The MAX2242 low-voltage linear power amplifier (PA) is designed for 2.4GHz ISM-band wireless LAN applications. It delivers +22.5dBm of linear output power with an adjacent-channel power ratio (ACPR) compliant with the IEEE 802.11b 11MB/s WLAN standard and at least 3dB margin. The PA is packaged in a tiny 3x4 chip-scale package (UCSP™) measuring only 1.5mm x 2.0mm, making it ideal for radios built in small PC card and compact flash card form factors. The MAX2242 PA consists of a three-stage PA, power detector, and power management circuitry. The power detector provides over 20dB of dynamic range with ±0.8dB accuracy at the highest output power level. An accurate automatic level control (ALC) function can be easily implemented using this detector circuit. The PA also features an external bias control pin, allowing the current to be throttled back at lower output power levels while maintaining sufficient ACPR performance. As a result, the highest possible efficiency is maintained at all power levels. The device operates over a single +2.7V to +3.6V power-supply range. An on-chip shutdown feature reduces operating current to 0.5µA, eliminating the need for an external supply switch.
The MAX2242 is a low‑voltage linear power amplifier designed for 2.4 GHz ISM‑band wireless LAN applications. It delivers up to +22.5 dBm output power in a tiny 1.5 mm × 2.0 mm UCSP package and supports single‑supply operation from 2.7 V to 3.6 V.
The datasheet provides absolute maximum ratings, detailed electrical characteristics, typical operating curves, pin descriptions, and layout recommendations, including bias control, shutdown mode, and external matching guidelines. This manual is written in Chinese.
| Frequency Range | 2.4 GHz – 2.5 GHz |
|---|---|
| Supply Voltage | 2.7 V – 3.6 V |
| Output Power (max) | +22.5 dBm |
| Power Gain | 28.5 dB |
| Shutdown Current | 0.5 µA |
| Package Size | 1.5 mm × 2.0 mm UCSP |
The device draws only 0.5 µA in shutdown mode.
It is housed in a 1.5 mm × 2.0 mm UCSP (chip‑scale) package.
The amplifier operates from 2.7 V to 3.6 V.