Typical operating characteristics (continued) – Rainbow Electronics MAX19998 User Manual
Page 12
SiGe, High-Linearity, 2300MHz to 4000MHz
Downconversion Mixer with LO Buffer
MAX19998
12 _____________________________________________________________________________________
Typical Operating Characteristics (continued)
(Typical Application Circuit with tuning elements outlined in Table 1, V
CC
= 3.3V, f
RF
= 3100MHz to 3900MHz, LO is low-side injected
for a 300MHz IF, P
RF
= -5dBm, P
LO
= 0dBm, T
C
= +25NC, unless otherwise noted.)
CONVERSION GAIN vs. RF FREQUENCY
MAX19998 toc35
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
3800
3600
3400
3200
7
8
9
10
6
3000
4000
T
C
= -40NC
T
C
= +25NC
T
C
= +85NC
V
CC
= 3.3V
CONVERSION GAIN vs. RF FREQUENCY
MAX19998 toc36
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
3800
3600
3400
3200
7
8
9
10
6
3000
4000
P
LO
= -3dBm, 0dBm, +3dBm
V
CC
= 3.3V
CONVERSION GAIN vs. RF FREQUENCY
MAX19998 toc37
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
3800
3600
3400
3200
7
8
9
10
6
3000
4000
V
CC
= 3.0V, 3.3V, 3.6V
INPUT IP3 vs. RF FREQUENCY
MAX19998 toc38
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
3800
3600
3400
3200
19
20
21
22
18
3000
4000
T
C
= +85NC
T
C
= +25NC
T
C
= -40NC
V
CC
= 3.3V
P
RF
= -5dBm/TONE
INPUT IP3 vs. RF FREQUENCY
MAX19998 toc39
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
3800
3600
3400
3200
19
20
21
22
18
3000
4000
P
LO
= -3dBm, 0dBm, +3dBm
V
CC
= 3.3V
P
RF
= -5dBm/TONE
INPUT IP3 vs. RF FREQUENCY
MAX19998 toc40
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
3800
3600
3400
3200
19
20
21
22
18
3000
4000
V
CC
= 3.6V
V
CC
= 3.3V
P
RF
= -5dBm/TONE
V
CC
= 3.0V
2RF - 2LO RESPONSE
vs. RF FREQUENCY
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
50
60
70
80
90
40
MAX19998 toc41
3800
3600
3400
3200
3000
4000
V
CC
= 3.3V
P
RF
= -5dBm
T
C
= +85NC
T
C
= -40NC
T
C
= +25NC
2RF - 2LO RESPONSE
vs. RF FREQUENCY
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
50
60
70
80
90
40
MAX19998 toc42
3800
3600
3400
3200
3000
4000
V
CC
= 3.3V
P
RF
= -5dBm
P
LO
= +3dBm
P
LO
= 0dBm
P
LO
= -3dBm
2RF - 2LO RESPONSE
vs. RF FREQUENCY
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
50
60
70
80
90
40
MAX19998 toc43
3800
3600
3400
3200
3000
4000
P
RF
= -5dBm
V
CC
= 3.0V, 3.3V, 3.6V