ADUM1280 データシートの表示（PDF） - Analog Devices

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ADUM1280

3 kV RMS Dual Channel Digital Isolators

Analog Devices 

ADuM1280/ADuM1281/ADuM1285/ADuM1286

Data Sheet

Parameter

Undervoltage Lockout

Positive VDDx Threshold

Negative VDDx Threshold

VDDx Hysteresis

AC SPECIFICATIONS

Output Rise/Fall Time

Common-Mode Transient Immunity1

Refresh Period

Symbol Min

VDDXUV+

VDDXUV-

VDDXUVH

tR/tF

|CM|

25

tr

Typ

Max

Unit

2.6

V

2.4

V

0.2

V

2.5

ns

35

kV/µs

1.6

µs

Test Conditions

10% to 90%

VIx = VDDx, VCM = 1000 V,

transient magnitude = 800 V

1 |CM| is the maximum common-mode voltage slew rate that can be sustained while maintaining Vo > 0.8 VDDx. The common-mode voltage slew rates apply to both rising and

falling common-mode voltage edges.

ELECTRICAL CHARACTERISTICS—3 V OPERATION (A, B, AND C GRADES)

All typical specifications are at TA = 25°C, VDD1 = VDD2 = 3.0 V. Minimum/maximum specifications apply over the entire recommended operation

range: 3.0 V ≤ VDD1 ≤ 3.6 V, 3.0 V ≤ VDD2 ≤ 3.6 V, −40°C ≤ TA ≤ 125°C, unless otherwise noted. Switching specifications are tested with CL = 15 pF

and CMOS signal levels, unless otherwise noted.

Table 4.

Parameter

SWITCHING SPECIFICATIONS

Pulse Width

Data Rate

Propagation Delay

Symbol

PW

tPHL, tPLH

Pulse Width Distortion

Change vs. Temperature

Propagation Delay Skew

PWD

tPSK

Channel Matching1

Codirectional

Opposing-Direction

Jitter

tPSKCD

tPSKOD

A Grade

Min Typ Max

1000

1

50

10

7

38

5

10

2

B Grade

Min Typ Max

40

25

35

3

3

16

3

6

2

C Grade

Min Typ Max

10

100

20 25 33

2.5

1.5

12

2.5

5

1

Unit

ns

Mbps

ns

ns

ps/°C

ns

ns

ns

ns

Test Conditions

Within PWD limit

Within PWD limit

50% input to 50%

output

|tPLH − tPHL|

Between any

two units at same

operating conditions

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. Opposing-direction channel matching is the absolute value of the difference in propagation delays between any two channels with inputs on opposing sides

of the isolation barrier.

Table 5.

1 Mbps–A, B, C Grade 25 Mbps–B, C Grade 100 Mbps–C Grade

Parameter

Symbol Min Typ Max Min Typ Max Min Typ Max Unit Test Conditions

SUPPLY CURRENT

No load

ADuM1280/ADuM1285 IDD1

0.75 1.4

5.1 9.0

17 23 mA

IDD2

2.0 3.5

2.7 4.6

4.8 9

mA

ADuM1281/ADuM1286 IDD1

1.6 2.1

3.8 5.0

11 15 mA

IDD2

1.7 2.3

3.9 6.2

11 15 mA

Rev. C | Page 4 of 22

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