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STV6110A
8PSK/QPSK low-power 3.3 V satellite tuner IC
Data Brief
Features

Description
The STV6110A satellite tuner is a directconversion (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. The LO signals are provided by an integrated PLL which contains an on-chip voltage controlled oscillator (VCO) meeting stringent phase noise requirements. The PLL loop filter is integrated. The LO frequencies are programmable. The comparison frequency for the phasefrequency detector (PFD) is generated by dividing the crystal oscillator reference frequency. The crystal frequency can be from 16 MHz to 32 MHz depending on application.
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
RF_OUT IP IN QP AGC QN PLL, dividers XTAL_IN XTAL_INN XTAL_OUT DC offset compensation SCL Amplifier I C bus interface SDA
2
RF_IN
August 2008
Rev 1
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Application
STV6110A
1
Application
Figure 1. Application diagram for DVB-S2 front-end system
STV6110A SatTuner SDA, SCL AGC IN,IP RF_IN QN,QP STV0903 I2C SDAT, SCLT AGCRF IM,IP QM,QP I2C STx7100 or STx7109 MPEG-4 / H.264 Decoder IC
XTAL_OUT
16 MHz
XTAL_IN
AUX_CLK
Choke
27 MHz DISEQC-RX DISEQC_IN DISEQC_OUT
15
LNBH23
2/5
STV6110A
Ordering information
2
Ordering information
Table 1. Ordering information
Order code STV6110A QFN32 5 x 5 mm Packaging
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Revision history
STV6110A
3
Revision history
Table 2.
Date 21-Aug-2008
Document revision history
Revision 1 Initial release. Changes
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STV6110A
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