MAX2106中文资料DBS直接下变频器数据手册ADI规格书

描述 Description

The MAX2106 low-cost, direct-conversion tuner IC is designed for use in digital direct-broadcast satellite (DBS) television set-top box units and is a pin-for-pin upgrade for the MAX2104. Its direct-conversion architecture reduces system cost compared to devices with IF-based architectures. The MAX2106 directly tunes L-band signals to baseband using a broadband I/Q downconverter. The operating frequency range spans 925MHz to 2175MHz.
The IC includes a low-noise amplifier (LNA) with gain control, I and Q downconverting mixers, lowpass filters with gain and frequency control, a local oscillator (LO) buffer with a 90° quadrature network, and a charge-pump-based phase-locked loop (PLL) for frequency control. The MAX2106 has an on-chip LO, requiring only an external varactor-tuned LC tank for operation. The LO's output drives the internal quadrature generator and has a buffer amplifier to drive off-chip circuitry. The MAX2106 comes in a 48-pin thin quad flat-pack package with exposed paddle (EP).
Advantages Over MAX2104 Improved Front End Achieves 10.2dB NF at 1550MHz Higher Input IIP3: 11.5dBm at 1550MHz Reduced Spurious Downconversion Products Capable of Using an External Synthesizer

特性 Features

• Requires Only Minor Software Upgrade and
• Complete Low-Cost Solution for DBS Direct Downconversion
• 1MBaud to 45MBaud Operation
• +5V Single-Supply Operation
• On-Chip Quadrature Generator, Dual-Modulus Prescaler (/32, /33)
• PLL Phase Detector with Gain-Controlled Charge Pump
• Over 50dB Gain Control Range
• Automatic Baseband Offset Correction

应用 Application

• 宽带系统
• 欧洲DVB兼容系统
• 微波链路
• 美国DSS机顶盒接收器
• 无线本地环路(WLL)