TH72001KDC-BAA-000-TU Melexis

TH72001 315MHz FSK Transmitter Features and Benefits Application Examples General digital data transmission Fully integrated PLL-stabilized LC VCO Tire Pressure Monitoring System (TPMS) Frequency range of 290MHz to 350MHz 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 2.1 V to 5.5 V Pin Description 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 +11 dBm Adjustable current consumption from 3.2 mA to 10.3 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 TH72001 K DC BAA-000 RE TH72001 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: TH72001KDC-BAA-000 General Description The TH72001 FSK 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 at 290 to 350MHz. The transmitter s carrier frequency f is determined by the frequency of the reference crystal f . The integrated PLL synthesizer c ref ensures that the radio frequency (RF) can be achieved by using a crystal with a reference frequency according to: f = f /N, where ref c N = 32 is the PLL feedback divider ratio. REVISION 011 - JUNE 13, 2017 Page 1 of 23 3901072001 TH72001 315MHz FSK Transmitter Contents Features and Benefits ................................................................................................................................ 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 ........................................................................................................................................... 19 6.1. Test circuit component list to Fig. 18 .............................................................................................. 19 7. Package Information ............................................................................................................................ 21 REVISION 011 - JUNE 13, 2017 Page 2 of 23 3901072001