LTC5540IUH View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC5540IUH' PDF : 16 Pages View PDF
LTC5540
Typical AC Performance Characteristics Low-Side LO
VCC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm, PRF = –3dBm (–3dBm/tone for two-tone IIP3 tests, ∆f = 2MHz),
IF = 190MHz, unless otherwise noted. Test circuit shown in Figure 1.
Conversion Gain, IIP3 and NF
vs RF Frequency
28
22
26
20
24
18
IIP3
22
16
20
14
18
12
16
10
14
12
10
8 GC
85°C
25°C
– 40°C
NF 8
6
4
2
6
0
800 900 1000 1100 1200 1300
RF FREQUENCY (MHz)
5540 G22
900MHz SSB Noise Figure
vs RF Blocker Level
24
PLO = –3dBm
22
PLO = 0dBm
PLO = +3dBm
20
PLO = +6dBm
18
16
14
12
10
8
–20
RF = 900MHz
BLOCKER = 1000MHz
–15 –10 –5 0
5 10
RF BLOCKER POWER (dBm)
5540 G23
900MHz Conversion Gain, IIP3
and RF Input P1dB vs Temperature
28
26
IIP3
24
22
20
VCCIF = 5.0V
VCCIF = 3.3V
18
16
14
12
P1dB
10
8 GC
6
–45 –25 –5 15 35 55 75 95
TEMPERATURE (°C)
5540 G24
900MHz Conversion Gain, IIP3
and NF vs LO Power
28
22
26
20
IIP3
24
18
22
16
20
14
18
12
16
10
14
12
10
8 GC
85°C
25°C
– 40°C
NF
8
6
4
2
6
0
–6 –4 –2 0
2
4
6
LO INPUT POWER (dBm)
5540 G25
2-Tone IF Output Power, IM3 and
IM5 vs RF Input Power
20
10
0
–10
IFOUT
–20
–30
RF1 = 899MHz
RF2 = 901MHz
–40 LO = 710MHz
–50
–60
IM3
–70
IM5
–80
–12 –9 –6 –3 0
3
6
RF INPUT POWER (dBm/TONE)
5540 G28
1100MHz Conversion Gain, IIP3
and NF vs LO Power
28
22
26
IIP3
20
24
18
22
16
20
14
18
12
16
10
14
12
10 GC
8
85°C
25°C
– 40°C
NF
8
6
4
2
6
0
–6 –4 –2 0
2
4
6
LO INPUT POWER (dBm)
5540 G26
Single-Tone IF Output Power, 2 × 2
and 3 × 3 Spurs vs RF Input Power
20
10 IFOUT
RF = 900MHz
0
–10
–20
–30 LO = 710MHz
–40
3RF–3LO
RF = 733.33MHz
–50
2RF–2LO
–60
RF = 805MHz
–70
–80
–12 –9 –6 –3 0
3
6
RF INPUT POWER (dBm)
5540 G29
1300MHz Conversion Gain, IIP3
and NF vs LO Power
28
22
26
IIP3
20
24
18
22
16
20
14
18
12
16
10
14
12
10 GC
8
85°C
25°C
– 40°C
NF
8
6
4
2
6
0
–6 –4 –2 0
2
4
6
LO INPUT POWER (dBm)
5540 G27
2 × 2 and 3 × 3 Spur Suppression
vs LO Power
–50
–55
2RF–2LO
RF = 805MHz
RF = 900MHz
PRF = –10dBM
LO = 710MHz
–60
–65
3RF–3LO
–70 RF = 773.33MHz
–75
–80
–6
–3
0
3
LO INPUT POWER (dBm)
6
5540 G30
5540f
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