TH72005KLD-BAA-000-TU Melexis

TH72005 315MHz FSK/ASK Transmitter Features and Benefits Application Examples Tire Pressure Monitoring System (TPMS) Fully integrated PLL-stabilized VCO Remote Keyless Entry (RKE) Frequency range from 290 MHz to 350 MHz Automatic Meter Reading (AMR) Single-ended RF output Alarm and security systems FSK through crystal pulling allows Garage door openers modulation from DC to 40 kbit/s Home and building automation High FSK deviation possible for wideband Low-power telemetry data transmission Wireless access control ASK achieved by on/off keying of internal power amplifier up to 40 kbit/s Pin Description Wide power supply range from 1.95 V to 5.5 V top view Very low standby current ASKDTA VCC On-chip low voltage detector FSKDTA VEE High over-all frequency accuracy FSKSW OUT FSK deviation and center frequency ROI VEE ENTX PSEL 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 10-pin quad flat no lead (QFN) package) Ordering information Product Code Temperature Code Package Code Option Code Packing Form Code TH72005 K LD BAA-000 RE TH72005 K LD BAA-000 TU Legend: Temperature Code: K for Temperature Range -40C to 125C Package Code: LD for QFN double Packing Form: RE for Reel, TU for Tube Ordering example: TH72005KLD-BAA-000-RE General Description The TH72005 FSK/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 f is determined by the frequency of the reference crystal f . The integrated PLL c ref synthesizer ensures that each RF value, ranging from 290 MHz to 350 MHz, can be achieved by using a crystal with a reference frequency according to: f = f /N, where N = 32 is the PLL feedback divider ratio. ref c REVISION 012 - JUNE 14, 2017 Page 1 of 21 3901072005 TH72005 315MHz FSK/ASK 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 ........................................................................................................................... 4 2.1. Crystal Oscillator ................................................................................................................................. 4 2.2. FSK Modulation .................................................................................................................................. 5 2.3. Crystal Pulling ..................................................................................................................................... 5 2.4. ASK Modulation .................................................................................................................................. 6 2.5. Output Power Selection ..................................................................................................................... 6 2.6. Lock Detection .................................................................................................................................... 6 2.7. Low Voltage Detection ....................................................................................................................... 6 2.8. Mode Control Logic ............................................................................................................................ 7 2.9. 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 REVISION 012 - JUNE 14, 2017 Page 2 of 21 3901072005