MAX2683/MAX2684
3.5GHz Downconverter Mixers
with Selectable LO Doubler
4 _______________________________________________________________________________________
Typical Operating Characteristics
(MAX2683/MAX2684 EV kit, V
CC
= +5V, R
BIAS
= 1.2kΩ, ENX2 = GND, f
RF
= 3.6GHz, P
RF
= -20dBm, f
LOX2
= 1650MHz for MAX2683 or
f
LOX2
= 1350MHz for MAX2684, P
LO
= -5dBm, all input/output ports terminated in 50Ω, IFOUT+ and IFOUT- matched to single-ended
50Ω load, T
A
= +25°C, unless otherwise noted.)
0
30
20
10
40
50
60
70
80
90
100
2.5 3.53.0 4.0 4.5 5.0 5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(ENX2 = GND)
MAX2683/4 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= -40°C
R
BIAS
= 820Ω
R
BIAS
= 1.2kΩ
R
BIAS
= 2.0kΩ
T
A
= +25°C
T
A
= +85°C
0
30
20
10
40
50
60
70
80
90
100
2.5 3.53.0 4.0 4.5 5.0 5.5
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(ENX2 = V
CC
)
MAX2683/4 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +85°C
T
A
= +25°C
R
BIAS
= 820Ω
R
BIAS
= 1.2kΩ
R
BIAS
= 2.0kΩ
T
A
= -40°C
20
35
30
25
40
45
50
55
60
65
70
800 12001000 1400 1600 1800 2000
SUPPLY CURRENT vs. R
BIAS
MAX2683/4 toc03
R
BIAS
(Ω)
SUPPLY CURRENT (mA)
V
CC
= +5V
V
CC
= +5V
V
CC
= +3.3V
V
CC
= +3.3V
ENX2 = V
CC
ENX2 = GND
5.0
5.5
6.5
6.0
7.0
7.5
800 12001000 1400 1600 1800 2000
CONVERSION GAIN vs. R
BIAS
MAX2683 toc04
R
BIAS
(Ω)
CONVERSION GAIN (dB)
V
CC
= +5V
V
CC
= +3.3V
5
7
6
9
8
10
11
800 1200 14001000 1600 1800 2000
INPUT IP3 vs. R
BIAS
MAX2683/4 toc05
R
BIAS
(Ω)
INPUT IP3 (dBm)
V
CC
= +5V
V
CC
= +3.3V
-3
-1
-2
1
0
2
3
800 1200 14001000 1600 1800 2000
INPUT P1dB vs. R
BIAS
MAX2683 toc06
R
BIAS
(Ω)
INPUT P1dB (dBm)
V
CC
= +5V
V
CC
= +3.3V
MAX2683
Note 4: Conversion gain does not include output balun losses, typically 0.3dB at 300MHz on the MAX2683 EV kit and 0.8dB at
900MHz on the MAX2684 EV kit.
Note 5: IIP3 measured with two tones at 3605MHz and 3610MHz, -20dBm per tone, f
IF
= 300MHz.
Note 6: IIP2 measured with f
RFIN
= 3450MHz, P
RFIN
= -20dBm, f
IF
= 300MHz.
Note 7: Input match optimized for best return loss at f
RF
= 3600MHz.
Note 8: Over specified RF input frequency range with matching network.
Note 9: Over specified LO input frequency range.
Note 10: IIP3 measured with two tones at 3605MHz and 3610MHz, -20dBm per tone, f
IF
= 900MHz.
Note 11: IIP2 measured with f
RFIN
= 3150MHz, P
RFIN
= -20dBm, f
IF
= 900MHz.
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