MAX496CSE データシートの表示（PDF） - Maxim Integrated

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MAX496CSE

375MHz Quad Closed-Loop Video Buffers, AV = +1 and +2

Maxim Integrated 

375MHz Quad Closed-Loop

Video Buffers, AV = +1 and +2

_____________________Pin Description

PIN NAME

1, 3,

5, 7

GND

2

IN0

4

IN1

6

IN2

8

IN3

9, 15

VCC

10

OUT3

11, 13

VEE

12

OUT2

14

OUT1

16

OUT0

FUNCTION

Ground. All ground pins are internally

connected. Connect all ground pins

externally to minimize the ground

impedance.

Channel 0 Input

Channel 1 Input

Channel 2 Input

Channel 3 Input

Positive Power Supply. Connect to +5V.

VCC pins are internally connected.

Connect both pins to +5V externally to

minimize the supply impedance.

Channel 3 Output

Negative power supply. Connect to -5V.

VEE pins are internally connected.

Connect both pins to -5V externally to

minimize the supply impedance.

Channel 2 Output

Channel 1 Output

Channel 0 Output

_______________Detailed Description

The MAX496/MAX497 are quad, high-speed, closed-loop

voltage-feedback video amplifiers with fixed gain settings

of +1 and +2, respectively (Figure 1). These amplifiers

use a unique two-stage voltage-feedback architecture

that combines the benefits of conventional voltage-feed-

back and current-mode-feedback topologies. They

achieve wide bandwidths and high slew rates while main-

taining precision. A resistively loaded first stage provides

low input-referred noise even with low supply currents of

8mA per amplifier. The above features, along with the

ability to drive 50Ω or 75Ω back-terminated cables to

±2.8V and low differential phase and gain errors, make

these amplifiers ideal for the most demanding component

and composite video applications.

__________Applications Information

The feedback elements of the MAX496/MAX497 are

included internally in the device to set the closed-loop

gain to AV = +1 and AV = +2, respectively. Closing the

loop internally on the chip minimizes problems associ-

ated with the board and package parasitics influencing

the amplifier’s frequency response.

VCC

+5V

0.10µF

10µF

0.10µF

9 15

75Ω

75Ω CABLE

RED

75Ω

2 IN0

75Ω

GREEN

75Ω CABLE

75Ω

4 IN1

AV = *

11 13

0.10µF

0.10µF

10µF

VEE

-5V

OUT0 16

75Ω

75Ω CABLE

75Ω

MAX496*

MAX497*

OUT1 14

75Ω

75Ω CABLE

75Ω

75Ω

BLUE

75Ω CABLE

75Ω

6 IN2

AV = *

OUT2 12

75Ω

75Ω CABLE

75Ω

75Ω

SYNC

75Ω CABLE

75Ω

*AV = +1 (MAX496)

*AV = +2 (MAX497)

Figure 1. Typical Operating Circuit

8 IN3

AV = *

OUT3 10

75Ω

75Ω CABLE

75Ω

GND

3

57

8 _______________________________________________________________________________________

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