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ADM2485

High Speed, Isolated RS-485 Transceiver with Integrated Transformer Driver

Analog Devices 

ADM2485

VDE 0884-2 INSULATION CHARACTERISTICS

This isolator is suitable for basic electrical isolation only within the safety limit data. Maintenance of the safety data must be ensured by

means of protective circuits.

An asterisk (*) on packages denotes DIN V VDE V 0884-10 approval.

Table 6.

Description

Installation Classification per DIN VDE 0110 for Rated Mains Voltage

≤150 V rms

≤300 V rms

≤400 V rms

Climatic Classification

Pollution Degree (DIN VDE 0110: 1989-01, Table 1)

Maximum Working Insulation Voltage

Input-to-Output Test Voltage

Method B1: VIORM × 1.875 = VPR, 100% Production Tested, tm = 1 sec, Partial Discharge < 5 pC

Method A (After Environmental Tests, Subgroup 1): VIORM × 1.6 = VPR, tm = 60 sec,

Partial Discharge <5 pC

Method A (After Input and/or Safety Test, Subgroup 2/3): VIORM × 1.2 = VPR, tm = 60 sec,

Partial Discharge <5 pC

Highest Allowable Overvoltage1

Safety-Limiting Values2

Case Temperature

Input Current

Output Current

Insulation Resistance at TS3

Symbol Characteristic Unit

VIORM

VPR

VTR

I to IV

I to III

I to II

40/85/21

2

560

1050

896

672

4000

V peak

V peak

V peak

V peak

V peak

TS

150

°C

IS, INPUT

265

mA

IS, OUTPUT

335

mA

RS

>109

Ω

1 Transient overvoltage, tTR = 10 sec.

2 The safety-limiting value is the maximum value allowed in the event of a failure. See Figure 14 for the thermal derating curve.

3 VIO = 500 V.

Rev. A | Page 7 of 20

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