ANALOG DEVICES ADM2582E, ADM2587E Service Manual

Signal and Power Isolated RS-485

V

V

Transceiver with ±15 kV ESD Protection

FEATURES

Isolated RS-485/RS-422 transceiver, configurable as half or

full duplex

isoPower® integrated isolated dc-to-dc converter
±15 kV ESD protection on RS-485 input/output pins
Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E)
ADM2582E data rate: 16 Mbps
ADM2587E data rate: 500 kbps
5 V or 3.3 V operation
Connect up to 256 nodes on one bus
Open- and short-circuit, fail-safe receiver inputs
High common-mode transient immunity: >25 kV/μs
Thermal shutdown protection
Safety and regulatory approvals (pending)

UL recognition: 2500 V rms for 1 minute per UL 1577
VDE Certificates of Conformity

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

= 560 V peak

IORM

Operating temperature range: −40°C to +85°C
Highly integrated, 20-lead, wide-body SOIC package

APPLICATIONS

Isolated RS-485/RS-422 interfaces
Industrial field networks
Multipoint data transmission systems

DIGITAL ISOLATION iCoupler

TxD

DE

RxD

RE

ADM2582E/ADM2587E

FUNCTIONAL BLOCK DIAGRAM

CC

isoPower DC-TO-DC CONVER TER

OSCILLATOR

ENCODE

ENCODE

DECODE

GND

1

ISOLATION

BARRIER

RECTIF IER

REGULATOR

TRANSCEIVER

DECODE D

DECODE

ENCODE

ADM2582E/ADM2587E

GND

Figure 1.

ISOOUT

2

V

ISOIN

Y

Z

R

A

B

08111-001

GENERAL DESCRIPTION

The ADM2582E/ADM2587E are fully integrated signal and
power isolated data transceivers with ±15 kV ESD protection
and are suitable for high speed communication on multipoint
transmission lines. The ADM2582E/ADM2587E include an
integrated isolated dc-to-dc power supply, which eliminates the
need for an external dc-to-dc isolation block.

They are designed for balanced transmission lines and comply
with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E).

The devices integrate Analog Devices, Inc., iCoupler® technology to
combine a 3-channel isolator, a three-state differential line driver, a
differential input receiver, and Analog Devices isoPower dc-to­dc converter into a single package. The devices are powered by a
single 5 V or 3.3 V supply, realizing a fully integrated signal and
power isolated RS-485 solution.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.

The ADM2582E/ADM2587E driver has an active high enable.
An active low receiver enable is also provided that causes the
receiver output to enter a high impedance state when disabled.

The devices have current limiting and thermal shutdown
features to protect against output short circuits and situations
where bus contention may cause excessive power dissipation.
The parts are fully specified over the industrial temperature
range and are available in a highly integrated, 20-lead, wide­body SOIC package.

The ADM2582E/ADM2587E contain isoPower technology that
uses high frequency switching elements to transfer power through
the transformer. Special care must be taken during printed circuit
board (PCB) layout to meet emissions standards. Refer to
Application Note AN-0971, Control of Radiated Emissions with
isoPower Devices, for details on board layout considerations.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2009 Analog Devices, Inc. All rights reserved.

ADM2582E/ADM2587E

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1 

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications ..................................................................................... 3

ADM2582E Timing Specifications ............................................ 4

ADM2587E Timing Specifications ............................................ 4

ADM2582E/ADM2587E Package Characteristics ................... 4

ADM2582E/ADM2587E Regulatory Information .................. 5

ADM2582E/ADM2587E Insulation and Safety-Related

Specifications ................................................................................ 5

ADM2582E/ADM2587E VDE 0884 Insulation

Characteristics (Pending) ............................................................ 5

Absolute Maximum Ratings ............................................................ 6

ESD Caution .................................................................................. 6

Pin Configuration and Function Descriptions ............................. 7

Typical Performance Characteristics ............................................. 8





Test Circuits ..................................................................................... 12

Switching Characteristics .............................................................. 13

Circuit Description......................................................................... 14

Signal Isolation ........................................................................... 14

Power Isolation ........................................................................... 14

Truth Tables................................................................................. 14

Thermal Shutdown .................................................................... 14

Open- and Short-Circuit, Fail-Safe Receiver Inputs.............. 14

DC Correctness and Magnetic Field Immunity ........................... 15

Applications Information .............................................................. 16

PCB Layout ................................................................................. 16

EMI Considerations ................................................................... 16

Insulation Lifetime ..................................................................... 16

Isolated Power Supply Considerations .................................... 17

Typical Applications ................................................................... 19

Outline Dimensions ....................................................................... 20

Ordering Guide .......................................................................... 20

REVISION HISTORY

9/09—Revision 0: Initial Version

Rev. 0 | Page 2 of 20

ADM2582E/ADM2587E

SPECIFICATIONS

All voltages are relative to their respective ground; 3.0 ≤ VCC ≤ 5.5 V. All minimum/maximum specifications apply over the entire
recommended operation range, unless otherwise noted. All typical specifications are at T

Table 1.

Parameter Symbol Min Typ Max Unit Test Conditions

ADM2587E SUPPLY CURRENT ICC

Data Rate ≤ 500 kbps 90 mA VCC = 3.3 V, 100 Ω load between Y and Z
72 mA VCC = 5 V, 100 Ω load between Y and Z
125 mA VCC = 3.3 V, 54 Ω load between Y and Z
98 mA VCC = 5 V, 54 Ω load between Y and Z

120 mA 120 Ω load between Y and Z

ADM2582E SUPPLY CURRENT ICC

Data Rate = 16 Mbps 150 mA 120 Ω load between Y and Z
230 mA 54 Ω load between Y and Z
ISOLATED SUPPLY VOLTAGE V

3.3

ISOUT

DRIVER

Differential Outputs

Differential Output Voltage, Loaded |V

| 2.0 5.0 V RL = 100 Ω (RS-422), see Figure 23

OD2

1.5 5.0 V RL = 54 Ω (RS-485), see Figure 23
|V

| 1.5 5.0 V −7 V ≤ V

OD3

Δ|VOD| for Complementary Output States Δ|VOD| 0.2 V RL = 54 Ω or 100 Ω, see Figure 23
Common-Mode Output Voltage VOC 3.0 V RL = 54 Ω or 100 Ω, see Figure 23
Δ|VOC| for Complementary Output States Δ|VOC| 0.2 V RL = 54 Ω or 100 Ω, see Figure 23
Short-Circuit Output Current IOS 200 mA

Output Leakage Current (Y, Z) IO 30 μA

−30 μA

Logic Inputs DE, RE, TxD

Input Threshold Low VIL 0.3 × VCC V
Input Threshold High VIH 0.7 × VCC V
Input Current II −10 0.01 10 μA

RECEIVER

Differential Inputs

Differential Input Threshold Voltage VTH −200 −125 −30 mV −7 V < VCM < +12 V
Input Voltage Hysteresis V

15 mV VOC = 0 V

HYS

Input Current (A, B) II 125 μA DE = 0 V, VCC = 0 V or 3.6 V, VIN = 12 V

−100 μA DE = 0 V, VCC = 0 V or 3.6 V, VIN = -7 V
Line Input Resistance RIN 96 kΩ −7 V < VCM < +12 V

Logic Outputs

Output Voltage Low VOL 0.2 0.4 V IO = 1.5 mA, VA − VB = −0.2 V
Output Voltage High VOH V

− 0.3 VCC − 0.2 V IO = −1.5 mA, VA − VB = 0.2 V

CC

Short-Circuit Current 100 mA

COMMON-MODE TRANSIENT IMMUNITY1 25 kV/μs VCM = 1 kV, transient magnitude = 800 V

1

CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. VCM is the common-mode potential

difference between the logic and bus sides. The transient magnitude is the range over which the common-mode is slewed. The common-mode voltage slew rates
apply to both rising and falling common-mode voltage edges.

= 25°C, VCC = 5 V unless otherwise noted.

A

≤ 12 V, see Figure 24

TEST1

DE = 0 V, RE

= 0 V, VCC = 0 V or 3.6 V,

VIN = 12 V
DE = 0 V, RE

= 0 V, VCC = 0 V or 3.6 V,

VIN = −7 V

, TxD

DE, RE

, TxD

DE, RE

, TxD

DE, RE

Rev. 0 | Page 3 of 20

ADM2582E/ADM2587E

ADM2582E TIMING SPECIFICATIONS

TA = −40°C to +85°C.

Table 2.

Parameter Symbol Min Typ Max Unit Test Conditions

DRIVER

Maximum Data Rate 16 Mbps
Propagation Delay, Low to High t
Propagation Delay, High to Low t
Output Skew t
Rise Time/Fall Time tDR, tDF 15 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29
Enable Time tZL, tZH 120 ns RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31
Disable Time tLZ, tHZ 150 ns RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31

RECEIVER

Propagation Delay, Low to High t
Propagation Delay, High to Low t
Output Skew1 t
Enable Time tZL, tZH 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32
Disable Time tLZ, tHZ 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32

1

Guaranteed by design.

ADM2587E TIMING SPECIFICATIONS

TA = −40°C to +85°C.

63 100 ns RL = 54 Ω, CL1 = C

DPLH

64 100 ns RL = 54 Ω, CL1 = C

DPHL

1 8 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29

SKEW

94 110 ns CL = 15 pF, see Figure 27 and Figure 30

RPLH

95 110 ns CL = 15 pF, see Figure 27 and Figure 30

RPHL

1 12 ns CL = 15 pF, see Figure 27 and Figure 30

SKEW

= 100 pF, see Figure 25 and Figure 29

L2

= 100 pF, see Figure 25 and Figure 29

L2

Table 3.

Parameter Symbol Min Typ Max Unit Test Conditions

DRIVER

Maximum Data Rate 500 kbps
Propagation Delay, Low to High t
Propagation Delay, High to Low t
Output Skew t

250 503 700 ns RL = 54 Ω, CL1 = C

DPLH

250 510 700 ns RL = 54 Ω, CL1 = C

DPHL

7 100 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29

SKEW

= 100 pF, see Figure 25 and Figure 29

L2

= 100 pF, see Figure 25 and Figure 29

L2

Rise Time/Fall Time tDR, tDF 200 1100 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29
Enable Time tZL, tZH 2.5 μs RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31
Disable Time tLZ, tHZ 200 ns RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31

RECEIVER

Propagation Delay, Low to High t
Propagation Delay, High to Low t
Output Skew t

91 200 ns CL = 15 pF, see Figure 27 and Figure 30

RPLH

95 200 ns CL = 15 pF, see Figure 27 and Figure 30

RPHL

4 30 ns CL = 15 pF, see Figure 27 and Figure 30

SKEW

Enable Time tZL, tZH 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32
Disable Time tLZ, tHZ 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32

ADM2582E/ADM2587E PACKAGE CHARACTERISTICS

Table 4.

Parameter Symbol Min Typ Max Unit Test Conditions

Resistance (Input-to-Output)1 R
Capacitance (Input-to-Output)1 C
Input Capacitance2 C
Input IC Junction-to-Case Thermal Resistance θ

Output IC Junction-to-Case Thermal Resistance θ

1

Device considered a 2-terminal device: short together Pin 1 to Pin 10 and short together Pin 11 to Pin 20.

2

Input capacitance is from any input data pin to ground.

10

I-O

3 pF f = 1 MHz

I-O

4 pF

I

33 °C/W

JCI

28 °C/W

JCO

Rev. 0 | Page 4 of 20

12

Ω

Thermocouple located at center of
package underside

Thermocouple located at center of
package underside

ADM2582E/ADM2587E

ADM2582E/ADM2587E REGULATORY INFORMATION

Table 5. Pending ADM2582E/ADM2587E Approvals

Organization Approval Type Notes

UL

VDE

ADM2582E/ADM2587E INSULATION AND SAFETY-RELATED SPECIFICATIONS

Table 6.

Parameter Symbol Value Unit Conditions

Rated Dielectric Insulation Voltage 2500 V rms 1-minute duration
Minimum External Air Gap (Clearance) L(I01) >8.0 mm

Minimum External Tracking (Creepage) L(I02) >8.0 mm

Minimum Internal Gap (Internal Clearance) 0.017 min mm Insulation distance through insulation
Tracking Resistance (Comparative Tracking Index) CTI >175 V DIN IEC 112/VDE 0303-1
Isolation Group IIIa Material Group (DIN VDE 0110: 1989-01, Table 1)

To be recognized under the Component
Recognition Program of Underwriters
Laboratories, Inc.

To be certified according to
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

In accordance with UL 1577, each ADM2582E/ADM2587E is proof tested
by applying an insulation test voltage ≥ 3000 V rms for 1 second.

In accordance with VDE 0884-10, each ADM2582E/ADM2587E is proof
tested by applying an insulation test voltage ≥ 1050 V

for 1 second.

PEAK

Measured from input terminals to output terminals,
shortest distance through air

Measured from input terminals to output terminals,
shortest distance along body

ADM2582E/ADM2587E 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.

Table 7.

Description Conditions Symbol Characteristic Unit

CLASSIFICATIONS

Installation Classification per DIN VDE 0110 for

Rated Mains Voltage
≤150 V rms I to IV
≤300 V rms I to III

≤400 V rms I to II
Climatic Classification 40/85/21
Pollution Degree DIN VDE 0110, see Table 1 2

VOLTAGE

Maximum Working Insulation Voltage V
Input-to-Output Test Voltage VPR

Method b1

Method a

After Environmental Tests, Subgroup 1 V
After Input and/or Safety Test,

Subgroup 2/Subgroup 3

Highest Allowable Overvoltage Transient overvoltage, tTR = 10 sec VTR 4000 V peak

SAFETY-LIMITING VALUES Maximum value allowed in the event of a failure

Case Temperature TS 150 °C
Input Current IS,
Output Current IS,
Insulation Resistance at TS V

560 V peak

IORM

× 1.875 = VPR, 100% production tested,

V

IORM

= 1 sec, partial discharge < 5 pC

t

m

× 1.6 = VPR, tm = 60 sec, partial discharge < 5 pC 896 V peak

IORM

× 1.2 = VPR, tm = 60 sec, partial discharge < 5 pC 672 V peak

V

IORM

= 500 V RS >109 Ω

IO

1050 V peak

265 mA

INPUT

335 mA

OUTPUT

Rev. 0 | Page 5 of 20

ADM2582E/ADM2587E

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted. All voltages are relative to
their respective ground.

Table 8.

Parameter Rating
VCC −0.5 V to +7 V
Digital Input Voltage (DE, RE, TxD)
Digital Output Voltage (RxD) −0.5 V to VDD + 0.5 V
Driver Output/Receiver Input Voltage −9 V to +14 V
Operating Temperature Range −40°C to +85°C
Storage Temperature Range −55°C to +150°C
ESD (Human Body Model) on

A, B, Y, and Z pins
ESD (Human Body Model) on Other Pins
Lead Temperature

Soldering (10 sec) 260°C

Vapor Phase (60 sec) 215°C

Infrared (15 sec) 220°C

−0.5 V to VDD + 0.5 V

±15 kV

±2 kV

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Table 9. Maximum Continuous Working Voltage

Parameter Max Unit Reference Standard

AC Voltage

Bipolar Waveform 424 V peak

Unipolar Waveform

Basic Insulation 600 V peak

Reinforced Insulation 560 V peak

DC Voltage

Basic Insulation 600 V peak

Reinforced Insulation 560 V peak

1

Refers to continuous voltage magnitude imposed across the isolation

barrier. See the Insulation Lifetime section for more details.

50-year minimum
lifetime

Maximum approved
working voltage per
IEC 60950-1 (pending)

Maximum approved
working voltage per
IEC 60950-1 and
VDE V 0884-10
(pending)

Maximum approved
working voltage per
IEC 60950-1(pending)

Maximum approved
working voltage per
IEC 60950-1 and
VDE V 0884-10
(pending)

ESD CAUTION

1

Rev. 0 | Page 6 of 20