Single Chip Synthesized Zero IF Tuner
Description
SL1935
Single Chip Synthesized Zero IF Tuner
April 2004
Features
• • • • • • • • • Single chip synthesised tuner solution for quadrature down conversion, L-band to Zero IF.
DVB compliant, operating dynamic range -70 to -20dBm.
Compatible with DSS and DVB variable symbol rate applications.
Selectable baseband path, programmable through I2C bus.
Excellent quadrature balance up to 30MHz baseband Excellent immunity to spurious second harmonic (RF and LO) mixing effects.
Low oscillator phase noise and reradiation.
High output referred linearity for low distortion and multi channel application.
Integral fast mode compliant I2C bus controlled PLL frequency synthesiser, designed for high comparison frequencies and low phase noise performance.
Buffered crystal output for clocking QPSK demodulator.
ESD protection (Normal ESD handling procedures should be observed).
Ordering Information
SL1935D/KG/NP1P (Tubes) 36 pin SSOP SL1935D/KG/NP1Q (Tape and Reel) 36 pin SSOP
Description
The SL1935 is a complete single chip I2C bus controlled Zero IF tuner and operates from 950 to 2150MHz.
It includes an on-board low phase noise PLL frequency synthesiser and low noise LNA/AGC.
The SL1935 is intended primarily for application in digital satellite Network Interface Modules and performs the complete tuner function.
The device contains all elements necessary, with the exception of local oscillator tuning network and crystal reference, to produce a high performance I(n-phase) & Q(uadrature) downconversion tuner function.
Due to the high signal handling design the device does not require any front end tracking filters.
The SL1935 includes selectable baseband signal paths, allowing application with two externally definable filter bandwidths, facilitating application in variable symbol rate and simulcast systems.
The SL1935 is optimised to interface with the VP310 (ADC/QPSK/FEC) Satellite Channel Decoder, available from Zarlink Semiconductor and offers a full front end solution.
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Applic...
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