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ADM3491, ADM3491A-1, ADM3491AR-1

Table of contents:
Info of ADM3491
Info of ADM3491A-1
Info of ADM3491AR-1

ADM3491, ADM3491A-1, ADM3491AR-1 Selling Leads, Datasheet

MFG:ADI Package Cooled:N/A D/C:09+

ADM3491, ADM3491A-1, ADM3491AR-1 Picture

ADM3491, ADM3491A-1, ADM3491AR-1 Datasheet download

Five Points

Part Number: ADM3491

MFG: ADI

Package Cooled: N/A

D/C: 09+

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ADM3491 General Description

The ADM3491 is a low power differential line transceiver designed to operate using a single +3.3 V power supply. Low power consumption coupled with a shutdown mode make it ideal for power sensitive

ADM3491 Maximum Ratings

V_CC . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . +7 V
Inputs
Driver Input (DI) . . . . . . . . . .. . . . . . . . . . .0.3 V to VCC + 0.3 V
Control Inputs (DE, RE) . . . . . . . . . . . . . . .0.3 V to VCC + 0.3 V
Receiver Inputs (A, B) . . . . . . . . .. . . . . . . . . . 7.5 V to +12.5 V
Outputs
Driver Outputs . . . . . . . . . . . . . . . . . . . .. . . . . 7.5 V to +12.5 V
Receiver Output . . . . . . . . . . . . . . . . . .. . 0.5 V to VCC +0.5 V
Power Dissipation 14-Lead DIP . . . . . . . . . . . . . . . . . . . 800 mW
JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . 140°C/W
Power Dissipation 14-Lead SOIC . . . . . . . . . . . . . . . . . . 650 mW
JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . 115°C/W
Power Dissipation 16-Lead TSSOP . . . . . . . . . .. . . . . . . 500 mW
JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . 158 °C/W
Operating Temperature Range
Industrial (A Version) . . . . . . . . . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . . .. . . 65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . .. . . . . . . . . .+300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . .. . .. . . . . . . .+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . .+220°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . >2 kV
EFT Rating (IEC1000-4-4) . . . . . . . . . . . . . . .. . . . . . . . . . . >1 kV

ADM3491 Features

Operates with +3.3 V Supply
EIA RS-422 and RS-485 Compliant Over Full CM Range
19 k Input Impedance
Up to 50 Transceivers on Bus
20 Mbps Data Rate
Short Circuit Protection
Specified Over Full Temperature Range
Thermal Shutdown
Interoperable with 5 V Logic
840 A Supply Current
2 nA Shutdown Current
Also Available in TSSOP Package
Meets IEC1000-4-4 (>1 kV)
8 ns Skew
Upgrade for MAX 3491, SN75ALS180

ADM3491 Typical Application

The ADM3491 is a low power differential line transceiver designed to operate using a single +3.3 V power supply. Low power consumption coupled with a shutdown mode make it ideal for power sensitive applications. It is suitable for communication on multipoint bus transmission lines.

It is intended for balanced data transmission and complies with both EIA Standards RS-485 and RS-422. It contains a differential line driver and a differential line receiver, making it suitable for full duplex data transfer.

The input impedance is 19 kW allowing up to 50 transceivers to be connected on the bus.

Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit.

This feature forces the driver output into a high impedance state if, during fault conditions, a significant temperature increase is detected in the internal driver circuitry.

The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating). The ADM3491 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM3491 is fully specified over the industrial temperature range and is available in DIP and SOIC packages as well as a new space saving TSSOP package.

ADM3491 Connection Diagram

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