The TDA 711x(F) products are single chip ASK/FSK transmitter operating in the 434 and 868MHz frequency band. The ICs offer a high level of integration and need only a few external components to build a complete transmitter solution. The products vary in package and supported frequency band.
The devices contain a fully integrated PLL synthesizer and a high efficiency power amplifier to drive the antenna. A special circuit design, a unique power amplifier and a power down feature contribute to low current consumption and to extended battery life. The ICs have a clock output for the micro-controller and as such enable the usage of only one crystal in the application. Additionally, TDA 7110 features a selectable clock divider ratio.
Summary of Features:
ASK and FSK modulation
Frequency range @ 25°C (depending on device):427 to 442MHz, 854 to 884MHz
High efficiency power amplifier (typ. +10dBm output power at 3V supply voltage)
Low supply current (depending on device): I s = ~14.0mA typ. in transmit mode (V s = 3V)
Very low supply current in power down mode (0.25nA typ.)
Supply voltage range 2.1 to 4V
Temperature range -40 to +85°C
Built-in low/high frequency switch for FSK Mode
Clock output for μC
TDA 7110 only:selectable clock divider ratio
Crystal oscillator in 13.5MHz band and 6MHz band (TDA 7110 only)
Fully integrated PLL frequency synthesizer
Fully integrated VCO (no need for external components)
