Data Sheet

ADuM3154

ELECTRICAL CHARACTERISTICS—MIXED 5 V/3.3 V OPERATION

Table 6. Switching Specifications

Parameter

Symbol

A Grade

B Grade

Unit

Test Conditions/Comments

Min

Typ

Max

Min

Typ

Max

MCLK, MO, SO

SPI Clock Rate

1

15.6

MHz

Data Rate Fast (MO, SO)

2

34

Mbps

Within PWD limit

Propagation Delay

27

17

ns

50% input to 50% output

Pulse Width

PW

25

12.5

ns

Within PWD limit

Pulse Width Distortion

PWD

2

2

ns

2

2

ns

Jitter, High Speed

1

1

ns

MSS

Data Rate Fast

2

34

Mbps

Within PWD limit

Propagation Delay

30

30

ns

50% input to 50% output

Pulse Width

PW

25

12.5

ns

Within PWD limit

Pulse Width Distortion

PWD

2

2

ns

1.5

10

ns

Jitter, High Speed

1

1

ns

SSA0, SSA1

Data Rate Slow

250

250

kbps

Within PWD limit

Propagation Delay

0.1

2.6

0.1

2.6

µs

50% input to 50% output

Pulse Width

PW

4

4

µs

Within PWD limit

Jitter, Low Speed

2.5

2.5

µs

40

40

ns

1

Codirectional channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on the same side of the isolation

barrier.

2

The MSS signal is glitch filtered in both speed grades, whereas the other fast signals are not glitch filtered in the B grade. To guarantee that MSS reaches the output

ahead of another fast signal, set up MSS prior to the competing signal by different times depending on speed grade.

3

SSAx = SSA1 or SSA2.

4

An internal asynchronous clock, not available to users, samples the low speed signals. If edge sequence in codirectional channels is critical to the end application, the

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