Datasheet
MAX2051
Typical Operating Characteristics (continued)
(
Typical Application Circuit
, Downconversion mode, V
CC
= +5.0V, P
LO
= 0dBm, P
RF
= 0dBm, f
RF
= 1200MHz, LO is high-side
injected, T
C
= +25°C, unless otherwise noted.)
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
8 _______________________________________________________________________________________
RF-TO-IF ISOLATION vs. LO FREQUENCY
(DOWNCONVERSION MODE)
MAX2051 toc19
LO FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
2010182016301440
40
50
60
70
80
20
30
1250 2200
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
f
RF
= 1200MHz
MAX2051 toc20
RF-TO-IF ISOLATION vs. LO FREQUENCY
(DOWNCONVERSION MODE)
LO FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
2010182016301440
40
50
60
70
80
20
30
1250 2200
P
LO
= -3dBm, 0dBm, +3dBm
f
RF
= 1200MHz
MAX2051 toc21
RF-TO-IF ISOLATION vs. LO FREQUENCY
(DOWNCONVERSION MODE)
LO FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
2010182016301440
40
50
60
70
80
20
30
1250 2200
V
CC
= 4.75V, 5.0V, 5.25V
f
RF
= 1200MHz
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)
MAX2051 toc22
LO LEAKAGE AT RF PORT (dBm)
-40
-35
-30
-25
-20
-50
-45
LO FREQUENCY (MHz)
20101820163014401250 2200
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
MAX2051 toc23
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)
LO LEAKAGE AT RF PORT (dBm)
-40
-35
-30
-25
-20
-50
-45
LO FREQUENCY (MHz)
20101820163014401250 2200
P
LO
= -3dBm, 0dBm, +3dBm
MAX2051 toc24
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)
LO LEAKAGE AT RF PORT (dBm)
-40
-35
-30
-25
-20
-50
-45
LO FREQUENCY (MHz)
20101820163014401250 2200
V
CC
= 4.75V, 5.0V, 5.25V
RF PORT RETURN LOSS vs. RF FREQUENCY
(DOWNCONVERSION MODE)
MAX2051 toc25
RF FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
1400130012001100
20
15
10
5
0
30
25
1000 1500
f
IF
= 200MHz
P
LO
= -3dBm, 0dBm, +3dBm
MAX2051 toc26
207517501425
15
10
5
0
20
1100 2400
RF PORT RETURN LOSS vs. LO FREQUENCY
(DOWNCONVERSION MODE)
LO FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
f
IF
= 50MHz TO 1000MHz
f
RF
= 1400MHz
f
RF
= 1300MHz
f
RF
= 1100MHz
f
RF
= 1200MHz
MAX2051 toc27
810620430240
25
20
15
10
5
0
30
50 1000
IF PORT RETURN LOSS vs. IF FREQUENCY
(DOWNCONVERSION MODE)
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
V
CC
= 4.75V, 5.0V, 5.25V