STV6110A 8PSK/QPSK low-power 3.3 V satellite tuner IC Data Brief Features Description ■ RF to baseband 8PSK/QPSK direct conversion ■ Single 3.3 V DC supply ■ Input frequency range 950 MHz to 2150 MHz The STV6110A satellite tuner is a directconversion (zero IF) receiver dedicated to digital TV broadcasting. ■ 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 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_OUT IP RF_IN IN QP AGC QN PLL, dividers XTAL_IN XTAL_INN DC offset compensation SCL 2 I C bus interface Amplifier SDA XTAL_OUT August 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com 5 Application 1 STV6110A Application Figure 1. Application diagram for DVB-S2 front-end system STV0903 STV6110A SatTuner I2C SDA, SCL AGC IN,IP QN,QP Choke QM,QP 16 MHz AUX_CLK 27 MHz DISEQC-RX 15 Ω 2/5 XTAL_IN LNBH23 STx7100 or STx7109 MPEG-4 / H.264 Decoder IC IM,IP RF_IN XTAL_OUT SDAT, SCLT AGCRF I2C DISEQC_IN DISEQC_OUT STV6110A 2 Ordering information Ordering information Table 1. Ordering information Order code STV6110A Packaging QFN32 5 x 5 mm 3/5 Revision history 3 STV6110A Revision history Table 2. 4/5 Document revision history Date Revision 21-Aug-2008 1 Changes Initial release. STV6110A Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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