MAX2121中文资料完备的直接变频L波段调谐器数据手册ADI规格书

描述 Description

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.

特性 Features

• 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 Application

• VSAT

简介

MAX2121属于RF/IF射频/中频RFID的RFIC模块。由ADI制造生产的MAX2121RF 其它 IC 和模块RF 其它 IC 和模块产品系列包含各种独特、专门或特定用途的产品，可与 RF、IF 和微波无线电应用结合使用。示例包括 AM/FM 调谐器和接收器、偏置网络、基带处理器、计数器、数字可调电容器、下变频器、倍频器、移相器、前置分频器、端接器、上变频器、VCO 等。