ISO3082DWR

1 Features

1• Meets or Exceeds TIA/EIA RS-485 Requirements

• Signaling Rates up to 20 Mbps

• 1/8 Unit Load – Up to 256 Nodes on a Bus

• Thermal Shutdown Protection

• Low Bus Capacitance – 16 pF (Typical)

• 50 kV/μs Typical Transient Immunity

• Fail-safe Receiver for Bus Open, Short, Idle

• 3.3-V Inputs are 5-V Tolerant

• Bus-Pin ESD Protection

– 12-kV HBM Between Bus Pins and GND2

– 6-kV HBM Between Bus Pins and GND1

• Safety-Related Certifications:

– 4000-VPK Basic Insulation, 560 VPK VIORM per

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

2006-12 and DIN EN 61010-1

– 2500 VRMS Isolation per UL 1577

– 4000 VPK Isolation per CSA Component

Acceptance Notice 5A and IEC 60950-1

2 Applications

• Security Systems

• Chemical Production

• Factory Automation

• Motor and Motion Control

• HVAC and Building Automation Networks

• Networked Security Stations

3 Description

The ISO3080 and ISO3086 devices are isolated fullduplex differential line drivers and receivers while the

ISO3082 and ISO3088 devices are isolated halfduplex differential line transceivers for TIA/EIA

485/422 applications.

These devices are ideal for long transmission lines

because the ground loop is broken to allow for a

much larger common-mode voltage range. The

symmetrical isolation barrier of the device is tested to

provide 2500 VRMS of isolation for 60 s per UL 1577

between the bus-line transceiver and the logic-level

interface.

Any cabled I/O can be subjected to electrical noise

transients from various sources. These noise

transients can cause damage to the transceiver

and/or nearby sensitive circuitry if they are of

sufficient magnitude and duration. These isolated

devices can significantly increase protection and

reduce the risk of damage to expensive control

circuits.

The ISO3080, ISO3082, ISO3086, and ISO3088

device are qualified for use from –40°C to +85°C.