EL5444CN 데이터 시트보기 (PDF) - Elantec -> Intersil

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EL5444CN

100 MHz Single Supply Rail to Rail Amplifier

Elantec -> Intersil 

EL5144C, EL5146C, EL5244C, EL5246C,

EL5444C

100 MHz Single Supply Rail to Rail Amplifier

ground with an RLCL time constants. 500 nsec later,

Amp B turns on and VIN2 is passed through to the out-

put. This break-before-make operation ensures that more

than one amplifier isn’t trying to drive the bus at the

same time. Notice the outputs are tied directly together.

Isolation resistors at each output are not necessary.

VIN 1

3VPP

1

10MHz

2

3

4

Select

5

6

VIN 2

2.4VPP

7

5MHz

-

+

EL5246C

+

-

14

VOUT

13

12

+5V

11

10 4.7µF 0.1µF

9

150Ω

8

Figure 5

5V

VOUT

Free Running Oscillator Application

Figure 7 is an EL5144C 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--

For rail to rail output swings, maximum frequency of

oscillation is around 15 MHz. If reduced output swings

are acceptable, 25 MHz can be achieved. Figure 8 shows

the oscillator for ROSC = 510 Ω, COSC = 240 pF and

FOSC = 6 MHz.

470K

1

470K

2

3

470K

+5V

5

0.1µF

4

ROSC

COSC

0V

5V

Select

0V

Figure 6

5V

VOUT

Figure 7

0V

Figure 8

19

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