VCA2612Y datasheet(7/19 Pages) BURR-BROWN

Part #	VCA2612Y

Description	TMDual, VARIABLE GAIN AMPLIFIER with Low Noise Preamp

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Manufacturer	BURR-BROWN [Burr-Brown (TI)]

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7

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VCA2612

TYPICAL PERFORMANCE CURVES (Cont.)

At TA = +25°C, VDD = 5V, load resistance = 500Ω on each output to ground, MGS = 011, LNP = 22dB and fIN = 5MHz, unless otherwise noted. The input to the

preamp (LNP) is single-ended, and the output from the VCA is single-ended unless otherwise noted.

INPUT REFERRED NOISE vs R

S

R

S (Ω)

1

10

100

1000

10.0

1.0

0.1

NOISE FIGURE vs R

S

(VCA

CNTL = 3.0V)

R

S (Ω)

10

100

1000

11

10

9

8

7

6

5

4

3

2

1

0

NOISE FIGURE vs VCA

CNTL

VCA

CNTL (V)

30

25

20

15

10

5

0

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

INPUT REFERRED NOISE vs VCA

CNTL

VCA

CNTL (V)

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

S= 50Ω

LNP vs FREQUENCY

(Differential, 2Vp-p)

Frequency (MHz)

0.1

1

10

100

–45

–50

–55

–60

–65

–70

–75

–80

3rd Harmonic

2nd Harmonic

LNP vs FREQUENCY

(Single-Ended, 1Vp-p)

Frequency (MHz)

0.1

1

10

100

–45

–50

–55

–60

–65

–70

–75

–80

2nd Harmonic

3rd Harmonic

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