EL5246CSZ Просмотр технического описания (PDF) - Renesas Electronics

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EL5246CSZ

100MHz Single-Supply Rail-to-Rail Amplifiers

Renesas Electronics 

EL5144, EL5146, EL5244, EL5246, EL5444

VIN 1

3VPP

Sele

VIN 2

2.4VPP

1

14

2

-

+

13

3

12

EL5246

4

11

VOUT

+5V

5

6

+

-

7

10 4.7µ 0.1µ

9

150

8

FIGURE 52.

5V

VOUT

0V

5V

Selec

0V

FIGURE 53.

470K

+5V

1

470K

2

3

470K

5

0.1µ

4

ROS

COS

FIGURE 54.

5V

VOUT

0V

FIGURE 55.

5V

0V

FIGURE 56.

Free Running Oscillator Application

Figure 54 is an EL5144 configured as a free running oscillator.

To first order, ROSC and COSC determine the frequency of

oscillation according to:

FOSC = R-----O-----S---C--0---.--7---2-C----O-----S----C--

(EQ. 4)

For rail to rail output swings, maximum frequency of oscillation

is around 15MHz. If reduced output swings are acceptable,

25MHz can be achieved. Figure 55 shows the oscillator for

ROSC = 510, COSC = 240pF and FOSC = 6MHz.

FN7177 Rev 2.00

March 31, 2011

Page 19 of 24

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