Datasheet

250MHz to 4000MHz Dual,
Analog Voltage Variable Attenuator
MAX19790
6
Typical Operating Characteristics (continued)
(MAX19790 Evaluation Kit, one attenuator connected, V
CC
= +5.0V, P
RF
= -10dBm, T
C
= +25NC, V
CTRL
= +1.0V, unless otherwise noted.)
ATTENUATION vs. V
CTRL
MAX19790 toc23
V
CTRL
(V)
S21 (dB)
32
-25
-20
-15
-10
-5
0
-30
1 4
f
RF
= 950MHz
T
C
= -40°C, +25°C, +85°C
OUTPUT MATCH vs. RF FREQUENCY
MAX19790 toc18
RF FREQUENCY (MHz)
S22 (dB)
300020001000
-40
-30
-20
-10
0
-50
0 4000
T
C
= -40°C
T
C
= +85°C
T
C
= +25°C
SUPPLY CURRENT vs. V
CC
MAX19790 toc16
V
CC
(V)
SUPPLY CURRENT (mA)
5.1255.0004.875
7.0
7.5
8.0
6.5
4.750 5.250
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
S21 PHASE CHANGE vs. V
CTRL
MAX19790 toc24
V
CTRL
(V)
S21 PHASE CHANGE (DEGREES)
32
-25
0
25
50
75
100
-50
1 4
2150MHz
500MHz
250MHz
4000MHz
950MHz
REFERENCED TO INSERTION-LOSS STATE.
POSITIVE PHASE = ELECTRICALLY SHORTER.
INSERTION LOSS vs. RF FREQUENCY
MAX19790 toc19
RF FREQUENCY (MHz)
INSERTION LOSS (dB)
300020001000
2
4
6
8
0
0 4000
T
C
= -40°C
T
C
= +85°C
T
C
= +25°C
INPUT MATCH vs. RF FREQUENCY
MAX19790 toc17
RF FREQUENCY (MHz)
S11 (dB)
300020001000
-40
-30
-20
-10
0
-50
0 4000
T
C
= +25°C
T
C
= +85°C
T
C
= -40°C
INPUT MATCH vs. V
CTRL
MAX19790 toc20
V
CTRL
(V)
S11 (dB)
32
-40
-30
-20
-10
0
-50
1 4
4000MHz
950MHz
250MHz
2150MHz
500MHz
OUTPUT MATCH vs. V
CTRL
MAX19790 toc21
V
CTRL
(V)
S22 (dB)
32
-40
-30
-20
-10
0
-50
1 4
4000MHz
950MHz
250MHz
2150MHz
500MHz
ATTENUATION vs. V
CTRL
MAX19790 toc22
V
CTRL
(V)
S21 (dB)
32
-25
-20
-15
-10
-5
0
-30
1 4
250MHz, 500MHz, 950MHz
2150MHz
4000MHz