max2242 Maxim Integrated Products, Inc., max2242 Datasheet

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max2242

Manufacturer Part Number
max2242
Description
Max2242 2.4ghz To 2.5ghz Linear Power Amplifier
Manufacturer
Maxim Integrated Products, Inc.
Datasheet

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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.
19-1912; Rev 3; 11/03
Typical Application Circuit appears at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________Applications
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.
IEEE 802.11b DSSS Radios
Wireless LANs
HomeRF
2.4GHz Cordless Phones
2.4GHz ISM Radios
2.4GHz to 2.5GHz Linear Power Amplifier
________________________________________________________________ Maxim Integrated Products
1.5mm
Actual Size
General Description
2.0mm
o 2.4GHz to 2.5GHz Operating Range
o +22.5dBm Linear Output Power (ACPR of <-33dBc
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
MAX2242EBC-T
1st-Side Lobe and <-55dbc 2nd-Side Lobe)
PART
SHDN
V
CCB
RF_IN
BIAS
C3
C2
C1
C4
-40°C to +85°C
TEMP RANGE
Ordering Information
3
CIRCUIT
RF_OUT
PD_OUT
4 UCSP
BIAS
DET
GND
B4
B2
B1
Pin Configuration
3
PACKAGE
PIN-
4 UCSP
2.0mm)
Features
GND
V
GND
A3
A4
A1
A2
CC1
V
CC2
MARK
TOP
AAE
1

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max2242 Summary of contents

Page 1

... 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 ± ...

Page 2

Linear Power Amplifier ABSOLUTE MAXIMUM RATINGS GND (no RF signal applied) ..........-0.3V to +5.5V CC1 CC2 RF Input Power ...............................................................+10dBm SHDN, BIAS, PD_OUT, RF_OUT ................-0. Input Current at RF_IN Port.............................-1mA ...

Page 3

... AC ELECTRICAL CHARACTERISTICS (MAX2242 Evaluation Kit +3.3V wise noted.) (Note 6) PARAMETER Frequency Range (Notes 3, 4) Power Gain (Notes 1, 3) Gain Variation Over Temperature (Note 3) Gain Variation Over V (±10%) CC (Note 3) Output Power (Notes Saturated Output Power Harmonic Output (2f, 3f, 4f) Input VSWR Output VSWR ...

Page 4

Linear Power Amplifier (V = +3.3V 2.45MHz, RF modulation = IEEE 802.11b GAIN vs. SUPPLY VOLTAGE +22dBm T = -40° +25° ...

Page 5

... OUTPUT POWER HISTOGRAM AT FIXED 20 SIGMA = 0.75dBm BASED ON 100 PARTS 2 S22 28 27 S11 26 25 2460 2480 2500 2400 p2.4GHz to 2.5GHz = +25°C, unless otherwise noted.) A 0.5V POWER DETECTOR VOLTAGE 2.8 3.4 4.0 4.6 5.2 5.8 6.4 7.0 OUTPUT POWER (dBm) MAX2242 S21 vs. FREQUENCY P = -15dBm IN 2420 2440 2460 2480 2500 FREQUENCY (MHz) 5 ...

Page 6

... C4 RF_IN RF Input. Requires external matching. Detailed Description The MAX2242 is a linear PA intended for 2.4GHz ISM- band wireless LAN applications. The PA is fully charac- terized in the 2.4GHz to 2.5GHz ISM band. The PA consists of two driver stages and an output stage. The MAX2242 also features an integrated power detector and power shutdown control mode ...

Page 7

... PC board layout as a guide. Power Detector Layout and Thermal Management Issues The MAX2242 EV kit serves as a layout guide. Use con- trolled-impedance lines on all high-frequency inputs and outputs. The GND pins also serve as heat sinks. Connect all GND pins directly to the topside RF ground. ...

Page 8

... Linear Power Amplifier NOTE: REFER TO MAX2242 EV KIT DATA SHEET FOR DETAILED LAYOUT INFORMATION. UCSP reliability performance shows that it is capable of performing reliably through environmental stresses. Users should also be aware that as with any intercon- nect system there are electromigration-based current limits that, in this case, apply to the maximum allowable current in the bumps ...

Page 9

... For the latest package outline information go to www.maxim-ic.com/packages.) Note: MAX2242 does not use bump B3. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

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