adm483ar-reel Analog Devices, Inc., adm483ar-reel Datasheet

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adm483ar-reel

Manufacturer Part Number
adm483ar-reel
Description
5 V Low Power, Slew-rate Limited Rs-485/rs-422 Transceiver
Manufacturer
Analog Devices, Inc.
Datasheet
FEATURES
EIA RS-485/RS-422-compliant
Data rates up to 250 kbps
Slew-rate limited for low EMI
100 nA supply current in shutdown mode
Low power consumption (120 µA)
Up to 32 transceivers on one bus
Outputs high-z when disabled or powered off
–7 V to +12 V bus common-mode range
Thermal shutdown and short-circuit protection
Pin-compatible with MAX483
Specified over –40°C to +85°C temperature range
Available in 8-lead SOIC package
APPLICATIONS
Low power RS-485 applications
EMI sensitive systems
DTE-DCE interfaces
Industrial control
Packet switching
Local area networks
Level translators
GENERAL DESCRIPTION
The ADM483 is a low power differential line transceiver suitable
for half-duplex data communication on multipoint bus trans-
mission lines. It is designed for balanced data transmission, and
complies with EIA Standards RS-485 and RS-422.The part
contains a differential line driver and a differential line receiver.
Both share the same differential pins, with either the driver or
the receiver being enabled at any given time.
The device has an input impedance of 12 kΩ, allowing up to
32 transceivers on one bus. Since only one driver should be
enabled at any time, the output of a disabled or powered-down
driver is three-stated to avoid overloading the bus. This high
impedance driver output is maintained over the entire
common-mode voltage range from –7 V to +12 V.
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.
5 V Low Power, Slew-Rate Limited
The receiver contains a fail-safe feature that results in a logic
high output state if the inputs are unconnected (floating).
The driver outputs are slew-rate limited to reduce EMI and data
errors caused by reflections from improperly terminated buses.
Excessive power dissipation caused by bus contention or by
output shorting is prevented by a thermal shutdown circuit.
The part is fully specified over the industrial temperature range,
and is available in an 8-lead SOIC package.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
RS-485/RS-422 Transceiver
FUNCTIONAL BLOCK DIAGRAM
RO
RE
DE
DI
© 2004 Analog Devices, Inc. All rights reserved.
ADM483
D
Figure 1.
R
GND
V
CC
A
B
www.analog.com
ADM483

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adm483ar-reel Summary of contents

Page 1

... The part is fully specified over the industrial temperature range, and is available in an 8-lead SOIC package. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. ADM483 A B www.analog.com ...

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ADM483 TABLE OF CONTENTS Specifications..................................................................................... 3 Timing Specifications....................................................................... 4 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Test Circuits....................................................................................... 7 Switching Characteristics ................................................................ 8 Typical Performance Characteristics ............................................. 9 REVISION HISTORY 10/04—Revision 0: Initial Version ...

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SPECIFICATIONS ± 5 unless otherwise noted MIN MAX Table 1. Parameter DRIVER Differential Output Voltage ∆ for Complementary Output States OD Common-Mode Output Voltage, ...

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ADM483 TIMING SPECIFICATIONS ± 5 unless otherwise noted MIN MAX Table 2. Parameter DRIVER Maximum Data Rate Propagation Delay PLH PHL Skew t SKEW Rise/Fall ...

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ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND CC Digital I/O Voltage (DE, RE, DI, ROUT) Driver Output/Receiver Input Voltage Operating Temperature Range Storage Temperature Range θ Thermal Impedance (SOIC) JA Lead ...

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ADM483 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 RO Receiver Output. When enabled > 200 mV, then RO = high < 200 mV, then ...

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TEST CIRCUITS V OD Figure 3. Driver Voltage Measurement 375Ω V OD3 60Ω 375Ω Figure 4. Driver Voltage Measurement over Common-Mode Voltage Range A R LDIFF B Figure 5. Driver Propagation Delay TST C L1 ...

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ADM483 SWITCHING CHARACTERISTICS 3V 1.5V 1. PLH B 1/2VO SKEW PLH – PHL 5V 90% POINT 10% POINT Figure 9. Driver Propagation Delay, Rise/Fall Timing ...

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TYPICAL PERFORMANCE CHARACTERISTICS 400 350 300 250 200 150 100 50 0 –50 – TEMPERATURE ( °C) Figure 13. Supply Current vs. Temperature 0.2 0.4 ...

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ADM483 120 100 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE (V) Figure 19. Output Current vs. Driver Output Low Voltage –10 –30 –50 –70 –90 –110 0 0.5 1.0 1.5 2.0 2.5 3.0 ...

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APPLICATIONS DIFFERENTIAL DATA TRANSMISSION Differential data transmission is used to reliably transmit data at high rates over long distances and through noisy environments. Differential transmission nullifies the effects of ground shifts and noise signals that appear as common- mode voltages ...

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ADM483 THERMAL SHUTDOWN The ADM483 contains thermal shutdown circuitry that protects the part from excessive power dissipation during fault conditions. Shorting the driver outputs to a low impedance source can result in high driver currents. The thermal sensing circuitry detects ...

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... OUTLINE DIMENSIONS ORDERING GUIDE Model Temperature Range ADM483AR –40°C to +85°C ADM483AR-REEL –40°C to +85°C ADM483AR-REEL7 –40°C to +85°C ADM483JR 0°C to 70°C ADM483JR-REEL 0°C to 70°C ADM483JR-REEL7 0°C to 70°C 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2440) 4.00 (0.1574) 5.80 (0.2284) 3.80 (0.1497) ...

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ADM483 NOTES Rev Page ...

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NOTES Rev Page ADM483 ...

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... ADM483 NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05079-0-10/04(0) Rev Page ...

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