ADM3485EAR
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Analog Devices Inc. ADM3485EAR

Manufacturer No:
ADM3485EAR
Manufacturer:
Analog Devices Inc.
Package:
Tube
Description:
IC TRANSCEIVER HALF 1/1 8SOIC
Delivery:
Payment:
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Product Introduction

Overview

The ADM3485EAR is a 3.3 V, low power half-duplex transceiver designed by Analog Devices Inc. for use in multipoint bus transmission lines. This device is compliant with TIA/EIA standards RS-485 and RS-422, making it suitable for balanced data transmission. It features separate enable inputs for the driver and receiver, allowing for flexible control over the communication interface. The ADM3485EAR is packaged in an 8-lead narrow SOIC package and is fully specified over the industrial temperature range, ensuring reliability in various environmental conditions.

Key Specifications

ParameterMinTypMaxUnitTest Conditions/Comments
Supply Voltage (VCC)3.03.33.6V
Data Rate1215Mbps
Differential Output Delay (tDD)12235nsRL = 60 Ω, CL1 = CL2 = 15 pF
Differential Output Transition Time (tTD)31125nsRL = 60 Ω, CL1 = CL2 = 15 pF
Propagation Delay From Low to High Level (tPLH)72335ns
ESD Protection (A, B Pins)±15 kVHuman body model
ESD Protection (All Pins Except A, B)±4 kVHuman body model
Shutdown Current (ISHDN)0.0021µADE = 0 V, RE = VCC, DI = 0 V or VCC
Receiver Input Impedance12
Common-mode Input Range-712V

Key Features

  • TIA/EIA RS-485/RS-422 compliant
  • ±15 kV ESD protection on RS-485 input/output pins
  • Half-duplex transceiver with separate enable inputs for driver and receiver
  • Up to 32 nodes on the bus
  • Receiver open-circuit, fail-safe design ensuring logic high output when inputs are floating
  • Low power shutdown current
  • Outputs high-Z when disabled or powered off
  • Thermal shutdown and short-circuit protection
  • Industry-standard 75176 pinout
  • 8-lead narrow SOIC package

Applications

  • Power/energy metering
  • Telecommunications
  • EMI-sensitive systems
  • Industrial control
  • Local area networks

Q & A

  1. What is the primary function of the ADM3485EAR?
    The ADM3485EAR is a half-duplex transceiver designed for balanced data transmission on multipoint bus transmission lines, complying with TIA/EIA standards RS-485 and RS-422.
  2. What is the maximum data rate of the ADM3485EAR?
    The maximum data rate of the ADM3485EAR is 15 Mbps.
  3. How many nodes can be connected on the bus using the ADM3485EAR?
    Up to 32 nodes can be connected on the bus.
  4. What type of ESD protection does the ADM3485EAR offer?
    The ADM3485EAR offers ±15 kV ESD protection on RS-485 input/output pins and ±4 kV on all other pins.
  5. What is the common-mode input range of the ADM3485EAR?
    The common-mode input range is from -7 V to +12 V.
  6. Does the ADM3485EAR have thermal protection?
    Yes, the ADM3485EAR features thermal shutdown and short-circuit protection.
  7. In what package is the ADM3485EAR available?
    The ADM3485EAR is available in an 8-lead narrow SOIC package.
  8. What are some typical applications of the ADM3485EAR?
    Typical applications include power/energy metering, telecommunications, EMI-sensitive systems, industrial control, and local area networks.
  9. How does the receiver fail-safe feature work?
    The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating.
  10. What is the shutdown current of the ADM3485EAR?
    The shutdown current (ISHDN) is between 0.002 µA and 1 µA when DE = 0 V, RE = VCC, and DI = 0 V or VCC.

Product Attributes

Type:Transceiver
Protocol:RS422, RS485
Number of Drivers/Receivers:1/1
Duplex:Half
Receiver Hysteresis:50 mV
Data Rate:10Mbps
Voltage - Supply:3V ~ 3.6V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:8-SOIC
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Same Series
ADM3485EARZ-REEL
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Similar Products

Part Number ADM3485EAR ADM3485EARZ
Manufacturer Analog Devices Inc. Analog Devices Inc.
Product Status Obsolete Active
Type Transceiver Transceiver
Protocol RS422, RS485 RS422, RS485
Number of Drivers/Receivers 1/1 1/1
Duplex Half Half
Receiver Hysteresis 50 mV 50 mV
Data Rate 10Mbps 10Mbps
Voltage - Supply 3V ~ 3.6V 3V ~ 3.6V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width) 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC 8-SOIC

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