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EVAL-AD7401EB

Isolated Sigma-Delta Modulator

Analog Devices 

AD7401

DIN EN 60747-5-2 (VDE 0884 PART 2) INSULATION CHARACTERISTICS

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

of protective circuits.

Table 5.

Description

INSTALLATION CLASSIFICATION PER DIN VDE 0110

For Rated Mains Voltage ≤ 300 V rms

For Rated Mains Voltage ≤ 450 V rms

For Rated Mains Voltage ≤ 600 V rms

CLIMATIC CLASSIFICATION

POLLUTION DEGREE (DIN VDE 0110, TABLE I)

MAXIMUM WORKING INSULATION VOLTAGE

INPUT-TO-OUTPUT TEST VOLTAGE, METHOD B1

VIORM × 1.875 = VPR, 100% Production Test, tm = 1 sec, Partial Discharge < 5 pC

INPUT-TO-OUTPUT TEST VOLTAGE, METHOD A

After Environmental Test Subgroup 1

VIORM × 1.6 = VPR, tm = 60 sec, Partial Discharge < 5 pC

After Input and/or Safety Test Subgroup 2/3

VIORM × 1.2 = VPR, tm = 60 sec, Partial Discharge < 5 pC

HIGHEST ALLOWABLE OVERVOLTAGE (TRANSIENT OVERVOLTAGE, tTR = 10 sec)

SAFETY-LIMITING VALUES (MAXIMUM VALUE ALLOWED IN THE EVENT OF A FAILURE, ALSO SEE Figure 4)

Case Temperature

Side 1 Current

Side 2 Current

INSULATION RESISTANCE AT TS, VIO = 500 V

Symbol Characteristic Unit

VIORM

I–IV

I–II

I–II

40/105/21

2

891

V peak

VPR

1671

VPR

1426

V peak

V peak

1069

V peak

VTR

6000

V peak

TS

150

°C

IS1

265

mA

IS2

335

mA

RS

>109

Ω

350

300

250

SIDE #2

200

150

SIDE #1

100

50

0

0

50

100

150

200

CASE TEMPERATURE (°C)

Figure 4. Thermal Derating Curve, Dependence of Safety-Limiting Values

with Case Temperature per DIN EN 60747-5-2

Rev. A | Page 6 of 20

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