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