MAX2242

2.4GHz to 2.5GHz Linear Power Amplifier

2.4GHz PA Delivers +23 dBm Linear Output Power

Data Sheet (Rev. 3)
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Overview

  • 2.4GHz to 2.5GHz Operating Range
  • +22.5dBm Linear Output Power (ACPR of <-33dBc 1st-Side Lobe and <-55dbc 2nd-Side Lobe)
  • 28.5dB Power Gain
  • On-Chip Power Detector
  • External Bias Control for Current Throttleback
  • +2.7V to +3.6V Single-Supply Operation
  • 0.5µA Shutdown Mode
  • Tiny Chip-Scale Package (1.5mm x 2.0mm)

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) of <-33dBc 1st-side lobe and <-55dBc 2nd-side lobe, compliant with the IEEE® 802.11b 11MB/s WLAN standard with at least 3dB margin. The PA is packaged in the tiny 3x4 chip-scale package (UCSP™), measuring only 1.5mm x 2.0mm, 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. Through the use of an external DAC, the current can 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.

Applications

  • 2.4GHz Cordless Phones
  • 2.4GHz ISM Radios
  • HomeRF
  • IEEE 802.11b DSSS Radios
  • Wireless Local Area Networks (WLANs)
MAX2242
2.4GHz to 2.5GHz Linear Power Amplifier
MAX2242: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Application Note 2

Technical Articles 4

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Low-Noise Amplifiers (LNAs) & Power Amplifiers 2
MAX2644
PRODUCTION 2.4GHz SiGe, High IP3 Low-Noise Amplifier
MAX2247
2.4GHz SiGe Linear Power Amplifier
Oscillators 3
MAX2750
PRODUCTION 2.4GHz Monolithic Voltage-Controlled Oscillators
MAX2751
PRODUCTION 2.4GHz Monolithic Voltage-Controlled Oscillators
MAX2752
PRODUCTION 2.4GHz Monolithic Voltage-Controlled Oscillators
RF Analog Transceivers 3
MAX2820
2.4GHz 802.11b Zero-IF Transceivers
MAX2830
PRODUCTION 2.4GHz to 2.5GHz 802.11g/b RF Transceiver with PA and Rx/Tx/Diversity Switch
MAX2831
PRODUCTION 2.4GHz to 2.5GHz, 802.11g RF Transceivers with Integrated PA
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