5GHz Linear Power Amplifiers

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3

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input VSWR

1.8:1

Output VSWR

1.9:1

Nonharmonic Spurious Output

-60

dBc

Power Ramp Turn-On Time

SHDN from low to high (Note 8)

1

1.5

µs

Power Ramp Turn-Off Time

SHDN from high to low (Note 8)

1

1.5

µs

RF Output Detector Response

Time

External capacitor, C = 10pF

0.5

1.5

µs

1.1

1.2

1

1

0.7

RF Output Detector Voltage

Range

Load >100kΩ (Note 7)

0.7

V

RF Output Detector Accuracy

When output detector voltage = 1.2V

±1

dB

RF Output Detector Slope

At maximum output power

6

dB/V

AC ELECTRICAL CHARACTERISTICS (continued)

Note 2: 5.25GHz 64-QAM modulated OFDM signal is applied at RF input port.

Note 3: Min and max values are guaranteed by design and characterization.

Note 4: Operation outside of this frequency range is possible but not guaranteed.

Note 5: Specifications are corrected for board losses on the EV kits (0.3dB at the input, 0.3dB at the output).

Note 6: RF input signal is following IEEE 802.11a standards.

Note 7: Specifications are corrected for board losses on the EV kits (0.3dB at the output).

Note 8: The total turn-on/settling time required for PA output power is within 0.5dB range of the final value.

Typical Operating Characteristics

SUPPLY VOLTAGE (V)

3.3

3.0

120

140

160

180

100

2.7

3.6

MAX2840

SUPPLY CURRENT vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

0.05

0.10

0.15

0.20

0.25

0.30

0

2.7

3.6

MAX2840

SHUTDOWN CURRENT vs. SUPPLY VOLTAGE