MAXIM MAX2117 handbook
The MAX2117 is a low-cost, direct-conversion tuner designed for receiving MMDS transmissions in the 470MHz to 1000MHz band. The MAX2117 is designed for use in consumer set-top boxes and is compatible with most DVB-S demodulators. The MAX2117 directly converts the QPSK broadcast signals from the antenna to baseband using a broadband I/Q downconverter. The tuner provides differential I and Q outputs to the demodulator IC. The device includes an LNA and an RF variable-gain amplifier, I and Q downconverting mixers, and baseband lowpass filters with programmable 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 QPSK demodulators. The MAX2117 includes fully monolithic VCOs, as well as a complete frequency synthesizer. Additionally, an on-chip crystal oscillator is provided along with a buffered output for driving additional tuners and demodulators. Synthesizer programming and device configuration are accomplished with a 2-wire serial interface. The IC features a VCO autoselect (VAS) function that automatically selects the proper VCO. For multituner applications, the device can be configured to have one of two 2-wire interface addresses. A low-power standby mode is available whereupon the signal path is shut down while leaving the reference oscillator, digital interface, and buffer
Brand: MAXIM
File format: PDF
Size: 266 KB
MD5 Checksum: 2F26548F7807DA457CA3E5968CED0090
Publication date: 07 May, 2012
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PDF Link: MAXIM MAX2117 handbook PDF