General Description

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.

Features

♦ 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

Applications

  Cellular-Band CDMA Phones

  Cellular-Band PDC Phones

  2-Way Pagers

  Power-Amplifier Modules