VCA2616, VCA2611

6

SBOS234E

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The input to the preamp (LNP) is single-ended, and the output from the VCA is single-ended unless otherwise noted. This results in a 6dB reduction in signal

amplitude compared to differential operation.

INPUT-REFERRED NOISE vs VCA

CNTL

(LNP = 25dB)

VCA

0.2

1.0 1.2

0.4 0.6 0.8

1.8 2.0

1.4 1.6

2.2 2.4 2.6 2.8 3.0

24

22

20

18

16

14

12

10

8

6

4

2

0

MGS = 011

MGS = 111

R

INPUT-REFERRED NOISE vs R

S

(LNP = 25dB)

R

1

10

100

1k

10.0

1.0

0.1

MGS = 111

NOISE FIGURE vs R

S

(LNP = 25dB)

R

10

100

1k

9

8

7

6

5

4

3

2

1

0

MGS = 111

30

28

26

24

22

20

18

16

14

12

10

8

6

4

2

0

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0

VCA

NOISE FIGURE vs VCA

CNTL

(LNP = 25dB)

MGS = 111

DISTORTION vs FREQUENCY

MGS = 000

2V

Frequency (Hz)

100k

1M

10M

–30

–35

–40

–45

–50

–55

–60

–65

–70

–75

–80

–85

V

V

V

V

DISTORTION vs FREQUENCY

MGS = 011

2V

Frequency (Hz)

100k

1M

10M

–30

–35

–40

–45

–50

–55

–60

–65

–70

–75

–80

–85

–90

V

V

V

V