ISO7142CCDBQ datasheet(13/26 Pages) TI

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ISO7142CC

www.ti.com

SLLSEF1B – SEPTEMBER 2013 – REVISED AUGUST 2015

8.3 Feature Description

8.3.1 Insulation and Safety-Related Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DTI

Distance through the insulation

Minimum internal gap (internal clearance)

0.014

(1)

Input capacitance

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

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIOTM

Maximum transient isolation voltage

4242

VPK

VIORM

Maximum working isolation voltage

566

VPK

After Input/Output safety test subgroup 2/3,

VPR = VIORM x 1.2, t = 10 s,

679

Partial discharge < 5 pC

Method a, After environmental tests subgroup 1,

VPR

Input-to-output test voltage

VPR = VIORM x 1.6, t = 10 s,

906

VPK

Partial discharge < 5 pC

Method b1, 100% production test,

VPR = VIORM x 1.875, t = 1 s,

1061

Partial discharge < 5 pC

L(I01)

Minimum air gap (clearance)

Shortest terminal to terminal distance through air

3.7

Minimum external tracking

Shortest terminal to terminal distance across the

L(I02)

3.7

(creepage)

package surface

Pollution degree

Tracking resistance (comparative

CTI

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

≥400

tracking index)

VIO = 500 V, TA = 25

>1012

RIO

(2)

Isolation resistance, input to output

VIO = 500 V, 100

oC ≤ T

A ≤ 125

>1011

VIO = 500 V, TS = 150

>109

CIO

(2)

Barrier capacitance, input to output

VI = 0.4 sin (2πft), f = 1 MHz

2.4

UL 1577

Withstanding Isolation voltage

VTEST = VISO= 2500 VRMS, 60 sec (qualification);

VISO

VTEST = 1.2 * VISO= 3000 VRMS, 1 sec (100%

2500

VRMS

production)

(1)

Measured from input data pin to ground.

(2)

All pins on each side of the barrier tied together creating a two-terminal device.

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 in certain cases.

Techniques such as inserting grooves and/or ribs on a printed circuit board are used to

help increase these specifications.

Table 1. IEC 60664-1 Ratings Table

PARAMETER

TEST CONDITIONS

SPECIFICATION

Material Group

Rated mains voltage

≤ 150 VRMS

I–IV

Installation classification / Overvoltage

Category for Basic Insulation

Rated mains voltage

≤ 300 VRMS

I–III

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