MAX2840

Features:

·5GHz to 6GHz Operating Frequency Range
·High Linear Output Power
      +15dBm at 5.25GHz (MAX2840)
      +18dBm at 5.25GHz (MAX2841)
·22dB Power Gain
·On-Chip Detector With 15dB Dynamic Range and ±1.0dB Detector Accuracy
·Simple Input and Output Matching
·+2.7V to +3.6V Single Supply
·Shutdown Mode With Less than 10µA Current
·2mm X 1.5mm Chip-Scale Package


Application

·IEEE 802.11a OFDM WLAN
·HiperLAN2 WLAN
·5GHz Cordless Phones


Pinout




Specifications

V_CC to GND............................................................-0.3V to +4.2V
SHDN , BIAS, P_DET, RF_OUT to GND .........-0.3V to (VCC + 0.3V)
RF_IN to GND........................................................-0.3V to +0.9V
Input Power .................................................................. +10dBm
Max VSWR Without Damage.................................................10:1
Max VSWR for Stable Operation .............................................5:1
Continuous Operating Lifetime.................10yrs X 0.93(TA - 60)
(for operating temperature 60°C < T_A < 85)
Continuous Power Dissipation (T_A = +85)
3 ✕ 4 UCSP (derate 80mW/°C above +85) .................... 1.6W
Operating Temperature Range ..............................-40 to +85
Thermal Resistance ...........................................................25/W
Junction Temperature........................................................+150
Storage Temperature Range ...............................-65 to +125
Soldering Temperature (10s) ............................................+260


Description

The MAX2840/MAX2841 low-cost linear power amplifiers (PAs) operate in the 5GHz to 6GHz band. The PAs are designed for high gain and high linearity, which makes them ideal for use in IEEE 802.11a OFDM systems. The MAX2840 delivers +15dBm output power, and the MAX2841 delivers +18dBm output power.

The MAX2840/MAX2841 devices integrate a power detector that provides over 15dB dynamic range and ±1.0dB accuracy. With the detector circuit built in, an automatic level control (ALC) function can be easily implemented.

The PAs also feature an external bias control function. The idle current can be adjusted through an external DAC to improve efficiency at reduced output powers while maintaining sufficient ACPR and EVM performance. As a result, the highest possible efficiency is maintained at all power levels. The MAX2840/MAX2841 operate over a single +2.7V to +3.6V power-supply range. An on-chip shutdown feature reduces operating current to less than 10µA, eliminating the need for an external supply switch.

The MAX2840/MAX2841 are packaged in a 2mm X 1.5mm chip-scale package (UCSP™), which significantly minimizes parasitic effects and reduces the required board area.