Rainbow Electronics MAX19995А - Manual (Page 11)

MAX19995A
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz
Downconversion Mixer with LO Buffer/Switch
______________________________________________________________________________________ 11
RF PORT RETURN LOSS
vs. RF FREQUENCY
RF FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
2100 2200 2000 1900 1800
20
10
0
30
15
5
25
1700
MAX19995A toc3
7
P LO = -3dBm, 0dBm, +3dBm
f IF = 350MHz
IF PORT RETURN LOSS
vs. IF FREQUENCY
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
410 500 320 230 140
10
0
20
15
5
50
MAX19995A toc3
8
L = 120nH
L = 330nH
L = 470nH
L = L1, L2, L4, L5 f LO = 2300MHz
V
CC
= 4.75V, 5.0V, 5.25V
LO SELECTED RETURN LOSS
vs. LO FREQUENCY
LO FREQUENCY (MHz)
LO SELECTED RETURN LOSS (dB)
2550 2750 2350 2150 1950
20
10
0
30
15
5
25
1750
MAX19995A toc3
9
P LO = -3dBm, 0dBm, +3dBm
LO UNSELECTED RETURN LOSS
vs. LO FREQUENCY
LO FREQUENCY (MHz)
LO UNSELECTED RETURN LOSS (dB)
2550 2750 2350 2150 1950
20
10
0
30
15
5
25
1750
MAX19995A toc
4 0
P LO = -3dBm, 0dBm, +3dBm
SUPPLY CURRENT vs. TEMPERATURE (T C )
TEMPERATURE ( ° C)
SUPPLY CURRENT (mA)
65 85 25 45 5 -15
340
360
400
300
380
320
-35
MAX19995A toc41
V CC = 4.75V
V CC = 5.25V
V CC = 5.0V
CONVERSION GAIN vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
2200 2000 2100 1900 1800
8
9
11
6
10
7
1700
MAX19995A toc
4 2
0 Ω , 3.6nH, 6.8nH, 10nH
INPUT IP3 vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
2200 2000 2100 1900 1800
24
26
22
25
23
1700
MAX19995A toc
4 3
0 Ω , 3.6nH, 6.8nH, 10nH
P RF = -5dBm/TONE
2LO-2RF RESPONSE vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
RF FREQUENCY (MHz)
2LO-2RF RESPONSE (dBc)
2200 2000 2100 1900 1800
70
90
40
80
60
50
1700
MAX19995A toc
4 4
0 Ω
3.6nH 6.8nH, 10nH
P RF = -5dBm
3LO-3RF RESPONSE vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
RF FREQUENCY (MHz)
3LO-3RF RESPONSE (dBc)
2200 2000 2100 1900 1800
65
85
55
75
1700
MAX19995A toc45
0 Ω, 3.6nH, 6.8nH, 10nH
P RF = -5dBm
Typical Operating Characteristics (continued)
( Typical Application Circuit, R1 = R4 = 681Ω, R2 = R5 = 1.5kΩ, V CC = 5.0V, P RF = -5dBm, P LO = 0dBm, f RF = 1850MHz,
f LO = 2200MHz, f IF = 350MHz, T C = +25°C, unless otherwise noted.)