LA7790M

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. Frequency range selection function permits broadband designs. Electronic volume control for direct-current control of RF output level. Muting ensures ample attenuation during periods with no transmission. Support for both internal and external bias for I/Q modulation inputs. Support for I/Q modulation frequencies up to 10 MHz. (typ: 500 mVp-p) Package Dimensions unit: mm 3108-MFP24D [LA7790M] Functions I/Q quadrature modulator I/Q input bias power supply RF amplifier SANYO: MFP24D Allowable power dissipation, Pdmax (mW) Ambient temperature, Ta (°C) SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 5061998RM (OT) No. 5689-1/14 LA7790M Specifications Maximum Ratings at Ta = 25°C Parameter Maximu...