lt5521 Linear Technology Corporation, lt5521 Datasheet - Page 5

• Manufacturer Part Number: lt5521
• Description: Very High Linearity Active Mixer
• Manufacturer: Linear Technology Corporation

TYPICAL AC PERFOR A CE CHARACTERISTICS
P
frequency and V
LO
–36
–40
–42
–46
–48
–38
–44
–32
–34
–36
–38
–40
–42
–46
–44
–48
–50
1500
= –5dBm, V
–25
LO-RF Leakage vs LO Frequency
LO-RF Leakage vs LO Power
1550
–20
1600
LO FREQUENCY (MHz)
–15
CC
CC
LO POWER (dBm)
1650
10
–2
–4
= 5V, EN = 2.9V, T
= 5V.
8
6
4
0
1750
2
–10
–40 C
Low Side LO (LS) and High Side
LO (HS) Comparison: Conversion
Gain and IIP3 vs RF Frequency
1700
LS: R1 = R7 = 110
HS: R1 = R7 = 121
f
25 C
IF
85 C
–40 C
= 250MHz
G
C
–5
1750
25 C
85 C
1850
1800
0
RF
1850
OUT
5
5521 G09
5521 G06
1950
A
W U
1900
HS
(MHz)
= 25 C, unless otherwise noted. Test circuit shown in Figure 1 is tuned for 1.95GHz output
10
LS
LS
HS
2050
10
–2
4
8
6
0
2
4.6
Conversion Gain, IIP3 and Noise
Figure vs Supply Voltage
–36
–38
–42
–44
–46
–50
–34
–40
–48
5521 G13
IIP3
4.7
4.7
LO-RF Leakage vs Supply Voltage
2150
26
14
12
24
22
20
18
16
4.8
4.8
4.9
V
4.9
CC
5.0
–40 C
85 C
25 C
(V)
IIP3
NF
G
V
C
CC
5.1
5.0
(V)
5.2
5.1
85 C
25 C
–40 C
5.3
5521 G07
13.5
13.3
13.1
12.9
12.7
12.5
12.3
12.1
11.9
11.5
11.7
5.2
5.4
1700
5521 G10
30
20
15
5
0
Low Side LO (LS) and High Side
LO (HS) Comparison: Noise Figure
vs RF Frequency
25
10
LS: R1 = R7 = 110
HS: R1 = R7 = 121
f
IF
5.3
1750
= 250MHz
f
LO
1800
= 1700MHz, f
10
–4
–2
HS
LS
8
4
2
0
6
–25
1850
Conversion Gain and IIP3
vs LO Power
RF
20
19
18
17
16
15
14
13
12
11
10
OUT
–20
–20
1900 1950
Noise Figure vs LO Power
(MHz)
85 C
25 C
–40 C
–15
IF
–15
–40 C
LO POWER (dBm)
= 250MHz, f
2000 2050 2100
–10
LO POWER (dBm)
IIP3
85 C
G
–10
C
5521 G14
–5
25 C
RF
0
–5
LT5521
= 1950MHz,
5
5521 G08
0
10
5521 G11
5
25
24
23
22
21
20
18
19
5521f
5