EL4393 查看數據表（PDF） - Intersil

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EL4393

Triple 80 MHz Video Amplifier w/Disable

Intersil 

Typical Performance Curves (Continued)

EL4393

Supply Current

vs Supply Voltage

Maximum Power Dissipation

vs Ambient Temperature—

16-Pin PDIP

Maximum Power Dissipation

vs Ambient Temperature—

16-Pin SOL

Small Signal Pulse Response

Large Signal Pulse Response

Small Signal Enable/Disable with +VE Voltage

Enable/Disable with -VE Voltage Output

Typical Application for EL4393, and

General Rules for PCB Layout

The figure shows two EL4393s configured as a 2:1 RGB

multiplexer, and cable driver, driving 75Ω, back terminated

cables. Each channel of the EL4393 is configured to give a

gain of two, to make up for the losses of the back terminating

resistor.

In this example, the Disable pins of each RGB section are

driven by a complementary TTL “select” signal. Larger multi-

plexers can be assembled, with a 1-of-n TTL decoder

selecting each RGB triplet.

6

The circuit gives channel isolations of typically better than

-50dB at 10MHz, and with a 20dB/decade slope, extending

down to better than -90dB at frequencies below 100kHz.

The schematic does not show things like power supply

decoupling, or pcb layout, grounding and signal returns, but

these will all affect the overall performance of the circuit, and

care should be taken with these aspects.

It is recommended that the VCC and VEE pins each be

decoupled by a 0.1µF NPO or X7R dielectric ceramic capac-

itors to ground within 0.1 inch of the part, and in parallel with

the 0.1µF, a 47µF tantalum capacitor, also to ground. The

47µF capacitors should be within 0.25 inch of their power

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