آر اف (فرکانس رادیویی) و بی‌سیم تقویت‌کننده‌ آر اف

Product Attributes

Features

• 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 +17 dBm 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 overdesign 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.
• Low Average CDMA Current Consumption in Typical Urban Scenario 55mA (MAX2267) 90mA (MAX2268) 50mA (MAX2269)
• 0.5μ 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

Applications

• Cellular-Band CDMA Phones
• Cellular-Band PDC Phones
• 2-Way Pagers
• Power-Amplifier Modules