آر اف (فرکانس رادیویی) و بی‌سیم تقویت‌کننده‌ آر اف

Product Attributes

Features

• The MAX2232/MAX2233 low-voltage, silicon RF power amplifiers (PAs) are designed for use in the 900MHz ISM band.
• They operate from a single +2.7V to +5.5V supply, allowing them to be powered directly from a 3-cell NiCd or a 1-cell Lithium-Ion battery.
• The devices typically deliver 250mW (+24dBm) of output power at 915MHz from a single +3.6V supply, or 150mW (+22dBm) from a single +2.7V supply.
• At +24 dBm output power, power-added efficiency (PAE) is 44%.
• The MAX2232/MAX2233 provide 24dB of gain, which is adjustable over a continuous 24dB span via the analog gain-control pin of the MAX2232 or in two 10dB steps via the 2-bit programmable gain-control DAC of the MAX2233.
• An external capacitor sets the RF output power envelope ramp time, reducing spurious emissions during power-up and power-down by providing a gradual change in output power (MAX2232).
• The MAX2232/MAX2233 feature a low-power shutdown mode, which typically draws less than 1μA of supply current, saving power during “idle slots” in time-division multiple-access (TDMA) systems.
• The VSWR of the RF input in shutdown mode relative to normal operation is 1.2:1.
• The devices also feature a thermal shutdown function, enabling the PA to protect itself from excessive temperature conditions that could damage the IC.
• A capacitor to ground limits thermal cycling by setting a thermal shutdown timeout period.
• The MAX2232/MAX2233 are available in a space-saving, thermally enhanced 16-pin power-QSOP (PQSOP) package.
• 800MHz to 1000MHz Frequency Range
• 250mW (+24dBm) Output Power at 915MHz from +3.6V Supply
• +2.7V to +5.5V Single-Supply Operation
• 44% Power-Added Efficiency
• 24dB Power Gain
• 24dB Analog Gain-Control Range (MAX2232)
• Three Levels of Digitally Programmed Power Gain in 10dB Steps (MAX2233)
• Programmable RF Power Envelope Ramping (MAX2232)
• Thermal Shutdown
• Programmable Thermal Shutdown Timeout Period
• 0.2μA Low-Power Shutdown Mode
• Low VWSR in Standby and Shutdown Modes

Applications

• 900MHz ISM Band Digital Cordless Phones
• Wireless Data
• FM Analog Transmitters
• 868MHz European ISM Band