Datasheet

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MAX2090
50MHz to 1000MHz Analog VGA and Power
Detector with Optional AGC Loop
Typical Operating Characteristics (continued)
(Typical Application Circuit with analog attenuator set to minimum attenuation (V
PLVLSET
= 2.5V), V
CC
= 5.5V, T
C
= +25NC, f
RF_IN
=
350MHz, P
RF_IN
= -25dBm, R
SOURCE
= R
LOAD
= 50I, CTRL1 = 0, CTRL2 = 1, ALM_THRES = ALM = open, unless otherwise noted.)
INPUT MATCH
vs. ATTENUATOR SETTING
MAX2090 toc07
S11 (dB)
-25
-20
-15
-10
-30
V
PLVLSET
(V)
0 2.52.01.51.00.5
1000MHz
500MHz
350MHz
50MHz
OUTPUT MATCH
vs. ATTENUATOR SETTING
MAX2090 toc08
S22 (dB)
-25
-20
-15
-10
-5
0
-30
V
PLVLSET
(V)
0 2.52.01.51.00.5
50MHz
500MHz
1000MHz
350MHz
REVERSE ISOLATION OVER ATTENUATOR
SETTING vs. RF FREQUENCY
MAX2090 toc09
REVERSE ISOLATION (dB)
30
40
50
60
70
80
20
V
PLVLSET
= 2.5V
V
PLVLSET
= 0V
RF FREQUENCY (MHz)
50 1050850650450250
S21 PHASE CHANGE
vs. ATTENUATOR SETTING
MAX2090 toc10
S21 PHASE CHANGE (DEG)
-60
-30
0
30
60
90
-90
V
PLVLSET
(V)
0 2.52.01.51.00.5
350MHz
1000MHz
POSITIVE PHASE = ELECTRICALLY SHORTER
REFERENCED TO
HIGH GAIN STATE
500MHz
50MHz
NOISE FIGURE vs. RF FREQUENCY
MAX2090 toc11
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
3
4
5
6
7
2
50 1050
850650450250
T
C
= +25°C
T
C
= +95°C
T
C
= -40°C
NOISE FIGURE vs. RF FREQUENCY
MAX2090 toc12
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
3
4
5
6
7
2
50 1050
850650450250
V
CC
= 4.75V, 5.00V, 5.50V, 5.80V