MAX2268

+2.7V、单电源、蜂窝频段线性功率放大器

业内最高整体效率的单电源、双模CDMA功率放大器,用于日本900MHz市场


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说明

The MAX2267/MAX2268/MAX2269 power amplifiers are optimized for IS-98-based CDMA and PDC cellular telephones operating in the Japanese cellular-frequency band. When matched for CDMA operation, the amplifiers achieve 27dBm output power with 35% efficiency (MAX2268), with margin over the adjacent and alternate channel specification. At a +17dBm output-a very common power level for CDMA phones-the MAX2268 still has 7% efficiency, yielding excellent overall talk time. At the same power level, the MAX2267/MAX2269 have an unprecedented 12%/17% efficiency, while still obtaining 28%/29% efficiency at maximum output power.

The MAX2267/MAX2268/MAX2269 have internally referenced bias ports that are normally terminated with simple resistors. The bias ports allow customization of ACPR margin and gain. They can also be used to "throttle back" bias current when generating low power levels. The MAX2267/MAX2268/MAX2269 have excellent gain stability over temperature (±0.8dB), so over-design of driver stages and excess driver current are dramatically reduced, further increasing the phone's talk time. The devices can be operated from +2.7V to +4.5V while meeting all ACPR specifications over the entire temperature range.

The devices are packaged in a 16-pin TSSOP with exposed paddle (EP). For module or direct chip attach applications, the MAX2267 is also available in die form.
MAX2267、MAX2268、MAX2269:典型工作电路 MAX2267、MAX2268、MAX2269:典型工作电路 放大+

关键特性

  • Low Average CDMA Current Consumption in Typical Urban Scenario
    • 55mA (MAX2267)
    • 90mA (MAX2268)
    • 50mA (MAX2269)
  • 0.5µA Shutdown Mode Eliminates External Supply Switch
  • ±0.8dB Gain Variation Over Temperature
  • No External Reference or Logic Interface Circuitry Needed
  • Supply Current and ACPR Margin Dynamically Adjustable
  • +2.7V to +4.5V Single-Supply Operation
  • 35% Efficiency at +2.7V Operation

应用

  • 双向寻呼器
  • 蜂窝波段CDMA电话
  • 蜂窝波段PDC电话
  • 功放模块

技术资料

设计指南 5100 RF和混合信号PCB的一般布局指南
应用笔记 335 Maxim无线/射频功率放大器选择指南

质量和环境数据

产品可靠性报告: MAX2268.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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