Features

• Reflective technology

• Surface mount small outline leadless package

• Direct replacement of HEDR-8000 encoder

• Single channel incremental output

• Two channels quadrature outputs for direction

• Single 5 V supply, TTL compatible output

• -20°C to 85°C absolute operating temperature

Description

By introducing an additional PCB top-up thickness at-

tached to the encoder, the AEDR-8000 Encoder series

could easily solve the height issue in various applica-

tions. Furthermore, this great feature is enhanced with

the offering of different height profile options.

Direct Replacement of HEDR-8000 Encoder series is now

possible with the AEDR-8000 Encoder series. Such migra-

tion is always simple and easy due to the perfect match-

ing of the height profiles as well as same footprints in

both encoder series.

The AEDR-8000 Encoder series employs reflective tech-

nology for rotary and linear movement control. The en-

Applications

The AEDR-8000 Encoder series provides motion sensing

at a competitive price, making it ideal for high volume

applications. Its small size and surface mount package

make it ideal for printers, copiers, card readers and many

consumer products, particularly where space and weight

are design constraints.

Note: All specifications are subject to change without prior notification.

AEDR-8000 Series

Reflective Surface Mount Optical Encoder

in electrical degrees, within one cycle. Nominally 180°e

or half a cycle.

Pulse Width Error (DP): The deviation of pulse width, in

electrical degrees, from its ideal value of 180°e.

Count (N): The number of window and bar pairs per revo-

lution (CPR) of codewheel. For linear codestrip, defined

as the number of window and bar pairs per unit length

(lines per inch [LPI] or lines per mm [LPmm]).

One Cycle (C): 360 electrical degrees (°e). Equivalent to

one window and bar pair.

wheel center and the centerline between the two domes

of the encoder.

Gap (G): The distance from the surface of the encoder to

the surface of codewheel or codestrip.

Specular Reflectance (Rf): The amount of incident light

reflected by a surface. Quantified in terms of the per-

centage of incident light. A spectrometer can be used to

measure specular reflectance of a surface (contact fac-

tory for more information).

Radial and Tangential Misalignment Error (ER, ET): For ro-

a detector in a single surface mount leadless package.

When used with a codewheel or linear codestrip, the en-

coder translates rotary or linear motion into digital out-

puts. As seen in the block diagram, the AEDR-8000 En-

coder series consists of three major components: a light

emitting diode (LED) light source, a detector IC consist-

ing photodiodes, and lens to focus light beam from the

emitter as well as light falling on the detector.

The operation of the encoder is based on the principle of

optics where the detector photodiodes sense the absence

tion of an object being monitored is converted to equiv-

dark pattern, corresponding to the window and bar, falls

on the photodiodes as the codewheel rotates. The mov-

ing light pattern is exploited by the detector circuitry to

produce digital outputs representing the rotation of the

codewheel. When the codewheel is coupled to a motor,

the encoder outputs are then a direct representation of

the motor rotation. The same concept applies to the use

of a codestrip to detect linear motion.

Definitions

State Width (S): The number of electrical degrees be-

tween a transition in Channel A and the neighboring

transition in Channel B. There are 4 states per cycle, each

nominally 90°e.

State Width Error (DS): The deviation of state width, in

electrical degrees, from its ideal value of 90°e.

state of Channel B. Nominally 90°e.

Storage Temperature, TS -40°C to 85°C

Operating Temperature, TA -20°C to 85°C

Supply Voltage, VCC -0.5 V to 7 V

Output Voltage, VO -0.5 V to VCC

Output Current per Channel, IOUT -1.0 mA to 8 mA

ESD Human Body Model JESD22-A114-A Class 2

Machine Model JESD22-A115-A Class B

Notes:

1. Exposure to extreme light intensity (such as from flashbulbs or spotlights) may cause permanent damage to the device.

2. CAUTION: It is advised that normal static precautions should be taken when handling the encoder in order to avoid damage and/or degrada-

Recommended Lead-Free Reflow Soldering Temperature Profile

Preheat Temperature 40°C to 125°C = 120 sec. max.

Temperature Maintain Above 217°C = 60 – 150 sec.

Peak Temperature = 255 ± 5°C

LPI 75 150 180

Color Clear Red Amber

AEDR-8 0 Option

PCB Thickness Number of Packaging Lines per Inch Shipping Units

0 - 1.5 mm (Low Channels 1 - Tape and K - 75 LPI 0 - 1000 pcs

Resolution) 1 - One Channel Reel P - 150 LPI 1 - 500 pcs

1 - 1.0 mm (High 0 - Two Channels Q - 180 LPI 2 - 100 pcs

AEDR-8000 * * * *

AEDR-8010 * *

AEDR-8100 * * * *

AEDR-8100 * * *

For product information and a complete list of distributors, please go to our website: www.avagotech.com

Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.

Data subject to change. Copyright © 2005-2009 Avago Technologies. All rights reserved. Obsoletes 5989-3067EN

AV02-0971EN - August 27, 2009