MAX2538中文资料正交模式PCS/蜂窝电话/GPS LNA/混频器数据手册ADI规格书

描述 Description

The MAX2351/MAX2354/MAX2358/MAX2359/MAX2530/MAX2531/MAX2537/MAX2538/MAX2539 family of multiband LNA/Mixer ICs is optimized for CDMA, GSM, and TDMA applications in both cellular and PCS bands. In addition, the MAX2530/MAX2531/ MAX2537/MAX2538/MAX2539 ICs feature a GPS LNA/mixer signal path for E911 and Traveler Assistance applications. The cellular and PCS signals can be routed to either IF port. For example, one IF port can be connected to an IF filter with 30kHz bandwidth, while the other port can drive an IF filter with a wider bandwidth. The GPS band has its own IF port.
To optimize dynamic range at minimum current, the MAX2351/MAX2354/MAX2358/MAX2359/MAX2530/MAX2531/MAX2537/MAX2538/MAX2539 implement multiple LNA and mixer states, including high gain/high linearity, high gain/low linearity, mid gain, low gain, and ultra low gain. In high-gain/high-linearity mode, the high-intercept LNA minimizes desensitization in the presence of a large interfering signal. For the other gain states, the LNA current is reduced to improve standby time. Each band is implemented with a separate mixer to optimize performance for the specific band, and each mixer provides multiple linearity modes to optimize linearity and current consumption. The ultra-low gain mode operates with very little current, which results in significant power savings because the handset typically spends most of its time in this mode.

特性 Features

• Low LNA Noise Figure
• Cellular: 0.9dB
• No External GPS VCO Required
• Triple Band, Quadruple Mode
• Ultra Low Current:

应用 Application

• E911和GPS旅行助理
• 三频、四模PCS/蜂窝手机

简介

MAX2538属于RF/IF射频/中频RFID的射频混频器。由制造生产的MAX2538射频混频器射频混频器又称混频器，这些器件具有三个端口，用于改变两个输入信号的频率。射频混频器是一些无源或有源器件，可用于对信号进行上下变频。特征包括射频类型、频率、混频器数、增益、噪声系数、辅助属性、电流和电压。频率范围为 0 至 90 GHz，混频器数为 1、2、3 或 4。