(MAX2235 Evaluation Kit, GC = unconnected, PRFIN adjusted to give PRFOUT = +30dBm, fRFIN = 836MHz, VCC = VSHDN = +3.6V,

TA = +25°C, unless otherwise noted.) (Note 3)

AC Electrical Characteristics

Note 1: ≥ +25°C guaranteed by production test, <+25°C guaranteed by design and characterization.

Note 2: MAX guaranteed by production test, MIN guaranteed by design and characterization.

Note 3: Guaranteed by design and characterization.

Note 4: For optimum performance at a given frequency, design the output matching network for maximum output power.

Note 5: Gain is monotonic with VGC.

Note 6: 0.068μF capacitor from RAMP to REF. Time is measured from SHDN low-to-high transition to +29dBm output power, or

from SHDN high-to-low transition to -25dBm output power.

Note 7: Harmonics measured on the evaluation kit, which provides some harmonic attenuation in addition to the rejection provided

by the IC. The combined suppression is specified.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Operational Frequency Range

(Note 4)

fRFIN

800

1000

MHz

Minimum Output Power

PRFOUT

VCC = 5.0V

32.5

dBm

VCC = 3.6V

30.3

VCC = 3.0V (Note 4)

27.0

28.7

VCC = 3.0V, TA = TMIN to TMAX

25.5

VCC = 2.7V

28.0

Power Added Efficiency

PAE

47

%

Average Supply Current

ICC

PRFOUT = +30dBm

610

mA

PRFIN adjusted to give PRFOUT = +24dBm

315

PRFIN = 0dBm, VGC adjusted to give

PRFOUT = 24dBm

305

Power Gain

GP

24

26

dB

Gain-Control Range (Note 5)

0.6V < VGC < 2.3V

37

dB

Auto-Power Ramping-Up

Maximum Slope (Note 6)

dP/dt

1.6

mW/μs

Auto-Power Ramping-Down

Minimum Slope (Note 6)

dP/dt

-1.3

mW/μs

Input VSWR

VSWR

50Ω source impedance

1.5:1

Standby Mode Input VSWR

Change

ΔVSWR

Input VSWR relative to input impedance in

operating mode

1.5:1

Maximum Nonharmonic

Spurious Output Due to Load

Mismatch

VCC = 2.7V to 5.5V, 6:1 VSWR at any

phase angle

-60

dBc

Noise Power

30kHz BW at offset = 45MHz

-90

dBm

Harmonic Suppression (Note 7)

PRFIN = +7dBm

30

38

dBc

Off-Isolation

PRFIN = 0dBm

VSHDN = 0.5V

40

48

dB

GC = GND

25

36

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MAX2235

+3.6V, 1W Autoramping Power

Amplifier for 900MHz Applications