ISO3086TDW Description

The primary power for an isolation transformer is provided by the integrated oscillator outputs of the isolated differential line transceiver known as the ISO3086T. This full-duplex differential line transceiver for RS-485 and RS-422 applications can be quickly set up to operate in half-duplex mode by connecting pins 11 and 12 to pins 14 and 13, respectively. These components are perfect for lengthy transmission lines because they break the ground loop to enable a significantly wider common-mode voltage range. Between the bus-line transceiver and the logic-level interface, the device's symmetrical isolation barrier is tested to offer 4242 VPK of isolation for 1 minute per VDE.

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 near-by 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 ISO3086T is specified for use from –40°C to 85°C.

ISO3086TDW Features

Meets or Exceeds TIA/EIA-485-A

Signaling Rate up to 20 Mbps

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

Thermal Shutdown Protection

Typical Efficiency > 60% (ILOAD = 100 mA) -

see SLUU469

Low Bus Capacitance 7 pF (Typ)

50-kV/µs Typical Transient Immunity

Fail-safe Receiver for Bus Open, Short, Idle

Logic Inputs are 5-V Tolerant

Bus-Pin ESD Protection

ISO3086TDW Applications

Temperature Measurement

Pressure Measurement

Flow Meters

Factory Automation and Process Control