3.5GHz Downconverter Mixers
with Selectable LO Doubler
Typical Operating Characteristics (continued)
(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
CONVERSION GAIN vs. LO POWER
CONVERSION GAIN vs. LO POWER
NOISE FIGURE vs. LO POWER
(ENX2 = GND)
(ENX2 = V )
CC
10
10
8
30
25
20
15
10
5
T
= -40°C
T = -40°C
A
A
8
6
6
4
4
T
= +25°C
A
T
= +25°C
A
2
2
0
0
-2
-4
-6
-8
-10
-2
-4
-6
-8
-10
T
= +85°C
A
T
= +85°C
A
0
-20
-15
-10
LO POWER (dBm)
-5
0
-20
-15
-10
-5
0
-16 -14 -12 -10 -8 -6 -4 -2
LO POWER (dBm)
0
LO POWER (dBm)
CONVERSION GAIN vs. SUPPLY VOLTAGE
(R = 820Ω)
CONVERSION GAIN vs. SUPPLY VOLTAGE
(R = 1.2kΩ)
CONVERSION GAIN vs. SUPPLY VOLTAGE
(R = 2kΩ)
BIAS
BIAS
BIAS
10
9
8
7
6
5
4
3
2
1
0
10
9
8
7
6
5
4
3
2
1
0
10
9
8
7
6
5
4
3
2
1
0
T
= -40°C
A
T
= -40°C
A
T
= -40°C
A
T
= +25°C
A
T
= +85°C
A
T
T
= +25°C
= +85°C
A
A
T
= +25°C
A
T
= +85°C
A
ENX2 = V
CC
ENX2 = GND
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
INPUT IP3 vs. SUPPLY VOLTAGE
(R = 1.2kΩ)
INPUT IP3 vs. SUPPLY VOLTAGE
INPUT IP3 vs. SUPPLY VOLTAGE
(R = 820Ω)
(R
= 2kΩ)
BIAS
BIAS
BIAS
15
12
9
10
9
10
9
T
= +85°C
A
T
= +25°C
A
8
8
T
= +25°C
A
T
= -40°C
A
T
= +85°C
A
6
7
7
T
= -40°C
A
T
= -40°C
A
T
= +85°C
3
A
6
6
T
= +25°C
A
0
5
5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5