Datasheet

250MHz to 4000MHz Dual,
Analog Voltage Variable Attenuator
MAX19790
4
Typical Operating Characteristics
(MAX19790 Evaluation Kit, two attenuators in cascade, V
CC
= +5.0V, P
RF
= -10dBm, T
C
= +25NC, V
CTRL
= +1.0V, unless otherwise noted.)
SUPPLY CURRENT vs. V
CC
MAX19790 toc01
V
CC
(V)
SUPPLY CURRENT (mA)
5.1255.0004.875
7.0
7.5
8.0
6.5
4.750 5.250
T
C
= +25°C
T
C
= +85°C
T
C
= -40°C
INPUT MATCH vs. RF FREQUENCY
MAX19790 toc02
RF FREQUENCY (MHz)
S11 (dB)
300020001000
-30
-20
-10
0
-40
0 4000
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
OUTPUT MATCH vs. RF FREQUENCY
MAX19790 toc03
RF FREQUENCY (MHz)
S22 (dB)
300020001000
-30
-20
-10
0
-40
0 4000
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
INSERTION LOSS vs. RF FREQUENCY
MAX19790 toc04
RF FREQUENCY (MHz)
INSERTION LOSS (dB)
300020001000
2
4
6
8
10
12
0
0 4000
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
INPUT MATCH vs. V
CTRL
MAX19790 toc05
V
CTRL
(V)
4000MHz
500MHz
2150MHz
950MHz
S11 (dB)
32
-30
-20
-10
0
-40
1 4
250MHz
OUTPUT MATCH vs. V
CTRL
MAX19790 toc06
V
CTRL
(V)
4000MHz
500MHz
2150MHz
950MHz
S22 (dB)
250MHz
32
-30
-20
-10
0
-40
1 4
ATTENUATION vs. V
CTRL
MAX19790 toc07
V
CTRL
(V)
4000MHz
2150MHz
S21 (dB)
32
-50
-40
-30
-20
-10
0
-60
1 4
250MHz, 500MHz, 950MHz
ATTENUATION vs. V
CTRL
MAX19790 toc08
V
CTRL
(V)
f
RF
= 950MHz
S21 (dB)
32
-50
-40
-30
-20
-10
0
-60
1 4
T
C
= -40°C, +25°C, +85°C
S21 PHASE CHANGE vs. V
CTRL
MAX19790 toc09
V
CTRL
(V)
4000MHz
950MHz
500MHz
2150MHz
S21 PHASE CHANGE (DEGREES)
32
0
50
100
150
200
-50
1 4
REFERENCED TO INSERTION-LOSS STATE.
POSITIVE PHASE = ELECTRICALLY
SHORTER.
250MHz