Rainbow Electronics MAX19998 - Manual (Page 8)

SiGe, High-Linearity, 2300MHz to 4000MHz
Downconversion Mixer with LO Buffer
MAX19998
8 ______________________________________________________________________________________
Typical Operating Characteristics
(Typical Application Circuit with tuning elements outlined in Table 1, V
CC = 5.0V, 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 toc01
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
3800 3600 3400 3200
7
8
9
10
11
6
3000 4000
T C = +85°C
T C = +25°C
T C = -40°C
CONVERSION GAIN vs. RF FREQUENCY
MAX19998 toc02
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
3800 3600 3400 3200
7
8
9
10
11
6
3000 4000
P LO = -3dBm, 0dBm, +3dBm
CONVERSION GAIN vs. RF FREQUENCY
MAX19998 toc03
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
3800 3600 3400 3200
7
8
9
10
11
6
3000 4000
V CC = 4.75V, 5.0V, 5.25V
INPUT IP3 vs. RF FREQUENCY
MAX19998 toc04
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
3800 3600 3400 3200
24
25
26
23
3000 4000
T C = -40°C
T C = +85°C
T C = +25°C
P RF = -5dBm/TONE
INPUT IP3 vs. RF FREQUENCY
MAX19998 toc05
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
3800 3600 3400 3200
24
25
26
23
3000 4000
P LO = -3dBm, 0dBm, +3dBm
P RF = -5dBm/TONE
INPUT IP3 vs. RF FREQUENCY
MAX19998 toc06
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
3800 3600 3400 3200
24
25
26
23
3000 4000
P RF = -5dBm/TONE
V CC = 5.0V
V CC = 4.75V
V CC = 5.25V
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19998 toc07
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
3800 3600 3400 3200
60
70
80
90
50
3000 4000
P RF = -5dBm
T C = -40°C
T C = +25°C
T C = +85°C
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19998 toc08
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
3800 3600 3400 3200
60
70
80
90
50
3000 4000
P RF = -5dBm
P LO = 0dBm
P LO = -3dBm
P LO = +3dBm
2RF - 2LO RESPONSE
vs. RF FREQUENCY
MAX19998 toc09
RF FREQUENCY (MHz)
2RF - 2LO RESPONSE (dBc)
3800 3600 3400 3200
60
70
80
90
50
3000 4000
P RF = -5dBm
V CC = 4.75V, 5.0V, 5.25V