VCA822IDGS datasheet(9/35 Pages) TI

Part #	VCA822IDGS

Description	Wideband, > 40dB Gain Adjust Range, Linear in V/V VARIABLE GAIN AMPLIFIER

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2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

-0.2

GainControlVoltage(V)

-1.2

-0.8

-0.4

0

0.4

0.8

1.2

3

0

-3

-6

-9

-12

Frequency(Hz)

1M

10M

100M

1G

V

+10mV

G

DC

PP

IN

DC

=0V

V

=0.5V

1.5

1.0

0.5

0

-0.5

-1.0

Time(10ns/div)

4

3

2

1

0

-1

V

=1.25V

IN

DC

10

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

Frequency(Hz)

1M

10M

100M

1G

V

=2V

O

PP

V

=

1V

-

G

V

=1V

G

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

GainControlVoltage(V)

-1.0 -0.8 -0.6 -0.4 -0.2

0

0.2

0.4

0.6

0.8

1.0

10MHz

20MHz

1MHz

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

Frequency(MHz)

0

20

40

60

80

100

V

=+1V

V

=1V

G

O

PP

VCA822

SBOS343A – SEPTEMBER 2007 – REVISED OCTOBER 2007

TYPICAL CHARACTERISTICS: VS = ±5V, AVMAX = +2V/V (continued)

At TA = +25°C, RL = 100Ω, RF = 1.33kΩ, RG = 1.33kΩ, VG = +1V, VIN = single-ended input on +VIN with –VIN at ground, and

SO-14 package, unless otherwise noted.

GAIN vs GAIN CONTROL VOLTAGE

GAIN CONTROL FREQUENCY RESPONSE

Figure 26.

Figure 27.

GAIN CONTROL PULSE RESPONSE

FULLY-ATTENUATED RESPONSE

Figure 28.

Figure 29.

GROUP DELAY vs GAIN CONTROL VOLTAGE

GROUP DELAY vs FREQUENCY

Figure 30.

Figure 31.

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