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PDF ADM2682E Data sheet ( Hoja de datos )
| Número de pieza | ADM2682E | |
| Descripción | (ADM2682E / ADM2687E) 5 kV rms Signal & Power Isolated RS-485 Transceiver | |
| Fabricantes | Analog Devices | |
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Data Sheet
5 kV rms Signal and Power Isolated
RS-485 Transceiver with ±15 kV ESD Protection
ADM2682E/ADM2687E
FEATURES
5 kV rms 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)
Data rate: 16 Mbps (ADM2682E), 500 kbps (ADM2687E)
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
UL recognition
5000 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A (pending)
IEC 60601-1: 400 V rms (basic), 250 V rms (reinforced)
IEC 60950-1: 600 V rms (basic), 380 V rms (reinforced)
VDE Certificates of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
VIORM = 846 V peak
Operating temperature range: −40°C to +85°C
16-lead wide-body SOIC with >8 mm creepage and clearance
APPLICATIONS
Isolated RS-485/RS-422 interfaces
Industrial field networks
Multipoint data transmission systems
GENERAL DESCRIPTION
The ADM2682E/ADM2687E are fully integrated 5 kV rms
signal and power isolated data transceivers with ±15 kV ESD
protection and are suitable for high speed communication on
multipoint transmission lines. The ADM2682E/ADM2687E
include an integrated 5 kV rms isolated dc-to-dc power supply
that 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-to-dc
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. C
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
FUNCTIONAL BLOCK DIAGRAM
VCC
VISOOUT
isoPower DC-TO-DC CONVERTER
OSCILLATOR
RECTIFIER
VCC
DIGITAL ISOLATION iCoupler
TxD ENCODE
REGULATOR
VISOIN
DECODE
TRANSCEIVER
D
Y
Z
DE ENCODE
DECODE
RxD
DECODE
ENCODE
A
R
B
RE ADM2682E/ADM2687E
GND1
ISOLATION
BARRIER
Figure 1.
GND2
The ADM2682E/ADM2687E drivers have an active high enable.
An active low receiver enable is also provided, which 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, 16-lead, wide-
body SOIC package with >8 mm creepage and clearance.
The ADM2682E/ADM2687E 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
AN-0971 Application Note, Recommendations for 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: 781.329.4700 ©2011–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADM2682E/ADM2687E
REGULATORY INFORMATION
Table 5. ADM2682E/ADM2687E Approvals
Organization Approval Type
UL To be recognized under the UL 1577 Component Recognition Program of Underwriters Laboratories, Inc.
Single protection, 5000 V rms isolation voltage.
In accordance with UL 1577, each ADM2682E/ADM2687E is proof tested by applying an insulation test voltage
≥ 6000 V rms for 1 second.
CSA (Pending) To be approved under CSA Component Acceptance Notice #5A.
Reinforced insulation per IEC 60601-1, 250 V rms (353 V peak) maximum working voltage.
Basic insulation per IEC 60601-1, 400 V rms (566 V peak) maximum working voltage.
Reinforced insulation per CSA 60950-1-07 and IEC 60950-1, 380 V rms (537 V peak) maximum working voltage.
Basic insulation per CSA 60950-1-07 and IEC 60950-1, 600 V rms (848 V peak) maximum working voltage.
VDE Certified according to DIN V VDE V 0884-10 (VDE 0884-10): 2006-12.
In accordance with DIN EN 60747-5-2, each ADM2682E/ADM2687E is proof tested by applying an insulation test voltage
≥1590 V peak for 1 second.
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 6.
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
Symbol
L(I01)
L(I02)
CTI
Value
5000
>8.0
>8.0
0.017 min
>175
IIIa
Unit
V rms
mm
mm
mm
V
Test Conditions/Comments
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
DIN IEC 112/VDE 0303-1
Material Group (DIN VDE 0110:1989-01, Table 1)
Rev. C | Page 5 of 24
5 Page 
Data Sheet
0
–10
–20
–30
–40
–50
–60
–70
0
1234
OUTPUT HIGH VOLTAGE (V)
5
Figure 15. Receiver Output Current vs. Receiver Output High Voltage
60
50
40
30
20
10
0
012345
OUTPUT LOW VOLTAGE (V)
Figure 16. Receiver Output Current vs. Receiver Output Low Voltage
4.75
4.74
4.73
4.72
4.71
4.70
4.69
4.68
4.67
4.66
4.65
–40
–15 10 35 60
TEMPERATURE (°C)
85
Figure 17. Receiver Output High Voltage vs. Temperature
ADM2682E/ADM2687E
0.32
0.30
0.28
0.26
0.24
0.22
0.20
–40
–15 10 35 60
TEMPERATURE (°C)
85
Figure 18. Receiver Output Low Voltage vs. Temperature
B
A
1
RxD
3
CH1 2.0V CH2 2.0V
CH3 2.0V
M10.00ns
A CH1 2.56V
Figure 19. ADM2682E Receiver Propagation Delay
A
B
1
RxD
3
CH1 2.0V CH2 2.0V
CH3 2.0V
M10.00ns
A CH1 2.56V
Figure 20. ADM2687E Receiver Propagation Delay
Rev. C | Page 11 of 24
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet ADM2682E.PDF ] | |
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