MAX2840-MAX2841 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – 5GHz Linear Power Amplifiers

19-2494; Rev 2; 8/03
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5GHz Linear Power Amplifiers
General Description
The MAX2840/MAX2841 low-cost linear power ampli-
fiers (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 sys-
tems. The MAX2840 delivers +15dBm output power,
and the MAX2841 delivers +18dBm output power.
The 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 perfor-
mance. 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 ✕
1.5mm chip-scale package (UCSP™), which signifi-
cantly minimizes parasitic effects and reduces the
required board area.
Applications
IEEE 802.11a OFDM WLAN
HiperLAN2 WLAN
5GHz Cordless Phones
Functional Diagram
SHDN
P_DET
BIAS
BIAS
CIRCUIT
V_CC
DETECTOR
MAX2840
MAX2841
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 ✕ 1.5mm Chip-Scale Package
Ordering Information
PART
TEMP RANGE
MAX2840EBC-T -40°C to +85°C
MAX2841EBC-T -40°C to +85°C
PIN-
PACKAGE
3 ✕ 4 UCSP
3 ✕ 4 UCSP
TOP
MARK
AAT
AAU
Typical Operating Circuit appears at end of data sheet.
Pin Configuration
SHDN
A1
GND
A2
BIAS
CIRCUIT
RF_IN
B2
BIAS
C1
MAX2840
MAX2841 ^GND
C2
V_CC
P_DET
A3
C3
RF_IN
RF_OUT
DET
GND GND
GND GND
A4
B4
C4
GND
RF_OUT
GND
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.