Description

The STV6110A 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 frequency(butterworth 5th-order baseband filters)

■ Compatible with 5-V and 3.3 V I2C bus