Automotive ICs TH72002 315MHz ASK Transmitter Hall ICs Intelligent Drivers and Actuators The TH72002 ASK transmitter IC is designed for applications in the 315 MHz industrial-scientific-medical (ISM) band. It can also be used for any other system with carrier frequencies ranging from 290 MHz to 350 MHz. 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 290 MHz to 350 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. RF&RFID Features • • • • • • • Very low standby current On-chip low voltage detector High over-all frequency accuracy Adjustable output power range from -12 dBm to +11 dBm Adjustable current consumption from 3.2 mA to 10.3 mA Conforms to FCC part 15 and similar standards 8-pin Small Outline Integrated Circuit (SOIC8) CMOS Imaging Fully integrated PLL-stabilized VCO Frequency range from 290 MHz to 350 MHz Single-ended RF output ASK achieved by on/off keying of internal power amplifier up to 40 kbit/s 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 Block Diagram with external Components Automotive ICs RPS VCC ENTX Hall ICs ROI mode control 32 3 XBUF Intelligent Drivers and Actuators PA 7 OUT antenna matching network CP VCO low voltage detector 2 CX1 RF&RFID 1 PFD XOSC n.c. 5 PLL 4 XTAL ASKDTA PSEL 6 8 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 n.c. 7 FSKDTA 8 VEE CB1 1 2 3 4 RPS XTAL ASK data 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.