FM
transmission. This chip includes a 5.8GHz band RF modulator, two channels of audio modulator
and internal power amplifier with +13dBm power output referred to external matching network.
The 5.8GHz band RF modulator block, which is frequency-synthesizer based with an integrated
VCO, generates the 5.8GHz band FM signal modulated with video signal and two modulated
audio subcarriers at 6MHz and 6.5MHz respectively. Both Stereo and Mono application are
available on the chip.
Transmission frequency can be set by internal register via SPI programming, or by selecting six
dedicated pins. Two stages output power of +2dBm or +13dBm can be configured via pins 34
and 35. Both CE and FCC regulations are easy to pass by using RTC6705 with application
circuit and single room shielding case.

Features
� 3.3V power supply
� Built-in PA with +13dBm output power
� 5.8GHz band FM modulator and transmitter
� Simple digital pins setting 24 fixed channels to eliminate external micro-controller
� Two audio subcarrier modulators at 6MHz/6.5MHz
� Single chip CMOS technology with integrated VCO and PLL
� Transmitter frequency programmability by SPI
� 40-pin leadless QFN package pass RoHS

Application
� AV Sender
� Baby Monitor
� Wireless Camera
� Wireless Audio
� Wireless Earphone