VCA820IDGSR datasheet(10/37 Pages) TI

Part #	VCA820IDGSR

Description	Wideband, 40dB Adjust Range, Linear in dB VARIABLE GAIN AMPLIFIER

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100

10

0

CapacitiveLoad(pF)

1

10

1k

100

0.1dBFlatnessTargeted

9

6

-12

Frequency(Hz)

1M

10M

1G

100M

3

0

-9

-6

-3

R

F

+V

IN

-VIN

1.33kW

1kW

(1)

20W

V

IN

V

OUT

R

S

VCA820

NOTE:(1)1k

isoptional.

W

C =100pF

L

C =47pF

L

C =10pF

L

C =22pF

L

V =0.5V

O

PP

1000

100

10

Frequency(Hz)

100

1k

10k

10M

100k

1M

V =+1V

G

V =+2V

G

V =0V

G

10

1

Frequency(Hz)

100

1k

10k

10M

100k

1M

VCA820

SBOS395C – OCTOBER 2007 – REVISED OCTOBER 2009............................................................................................................................................ www.ti.com

TYPICAL CHARACTERISTICS: VS = ±5V, AVMAX = 6dB (continued)

At TA = +25°C, RL = 100Ω, RF = 1.33kΩ, RG = 1.33kΩ, VG = +2V, VIN = single-ended input on +VIN with –VIN at ground, and

SO-14 package, unless otherwise noted.

RECOMMENDED RS vs CAPACITIVE LOAD

FREQUENCY RESPONSE vs CAPACITIVE LOAD

Figure 31.

Figure 32.

OUTPUT VOLTAGE NOISE DENSITY

INPUT CURRENT NOISE DENSITY

Figure 33.

Figure 34.

10

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VCA820IDGSR Datasheet(PDF) 10 Page - Texas Instruments

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