MAX2121

完备的直接变频L波段调谐器

业内首款L波段调谐器,内置123MHz IF滤波器


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说明

The MAX2121 low-cost, direct-conversion tuner IC is designed for satellite set-top and VSAT applications. The device directly converts the satellite signals from the LNB to baseband using a broadband I/Q downconverter. The operating frequency range extends from 925MHz to 2175MHz.

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

The device includes fully monolithic VCOs, as well as a complete fractional-N 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 circuits active, providing a method to reduce power in single and multituner applications.

The device is the most advanced broadband/VSAT DBS tuner available. The low noise figure eliminates the need for an external LNA. A small number of passive components are needed to form a complete broadband satellite tuner DVB-S2 RF front-end solution. The tuner is available in a very small, 5mm x 5mm, 28-pin thin QFN package.
MAX2121: Typical Application Circuit MAX2121: Typical Application Circuit 放大+

关键特性

  • 925MHz to 2175MHz Frequency Range
  • Monolithic VCO
    • Low Phase Noise: -97dBc/Hz at 10kHz
    • No Calibration Required
  • High Dynamic Range: -75dBm to 0dBm
  • Integrated LP Filters: 123.75MHz
  • 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, 5mm x 5mm, 28-Pin TQFN Package

应用

  • VSAT
Part NumberRef. Clock Freq.
(MHz)
Input Frequency
(MHz)
IF Output Freq.
(MHz)
Noise Figure
(dB)
VSUPPLY
(V)
ISUPPLY
(mA)
ApplicationsFootprint
(mm x mm)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
typSee Notes
MAX2121 12 to 30925 to 2175123.7583.13 to 3.47148VSAT5.0 x 5.0-40 to +85
TQFN/28
$4.46 @1k
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Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX2121EVKIT: MAX2121评估板

技术资料

应用笔记 6448 Tuner Configuration for Faster Lock Time
设计指南 5100 RF和混合信号PCB的一般布局指南

质量和环境数据

产品可靠性报告: MAX2121.pdf 
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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评估板7564MAX2121EVKIT MAX2121评估板