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MAX2690
Low-Noise, 2.5GHz
Downconverter Mixer
4 _______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(MAX2690 EV kit, V
CC
= +3.0V, P
LO
= -3dBm, P
RF
= -25dBm, f
RF
= 1.95GHz, f
IF
= 200MHz, SHDN = high, T
A
= +25°C, unless
otherwise noted.)
5
9
7
13
11
17
15
19
23
21
25
2.7 3.3 3.6 3.93.0 4.2 4.5 4.8 5.45.1 5.7
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2690toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
0
0.4
0.2
0.6
1.2
1.4
1.0
0.8
1.6
2.7 3.3 3.6 3.9 4.23.0 4.5 4.8 5.1 5.4 5.7
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2690toc02
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (µA)
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
SHDN = 0V
4.0
4.6
4.4
4.2
4.8
5.0
5.2
5.4
5.6
5.8
6.0
50 150100 200 250 300 350
CONVERSION GAIN
vs. IF FREQUENCY
MAX2690toc03
IF FREQUENCY (MHz)
CONVERSION GAIN (dB)
f
RF
= 2.45GHz
-6
-4
-2
0
2
4
6
8
10
0 1000500 1500 2000 2500 3000
CONVERSION GAIN
vs. RF FREQUENCY
MAX2690toc04
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
f
IF
= 200MHz
f
IF
= 200MHz
f
IF
= 350MHz
-6
-2
-4
0
6
8
4
2
10
-15 -11 -9 -7 -5-13 -3 -1 1 3 5
CONVERSION GAIN
vs. LO POWER
MAX2690toc07
LO POWER (dBm)
GAIN (dB)
f
RF
= 900MHz, f
IF
= 200MHz
f
RF
= 1950MHz, f
IF
= 200MHz
f
RF
= 2450MHz, f
IF
= 350MHz
0
4
2
8
6
12
10
14
500 15001000 2000 2500 3000
NOISE FIGURE
vs. RF FREQUENCY AND TEMPERATURE
MAX2690toc05
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
900
1950
2450
f
RF
(MHz)
f
IF
(MHz)
200
200
350
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
40
20
80
60
120
100
140
-350
-250
-300
-150
-200
-50
-100
0
500 1000 1500 2000 2500
RF PORT IMPEDANCE
vs. FREQUENCY
MAX2690toc06
FREQUENCY (MHz)
REAL IMPEDANCE (Ω)
IMAGINARY IMPEDANCE (Ω)
IMAGINARY
REAL
0
4
2
8
6
12
10
14
0 12 27 47
GAIN AND LINEARITY
vs. LGND INDUCTOR VALUE
MAX2690toc08
LGND INDUCTOR VALUE (nH)
GAIN AND LINEARITY (dB or dBm)
f
RF
= 1.95GHz
GAIN
IIP3
OIP3