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Analog Devices / Maxim Integrated MAX2121 直接转换调谐器集成电路

美信集成 MAX2121 是低成本、直接转换调谐器集成电路，专为卫星机顶盒和 VSAT 应用而设计。该装置使用宽带 I/Q 下变频器直接将卫星信号从 LNB 转换至基带。工作频率范围更大，从 925MHz 至 2175MHz。 

​The device includes an LNA and an RF variable-gain amplifier, I and Q downconverting mixers, and base-band lowpass filters and digitally controlled baseband variable-gain amplifiers. Together, the RF and base-band variable-gain amplifiers provide more than 80dB of gain control range.

The Analog Devices MAX2121 includes fully monolithic VCOs and a complete fractional-N frequency synthesizer. An on-chip crystal oscillator and a buffered output for driving additional tuners and demodulators are also provided. Synthesizer programming and device configuration are accomplished with a 2-wire serial interface.

特性

  • 925MHz to 2175MHz frequency range
  • Monolithic VCO
    • -97dBc/Hz at 10kHz low phase noise 
    • No calibration required
  • -75dBm to 0dBm high dynamic range 
  • 123.75MHz integrated LP filters 
  • Single +3.3V ±5% supply
  • Low-power standby mode
  • Address pin for multi-tuner applications
  • Differential I/Q interface
  • I2C 2-wire serial interface
  • Very small, 5mm x 5mm, 28-pin TQFN package

应用

  • VSATs

Functional Diagram

框图 - Analog Devices / Maxim Integrated MAX2121 直接转换调谐器集成电路
发布日期: 2015-08-25 | 更新日期: 2023-04-13