TDA7100

Overview

TDA7100 - Transmitter with high efficiency power amplifier

The TDA7100 is a single chip ASK/FSK transmitter operating in the 433 to 435MHz frequency band. The IC offers a high level of integration and needs only a few external components to build a complete transmitter. The device contains a fully integrated PLL synthesizer and a high efficiency power amplifier to drive the antenna. A special circuit design and a unique power amplifier contribute to low current consumption and to extended battery life.
Additional features are a power down mode and a clock output ( F ref ÷16 ) which could be used as CL for a μC.

 

Summary of Features

  • Fully integrated PLL frequency synthesizer
  • Fully integrated VCO (no need for external components)
  • ASK and FSK modulation
  • Frequency range 433 to 435MHMHz
  • High efficiency power amplifier (typically +5dBm output power by 3V supply  voltage)
  • Low supply current
  • Voltage supply range 2.1 - 4V
  • Temperature range -20 to +70°C
  • Power down mode
  • Crystal oscillator in 13.5MHz band (F o = 32 x F ref )
  • Built-in low/high frequency switch for FSK Mode
  • Divided clock output for μC clocking (F ref ÷16)
  • Low external component count

Potential Applications

  • Remote control systems
  • Alarm systems
  • Communication systems
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