MAX2235(1999) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2235 Datasheet PDF : 8 Pages
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+3.6V, 1W Autoramping Power
Amplifier for 900MHz Applications
AC ELECTRICAL CHARACTERISTICS
(MAX2235 Evaluation Kit, GC = unconnected, PRFIN adjusted to give PRFOUT = +30dBm, fRFIN = 836MHz, VCC = V SHDN = +3.6V,
TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Operational Frequency Range
(Note 2)
fRFIN
800
1000 MHz
Minimum Output Power
Power Added Efficiency
PRFOUT
PAE
VCC = 5.0V
VCC = 3.6V
VCC = 3.0V (Note 2)
VCC = 3.0V, TA = TMIN to TMAX
VCC = 2.7V
32.5
30.3
27.0 28.7
25.5
28.0
47
dBm
%
Average Supply Current
PRFOUT = +30dBm
ICC
PRFIN adjusted to give PRFOUT = +24dBm
PRFIN = 0dBm, VGC adjusted to give
PRFOUT = 24dBm
610
315
mA
305
Power Gain
Gain-Control Range (Note 3)
GP
0.6V < VGC < 2.3V
24
26
dB
37
dB
Auto-Power Ramping-Up
Maximum Slope (Note 4)
dP/dt
1.6
mW/µs
Auto-Power Ramping-Down
Minimum Slope (Note 4)
dP/dt
-1.3
mW/µs
Input VSWR
Standby Mode Input VSWR
Change
VSWR
∆VSWR
50Ω source impedance
Input VSWR relative to input impedance in
operating mode
1.5:1
1.5:1
Maximum Nonharmonic
Spurious Output Due to Load
Mismatch
Noise Power
Harmonic Suppression (Note 5)
Off-Isolation
VCC = 2.7V to 5.5V, 6:1 VSWR at any phase
angle
30kHz BW at offset = 45MHz
PRFIN = +7dBm
PRFIN = 0dBm
V SHDN = 0.5V
GC = GND
-60
-90
30
38
40
48
25
36
dBc
dBm
dBc
dB
Note 1: Guaranteed by design and characterization.
Note 2: For optimum performance at a given frequency, design the output matching network for maximum output power.
Note 3: Gain is monotonic with VGC.
Note 4: 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 5: 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.
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