US Digital

AEDR Reflective Optical Encoder Modules

Overview

  • Reflective technology
  • Surface mount SO-6 package
  • Two channel quadrature outputs for direction sensing
  • Available in four encoding resolutions
  • Small size
  • TTL compatible
  • Single +5V supply

The AEDR encoder module uses reflective technology to sense rotary or linear position. This sensor consists of an LED light source and a photodetector IC in a single surface mount package. When used with a reflective codewheel or codestrip, this device...

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Product Specifications

ParameterMin.Typ.Max.UnitsNotes
Temperature 0 25 85 C
Supply Voltage 4.5 5.0 5.5 Volts Ripple (<100mV P-P)
LED Current 13 15 18

Load Capacitance - - 100 pF 2.7K-ohms Pull-up
Count Frequency - - 60 kHz Velocity (rpm) x N/60
Angular Misalignment - 0 1.5 deg.
Codewheel / Codestrip Tilt - 0 1 deg.
Codewheel / Codestrip Gap 1.00
0.04		 2.00
0.08		 2.50
0.10		 mm
in.
Radial Misalignment -
-		 -
-		 0.38
0.015		 mm
in.
Tangential Misalignment -
-		 -
-		 0.38
0.015		 mm
in.
  • Specifications apply over entire operating temperature range.
  • Values are for the worst error over a full rotation.
ParameterTyp.Max.Units
Symmetry Error (Ch. A, Ch. B) - 8300-K 15, 25 55, 75 e
Symmetry Error (Ch. A, Ch. B) - 8300-P, 8300-Q, 8300-W 16 75 e
Quadrature Error - 8300-K 12 60 e
Quadrature Error - 8300-P, 8300-Q, 8300-W 10 60 e
Parameter Min. Typ. Max. Units Notes
Detector Supply Current - 2.2 5.0 mA
High Level Output Voltage 2.4 - - V IOH = -2.00 mA
Low Level Output Voltage - - 0.4 V IOL = 8.00 mA
Rise Time - 500 - ns CL = 25pF, RL = 2.7kOhm
Fall Time - 100 - ns
  • Specifications apply over entire operating temperature range.
  • Values are for the worst error over full rotation.

phase_relationship.gif

timing_diagram_2.gif

CPR (N):
   The number of Cycles Per Revolution.
One Shaft Rotation:
   360 mechanical degrees, N cycles.
One Electrical Degree (e):
   1/360th of one cycle.
One Cycle (C):
   360 electrical degrees (e). Each cycle can be decoded into 1, 2, or 4 codes, referred
   to as X1, X2, or X4 resolution multiplication.
Symmetry:
   A measure of the relationship between (X) and (Y) in electrical degrees, nominally
   180e.
Quadrature (Z):
   The phase lag or lead between channels A and B in electrical degrees, nominally 90e.
Position Error:
   The difference between the actual shaft position and the position indicated by the
   encoder cycle count.
Cycle Error:
   An indication of cycle uniformity. The difference between an observed shaft angle
   which gives rise to one electrical cycle, and the nominal angular increment of 1/N of
   a revolution.

Product Description

Restriction of Hazardous Substances

The AEDR encoder module uses reflective technology to sense rotary or linear position. This sensor consists of an LED light source and a photodetector IC in a single surface mount package. When used with a reflective codewheel or codestrip, this device can sense rotary or linear position.

The reflective surface mount optical encoders provide two square wave outputs in quadrature for count and direction information.These TTL compatible outputs correspond to the alternating reflective/non-reflective pattern of the codewheel or codestrip.

The AEDR reflective optical encoder modules are available in four resolutions of 75, 150, 180, and 212 LPI (lines per inch).

Product Notes
  • US Digital warrants its products against defects in materials and workmanship for two years. See complete warranty for details.
Related Documentation

Purchasing

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Product Part Number
Quantity Price
1 $7.25
10 $6.35
50 $5.72
100 $5.20
Over 100 Call for quote
Quantity
Unit Price

$7.25

Subtotal

$7.25

For your convenience, use the above part number to order via phone 800.736.0194