LA7790M Datasheet (Sanyo) - QPSK Transmitter

LA7790M, QPSK Transmitter

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 mod

LA7790M 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. Frequency range selection function permits broadband designs.

* Electronic volume control for direct-current control of RF out