MAX2700

1.8GHz至2.5GHz、直接下变换接收器

首款直接变频接收器,用于宽带无线本地网


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说明

The MAX2700/MAX2701 are highly integrated direct downconversion (zero-IF) receivers designed for wideband wireless local loop (WLL) systems operating in the 1.8GHz to 2.5GHz band. The MAX2700/MAX2701s' zero-IF architecture eliminates the need for IF downconversion stages and the use of an IF SAW filter. This reduces the overall receiver cost by reducing the component count and required board space.

The MAX2700/MAX2701 have three main blocks: low-noise amplifier (LNA), quadrature downconverter, and baseband variable gain amplifiers (VGAs). The LNA is a single-ended amplifier with selectable gain and shutdown options. It provides a high input third-order intercept point (IP3), which reduces cross-modulation and gain compression due to high-level RF interference. The quadrature downconverter section consists of two highly linear double-balanced mixers driven by an external local oscillator (LO) with a selectable LO doubler. The double-balanced mixers are optimized to provide high input IP3 and minimum added noise. The mixers’ high input second-order intercept point (IIP2) helps minimize receiver desensitization due to high-level AM-modulated interferers.

The two baseband VGAs in each channel provide 80dB of total maximum gain and greater than 60dB of gain control. The first AGC amplifier is optimized for low noise, low power dissipation, and high linearity over the entire gain range to ensure high gain compression performance. An external lowpass filter between baseband VGAs provides the required channel selectivity at the adjacent channel. An integrated gain offset correction loop circuit provides <0.3dB amplitude mismatch between the I and Q channels.

The MAX2700/MAX2701 operate from a single +2.7V to +3.3V power supply, drawing only 165mA of supply current and 20µA in shutdown mode. Both devices are available in small 48-pin TQFP packages with exposed paddle (EP) for optimum high-frequency performance.

关键特性

  • Input Frequency Range
    • 1.8GHz to 2.1GHz (MAX2700)
    • 2.1GHz to 2.5GHz (MAX2701)
  • Cascaded Performance at 1960 MHz
    • 3.5dB Noise Figure
    • -7.5dBm Input IP3 at Maximum Gain
  • LNA with Selectable Gain and Shutdown Option
  • High Linearity Direct I/Q Downconverter
  • Wideband LO Quadrature Generator
  • 3dB Baseband Channel Bandwidth of At Least 56MHz
  • Variable Gain Baseband Amplifiers with > 60dB Control Range
  • Baseband Gain Offset Correction Loop
  • +2.7V to +3.3V Single-Supply Operation
  • Small 48-pin TQFP-EP Package

应用

  • 数字微波无线装置
  • 双向MMDS
  • 宽带2.4GHz ISM无线装置
  • 宽带直序扩频系统
  • 无线本地环路(WLL)

技术资料

设计指南 5100 RF和混合信号PCB的一般布局指南
设计指南 2875 噪声系数测量的三种方法

质量和环境数据

申请可靠性报告: MAX2700 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

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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相关资料


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16-Bit, 5.9Gsps Interpolating and Modulating RF DAC with JESD204B Interface

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  • Highly Flexible and Configurable


类型 编号 PDF 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 2875 噪声系数测量的三种方法