MAX2242 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – 2.4GHz to 2.5GHz Linear Power Amplifier

19-1912; Rev 3; 11/03
EVAALVUAAILTAIOBNLEKIT
2.4GHz to 2.5GHz Linear Power Amplifier
General Description
The MAX2242 low-voltage linear power amplifier (PA) is
designed for 2.4GHz ISM-band wireless LAN applica-
tions. 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 com-
pact 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 main-
taining 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 fea-
ture reduces operating current to 0.5µA, eliminating the
need for an external supply switch.
________________________Applications
IEEE 802.11b DSSS Radios
Wireless LANs
HomeRF
2.4GHz Cordless Phones
2.4GHz ISM Radios
Features
o 2.4GHz to 2.5GHz Operating Range
o +22.5dBm Linear Output Power (ACPR of <-33dBc
1st-Side Lobe and <-55dbc 2nd-Side Lobe)
o 28.5dB Power Gain
o On-Chip Power Detector
o External Bias Control for Current Throttleback
o +2.7V to +3.6V Single-Supply Operation
o 0.5µA Shutdown Mode
o Tiny Chip-Scale Package (1.5mm ✕ 2.0mm)
Ordering Information
PART
TEMP RANGE
MAX2242EBC-T -40°C to +85°C
PIN-
PACKAGE
3 ✕ 4 UCSP
TOP
MARK
AAE
Pin Configuration
RF_IN
GND
V_CC1
C4
B4
A4
GND
C3
BIAS
A3
CIRCUIT
V_CCB
SHDN
C2
PD_OUT
B2
V_CC2
A2
Actual Size
DET
1.5mm ✕ 2.0mm
Typical Application Circuit appears at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
C1
B1
A1
BIAS
RF_OUT
GND
3✕4 UCSP
________________________________________________________________ Maxim Integrated Products 1
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