Description

The FOD8012A is a half duplex, bi−directional, high−speed logic

gate Optocoupler, which supports isolated communications allowing

digital signals to communicate between systems without conducting

ground loops or hazardous voltages. It utilizes onsemi’s patented

coplanar packaging technology, OPTOPLANAR®, and optimized IC

design to achieve minimum 20 kV/s Common Mode Noise Rejection

(CMR) rating.

This high−speed logic gate optocoupler is highly integrated with 2

optically coupled channels arranged in bi−directional configuration,

and housed in a compact 8−pin small outline package. Each

optocoupler channel consists of a high−speed AlGaAs LED driven by

a CMOS buffer IC coupled to a CMOS detector IC. The detector IC

comprises of an integrated photodiode, a high−speed trans−impedance

amplifier and a voltage comparator with an output driver. The CMOS

technology coupled to the high efficiency of the LED achieves low

power consumption as well as very high speed (60 ns propagation

delay, 15 ns pulse width distortion).

Features

• Half Duplex, Bi−Directional

• 20 kV/s Minimum Common Mode Rejection

• High Speed:

♦ 15 Mbit/s Date Rate (NRZ)

♦ 60 ns Maximum Propagation Delay

♦ 15 ns Maximum Pulse Width Distortion

♦ 30 ns Maximum Propagation Delay Skew

• 3.3 V and 5 V CMOS Compatibility

• Extended Industrial Temperate Range, −40 to +110°C Temperature

Range

• Safety and Regulatory Approvals:

♦ UL1577, 3750 VACRMS for 1 min.

♦ DIN EN/IEC60747−5−5 (approval pending)

Applications

• Industrial Fieldbus Communications

♦ DeviceNet, CAN, RS485

• Microprocessor System Interface

♦ SPI, I2C

• Programmable Logic Control

• Isolated Data Acquisition System

• Voltage Level Translator