC accepts battery voltages from 1.9 to 5.5 V. Power consumption ranges from 3.5 mA to 12.8 mA depending on the frequency and power setting. In standby mode the current consumption is below 50 nA. The programmable RF transmit power range between -12 to 10dBm allows the designer to adapt to his RF power requirements.
The TH72016 transmitter IC combines flexibility with high levels of circuit complexity. Compared to a SAW-based solution the PLL-based transmitter offers substantially more frequency stability. At the same time it can be easily re-configured for another output frequency just by changing the crystal frequency. SAW transmitters, on the contrary, are limited because they are only available for certain operating frequencies.
Dr. Andreas Laute, Manager of Melexis’ Business Unit Wireless Communication, explains: “the primary goal in the development of all new transmitter, receiver, and transceiver products is to simplify design for the RF system engineers. We not only want to provide them with superior performance and design flexibility, but we want to do so across all popular non-licensed RF spectrums and other low-power broadcast formats.“
Typical applications for the TH72016 include security systems, home automation, garage door openers, wireless door bells, baby monitors. The extended operating temperature range of -40 to +125 °C makes the part ideally fit for automotive applications such as remote keyless entry (RKE), tire pressure monitoring systems (TPMS), car alarm systems, etc. Melexis also offers corresponding receiver chips to complete the system.
The new TH72016 transmitter IC completes the existing TH720xx family of transmitters. In quantities of 100k, cost per unit for the TH72016 is €0.56.
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EVB72016
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Evaluation Board for TH72016
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TH72016
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Transmitter - 433MHz, FSK/ASK, with Clock Output (10L QFN 3x3 Dual)
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For Further Information
Please Contact:
Tanguy Scorpati
Marketing Communications Europe
+32 13 67 07 95
tas@melexis.com
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