Ordering number : EN5689A Monolithic Linear IC LA7790M QPSK Transmitter for Cable TV Overview The LA7790M is a QPSK data transmitter for digital cable TV applications.
By integrating the I/Q quadrature modulator, RF amplifier, electronic volume control, mute control, and other functions onto a single chip, parts count is reduced and set size is miniaturized.
• • • • • • Varactor diode-based VCO Muting Electronic volume control Power-saving modes Switchable output frequency range Power supply voltage of 5 V (4.
5 to 5.
5 V) Features • Maximum RF amplifier output level of +10 dBm (75Ω terminator), suitable for directly driving the cable.
• RF output frequency range of 5 to 70 MHz.
Frequenc...

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