STV6110A

8PSK / QPSK低功耗3.3 V卫星调谐器IC 8PSK/QPSK low-power 3.3 V satellite tuner IC

Description

The satellite tuner is a direct conversion zero IF receiver dedicated to digital TV broadcasting. On the RF input is a low noise amplifier LNA, with buffer to supply the RF output for loop-through, and a continuously variable gain LNA to ensure an optimal signal level for the two mixers. Each mixer, which down-converts the signal to baseband, is followed by a low-pass filter and amplifier. The baseband gain can be varied by programming a register via the I2C bus.

Features

■ RF to baseband 8PSK/QPSK direct conversion

■ Single 3.3 V DC supply

■ Input frequency range 950 MHz to 2150 MHz

■ Supports 1 to 45 Msymbol/s

■ On-chip RF loop-through

■ Fully integrated PLL frequency synthesizer for DVB-S2 including loop filter

■ Extremely low phase noise compliant with DVB-S2 requirements

■ Low external component count

■ Low power consumption

■ Flexible crystal frequency output to drive the demodulator IC

■ Continuously variable gain: 0 to 65 dB

■ Additional and programmable gain on baseband amplifier: 0 to 16 dB

■ Programmable 5- to 36-MHz cut-off frequencybutterworth 5th-order baseband filters

■ Compatible with 5-V and 3.3 V I2C bus