MAX2530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

MAX2530属于集成电路（IC）的线性+开关稳压器。由制造生产的MAX2530稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。