The TDK5100 is a single chip ASK/FSK Transmitter for 868 to 870MHz frequency band. The IC offers a high level of integration and needs only a few external components. The device contains a fully integrated PLL synthesizer and a high efficiency power amplifier to drive a loop antenna. A special circuit design and unique power amplifier design are used to save current consumption and therefore to save battery life. Additionally features like a power down mode, a low power detect, a selectable crystal oscillator frequency and a divided clock output are implemented. The IC can be used for both ASK and FSK modulation.
Fully integrated frequency synthesizer
VCO without external components
ASK and FSK modulation
High efficiency power amplifier (typically 5/2dBm)