AN 074 Rev E

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19-November-2002

Applications Note No. 074

Silicon Discretes

Appendix B. Performance of LNB I.F. Amplifier over –40 to +85 °C Temperature Range.

Temperature Test, BGA430 + BGB540 LNB IF Amp, PCB=430-051802 Rev B, -40 to +85 C

Overall Impression:

match does deteriorate to worse than 10 dB return loss in some cases (see yellow highlights) but

this issue could be remedied with component value tuning on PCB, etc.

Summary Of Data, Stand-Alone BGA430 (e.g. single – MMIC LNB IF Amp Solution)

Temperature

Frequency

MHz

Current,

mA

-40 C

950

12.1

33.3

>40

9.8

-40 C

1450

9.4

33.5

40

8.9

22.5

-40 C

2150

8.5

29.3

40

13.0

+25 C

950

17.7

32.7

>40

10.2

+25 C

1450

19.2

32.5

>40

9.1

21.8

+25 C

2150

12.5

27.9

>40

13.2

+85 C

950

16.7

32.2

>40

11.0

+85 C

1450

17.8

31.5

>40

9.2

21.1

+85 C

2150

11.5

26.6

>40

13.3

Summary Of Data, BGA430 + BGB540 --- Complete two MMIC IF Amp

Temperature

Frequency

MHz

Current,

mA

-40 C

950

25.2

33.7

>50

13.0

-40 C

1450

14.0

37.8

>50

13.0

39.3

-40 C

2150

7.5

38.8

>50

12.0

+25 C

950

21.8

32.3

>50

13.6

+25 C

1450

29.9

36.4

>50

13.7

38.5

+25 C

2150

13.6

37.2

≈46

12.4

+85 C

950

15.3

31.1

>50

14.3

+85 C

1450

13.4

35.1

>50

15.7

37.7

+85 C

2150

12.7

35.4

>50

11.9