ISO7641FC datasheet(20/37 Pages) TI2

20 / 37 page

OSC

PWM

VREF

LPF

VREF

DCL

OUT

1 S

Isolation Barrier

Low t Frequency

Channel

(DC...100 kbps)

High t Frequency

Channel

(100 kbps...25 Mbps)

Polarity and

Threshold Selection

Polarity and Threshold Selection

ISO7631FM, ISO7631FC, ISO7641FC

SLLSEC3F – SEPTEMBER 2012 – REVISED APRIL 2016

www.ti.com

Product Folder Links: ISO7631FM ISO7631FC ISO7641FC

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Functional Block Diagram (continued)

(1)

Per JEDEC package dimensions.

(2)

Measured from input pin to ground.

Figure 21. ISO7631FC and ISO7641FC Conceptual Block Diagram

9.3 Feature Description

9.3.1 Package Insulation and Safety-Related Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

L(I01)

Minimum air gap (Clearance)

Shortest terminal to terminal distance through air

L(I02)(1)

Minimum external tracking

(Creepage)

Shortest terminal to terminal distance across the

package surface

CTI

Tracking resistance (Comparative

Tracking Index)

DIN EN 60112 (VDE 0303-11); IEC 60112

≥400

DTI

Minimum Internal Gap (Internal

Clearance)

Distance through the insulation

0.014

(2)

Input capacitance

VI = VCC/2 + 0.4 sin (2πft), f = 1MHz, VCC = 5 V

spacer

NOTE

Creepage and clearance requirements should be applied according to the specific

equipment isolation standards of an application. Care should be taken to maintain the

creepage and clearance distance of a board design to ensure that the mounting pads of

the isolator on the printed circuit board do not reduce this distance.

Creepage and clearance on a printed circuit board become equal according to the

measurement techniques shown in the Isolation Glossary. Techniques such as inserting

grooves and/or ribs on a printed circuit board are used to help increase these

specifications.

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