Product category:
Circuit Protection Devices
News Release from: Optek Technology | Subject: OPI1270 Series
Edited by the Electronicstalk Editorial
Team on 07 April 2006
Analogue isolators boast high noise
immunity
Axial analogue isolators combine visible red LED emitters and a phototransistor detectors housed in separate opaque moulded plastic housings and coupled by shrouded optical cables.
Providing design engineers with the ability to transmit data from one high voltage potential to another at varying distances, TT electronics Optek Technology has developed an axial optical isolator designed to provide electrical isolation and data transfer Designated the OPI1270 Series axial analogue isolator, the device consists of a visible red LED emitter and a phototransistor detector housed in separate opaque moulded plastic housings and coupled by a shrouded optical cable that gives the device extremely high noise immunity
This article was originally published on Electronicstalk on 31 May 2005 at 8.00am (UK)
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The isolators are offered with standard lengths of 32, 40 and 80mm, and can be produced in custom lengths up to 10m or longer.
"The OPI1270 Series devices were designed for applications that require high voltage isolation between input and output or transmission of a signal from one location to another on the same or adjacent PC board", said Roland Chapa, Optek Technology's Assemblies Business Unit director.
"The heavy-duty opaque housing and shrouded cable shields the optical signal from dust, dirt, oil and other particles, making the isolator ideal for contaminated environments".
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The OPI1270 Series isolators are connected by a flexible optical cable in standard device lengths of 32, 40 or 80mm.
With this design, the emitter does not have to be precisely optically aligned with the sensor housing, Chapa explained.
Applications for the OPI1270 Series isolator include industrial, medical and office equipment, as well as electrical isolation circuits in harsh environments.
The OPI1270 Series isolators are rated for a minimum of 20kV isolation for the 32mm device, and carry a power dissipation rating of 100mW.
The AlInGaP LED (emitter) emits red light with a peak wavelength of 645nm, with on-state collector current ranging from 0.9 to 1.5V (forward current 20mA) and maximum collector dark current of 80mA (reverse voltage 3.0V).
The phototransistor (sensor) exhibits a maximum collector current of 50mA (VCE=10V, EE=0).
Minimum collector-emitter breakdown voltage is 33V, and minimum emitter-collector breakdown voltage is 5.5V (both measured at 100mA, EE=0).
The current transfer ratio for the device is typically 10% with a LED current of 20mA.
The operating temperature range is -20 to +85C, and the device is also compatible with high temperature soldering processes of 260C.
The OPI1270 Series isolators are RoHS-compliant.
Optek will also produce devices to meet customer requirements, including custom electrical specifications, as well as special connectors or cabling configurations.
Typical pricing for the OPI1270-032 isolator starts at $4.97 each in quantities of 1000 pieces, with samples available immediately.
Production quantity lead times, if stock is not available, are from 6 to 8 weeks.
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