Datasheet

MAX2690
Low-Noise, 2.5GHz
Downconverter Mixer
_______________________________________________________________________________________ 5
4.0
5.0
4.5
6.0
5.5
7.0
6.5
7.5
8.5
8.0
9.0
900 1300 1700 2100 2500
IIP3 vs.
RF FREQUENCY AND TEMPERATURE
MAX2690toc10
RF FREQUENCY (MHz)
INPUT THIRD-ORDER INTERCEPT (dBm)
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
f
RF2
= 1MHz ABOVE f
RF
0
4
2
10
8
6
16
14
12
18
0
1.0
0.5
2.5
2.0
1.5
4.0
3.5
3.0
4.5
1 250125 375 500
SINGLE-ENDED IF PORT EQUIVALENT
SHUNT RC NETWORK
MAX2690toc11
FREQUENCY (MHz)
RESISTANCE (kΩ)
CAPACITANCE (pF)
CAPACITANCE
RESISTANCE
-100
-80
-90
-70
-40
-30
-50
OUTPUT POWER (dBm)
-60
-20
0 0.6 0.9 1.2 1.50.3 1.8 2.1 2.4 2.7 3.0
IF PORT OUTPUT SPECTRUM
MAX2690toc12
FREQUENCY (GHz)
f
RF
= 900MHz
IF = 200MHz
LO = 1.1GHz
2LO
3LO - RF
2LO - RF
LO + RF
RF
-8
-6
-7
-4
-5
-3
-2
500 15001000 2000 2500 3000
INPUT 1dB COMPRESSION vs.
RF FREQUENCY AND TEMPERATURE
MAX2690toc13
RF FREQUENCY (MHz)
INPUT 1dB COMPRESSION (dBm)
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
900
1950
2450
f
RF
(MHz)
f
IF
(MHz)
200
200
350
0
2
1
4
3
6
5
7
9
8
10
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
CONVERSION GAIN
vs. SUPPLY VOLTAGE
MAX2690toc14
V
CC
(V)
CONVERSION GAIN (dB)
f
RF
= 900MHz, f
IF
= 200MHz
f
RF
= 1.95GHz, f
IF
= 200MHz
f
RF
= 2.95GHz, f
IF
= 350MHz
0
2
1
4
3
6
5
7
9
8
10
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
INPUT IP3 vs. SUPPLY VOLTAGE
MAX2690toc15
V
CC
(V)
INPUT IP3 (dBm)
f
RF
= 900MHz, f
IF
= 200MHz
f
RF
= 2450MHz, f
IF
= 350MHz
f
RF
= 1950MHz, f
IF
= 200MHz
0
2
1
5
4
3
8
7
6
9
-40 0 20-20 40 60 80 100
CONVERSION GAIN
vs. TEMPERATURE
MAX2690toc16
TEMPERATURE (°C)
CONVERSION GAIN (dB)
f
RF
= 900MHz, f
IF
= 200MHz
f
RF
= 1950MHz, f
IF
= 200MHz
f
RF
= 2450MHz, f
IF
= 350MHz
____________________________Typical Operating Characteristics (continued)
(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.)