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1300MHz to 2700MHz Variable-Gain
Amplifier with Analog Gain Control
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Operating Circuit with one attenuator connected, V CC = +4.75V to +5.25V, T A = -40°C to +85°C, f IN = 1700MHz to
2500MHz, unless otherwise noted. Typical values are at V CC = +5.0V, R1 = 1.2k ? , R2 = 2k ? , P OUT = +5dBm, f IN = 2100MHz,
V CNTL = 1V, 50 ? system impedance, second attenuator is not connected, T A = +25°C, unless otherwise noted.) (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reverse Isolation
37
dB
Noise Figure
Output 1dB Compression Point
Output 2nd-Order Intercept Point
Output 3rd-Order Intercept Point
Output 3rd-Order Intercept Point
Variation Over Temperature
2nd Harmonic
3rd Harmonic
(Note 5)
From maximum gain to 15dB attenuation, measured at
f 1 + f 2 (Note 6)
From maximum gain to 15dB attenuation (Note 5)
T A = +25°C to +85°C
T A = +25°C to -40°C
From maximum gain to 15dB attenuation, P OUT = +5dBm
From maximum gain to 15dB attenuation, P OUT = +5dBm
6
+23.8
+64
+37
-0.83
-0.6
-65
-83
dB
dBm
dBm
dBm
dB
dBc
dBc
f IN = 1700MHz to 2200MHz,
One attenuator
17
20.7
RF Gain-Control Range
RF Gain-Control Slope
V CNTL = 1V to 4V
f IN = 1450MHz to 1560MHz,
V CNTL = 1V to 4V
V CNTL = 1.8V to 3.5V
Two attenuators
One attenuator
Two attenuators
34
17
34
42.4
22
44
-10
dB
dB/V
Maximum RF Gain-Control Slope Maximum slope vs. gain-control voltage
-15.2
dB/V
Gain Flatness Over
100MHz Bandwidth
Attenuator Switching Time
Attenuator Insertion Loss
Input Return Loss
Output Return Loss
Peak-to-peak for all settings
15dB attenuation change (Note 7)
Second attenuator (IN_A, OUT_A)
Entire band, all gain settings
Entire band, all gain settings
0.5
500
2.2
18
15
dB
ns
dB
dB
dB
Group Delay
Group Delay Flatness Over
100MHz Bandwidth
Group Delay Change vs. Gain
Control
Insertion Phase Change vs. Gain
Control
Input/output 50
Peak to peak
V CNTL = 1V to 4V
V CNTL = 1V to 4V
lines de-embedded
300
20
-70
50
ps
ps
ps
degrees
Note 1: Total supply current reduces as R 1 and R 2 are increased.
Note 2: Operating outside this range for extended periods may affect device reliability. Limit pin input current to 40mA when V CC
is not present.
Note 3: Operation outside this range is possible, but with degraded performance of some parameters.
Note 4: All limits include external component losses, unless otherwise noted.
Note 5: Noise figure increases by approximately 1dB for every 1dB of gain reduction.
Note 6: f 1 = 2100MHz, f 2 = 2101MHz, +5dBm/tone at OUT.
Note 7: Switching time is measured from 50% of the control signal to when the RF output settles to ±1dB.
_______________________________________________________________________________________
3
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