TH72031KDC-BAA-000-TU Melexis

TH72031 868/915MHz FSK Transmitter Features Application Examples Fully integrated PLL-stabilized VCO General digital data transmission Frequency range from 850 MHz to 930 MHz Tire Pressure Monitoring Systems (TPMS) Single-ended RF output Remote Keyless Entry (RKE) FSK through crystal pulling allows Wireless access control modulation from DC to 40 kbit/s Alarm and security systems High FSK deviation possible for wideband Garage door openers data transmission Remote Controls Wide power supply range from 1.95 V to 5.5 Home and building automation V Low-power telemetry systems Very low standby current On-chip low voltage detector Pin Description 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 13.4 mA Conforms to EN 300 220 and similar standards 8-pin Small Outline Integrated Circuit (SOIC) Ordering information Product Code Temperature Code Package Code Option Code Packing Form Code TH72031 K DC BAA-000 RE TH72031 K DC BAA-000 TU Legend: Temperature Code: K for Temperature Range -40C to 125C Package Code: DC for SOIC Packing Form: RE for Reel, TU for Tube Ordering example: TH72031KDC-BAA-000-TU General Description The TH72031 FSK transmitter IC is designed for applications in the European 868 MHz industrial-scientific-medical (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 f is determined by the frequency of the reference crystal f . The integrated PLL c ref 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: f = f /N, where N = 32 is the PLL feedback divider ratio. ref c Page 1 of 21 REVISION 013 - JUNE 14, 2017 3901072031 TH72031 868/915MHz FSK Transmitter Contents Features ..................................................................................................................................................... 1 Application Examples ................................................................................................................................. 1 Pin Description ........................................................................................................................................... 1 Ordering information ................................................................................................................................. 1 General Description ................................................................................................................................... 1 1. Theory of Operation ............................................................................................................................... 4 1.1. General................................................................................................................................................ 4 1.2. Block Diagram ..................................................................................................................................... 4 2. Functional Description ........................................................................................................................... 5 2.1. Crystal Oscillator ................................................................................................................................. 5 2.2. FSK Modulation .................................................................................................................................. 5 2.3. Crystal Pulling ..................................................................................................................................... 5 2.4. Output Power Selection ..................................................................................................................... 6 2.5. Lock Detection .................................................................................................................................... 6 2.6. Low Voltage Detection ....................................................................................................................... 6 2.7. Mode Control Logic ............................................................................................................................ 7 2.8. Timing Diagrams ................................................................................................................................. 7 3. Pin Definition and Description ................................................................................................................ 8 4. Electrical Characteristics ........................................................................................................................ 9 4.1. Absolute Maximum Ratings ............................................................................................................... 9 4.2. Normal Operating Conditions ............................................................................................................ 9 4.3. Crystal Parameters ............................................................................................................................. 9 4.4. DC Characteristics ............................................................................................................................ 10 4.5. AC Characteristics ............................................................................................................................. 11 4.6. Output Power Steps ......................................................................................................................... 11 5. Typical Operating Characteristics ......................................................................................................... 12 5.1. DC Characteristics ............................................................................................................................ 12 5.2. AC Characteristics ............................................................................................................................. 15 6. Test Circuit ........................................................................................................................................... 18 6.1. Test circuit component list to Fig. 18 .............................................................................................. 18 7. Package Description ............................................................................................................................. 19 Page 2 of 21 REVISION 013 - JUNE 14, 2017 3901072031