HFA1212(2004) Ver la hoja de datos (PDF) - Intersil

Número de pieza

componentes Descripción

Fabricante

HFA1212
(Rev.:2004)

Dual 350MHz, Low Power Closed Loop Buffer Amplifier

Intersil 

HFA1212

50

40

30

20

AV = +1

AV = +2

10

0

0

50 100 150 200 250 300 350 400

LOAD CAPACITANCE (pF)

FIGURE 1. RECOMMENDED SERIES RESISTOR vs LOAD

CAPACITANCE

Evaluation Board

The performance of the HFA1212 may be evaluated using

the HA5023 Evaluation Board, slightly modified as follows:

1. Remove the two feedback resistors, and leave the con-

nections open.

2. a. For AV = +1 evaluation, remove the gain setting

resistors (R1), and leave pins 2 and 6 floating.

b. For AV = +2, replace the gain setting resistors (R1) with

0Ω resistors to GND.

3. Replace the 0Ω series output resistors with 50Ω.

The modified schematic for amplifier 1, and the board layout

are shown in Figures 2 and 3.

NOTE: Note: The SOIC version may be evaluated in the DIP board

by using a SOIC-to-DIP adapter such as Aries Electronics Part

Number 08-350000-10.

To order evaluation boards (part number HA5023EVAL),

please contact your local sales office.

OUT

50Ω

1

R1 (NOTE)

2

IN

3

50Ω

4

−5V

10µF

0.1µF

8

+5V

+−

7

6

0.1µF 10µF

5

GND

GND

NOTE: R1 = ∞ (AV = +1)

or 0Ω (AV = +2)

FIGURE 2. MODIFIED EVALUATION BOARD SCHEMATIC

FIGURE 3B. BOTTOM LAYOUT

FIGURE 3. EVALUATION BOARD LAYOUT

FIGURE 3A. TOP LAYOUT

6

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