VCA821IDGST datasheet(7/37 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]

Direct Link	http://www.ti.com

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

Frequency(Hz)

1M

10M

100M

1G

2G

3

0

-3

-6

-9

-12

-15

-18

V

=+1V

G

V

=+2V

G

A

VMAX

=6dB

V

=1V

IN

PP

R =100W

L

Frequency(Hz)

1M

10M

100M

1G

2G

3

0

-3

-6

-9

-12

-15

-18

V

=1V

O

PP

V

=4V

O

PP

V

=5V

O

PP

V

=2V

O

PP

Time(10ns/div)

300

200

100

0

-100

-200

-300

V

=250mV

IN

PP

f=20MHz

Time(10ns/div)

4.0

3.0

2.0

1.0

0

-1.0

-2.0

-3.0

V

=2V

IN

PP

f=20MHz

0

-0.1

-0.2

-0.3

-0.4

-0.5

-0.6

-0.7

-0.8

-0.9

NumberofVideoLoads

0

-0.005

-0.010

-0.015

-0.020

-0.025

-0.030

-0.035

-0.040

-0.045

1

2

3

4

-dG,V =+1V

G

-dP,V =+1V

G

-dP,V =0V

G

-dG,V =0V

G

0.2

0.1

0

-0.1

-0.2

-0.3

-0.4

-0.5

Frequency(MHz)

0.15

0.10

0.05

0

-0.05

-0.10

-0.15

-0.20

0

50

100

150

200

LeftScale

RightScale

A

=6dB

VMAX

V

=+2V

G

VCA821

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

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.

SMALL-SIGNAL FREQUENCY RESPONSE

LARGE-SIGNAL FREQUENCY RESPONSE

Figure 11.

Figure 12.

SMALL-SIGNAL PULSE RESPONSE

LARGE-SIGNAL PULSE RESPONSE

Figure 13.

Figure 14.

COMPOSITE VIDEO dG/dP

GAIN FLATNESS, DEVIATION FROM LINEAR PHASE

Figure 15.

Figure 16.

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