Reflective Surface Mount Optical Encoder AEDR-8300-1Wx smallest o

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Reflective Surface Mount Optical Encoder AEDR-8300-1Wx smallest o

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AEDR-8300-1Wx Encoders
Reflective Surface Mount Optical Encoder
AEDR-8300-1Wx smallest optical encoder employing reflective technology motion control purposes. encoder houses light source photo-detecting circuitry single package. AEDR-8300-1Wx offers two-channel quadrature digital outputs. Being compatible, outputs AEDR-8300-1Wx interfaced directly with most signal processing circuitries. Hence encoder provides great design-in flexibility easy integration into existing systems. AEDR-8300-1Wx could yields encoding resolution lines inch (LPI) which 8.35 lines AEDR-8300-1Wx provides motion sensing competitive cost, making ideal high volume applications. small size surface mount package make ideal many consumer products, particularly where space weigh primary design constraint.
Features
Reflective technology Surface mount leadless package channel quadrature outputs direction sensing compatible output Single 3.3V supply -20°C 85°C absolute operating temperature Encoding resolution: (lines/inch) 8.35 (lines/mm)
Applications
Ideal high volume applications: Printers Copiers Card readers Scanners Cameras Motor Solutions Automated Wheel-chair Vending Machines Servo Systems AMachines Textile Machines Industrial Sewing Machines Consumer Product Applications
Theory Operation
AEDR-8300-1Wx combines emitter detector single surface mount leadless package. When used with codewheel linear codestrip, encoder translates rotary linear motion into digital outputs. seen block diagram, AEDR-83001Wx consists three major components: light emitting diode (LED) light source, detector consisting photodiodes lens focus light beam from emitter well light falling detector.
Definitions
State Width (S): number electrical degrees between transition Channel neighboring transition Channel There states cycle, each nominally 90°e. State Width Error (S): deviation state width, electrical degree, from ideal value 90°e. Phase number electrical degrees between center high state Channel center high state Channel Nominally 90°e. Phase Error deviation phase, electrical degree, from ideal value 90°e.
CODEWHEEL CODESTRIP
Block Diagram AEDR-8300-1Wx
VLED SIGNAL PROCESSING CIRCUITRY
Pulse Width (P): duration high state output, electrical degree, within cycle. Nominally 180°e half cycle. Pulse Width Error (P): deviation pulse width, electrical degree, from ideal value 180°e. Count (N): number window pair revolution (CPR) codewheel. linear codestrip, defined number window pair unit length (lines inch [LPI] lines [LPmm]). Cycle (C): electrical degrees (°e). Equivalent window pair.
operation encoder based principle optics where detector photodiodes sense absence presence light. this case, rotary/ linear motion object being monitored converted equivalent light pattern codewheel/codestrip. shown above diagram, reflective area (window) codewheel codestrip) reflects light back photodetector whereas light reflected non-reflective area (bar). alternating light dark patterns corresponding window fall photodiodes codewheel rotates. moving light pattern exploited detector circuitry produce digital outputs representing rotation codewheel. When codewheel coupled motor, encoder outputs then direct representation motor rotation. same concept applies codestrip detect linear motion.
Shaft Rotation: mechanical degrees. Also equivalent counts (codewheel only). Line Density: number window pair unit length, expressed either lines inch (LPI) lines (LPmm). Optical radius (Rop): distance between codewheel center centerline between domes encoder. (G): distance from surface encoder surface codewheel codestrip. Radial Tangential Misalignment Error (ER, ET): rotary motion, mechanical displacement radial tangential directions relative nominal alignment. Angular Misalignment Error Angular displacement encoder relative tangential line. Specular Reflectance (Rf): amount incident light reflected surface. Quantified terms percentage incident light. spectrometer used measure specular reflectance surface (contact factory more information).
Output waveform
FOUR STATES MAINTAINED
AMPLITUDE
CODEWHEEL ROTATION LINEAR MOVEMENT
RADIAL ANGULAR TANGENTIAL
AEDR-8300-1Wx
AEDR-8300-1Wx
SHAFT
SHAFT
CODEWHEEL
CODEWHEEL
Absolute Maximum Ratings
Storage Temperature, Operating Temperature, Supply Voltage, Output Voltage, Output Current Channel, IOUT -40°C 85°C -20°C 85°C -0.5 -0.5 -1.0 Human Body Model JESD22-A114-A Class Machine Model JESD22-A115-A Class
Notes: Exposure extreme light intensity (such from flashbulbs spotlights) cause permanent damage device. CAUTION: advised that normal static precautions should taken when handling encoder order avoid damage and/or degradation induced ESD. Proper operation encoder cannot guaranteed maximum ratings exceeded.
Recommended Operating Conditions
Parameter Temperature Supply Voltage Current Load Capacitance Count Frequency
Symbol Minimum ILED
Typical
Maximum ±0.38 (±0.015) ±0.38 (±0.015)
Units (in.) (in.) deg. deg. (in.)
Notes Ripple 100mVp-p Note Pull-Up Note
Radial Misalignment
Tangential Misalignment Angular Misalignment Codewheel/strip tilt Codewheel/strip (0.04) (0.08)
±1.5 (0.10)
Notes: Current Limiting Resistor: 5.0V, recommended series resistor 220W (±10 3.3V, recommended series resistor 110W Count frequency velocity (rpm) Data collected based Avago production characterization.
Encoding Characteristics
Encoding characteristics over recommended operating condition mounting conditions.
Parameter Pulse Width Error (Ch.A, Ch.B) Phase Error Symbol Typical Maximum Unit
Note: Typical values represent encoder performance typical mounting alignment, whereas maximum values represent encoder performance across range recommended mounting tolerance.
Electrical Characteristics
Characteristics over recommended operating conditions 25°C.
Parameter Detector Supply Current High Level Output Voltage Level Output Voltage Rise Time Fall Time Symbol Minimum Typical Maximum Unit Notes 3.3V -0.2mA 8.0mA 25pF 2.7k
Recommended Codewheel Codestrip Characteristics
Parameter Window/bar Ratio Window/bar Length Specular Reflectance
Symbol Ww/Wb
Minimum 1.80 (0.071)
Maximum 2.31 (0.091) lines/mm (lines/inch)
Unit (inches)
Notes
Reflective area. note reflective area
Line Density Optical radius
LPmm (LPI)
8.35 (212)
Recommended value
Notes: Measurements from µScan meter. Contact factory more information. Contact factory more information compatibility codewheel/strip.
Current Limiting Resistor
resistor limit current required. recommended value resistor should placed series between supply device (VLED). This will result current approximately 3.3V voltage supply used, corresponded resistance would
Moisture Sensitive Level
AEDR-8300-1Wx specified moisture sensitive level (MSL)
Outline Drawing
Chamfer
Detector Emitter
View Bottom View
Side View
Notes: dimensions millimeter. Tolerance X.XX 0.15mm. ease reference, chamfer incorporated detector side (pin shown above diagram.
Encoder Configuration
Encoder option AEDR-8300-1Wx Pin2 Pin3 VLED Pin4 Pin5 Pin6
Encoder Orientation
AEDR-8300-1Wx designed such that both detector should placed parallel window/ orientation, shown. such, encoder tolerant against radial play 0.38mm. emitter side (pins should placed closer rotating shaft.
Mounting Consideration
Codewheel/codestrip
11.00 (0.433
Direction Codewheel Rotation
With emitter side (pins encoder placed closer codewheel centre, Channel leads Channel when codewheel rotates anti-clockwise vice versa.
ANTI-CLOCKWISE EMITTER LEADS LEADS EMITTER
CLOCKWISE
Viewed from
Recommended Land Pattern AEDR-8300-1Wx
0.72 0.94 Mounting Center
1.96
1.08
Note: shaded areas leads soldering.
Note: shaded areas encoder pin-outs. They electrically grounded physically exposed. layout with tracks running across these areas should avoided.
Recommended Lead-free Reflow Soldering Temperature Profile
TEMPERATURE SEC. SEC. MAX. SEC.
TIME (SEC.) HEAT SOLDER PASTE SOLDER REFLOW COOL DOWN
Preheat Temperature Temperature maintain above Peak Temperature Time above
Note: treatment high temperature, AEDR-8300-1Wx compound turn yellow after reflow.
Resolution Indicator
Since encoder small imprint resolution marking package, color-coding package employed differentiate resolutions.
Resolution (LPI) Color
Light Amber
Ordering Information
AEDR-8300 Option
Shipping Units 1000
Note: Encoders packed tape quantity 1000pcs, 500pcs 100pcs.
product information complete list distributors, please site:
www.avagotech.com
Avago, Avago Technologies, logo trademarks Avago Technologies, Limited United States other countries. Data subject change. Copyright 2006 Avago Technologies Pte. rights reserved. AV01-0178EN June 2006

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