TH72015

· Fully integrated PLL-stabilized VCO
· Frequency range from 380 MHz to 450 MHz
· Single-ended RF output
· FSK through crystal pulling allows modulation from DC to 40 kbit/s
· High FSK deviation possible for wideband data transmission
· ASK achieved by on/off keying of internal power amplifier up to 40 kbit/s
· Wide power supply range from 1.95 V to 5.5 V
· 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 +10 dBm
· Adjustable current consumption from 3.4 mA to 10.6 mA
· Conforms to EN 300 220 and similar standards
· 10-pin Quad Flat No-Lead Package (QFN)

The TH72015 FSK/ASK transmitter IC is designed for applications in the European 433 MHz industrialscientific- medical (ISM) band, according to the EN 300 220 telecommunications standard; but it can also be used in other countries with similar standards, e.g. FCC part 15.231.

The transmitter TH72015's carrier frequency f_c is determined by the frequency of the reference crystal f_ref. The integrated PLL synthesizer ensures that carrier frequencies, ranging from 380 MHz to 450 MHz, can be achieved. This is done by using a crystal with a reference frequency according to: f_ref = f_c/N, where N = 32 is the PLL feedback divider ratio.