VCA821IDGST datasheet(9/37 Pages) TI1

Part #	VCA821IDGST

Description	Ultra-Wideband, > 40dB Gain Adjust Range, Linear in dB VARIABLE GAIN AMPLIFIER

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Manufacturer	TI1 [Texas Instruments]

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GainControlVoltage(V)

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

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

Frequency(Hz)

1M

1G

3

0

-3

-6

-9

-12

10M

100M

V

=1V

+10mV

G

DC

PP

V

=0.5V

IN

DC

Time(10ns/div)

2.5

2.0

1.5

1.0

0.5

0

-0.5

4

3

2

1

0

-1

V

=1V

IN

DC

Frequency(Hz)

1M

1G

20

10

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

10M

100M

V

=+2V

G

V

=0V

G

V

=2V

O

PP

InputReferred

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

GainControlVoltage(V)

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

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

=+2V

G

V

=1V

O

PP

VCA821

www.ti.com ....................................................................................................................................... SBOS407B – DECEMBER 2007 – REVISED DECEMBER 2008

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

At TA = +25°C, RL = 100Ω, RF = 453Ω, RG = 453Ω, VG = +2V, 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 23.

Figure 24.

GAIN CONTROL PULSE RESPONSE

FULLY-ATTENUATED RESPONSE

Figure 25.

Figure 26.

GROUP DELAY vs GAIN CONTROL VOLTAGE

GROUP DELAY vs FREQUENCY

Figure 27.

Figure 28.

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