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Description

The MAX2112 low-cost, direct-conversion tuner IC is designed for satellite set-top and VSAT applications. The IC is intended for 8PSK and Digital Video Broadcast (DVB-S2) applications. The MAX2112 directly converts the satellite signals from the LNB to baseband using a broadband I/Q downconverter. The operating frequency range extends from 925MHz to 2175MHz. The device includes an LNA and an RF variable-gain amplifier, I and Q downconverting mixers, and baseband lowpass filters with  rogrammable cutoff frequency control and digitally controlled baseband variable-gain amplifiers. Together, the RF and baseband variable-gain amplifiers  provide more than 80dB of gain control range. The IC is compatible with virtually all DVB-S2 demodulators.

Features
1. 925MHz to 2175MHz Frequency Range
2. Monolithic VCO
3. Low Phase Noise: -97dBc/Hz at 10kHz
4. No Calibration Required
5. High Dynamic Range: -75dBm to 0dBm
6. Integrated Variable BW LP Filters: 4MHz to 40MHz
7. Single +3.3V ±5% Supply
8. Low-Power Standby Mode
9. Address Pin for Multituner Applications
10. Differential I/Q Interface
11. I2C 2-Wire Serial Interface