Product category:
Optoelectronic Sensors, Switches and Receivers
News Release from: Avago Technologies | Subject: AEDR-8000 series
Edited by the Electronicstalk Editorial
Team on 15 July 2005
Surface mount optical encoders go
lead-free
Agilent Technologies today introduced a series of reflective optical encoders in a lead-free surface-mount assembly.
Agilent Technologies has released a series of reflective optical encoders in a lead-free surface-mount assembly Their small dimensions - 6.2 x 4.4mm, with a choice of 3.2 or 2.7mm height - make them one of the smallest reflective encoders in the industry, and their silver-palladium (Ag-Pd) pads meet worldwide lead-free mandates
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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The AEDR-8000 series encoders also feature a -20 to +85C operating temperature range, enabling them to work in high-temperature automotive and industrial environments.
The new AEDR-8000 series reflective optical encoders offer a direct replacement for Agilent's HEDR-8000 series, which are supplied in the SO-8 package.
Agilent's AEDR-8000 series encoders are used in closed-loop motor controls in applications with severe space constraints.
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These encoders are ideal for use with small motors ranging from 8 to 23mm in diameter, with speeds not exceeding 1500rev/min.
Their miniature size and surface-mount packaging make it extremely easy to incorporate these devices in tight spaces, such as the inside of a motor case in a photocopier or directly on a printed-circuit board for storage devices, digital cameras and printers.
They're equally well-suited for automotive applications, including seat adjust and mirror control.
The AEDR-8000 series reflective encoders permit fast and easy assembly, and allow for a wide variety of designs, since they can be mounted on both flexible circuits and conventional printed circuit boards.
The new AEDR-8000 series encoders consist of one of Agilent's advanced AEDR-8300 series SO-6 solder-bump-packaged encoders mounted on a tiny printed circuit board.
Compared with the basic AEDR-8300 devices, the printed circuit assembly makes it easier to provide the optimum 1.0 to 1.5mm gap between the reflective encoder and code wheel or linear code strip.
The Agilent AEDR-8000 series reflective encoders feature an LED light source, a special photodetector IC with integrated electronics, and integrated optics.
They can be used with a reflective code wheel to sense rotary position and velocity, or with a linear code strip to sense linear position and velocity.
The devices provide either one or two-channel TTL-compatible digital outputs in quadrature, which provides both count and direction information.
They are available with encoding resolutions of 7.09 lines per millimetre (180 lines per inch), 5.91 lines per millimetre (150 lines per inch), 2.95 lines per millimetre (75 lines per inch) and 1.42 lines per millimetre (36 lines per inch).
They are insensitive to axial play and maintain performance and accuracy over a wide variation in the gap between sensor and code wheel or strip.
The encoders operate at rated performance for frequencies up to 30kHz. Request a free brochure from Avago Technologies ...
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