Instruction Manual
MAX19995
Dual, SiGe, High-Linearity, 1700MHz to 2200MHz
Downconversion Mixer with LO Buffer/Switch
12 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(
Typical Application Circuit
, optimized for the DCS/PCS band, R1 = R4 = 806Ω, R2 = R5 = 2.32kΩ, V
CC
= +5.0V, P
LO
= 0dBm,
P
RF
= -5dBm, LO is low-side injected for a 190MHz IF, T
C
= +25°C, unless otherwise noted.)
RF PORT RETURN LOSS
vs. RF FREQUENCY
MAX19995 toc37
RF FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
23001900 2100
20
25
10
15
5
0
30
1700 2500
P
LO
= -3dBm, 0dBm, +3dBm
f
IF
= 190MHz
IF PORT RETURN LOSS
vs. IF FREQUENCY
MAX19995 toc38
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
410140 230 320
15
10
5
0
20
50 500
f
LO
= 1610MHz
V
CC
= 4.75V, 5.0V, 5.25V
LO SELECTED RETURN LOSS
vs. LO FREQUENCY
MAX19995 toc39
LO FREQUENCY (MHz)
LO SELECTED RETURN LOSS (dB)
22001600 1800 2000
15
10
5
0
30
25
20
1400 2400
P
LO
= -3dBm
P
LO
= 0dBm
P
LO
= +3dBm
LO UNSELECTED RETURN LOSS
vs. LO FREQUENCY
MAX19995 toc40
LO FREQUENCY (MHz)
LO UN SELECTED RETURN LOSS (dB)
2200 24001600 1800 2000
15
10
5
0
30
25
20
1400
P
LO
= -3dBm, 0dBm, +3dBm
SUPPLY CURRENT
vs. TEMPERATURE (T
C
)
MAX19995 toc41
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
65 85-15 5 25 45
300
320
340
260
280
-35
V
CC
= 5.25V
V
CC
= 4.75V
V
CC
= 5.0V
CONVERSION GAIN vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
MAX19995 toc42
RF FREQUENCY (MHz)
CONVERSION GAIN (dB)
25001900 2100 2300
9
8
10
11
6
7
1700
0
Ω
, 3.6nH, 6.8nH, 10nH
INPUT IP3 vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
MAX19995 toc43
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
25001900 2100 2300
23
22
24
25
20
21
1700
0
Ω
6.8nH
10nH
3.6nH
P
RF
= -5dBm/TONE
2RF-2LO RESPONSE vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
MAX19995 toc44
RF FREQUENCY (MHz)
2RF-2LO RESPONSE (dBc)
25001900 2100 2300
70
80
90
50
60
1700
0
Ω
6.8nH, 10nH
3.6nH
P
RF
= -5dBm
3RF-3LO RESPONSE vs. RF FREQUENCY
(VARIOUS VALUES OF L3 AND L6)
MAX19995 toc45
RF FREQUENCY (MHz)
3RF-3LO RESPONSE (dBc)
25001900 2100 2300
75
85
95
55
65
1700
0
Ω
10nH
6.8nH
3.6nH
P
RF
= -5dBm