adm2491e Analog Devices, Inc., adm2491e Datasheet - Page 5

• Manufacturer Part Number: adm2491e
• Description: High Speed, Esd-protected, Half-/full-duplex, Icoupler Isolated Rs-485 Transceiver
• Manufacturer: Analog Devices, Inc.

INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 5.
Parameter
Rated Dielectric Insulation Voltage
Minimum External Air Gap (Clearance)
Minimum External Tracking (Creepage)
Minimum Internal Gap (Internal Clearance)
Tracking Resistance (Comparative Tracking Index)
Isolation Group
VDE 0884 INSULATION CHARACTERISTICS (PENDING)
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 a package denotes VDE 0884 approval for 848 V peak working voltage.
Table 6.
Description
Installation Classification per DIN VDE 0110 for Rated Mains Voltage
Climatic Classification
Pollution Degree (DIN VDE 0110, see Table 1)
Maximum Working Insulation Voltage
Input-to-Output Test Voltage, Method b1
Input-to-Output Test Voltage, Method a
Highest Allowable Overvoltage (Transient Overvoltage, t
Safety-Limiting Values (Maximum Value Allowed in the Event of a Failure; see Figure 20)
Insulation Resistance at T
≤300 V rms
≤450 V rms
≤600 V rms
V
After Environmental Tests, Subgroup 1
After Input and/or Safety Test, Subgroup 2/Subgroup 3
Case Temperature
Input Current
Output Current
IORM
V
V
IORM
IORM
× 1.875 = V
× 1.6 = V
× 1.2 = V
PR
PR
PR
, 100% Production Tested, t
, t
, t
m
m
= 60 sec, Partial Discharge < 5 pC
= 60 sec, Partial Discharge < 5 pC
S
, V
IO
= 500 V
m
= 1 sec, Partial Discharge < 5 pC
Symbol
L(I01)
L(I02)
CTI
TR
= 10 sec)
Rev. 0 | Page 5 of 16
Value
5000
7.7
8.1
0.017
>175
IIIa
Unit
V rms
mm min
mm min
mm min
V
Symbol
V
V
V
V
T
I
I
R
S
S
S
IORM
PR
PR
TR
,
,
S
INPUT
OUTPUT
Conditions
1 minute duration
Measured from input terminals to output
terminals, shortest distance through air
Measured from input terminals to output
terminals, shortest distance along body
Insulation distance through insulation
Material Group (DIN VDE 0110, 1/89)
DIN IEC 112/VDE 0303 Part 1
Characteristic
I to IV
I to II
I to II
40/105/21
2
846
1590
1357
1018
6000
150
265
335
>10
9
ADM2491E
Unit
V peak
V peak
V peak
V peak
V peak
°C
mA
mA
Ω