VCA824 datasheet(11/38 Pages) TI1

Part #	VCA824

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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TYPICAL CHARACTERISTICS: VS = ±5V, AVMAX = 20dB

Frequency(Hz)

1M

10M

100M

1G

3

0

-3

-6

-9

-12

-15

-18

V

=+1V

G

V

=+2V

G

A

VMAX

=20dB

V

=200mV

IN

PP

R =100

L

W

Frequency(Hz)

1M

10M

100M

1G

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

=50mV

IN

PP

f=20MHz

Time(10ns/div)

3

2

1

0

-1

-2

-3

V

=400mV

IN

PP

f=20MHz

0.1

0

-0.1

-0.2

-0.3

-0.4

-0.5

-0.6

Frequency(MHz)

0.20

0.15

0.10

0.05

0

-0.05

-0.10

-0.15

0

50

100

150

200

LeftScale

RightScale

A

=20dB

VMAX

V

=+2V

G

200

100

10

Frequency(Hz)

100

1k

100k

1M

10k

10M

V

=+2V

G

V

=0V

G

V

=+1V

G

VCA821

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

At TA = +25°C, RL = 100Ω, RF = 402Ω, RG = 80Ω, VG = +2V, and VIN = single-ended input on +VIN with –VIN at ground, unless

otherwise noted.

SMALL-SIGNAL FREQUENCY RESPONSE

LARGE-SIGNAL FREQUENCY RESPONSE

Figure 33.

Figure 34.

SMALL-SIGNAL PULSE RESPONSE

LARGE-SIGNAL PULSE RESPONSE

Figure 35.

Figure 36.

GAIN FLATNESS, DEVIATION FROM LINEAR PHASE

OUTPUT VOLTAGE NOISE DENSITY

Figure 37.

Figure 38.

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