Datasheet

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MAX2090
50MHz to 1000MHz Analog VGA and Power
Detector with Optional AGC Loop
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit with analog attenuator set to minimum attenuation, V
CC
= 4.75V to 5.8V, f
RF
= 350MHz, -40NC < T
C
<
+95NC, and RF ports are connected to 50I sources, unless otherwise noted. Typical values are at T
C
= +25NC, V
CC
= 5.0V,
P
RF_IN
= -25dBm, V
PLVLSET
= 2.5V, CTRL1 = 0, CTRL2 = 1. Min/max specifications apply over supply, process, and temperature,
unless otherwise noted.) (Note 7)
DC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, V
CC
= 4.75V to 5.8V, V
GND
= 0V, and T
C
= -40NC to +95NC. Typical values are at V
CC
= 5.0V,
V
PLVLSET
= 1.65V, and T
C
= +25NC, unless otherwise noted.)
RECOMMENDED AC OPERATING CONDITIONS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PLVLSET Maximum Control
Voltage
2.3 2.4 2.5 V
ALM_THRES Input Resistance 90 135
kI
ALM_THRES Input Voltage
Range
(Note 5) 0 2.5 V
ALM Output Logic 1 3.135 3.3 3.465 V
ALM Output Logic 0 0.4 V
DET_IN Input Resistance 60 100
kI
DET_VOUT Output Resistance 175 235 295
kI
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RF Frequency f
RF
(Note 6) 50 1000 MHz
RF Input Power Range P
RFIN
ALC closed loop, CTRL1 = CTRL2 = 1
(Note 6)
-30 +1 dBm
RMS Detector Input Power
Range
ALC open loop, CTRL1 = 0, CTRL2 = 1
(Note 6)
-30 +14 dBm
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Small-Signal Gain G
T
C
= +25NC, V
CC
= 5.0V (Note 5)
24.5 25.5 26.5
dB
(Note 8) 23.5 25.5 27.5
Gain vs. Temperature -0.004
dB/NC
Maximum Gain Variation vs.
Frequency
f
RF
Q50MHz
0.25
dB
f
RF
Q80MHz
0.4
f
RF
Q100MHz
0.5
Noise Figure NF (Note 5) 4 5.7 dB
Total Attenuation Range V
PLVLSET
= 0.2V to 2.5V (Note 8) 35 37 dB
Group-Delay Variation
Within Q50MHz
150
ps
Within Q80MHz
250
Within Q100MHz
300