MAX2117 Complete, Direct-Conversion Tuner for MMDS Applications
The MAX2117 directly converts the QPSK broadcast signals from the antenna to baseband using a broad-band l/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 con trolled baseba nd 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 in terface addresses. A low-power standby mode is available whereupon the signal path is shut down while leaving the reference oscillator, digital in tertace, and buffer circuits active, providing a method to reduce power in single and multituner applications.
The MAX2117 is the most advanced MMDS tuner available today. The low noise figure eliminates the need for an externml LNA. A small number of passive compo-nents are needed to form a complete MMDS front-end solution. The tuner is available in a very small 28-pin thin QFN package.
●Features
■470MHz to 1000MHz Frequency Range
■Monolithic VCO: No Calibration Required
■High Dynamic Range: -75dBm to 0dBm
■4MHz to 40MHz Integrated Variable BW LP Filters
■Single +3.3V ±5% Supply
■Low-Power Standby Mode
■Address Pin for Multituner Applications
■Differential I/Q Interface
■I²C 2-Wire Serial Interface
■Very Small 28-Pin Thin QFN Package
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Complete, Direct-Conversion Tuner 、 low-cost, direct-conversion tuner 、 advanced MMDS tuner 、 downconverts |
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[ MMDS ] |
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Datasheet |
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Please see the document for details |
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QFN;QFN-EP;TQFN-EP |
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English Chinese Chinese and English Japanese |
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5/10 |
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Rev 2 |
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19-0986 |
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265 KB |
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