ZXFV202N8EV Diodes Zetex, ZXFV202N8EV Datasheet

ZXFV202N8EV

Manufacturer Part Number

ZXFV202N8EV

Description

BOARD EVALUATION FOR ZXFV202

Manufacturer

Diodes Zetex

Datasheets

1.ZXFV202E5TA.pdf (10 pages)

2.ZXFV202N8EV.pdf (2 pages)

Specifications of ZXFV202N8EV

Main Purpose

Video, Amplifier, Single

Embedded

Utilized Ic / Part

ZXFV202

Primary Attributes

Current Feedback, 210MHz, 600V/us, ±5 V

Secondary Attributes

Gain of 1 or 2, 40mA Output

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

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SINGLE CHANNEL VIDEO AMPLIFIER EVALUATION BOARD

Evaluation board description

The wide bandwidth of the ZXFV202 video amplifier

necessitates some care in the layout of the printed

circuit. For this reason Zetex has made available an

Evaluation Board.

The Evaluation Board layout serves as a useful

example for many applications, showing a practical

implementation of the advice given below.

Figures 1, 2 and 3 show the schematic and copper

layout of a double-sided printed circuit board suitable

for evaluation of the device in the laboratory.

BNC connector sockets allow connection to test

instruments via 50 cables. The output circuit includes

a resistor matching circuit to present a load of 150 to

the amplifier (equivalent to a 75

video line) and simultaneously provide 50

impedance.

The attenuation of this matching circuit is 15.45 dB. As

the amplifier is configured for a voltage gain of 2, the

overall gain is:

6 - 15.45 = -9.45dB.

ISSUE 1 - MAY 2004

back-terminated

Figure 1 Circuit schematic

output

PCB design

A continuous ground plane is required under the

device and its signal connection paths, to provide the

shortest possible ground return paths for signals and

power supply filtering.

A double-sided or multi-layer PCB construction is

required, with plated-through via holes providing

closely spaced low-inductance connections from some

components to the continuous ground plane (some of

these holes are not visible in the figures for the

Evaluation Board – artworks and NC drill output can be

provided if required).

Power supply filtering

For the power supply filtering, low inductance surface

mount capacitors are normally required. It has been

found that very good RF decoupling is provided on

each supply using a 1000pF NPO size 0805 or smaller

ceramic surface mount capacitor, closest to the device

pin, with an adjacent 0.1µF X7R capacitor. Other

configurations are possible and it may be found that a

single 0.01uF X7R capacitor on each supply gives good

results. However this should be supported by larger

decoupling capacitors elsewhere on the printed circuit

board. Values of 1 to 10 µF are recommended,

particularly where the voltage regulators are located

more than a few inches from the device. These larger

capacitors are recommended to be solid tantalum

electrolytic or ceramic types.

A parts list is provided on the next page.

ZXFV202N8EV

S E M I C O N D U C T O R S

Related parts for ZXFV202N8EV

ZXFV202N8EV Summary of contents

Page 1

... Values µF are recommended, particularly where the voltage regulators are located more than a few inches from the device. These larger capacitors are recommended to be solid tantalum electrolytic or ceramic types. A parts list is provided on the next page. Figure 1 Circuit schematic 1 ZXFV202N8EV ...

Page 2

... ZXFV202N8EV Evaluation Board Parts List: QTY CCT-REF VALUE DESCRIPTION Resistors, surface mount 1 R1, 51R 0805 2 R2,R3 1k 0805 1 R4 120R 0805 1 R5 10R 0805 1 R6 62R 0805 Capacitors, surface mount 2 C1,C2 1nF 25V ceramic 0805 X7R 2 C3,C4 100nF 50V ceramic 0805 NPO ...

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