TH72032 868/915MHz ASK Transmitter Features Application Examples Fully integrated PLL-stabilized VCO General digital data transmission Frequency range from 850 MHz to 930 MHz Tire Pressure Monitoring System (TPMS) Single-ended RF output Remote Keyless Entry (RKE) ASK achieved by on/off keying of internal Low-power telemetry power amplifier up to 40 kbit/s Alarm and security systems Wide power supply range from 1.95 V to 5.5 Garage door openers V Home automation Very low standby current On-chip low voltage detector Pin Description High over-all frequency accuracy 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 TH72032 K DC BAA-000 RE TH72032 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: TH72032KDC-BAA-000-TU General Description The TH72032 ASK 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 915 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 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 012 - JUNE 14, 2017 3901072032 TH72032 868/915MHz ASK 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. ASK 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. 17 .............................................................................................. 18 7. Package Information ............................................................................................................................ 19 Page 2 of 21 REVISION 012 - JUNE 14, 2017 3901072032