Manual

SiGe, High-Linearity, 2300MHz to 4000MHz
Downconversion Mixer with LO Buffer
MAX19998
______________________________________________________________________________________ 17
Typical Operating Characteristics (continued)
(Typical Application Circuit with tuning elements outlined in Table 1, V
CC
= 5.0V, f
RF
= 3100MHz to 3900MHz, LO is high-side injected
for a 300MHz IF, P
RF
= -5dBm, P
LO
= 0dBm, T
C
= +25NC, unless otherwise noted.)
3LO - 3RF RESPONSE
vs. RF FREQUENCY
MAX19998 toc78
RF FREQUENCY (MHz)
3LO - 3RF RESPONSE (dBc)
3800360034003200
65
75
85
95
55
3000 4000
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
P
RF
= -5dBm
3LO - 3RF RESPONSE
vs. RF FREQUENCY
MAX19998 toc79
RF FREQUENCY (MHz)
3LO - 3RF RESPONSE (dBc)
3800360034003200
65
75
85
95
55
3000 4000
P
RF
= -5dBm
P
LO
= -3dBm, 0dBm, +3dBm
3LO - 3RF RESPONSE
vs. RF FREQUENCY
MAX19998 toc80
RF FREQUENCY (MHz)
3LO - 3RF RESPONSE (dBc)
3800360034003200
65
75
85
95
55
3000 4000
P
RF
= -5dBm
V
CC
= 4.75V, 5.0V, 5.25V
NOISE FIGURE vs. RF FREQUENCY
MAX19998 toc81
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
352533503175
8
9
10
11
12
7
3000 3700
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
NOISE FIGURE vs. RF FREQUENCY
MAX19998 toc82
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
352533503175
8
9
10
11
12
7
3000 3700
P
LO
= -3dBm, 0dBm, +3dBm
NOISE FIGURE vs. RF FREQUENCY
MAX19998 toc83
RF FREQUENCY (MHz)
NOISE FIGURE (dB)
352533503175
8
9
10
11
12
7
3000 3700
V
CC
= 4.75V, 5.0V, 5.25V
INPUT P
1dB
vs. RF FREQUENCY
MAX19998 toc84
RF FREQUENCY (MHz)
INPUT P
1dB
(dBm)
3800360034003200
10
11
12
13
9
3000 4000
T
C
= -40°C
T
C
= +25°C
T
C
= +85°C
INPUT P
1dB
vs. RF FREQUENCY
MAX19998 toc85
RF FREQUENCY (MHz)
INPUT P
1dB
(dBm)
3800360034003200
10
11
12
13
9
3000 4000
P
LO
= -3dBm, 0dBm, +3dBm
INPUT P
1dB
vs. RF FREQUENCY
MAX19998 toc86
RF FREQUENCY (MHz)
INPUT P
1dB
(dBm)
3800360034003200
10
11
12
13
9
3000 4000
V
CC
= 4.75V
V
CC
= 5.0V
V
CC
= 5.25V