ADUM1240 datasheet(5/24 Pages) AD

Part #	ADUM1240

Description	Micropower, Dual-Channel Digital Isolators

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Data Sheet

ADuM1240/ADuM1241/ADuM1245/ADuM1246

Table 6.

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions/Comments

DC SPECIFICATIONS

Input Threshold

Logic High

VIH

0.7 VDDx1

V

Logic Low

VIL

0.3 VDDx1

V

Output Voltages

Logic High

VOH

VDDx1 − 0.1

2.5

V

IOx = −20 µA, VIx = VIxH

VDDx1 − 0.4

2.35

V

IOx = −4 mA, VIx = VIxH

Logic Low

VOL

0.0

0.1

V

IOx = 20 µA, VIx = VIxL

0.1

0.4

V

IOx = 4 mA, VIx = VIxL

Input Current per Channel

II

−1

+0.01

+1

µA

0 V ≤ VIx ≤ VDDx1

Input Switching Thresholds

Positive Threshold Voltage

VT+

1.5

V

Negative Going Threshold

VT−

1.0

V

Input Hysteresis

ΔVT

0.5

V

Undervoltage Lockout, VDD1 or VDD2

UVLO

1.5

V

Supply Current per Channel

Quiescent Current

Input Supply

IDDI (Q)

2.6

3.75

µA

ENX low

Output Supply

IDDO (Q)

0.5

3.75

µA

ENX low

Input (Refresh Off)

IDDI (Q)

0.05

µA

ENX high

Output (Refresh Off)

IDDO (Q)

0.05

µA

ENX high

Dynamic Supply Current

Input

IDDI (D)

76

µA/Mbps

Output

IDDO (D)

41

µA/Mbps

AC SPECIFICATIONS

Output Rise Time/Fall Time

tR/tF

2

ns

10% to 90%

Common-Mode Transient Immunity2

|CM|

25

40

kV/µs

VIx = VDDx1, VCM = 1000 V,

transient magnitude = 800 V

Refresh Rate

fr

14

kbps

1

VDDx = VDD1 or VDD2.

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

falling common-mode voltage edges.

Rev. A | Page 5 of 24

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