3.5GHz Downconverter Mixers
with Selectable LO Doubler
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 = 300MHz.
IF
Note 6: IIP2 measured with f
= 3450MHz, P = -20dBm, f = 300MHz.
RFIN IF
RFIN
Note 7: Input match optimized for best return loss at f = 3600MHz.
RF
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 = 900MHz.
IF
Note 11: IIP2 measured with f
= 3150MHz, P = -20dBm, f = 900MHz.
RFIN IF
RFIN
Typical Operating Characteristics
(MAX2683/MAX2684 EV kit, V = +5V, R
= 1.2kΩ, ENX2 = GND, f = 3.6GHz, P = -20dBm, f
= 1650MHz for MAX2683 or
CC
BIAS
RF
RF
LOX2
f
= 1350MHz for MAX2684, P = -5dBm, all input/output ports terminated in 50Ω, IFOUT+ and IFOUT- matched to single-ended
LOX2
LO
50Ω load, T = +25°C, unless otherwise noted.)
A
MAX2683
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. R
(ENX2 = GND)
(ENX2 = V
)
BIAS
CC
100
70
65
60
55
50
45
40
35
30
25
20
100
90
80
70
60
50
40
30
20
10
0
90
T
= +85°C
A
80
70
60
50
40
ENX2 = GND
T
= +25°C
A
R
= 820Ω
= 1.2kΩ
BIAS
T
= +25°C
T
= +85°C
A
A
V
= +5V
CC
R
R
R
= 820Ω
= 1.2kΩ
BIAS
BIAS
V
= +5V
CC
BIAS
V
= +3.3V
CC
30
20
10
0
R
= 2.0kΩ
V
= +3.3V
BIAS
CC
T
= -40°C
A
R
= 2.0kΩ
BIAS
ENX2 = V
CC
T
= -40°C
A
2.5
3.0
3.5
4.0
4.5
5.0
5.5
800 1000 1200 1400 1600 1800 2000
(Ω)
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
R
BIAS
SUPPLY VOLTAGE (V)
INPUT P1dB vs. R
CONVERSION GAIN vs. R
INPUT IP3 vs. R
BIAS
BIAS
BIAS
3
2
7.5
7.0
6.5
6.0
5.5
5.0
11
10
9
V
= +5V
CC
V
= +3.3V
CC
V
= +5V
CC
1
V
= +5V
CC
0
8
V
= +3.3V
CC
V
= +3.3V
CC
-1
-2
-3
7
6
5
800 1000 1200 1400 1600 1800 2000
(Ω)
800 1000 1200 1400 1600 1800 2000
(Ω)
800 1000 1200 1400 1600 1800 2000
(Ω)
R
R
R
BIAS
BIAS
BIAS
4
_______________________________________________________________________________________