Automotive ICs TH72031 868/915MHz FSK Transmitter Hall ICs Intelligent Drivers and Actuators RF&RFID The TH72031 FSK transmitter IC is designed for applications in the European 868 MHz industrial-scientificmedical (ISM) band, according to the EN 300 220 telecommunications standard. It can also be used for any other system with carrier frequencies ranging from 850 MHz to 930 MHz (e.g. for applications in the US 902 to 928 MHz ISM band). The transmitter's carrier frequency fc is determined by the frequency of the reference crystal fref. The integrated PLL synthesizer ensures that each RF value, ranging from 850 MHz to 930 MHz, can be achieved. This is done by using a crystal with a reference frequency according to: fref = fc/N, where N = 32 is the PLL feedback divider ratio. Features • • • • • • • • Very low standby current On-chip low voltage detector High over-all frequency accuracy FSK deviation and center frequency independently adjustable Adjustable output power range from -12 dBm to +9.5 dBm Adjustable current consumption from 5.1 mA to 13.4mA Conforms to EN 300 220 and similar standards 8-pin Small Outline Integrated Circuit (SOIC8) CMOS Imaging Fully integrated PLL-stabilized VCO Frequency range from 850 MHz to 930 MHz Single-ended RF output FSK through crystal pulling allows modulation from DC to 40 kbit/s High FSK deviation possible for wideband data transmission Wide power supply range from 1.95 V to 5.5 V Wide operating temperature range from –40° C to 125° C Silicon MEMS • • • • • • • Bus ICs IR Temperature Automotive ICs Block Diagram with external Components RPS VCC PSEL 6 ENTX Hall ICs ROI 4 mode control 32 3 XTAL 5 PLL PA 7 OUT antenna matching network PFD XOSC XBUF CP VCO low voltage detector FSKSW 2 RF&RFID Intelligent Drivers and Actuators CX2 CX1 1 8 FSKDTA VEE Applications • • • • General digital data transmission Tire Pressure Monitoring Systems (TPMS) Remote Keyless Entry (RKE) Low-power telemetry systems • • • • Home and building automation Alarm and security systems Garage door openers Remote controls Silicon MEMS Application Circuit PCB loop antenna CM1 CMOS Imaging LM2 LM1 CM2 VCC Bus ICs VCC PSEL ROI ENTX 5 OUT 6 FSKSW 7 FSKDTA 8 VEE CB1 1 2 3 4 RPS XTAL FSK data CX2 CX1 Email Europe and rest of the world: [email protected] Email USA : [email protected] For additional information go to our website at: Email Asia: [email protected] Feb 2007 IR Temperature Disclaimer: Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical lifesupport or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering of technical or other services. © 2006 Melexis NV. All rights reserved.