Datasheet
MAX2031
High-Linearity, 650MHz to 1000MHz Upconversion/
Downconversion Mixer with LO Buffer/Switch
8 _______________________________________________________________________________________
30
20
25
10
15
5
0
RF PORT RETURN LOSS
vs. RF FREQUENCY
MAX2031 toc31
RF FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
750 850 900800 950 1000 1050
P
LO
= -3dBm, 0dBm, +3dBm
50
35
40
45
30
25
20
15
10
5
0
0 200100 300 400 500
IF PORT RETURN LOSS
vs. IF FREQUENCY
MAX2031 toc32
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
V
CC
= 4.75V, 5.0V, 5.25V
INCLUDES IF TRANSFORMER
50
35
40
45
30
25
20
15
10
5
0
0 200100 300 400 500
IF PORT RETURN LOSS
vs. IF FREQUENCY
MAX2031 toc33
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
INCLUDES IF TRANSFORMER
P
LO
= -3dBm, 0dBm, +3dBm
40
35
30
25
20
15
10
5
0
800 900 1000 1100 1200 1300
LO SELECTED RETURN LOSS
vs. LO FREQUENCY
MAX2031 toc34
LO FREQUENCY (MHz)
LO SELECTED RETURN LOSS (dB)
P
LO
= -3dBm
P
LO
= +3dBm
P
LO
= 0dBm
60
40
50
20
30
10
0
800 1300
LO UNSELECTED RETURN LOSS
vs. LO FREQUENCY
MAX2031 toc35
LO FREQUENCY (MHz)
LO UNSELECTED RETURN LOSS (dB)
1000900 1100 1200
P
LO
= -3dBm, 0dBm, +3dBm
100
90
80
70
60
-40 10-15 35 60 85
SUPPLY CURRENT
vs.TEMPERATURE (T
C
)
MAX2031 toc36
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
V
CC
= 5.0V
V
CC
= 4.75V
V
CC
= 5.25V
Downconverter Curves
30
40
35
50
45
55
60
800 900850 950 1000
RF-TO-IF ISOLATION
vs. RF FREQUENCY
MAX2031 toc28
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
T
C
= -40°C, -25°C
T
C
= +85°C
T
C
= +25°C
30
40
35
50
45
55
60
800 900850 950 1000
RF-TO-IF ISOLATION
vs. RF FREQUENCY
MAX2031 toc29
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
P
LO
= -3dBm
P
LO
= 0dBm
P
LO
= +3dBm
30
40
35
50
45
55
60
800 900850 950 1000
RF-TO-IF ISOLATION
vs. RF FREQUENCY
MAX2031 toc30
RF FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
V
CC
= 4.75V, 5.0V, 5.25V
Typical Operating Characteristics (continued)
(
Typical Application Circuit
, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used,
V
CC
= 5.0V, P
LO
= 0dBm, P
RF
= 0dBm, f
LO
> f
RF
, f
IF
= 160MHz, T
C
= +25°C, unless otherwise noted.)