The MAX2102/MAX2105* are low-cost direct-conversion tuner ICs designed for use in digital direct-broadcast satellite (DBS) television set-top box units. The direct-conversion architecture reduces system cost compared to devices with IF-based architectures.

The MAX2102/MAX2105 directly tune L-band signals to baseband using a broadband I/Q downconverter. Operating frequency range spans from at least 950MHz to 2150MHz.

The ICs include a low-noise amplifier (LNA) with automatic gain control (AGC), two downconverter mixers, an oscillator buffer with 90° quadrature generator and prescaler, and baseband amplifiers.

The MAX2102 features an AGC range of 50dB, allowing input power levels as low as -69dBm. The MAX2105 has a reduced AGC range of 41dB and accepts input power levels down to -60dBm. The reduced AGC range of the MAX2105 allows the use of a high-gain external LNA to achieve a lower system noise figure (NF).


  • Low-Cost Bipolar Design, Lowest Cost Architecture
  • Operate from a Single +5V Supply
  • 950MHz to 2150MHz Input Frequency Range*
  • On-Chip Quadrature Generator, Dual-Modulus Prescaler (/64, /65)
  • Input Levels
    • 69dBm to -19dBm per Carrier (MAX2102)
    • -60dBm to -19dBm per Carrier (MAX2105)
  • Over 50dB AGC Control Range (MAX2102)
  • Noise Figure = 13.2dB (MAX2102); IP3 = 6.5dBm (at 1450MHz)
  • Automatic Baseband Offset Correction
  • Easy Interface to MAX1002/MAX1003 Dual ADC and Popular Baseband ICs


  • 宽带系统
  • 蜂窝电话基站
  • DBS调谐器
  • DVB兼容的DBS调谐器
  • LMDS
  • 无线本地环路(WLL)


设计指南 5100 RF和混合信号PCB的一般布局指南
设计指南 686 QPSK调制器
申请可靠性报告: MAX2102 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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Ultra-Wideband, Direct-Conversion, L-Band Satellite Tuner

  • 925MHz to 2175MHz Frequency Range
  • Monolithic VCO
  • High Dynamic Range: -75dBm to 0dBm

类型 编号 标题
设计指南 5100 RF和混合信号PCB的一般布局指南
设计指南 686 QPSK调制器