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LTC5566 Datasheet(PDF) 21 Page - Linear Technology

Part # LTC5566
Description  300MHz to 6GHz Dual Programmable Gain Downconverting Mixer
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC5566 Datasheet(HTML) 21 Page - Linear Technology

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LTC5566
21
5566f
For more information www.linear.com/LTC5566
applicaTions inForMaTion
Downconverter Performance vs IF Attenuation
RF-IF conversion gain, IIP3, OIP3 and noise figure over
the full 15.5dB attenuation range is shown in Figure 12.
The same data is listed in Table 4 with the INL and DNL
at each attenuator setting.
Table 4. Conversion Gain, IIP3, OIP3 and SSB NF vs IF
Attenuation (RF = 2.6GHz, IF = 153MHz, High Side LO)
A
(dB)
IF1[4:0]
IF2[4:0]
GC
(dB)
IIP3
(dBm)
OIP3
(dBm)
NF
(dB)
DNL
(dB)
INL
(dB)
0
0
11.84
23.2
35.0
13.3
—
—
0.5
1
11.32
23.3
34.6
13.4
0.03
0.03
1.0
2
10.75
23.4
34.2
13.6
0.07
0.09
1.5
3
10.24
23.6
33.8
13.7
0.01
0.10
2.0
4
9.75
24.0
33.8
13.8
–0.01
0.09
2.5
5
9.24
24.2
33.5
13.9
0.01
0.10
3.0
6
8.75
24.6
33.4
14.1
–0.01
0.09
3.5
7
8.24
24.9
33.2
14.2
0.01
0.11
4.0
8
7.75
25.1
32.8
14.4
–0.01
0.10
4.5
9
7.24
25.5
32.8
14.6
0.01
0.11
5.0
10
6.75
25.7
32.4
14.8
–0.01
0.10
5.5
11
6.23
25.9
32.1
15.0
0.01
0.11
6.0
12
5.75
26.1
31.8
15.3
–0.01
0.10
6.5
13
5.23
26.5
31.7
15.5
0.01
0.11
7.0
14
4.74
26.4
31.1
15.7
–0.01
0.10
7.5
15
4.22
26.9
31.1
15.9
0.03
0.13
8.0
16
3.73
26.7
30.4
16.2
–0.02
0.11
8.5
17
3.21
27.1
30.4
16.5
0.02
0.14
9.0
18
2.73
26.9
29.6
16.9
–0.02
0.12
9.5
19
2.20
27.4
29.6
17.2
0.03
0.14
10.0
20
1.72
27.1
28.8
17.5
–0.02
0.13
10.5
21
1.20
27.6
28.8
17.8
0.02
0.15
11.0
22
0.71
27.3
28.0
18.2
–0.01
0.14
11.5
23
0.18
27.5
27.7
18.6
0.02
0.16
12.0
24
–0.31
27.6
27.3
19.0
–0.01
0.15
12.5
25
–0.84
27.8
27.0
19.4
0.03
0.18
13.0
26
–1.33
27.3
26.0
19.8
–0.02
0.17
13.5
27
–1.85
27.9
26.1
20.2
0.03
0.19
14.0
28
–2.35
28.0
25.7
20.7
0.00
0.19
14.5
29
–2.87
28.2
25.3
21.1
0.02
0.21
15.0
30
–3.36
28.0
24.6
21.5
0.00
0.20
15.5
31
–3.89
28.1
24.2
22.0
0.03
0.23
Individual Stage Performance
The LTC5566 is characterized, specified and production-
tested as a complete downconverter, from the RF inputs
to the final IF outputs. For some applications, it may be
preferred to insert a higher selectivity IF filter between
the mixer and IF DVGA. To help with system performance
calculations, the nominal performance of the mixer is
shown in Table 5 and the IF DVGA performance is listed
in Table 6. This information is provided for reference only
as these blocks are not production-tested independently.
Table 5. Mixer Power Conversion Gain, IIP3 and SSB NF
(RF = 2.6GHz, IF = 153MHz, High Side LO, Band 1 RF Tune)
FULL PWR MODE
REDUCED PWR MODE
GP (dB) IIP3 (dBm) NF (dB)
GP (dB) IIP3 (dBm)
NF (dB)
–0.5
28.0
12.2
–0.7
23.0
11.8
Table 6. IF DVGA Power Gain, OIP3 and SSB NF (153MHz)
IF
ATT
(dB)
FULL PWR MODE
REDUCED PWR MODE
GAIN
(dB)
OIP3
(dBm)
NF
(dB)
GAIN
(dB)
OIP3
(dBm)
NF
(dB)
0
12.0
36.4
5.7
11.8
33.2
5.6
3
9.0
35.7
9.3
8.8
33.0
9.3
6
6.0
35.7
12.3
5.8
33.1
12.3
9
3.0
35.7
15.4
2.8
32.9
15.3
12
0.0
35.4
18.4
–0.2
32.9
18.4
15
–3.0
35.0
21.4
–3.2
32.7
21.4
Figure 12. Downconverter RF-IF Conversion Gain, IIP3, OIP3
and Noise Figure vs IF Attenuation.
IF ATTENUATION (dB)
0
36
6
30
24
18
12
0
–6
10
12
14
5566 F12
16
8
6
4
2
GC
NF
OIP3
IIP3
RF = 2.6GHz
IF = 153MHz
HIGH SIDE LO
TC = 25°C
FULL POWER MODE



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