HEDS-8940 Avago Technologies US Inc., HEDS-8940 Datasheet - Page 3

• Manufacturer Part Number: HEDS-8940
• Description: Align Tool For M-Aries
• Manufacturer: Avago Technologies US Inc.

Specifications of HEDS-8940

• Accessory Type: Mechanical Alignment Tool
• Product: Tools & Accessories
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: AEDA-3200 Series
• For Use With: AEDA-3200-TBK - IC ENCODER HI-RES 3CH 7500CPRAEDA-3200-TBJ - IC ENCODER HI-RES 3CH 7200CPRAEDA-3200-TB7 - IC ENCODER HI-RES 3CH 6000CPRAEDA-3200-TB1 - IC ENCODER HI-RES 3CH 5000CPRAEDA-3200-TAJ - IC ENCODER HI-RES 3CH 2500CPR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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Theory of Operation
The AEDA-3200 translates rotary motion of a shaft into a
three channel digital output. The AEDA-3200 series has
five key parts: a single light emitting diode (LED) light
source, a photodetector IC with a set of uniquely config-
ured photodiodes, an interpolator IC, a line driver IC and
a pair of lenses.
This light is used to produce internal signals A and A
and B and B
Output Waveforms
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.
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,
As part of the “push-pull” detector system, these signals
are fed through comparators and line driver that are part
of the signal processing circuitry to produce the final
outputs for channels A.
The AEDA-3200 is available for cycles per revolution (CPR)
of 2500 to 7500. This translates to a maximum resolution
of 30000 counts after quadrature decode (4X).