HCPL-3150-XXXE Просмотр технического описания (PDF) - HP => Agilent Technologies

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HCPL-3150-XXXE

High CMR/ High Speed TTL Compatible Optocouplers

HP => Agilent Technologies 

20

1

8

+5 V

CLEDP

2

7

3

6

Q1

CLEDN

ILEDN

4

5

SHIELD

Figure 32. Not Recommended Open Collector

Drive Circuit.

1

8

+5 V

CLEDP

2

7

3

6

CLEDN

4

5

SHIELD

Figure 33. Recommended LED Drive Circuit

for Ultra-High CMR.

ILED1

ILED1

VOUT1

VOUT2

Q1 ON

Q2 OFF

Q1 OFF

Q2 ON

VOUT1

VOUT2

Q1 ON

Q2 OFF

Q1 OFF

Q2 ON

ILED2

tPHL MAX

tPLH MIN

PDD* MAX = (tPHL- tPLH)MAX = tPHL MAX - tPLH MIN

*PDD = PROPAGATION DELAY DIFFERENCE

NOTE: FOR PDD CALCULATIONS THE PROPAGATION DELAYS

ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.

ILED2

tPHL MIN

tPHL MAX

tPLH

MIN

(tPHL-tPLH) MAX

= PDD* MAX

tPLH MAX

Figure 34. Minimum LED Skew for Zero Dead Time.

MAXIMUM DEAD TIME

(DUE TO OPTOCOUPLER)

= (tPHL MAX - tPHL MIN) + (tPLH MAX - tPLH MIN)

= (tPHL MAX - tPLH MIN) – (tPHL MIN - tPLH MAX)

= PDD* MAX – PDD* MIN

*PDD = PROPAGATION DELAY DIFFERENCE

NOTE: FOR DEAD TIME AND PDD CALCULATIONS ALL PROPAGATION

DELAYS ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.

Figure 35. Waveforms for Dead Time.

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