Features: ·Fully integrated, PLL-stabilized VCO·Flexible frequency range from 800 MHz to 930 MHz·ASK achieved by on/off keying of internal power amplifier·FM possible with external varactor·Wide power supply range from 2.2 V to 5.5 V· High over-all frequency accuracy·Very low standby current·Adjus...
TH71081: Features: ·Fully integrated, PLL-stabilized VCO·Flexible frequency range from 800 MHz to 930 MHz·ASK achieved by on/off keying of internal power amplifier·FM possible with external varactor·Wide pow...
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Parameter |
Symbol |
Condition |
Min |
Max |
Unit |
Supply voltage |
Vcc |
-0.3 |
7.0 |
V | |
Input voltage |
Vin |
ENTX pin |
-0.3 |
VCC+0.3 |
V |
Input current |
Iin |
ENTX pin |
-1.0 |
1.0 |
mA |
Storage temperature |
TSTG |
-40 |
150 |
||
Electrostatic discharge |
VESD |
human body model, MIL STD 833D method 3015.7 |
-1.0 |
+1.0 |
kV |
The TH71081 ASK transmitter IC is designed for applications in the European 868MHz industrialscientific- medical (ISM) band, according to the EN 300 220 telecommunications standard. TH71081 can also be used for any other system with carrier frequencies ranging from 800 MHz to 930 MHz (e.g. for applications in the US 915MHz ISM band).
The transmitter TH71081's carrier frequency fc is determined by the frequency of the reference crystal fref that is used. The integrated PLL synthesizer ensures that each RF value, ranging from 800 MHz to 930 MHz, can be achieved by using a crystal with reference frequency according to: fref = fc/N, where N = 32 is the PLL feedback divider ratio.