TH72031KDC Melexis Inc, TH72031KDC Datasheet
TH72031KDC
Specifications of TH72031KDC
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TH72031KDC Summary of contents
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Features Fully integrated PLL-stabilized VCO Frequency range from 850 MHz to 930 MHz Single-ended RF output FSK through crystal pulling allows modulation from kbit/s High FSK deviation possible for wideband data transmission Wide power supply range from ...
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Document Content 1 Theory of Operation ...................................................................................................3 1.1 General ............................................................................................................................. 3 1.2 Block Diagram .................................................................................................................. 3 2 Functional Description ..............................................................................................4 2.1 Crystal Oscillator .............................................................................................................. 4 2.2 FSK Modulation ................................................................................................................ 4 2.3 Crystal Pulling................................................................................................................... 4 2.4 Output Power Selection .................................................................................................... 5 ...
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Theory of Operation 1.1 General As depicted in Fig.1, the TH72031 transmitter consists of a fully integrated voltage-controlled oscillator (VCO), a divide-by-32 divider (div32), a phase-frequency detector (PFD) and a charge pump (CP). An inter- nal loop filter determines ...
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Functional Description 2.1 Crystal Oscillator A Colpitts crystal oscillator with integrated functional capacitors is used as the reference oscillator for the PLL synthesizer. The equivalent input capacitance CRO offered by the crystal oscillator input pin ROI is about 18pF. ...
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Output Power Selection The transmitter is provided with an output power selection feature. There are four predefined output power steps and one off-step accessible via the power selection pin PSEL. A digital power step adjustment was chosen because of ...
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Mode Control Logic The mode control logic allows two different modes of operation as listed in the following table. The mode control pin ENTX is pulled- down internally. This guarantees that the whole circuit is shut down if this ...
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Pin Definition and Description Pin No. Name I/O Type 1 FSKDTA input 2 FSKSW analog I/O 3 ROI analog I/O 4 ENTX input 5 PSEL analog I/O 6 VCC supply 7 OUT output 8 VEE ground 3901072031 Rev. 010 ...
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Electrical Characteristics 4.1 Absolute Maximum Ratings Parameter Supply voltage Input voltage Storage temperature Junction temperature Thermal Resistance Power dissipation Electrostatic discharge 4.2 Normal Operating Conditions Parameter Supply voltage Operating temperature Input low voltage CMOS Input high voltage CMOS XOSC ...
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DC Characteristics all parameters under normal operating conditions, unless otherwise stated; typical values °C and V A Parameter Operating Currents Standby current Supply current in power step 0 Supply current in power step 1 Supply ...
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AC Characteristics all parameters under normal operating conditions, unless otherwise stated; typical values °C and V A Parameter CW Spectrum Characteristics Output power in step 0 (Isolation in off-state) Output power in step 1 Output ...
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Typical Operating Characteristics 5.1 DC Characteristics I SBY 5µA 4µA 3µA 2µA 1µA 200nA 150nA 100nA 50nA 0 2.0 2.5 4.9 4.5 4.1 3.7 3.3 2.9 2.2 2.6 1.8 3901072031 Rev. 010 Standby current 3.0 3.5 4.0 Vcc [V] ...
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Rev. 010 power step 1 3.4 3.0 3.8 4.2 Vcc [V] Fig. 8: Supply current in power step ...
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Rev. 010 power step 3 3.4 3.0 3.8 4.2 Vcc [V] Fig. 10: Supply current in power step 3 power ...
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AC Characteristics • Data according to test circuit in Fig. 18 (868.3MHz) -10.5 -11.0 -11.5 -12.0 -12.5 -13.0 2.2 2.6 1.8 -2.0 -3.0 -4.0 -5.0 2.2 2.6 1.8 3901072031 Rev. 010 power step 1 3.4 3.8 4.2 3.0 Vcc ...
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Rev. 010 power step 3 3.0 3.4 3.8 4.2 Vcc Vcc [V] [V] Fig. 14: Output power in step 3 power step ...
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Fig.16: 3901072031 Rev. 010 RF output signal with PLL reference spurs Fig.17: Single sideband phase noise Page TH72031 868/915MHz FSK Transmitter Data Sheet Jan/09 ...
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Test Circuit Fig.18: 6.1 Test circuit component list to Fig. 18 Part Size Value @ 868.3 MHz CM1 0805 1.8 pF CM2 0805 5.6 pF CM3 0805 0805 0805 15 nH CX1 0805 ...
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Package Description The device TH72031 is RoHS compliant .10 (.004) all Dimension in mm, coplanarity < 0.1mm min 4.80 3.81 5.80 max 4.98 3.99 6.20 all Dimension in inch, coplanarity < 0.004” ...
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Reliability Information This Melexis device is classified and qualified regarding soldering technology, solderability and moisture sensitivity level, as defined in this specification, according to following test methods: Reflow Soldering SMD’s (Surface Mount Devices) • IPC/JEDEC J-STD-020 “Moisture/Reflow Sensitivity Classification ...
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Disclaimer 1) The information included in this documentation is subject to Melexis intellectual and other property rights. Reproduction of information is permissible only if the information will not be altered and is accompanied by all associated conditions, limitations and ...