LTC5541IUHPBF データシートの表示（PDF） - Linear Technology
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LTC5541IUHPBF Datasheet PDF : 16 Pages
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LTC5541
TYPICAL AC PERFORMANCE CHARACTERISTICS Low-Side LO (continued)
VCC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm, PRF = –3dBm (–3dBm/tone for two-tone IIP3 tests, Δf = 2MHz),
IF = 190MHz, unless otherwise noted. Test circuit shown in Figure 1.
2-Tone IF Output Power, IM3 and
IM5 vs RF Input Power
20
10
IFOUT
0
–10
–20
RF1 = 1949MHz
RF2 = 1951MHz
LO = 1760MHz
–30
–40
–50
–60
–70 IM3
IM5
–80
–12 –9 –6 –3 0
3
6
RF INPUT POWER (dBm/TONE)
5541 G13
SSB Noise Figure
vs RF Blocker Level
17
RF = 1950MHz
16
BLOCKER = 2050MHz
15
14
PLO = –3dBm
13
PLO = 0dBm
12
11
10
9
–25
PLO = 3dBm
–20 –15 –10 –5 0
5
RF BLOCKER POWER (dBm)
5541 G16
Single-Tone IF Output Power, 2 × 2
and 3 × 3 Spurs vs RF Input Power
20
IFOUT
10 (RF = 1950MHz)
0
LO = 1760MHz
–10
–20
–30
3RF-3LO
–40 (RF = 1823.33MHz)
–50
–60
2RF-2LO
(RF = 1855MHz)
–70
–80
–12 –9 –6 –3 0 3 6 9 12 15
RF INPUT POWER (dBm)
5541 G14
LO Switch Isolation
vs LO Frequency–LO1 Selected
60
PLO2 = –3dBm
55
50
45
40
1.2
PLO2 = 0dBm
PLO2 = 3dBm
LOSEL = LOW
PLO1 = 0dBm
1.4 1.6 1.8 2.0 2.2
LO FREQUENCY (GHz)
5541 G17
2 × 2 and 3 × 3 Spur Suppression
vs LO Power
–50
RF = 1950MHz
PRF = –10dBm
–55
LO = 1760MHz
–60
2RF-2LO
(RF = 1855MHz)
–65
–70
–75
3RF-3LO
(RF = 1823.33MHz)
–80
–6
–4 –2 0
2
4
6
LO INPUT POWER (dBm)
5541 G15
LO Switch Isolation
vs LO Frequency–LO2 Selected
60
PLO1 = –3dBm
55
PLO1 = 0dBm
50
PLO1 = 3dBm
45
40
1.2
LOSEL = HIGH
PLO2 = 0dBm
1.4 1.6 1.8 2.0 2.2
LO FREQUENCY (GHz)
5541 G18
Conversion Gain Distribution
40
RF = 1950MHz
35
85°C
25°C
–40°C
30
25
20
15
10
5
0
6.9 7.1 7.3 7.5 7.7 7.9 8.1 8.3 8.5
CONVERSION GAIN (dB)
5541 G18a
6
IIP3 Distribution
20
RF = 1950MHz
18
16
85°C
25°C
–40°C
14
12
10
8
6
4
2
0
25.0 25.4 25.8 26.2 26.6 27.0 27.4
IIP3 (dBm)
5541 G18b
SSB Noise Figure Distribution
35
RF = 1950MHz
30
85°C
25°C
–40°C
25
20
15
10
5
0
8.2 8.6 9.0 9.4 9.8 10.2 10.6 11.0
SSB NOISE FIGURE (dB)
5541 G18c
5541f
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