TH72011KDC-BAA-000-TU Melexis

TH72011 433MHz FSK Transmitter Features Application Examples General digital data transmission Fully integrated PLL-stabilized VCO Tire Pressure Monitoring System (TPMS) Frequency range from 380 MHz to 450 MHz Remote Keyless Entry (RKE) Single-ended RF output Low-power telemetry FSK through crystal pulling allows Alarm and security systems modulation from DC to 40 kbit/s Garage door openers High FSK deviation possible for wideband Home automation data transmission Wide power supply range from 1.95 V to 5.5 Pin Description V 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 +10 dBm Adjustable current consumption from 3.4 mA to 10.6 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 TH72011 K DC BAA-000 RE TH72011 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: TH72011KDC-BAA-000-RE General Description The TH72011 FSK transmitter IC is designed for applications in the European 433 MHz industrial-scientific-medical (ISM) band, according to the EN 300 220 telecommunications standard but it can also be used in any other country with similar frequency bands. 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 380 MHz to 450 MHz, can be achieved by using a crystal with a reference frequency according to: fref = fc/N, where N = 32 is the PLL feedback divider ratio. Page 1 of 21 REVISION 012 - JUNE 14, 2017 3901072011 TH72011 433MHz 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 ........................................................................................................................... 4 2.1. Crystal Oscillator ................................................................................................................................. 4 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 Page 2 of 21 REVISION 012 - JUNE 14, 2017 3901072011