AEDT8100OPTIONE11 [AVAGO]

Rotary Position Encoder, ROHS COMPLIANT, PLASTIC PACKAGE-8;


型号：	AEDT8100OPTIONE11
厂家：	AVAGO TECHNOLOGIES LIMITED
描述：	Rotary Position Encoder, ROHS COMPLIANT, PLASTIC PACKAGE-8
文件：	总9页 (文件大小：484K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AEDx-8xxx-xxx

2- or 3-Channel Incremental Encoder Kit with Codewheel

Data Sheet

Description

Features

The AEDx-8xxx comes in an option of two-channel or

three-channel optical incremental encoder kit with code-

wheel integrated in a protective housing. The encoder is

lead free and compliant to the RoHS directive. Each en-

coder kit consists of a collimated LED source and a detec-

tor IC enclosed within a small plastic package.

• 3-channel diﬀerential output (A,B) with ungated, gated-

90 ° and gated-180 ° index pulse (I)

• 2-channel diﬀerential output available

• Up to 500 Cycles Per Revolution (CPR)

• Up to 30000 rpm motor speed

• -40 °C to 100 °C operating temperature

• Single 5 V supply

The AEDx-8xxx optical encoder has two-channel quadra-

ture outputs (A,B) plus a third channel index output (I).

There are three index options available. i.e. ungated, gat-

ed-90 ° and gated-180 ° electrical degree index pulse.

• Integrated RS-422 line driver

• Quick and easy assembly

The AEDx-8xxx series optical encoder is designed for use

with motors with shaft diameters of 2mm and up to 5mm.

The quadrature, index and power supplied to the encoder

are accessed through an 8-pin male connector of 1.25 mm

pitch.

Assembly View

Housing

The AEDx-8xxx solution enables the servo system to be

more compact. With the aid of alignment jig, the assembly

process will also require less alignment time, thus making

the assembly process much easier for servo motor inte-

gration.

Applications

Sensor Chassis

The AEDx-8xxx provides motion detection for DC servo

motor and closed loop stepper motor feedback system in

the following applications:

• Pick and Place machines

Codewheel & Hub

Baseplate

• Semiconductor equipment

• Factory automation equipment

Note: Avago Technologies encoders are not recommended for use in safety critical applications, e.g., ABS braking sys-

tems, power steering, life support systems and critical care medical equipment. Avago’s products and software are not

speciﬁcally designed, manufactured or authorized for sale as parts, components or assemblies for the planning, con-

struction, maintenance or direct operation of a nuclear facility or for use in medical devices or applications. Customers

are solely responsible, and waive all rights to make claims against Avago or its suppliers, for all losses, damage, expense

or liability in connection with such use. Please contact your local sales representative if more clariﬁcation is needed.

Theory of Operation

Deﬁnitions

The AEDx-8xxx optical encoder is a housed solution with Cycles (N): The number of electrical cycles per revolution

integrated encoder and codewheel. The encoder trans- (CPR).

lates the rotary motion of a shaft into incremental digital

Note: CPR refers to the raw signal from encoder, that is

outputs.

the cycles before 4x decode.

The encoder contains a single Light Emitting Diode (LED)

as the light source. The light is collimated into a parallel

One Cycle: 360 electrical degrees (°e).

beam by means of polycarbonate lens located directly

over the LED. Opposite the emitter is a detector IC. This

IC consists of multiple sets of photo detectors and signal

processing circuitry necessary to produce the digital wave-

form output. The codewheel rotates between the emitter

and detector, causing the light beam to be interrupted by

pattern of spaces and bars on the codewheel. The Photo-

diodes that detect these interruptions are arranged in a

pattern that corresponds to the radius and design of the

codewheel. These detectors are also spaced in such way

that light period on one pair of detectors corresponds to

dark period on adjacent pair of detectors. The photodiode

outputs are then fed through the signal processing circuit-

One Shaft Rotation: 360 mechanical degrees.

Cycle Error (∆C): An indication of cycle uniformity. The dif-

ference between an observed shaft angle which gives

rise to one electrical cycle, and the nominal angular

increment of 1/N of a revolution.

Pulse Width (P): The number of electrical degrees that an

output is high during 1 cycle. This value is nominally

180°e or 1/2 cycle.

Pulse Width Error (∆P): The deviation, in electrical degrees,

of the pulse width from its ideal value of 180°e.

ry that produce the ﬁnal outputs for channel A and B. Due State Width (S): The numbers of electrical degrees be-

to this integrated phasing technique, the digital output of tween transitions in the output of channel A and the

channel A is in quadrature with that of channel B (90 elec- neighboring transition in the output of channel B. There

trical degrees out of phase). As a standard, the outputs are

fed through a standard RS422 line driver to deliver the dif-

ferentials signals at the ﬁnal encoder output.

are 4 states per cycle, each nominally 90°e.

State Width Error (∆S): The deviation, in electrical degrees,

of each state width from its ideal value of 90°e.

Phase (Φ): The numbers of electrical degrees between

the center of the high state of channel A and the center

of the high state of channel B. This value is nominally

90°e for quadrature output.

Phase Error (∆φ): The deviation of the phase from its ideal

value of 90°e.

Index Pulse Width (Po): The number of electrical degrees

that an index is high with reference to channel A or

channel B during one full shaft rotation.

[1,2]

Absolute Maximum Ratings

Parameter

Symbol Min.

Max.

Units

° C

1. Storage Temperature AEDS Series

Storage Temperature AEDT Series

2. Supply Voltage

T_S

-20

-40

-0.5

T_S

100

Vcc

Vout

Iout

3. Output Voltage

Vcc

4. Output Current per Channel

5. Shaft Axial Play

150

0.100 mm

0.080 mm

6. Shaft Radial Play Plus Eccentricity

Note:

1. Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the

device should be operated at these limits.

2. Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to absolute maximum

rating conditions for extended periods may aﬀect reliability.

Recommended Operating Conditions

Parameter

Symbol Min.

Typ.

Max.

Units

Notes

1. Operating Temperature AEDS Series

T_A

-20

-40

4.5

° C

Operating Temperature AEDT Series

2. Supply Voltage

T_A

100

5.5

° C

V_cc

5.0

kHz

3. Output frequency ( 200 CPR)

4. Output frequency ( 400 & 500 CPR)

100

200

Velocity(rpm) x N/60

Encoding Characteristics (Vcc = 4.5 to 5.5V, Tamb = -40 to +100°C)

AEDx-8xxx-Exx (200 CPR only)

Parameter

Symbol Min.

Typ.(3)

Max

Units

Notes

1. Pulse Width Error

∆P

∆S

∆φ

∆C

∆Θ

°e

2. State Width Error

°e

3. Phase Error

°e

4. Cycle Error

°e

5. Index Pulse Width Un-gated

Index Pulse Width Gated 90°e

Index Pulse Width Gated 180°e

6. Position Error

220

140

360

180

500

120

220

°e

min. of arc

Note 3: Typical values speciﬁed at Vcc = 5.0V and 25°C

Encoding Characteristics (Vcc = 4.5 to 5.5V, Tamb = -40 to +100°C)

AEDx-8xxx-xxx (400 & 500CPR)

Parameter

Symbol Min.

Typ.(3) Max

Units

Notes

1. Pulse Width Error

∆P

∆S

∆φ

∆C

∆Θ

°e

2. State Width Error

°e

3. Phase Error

°e

4. Cycle Error

°e

5. Index Pulse Width Un-gated

Index Pulse Width Gated 90°e

Index Pulse Width Gated 180°e

6. Position Error

220

135

360

180

500

130

225

°e

min. of arc

Note 3: Typical values speciﬁed at Vcc = 5.0V and 25°C

Electrical Characteristics (V = 4.5 to 5.5V, T = -40 to +100°C)

amb

[1]

Parameter

Symbol

Min.

Typ.

Max

Units

Notes

1. Supply Current

2. Output High Level

3. Output Low Level

4. Output Current

5. Rise time

I_CC

V_OH

V_OL

I_O

2.5

3.4

0.3

Io = -20mA

Io = 20mA

0.5

t_r

100

6. Fall time

t_f

Note:

1. Typical values speciﬁed at Vcc = 5.0V and 25°C.

Pin Assignments

Signal

GND

A+

A-

Description

Pin 1

Pin 2

Pin 3

Pin 4

Pin 5

Pin 6

Pin 7

Pin 8

Ground

Digital Output

Voltage Input

B+

B-

I+

I-

Vcc

Output Waveforms

2.5 V

0.5 V

CH. A

CH. B

2.5 V

0.5 V

2.5 V

0.5 V

CH. I

Gated 180°e

CH. I-

2.5 V

0.5 V

2.5 V

0.5 V

CH. I

Gated 90°e

CH. I-

2.5 V

0.5 V

2.5 V

0.5 V

CH. I

Ungated

CH. I-

2.5 V

0.5 V

CH. A-

2.5 V

0.5 V

CH. B-

2.5 V

0.5 V

Figure 1. Output waveforms for counter-clockwise rotation, viewed from the top of the encoder.

Direction of Motor Rotation

Direction of Rotation: When the codewheel rotates in the counter-clockwise direction viewing from the top of the en-

coder kit, channel A will lead channel B. If the codewheel rotates in the opposite direction, channel B will lead channel

Electrical Interface

26LS31

Note:

OUTPUT+ represents A+, B+, or I+ digital output from the encoder.

OUTPUT- represents A-, B-, or I- digital output from the encoder.

Load resistance *RT is optional although highly recommended to reduce reﬂection.

Package Dimensions

Dimensions in mm unless otherwise stated.

Tolerance: +/- 0.1mm

Figure 2. Mechanical Dimensions for Mounting Option 1 (AEDx-8x0x)

Dimensions in mm unless otherwise stated.

Tolerance: +/- 0.1mm

Figure 3. Mechanical Dimensions for Mounting Option 2 (AEDx-8x1x)

Mounting Considerations

Option 2 (AEDx-8x1x) with Internal Mounting Hole

Option 1 (AEDx-8x0x) with Protruded External Mounting Ear Hole

CAUTION: For optimal performance, base plate and plastic housing assembly are

designed for a ONE time assembly process only. Removal and re-assembly process

should be avoided due to the potential weakness of the latch after re-assembly.

Mounting Alignment Tool

Alignment Tool for AEDX-8XXX,4mm (HEDS-8938-011)

Ø4.010^+0.010

Ø10.400 0.00ꢀ

front1

0.ꢀ

0.3

SECTION A-A

Alignment Tool for AEDX-8XXX,5mm(HEDS-8938-014)

Øꢀ.010^+0.010

Ø10.400 0.00ꢀ

front1

0.ꢀ

0.3

SECTION A-A

Mechanical Characteristics

Parameter

Dimension

Tolerance

Units

Notes

1. Shaft Diameter Tolerance

2, 3, 4, 5

-0.008

2. Recommended Shaft Length

3. Mounting Screw Size

5 to 10

2 X M2

0.6

N/A

0.1

4. Recommended Screw Torque

5. Encoder Base Plate Thickness

lb. inch

3.85

Recommended Mating Connectors

Temperature Option

Manufacturer

Part Number

Description

AEDS Series

Molex

53261-0871

Connector Box Type,

8-pin, 1.25mm pitch

AEDT Series

Hirose

DF13A-8P-1.25H

Connector Box Type,

8-pin, 1.25mm pitch

Tinned OD = 0.7mm(Max)

Tinned L = 2± 0.ꢀmm

AEDS-Series (HEDS-8911-152)

Speciﬁcation:

1. Housing, 8P, pitch: 1.25mm

2. Terminal, #26~28AWG

3. Wire, UL1007 #28AWG-STR

4. Blue color

1ꢀ2± ±.0mm

VIEW

Tinned OD = 0.7mm(Max)

Tinned L = 2± 0.ꢀmm

AEDT-Series (HEDT-8912-152)

Speciﬁcation:

1. Housing, 8P, pitch: 1.25mm

2. Terminal, #26~30AWG

3. Wire, UL1007 #28AWG-STR

4. Grey color

MATING

VIEW

1ꢀ2± ±.0mm

Ordering Information

Option

AED

Shaft Diameter

01 - 2mm

02 - 3mm

11 - 4mm

14- 5mm

Channels

Resolution Options (Cycle/Rev)

0 - 2 Channel

1 - 3 Channel

E - 200 CPR

H - 400 CPR

A - 500 CPR

Mounting Type

0 - External Ear Mounting

1 - Standard mounting

Index Gating

0 - Gated 90ºe

1 - Gated 180ºe

2 - Un-gated

Operating Temperature

S - 20ºC to 85ºC

T - 40ºC to 100ºC

Connectors ordering information:

Alignment tool ordering information:

1. HEDS-8911-152 - Connectors for AEDS-8xxx series

2. HEDT-8912-152 - Connectors for AEDT-8xxx series

1. HEDS-8938-001 - Alignment tool for AEDx-8xxx-x01

series (2mm shaft diameter option)

2. HEDS-8938-002 - Alignment tool for AEDx-8xxx-x02

series (3mm shaft diameter option)

3. HEDS-8938-011 - Alignment tool for AEDx-8xxx-x11

series (4mm shaft diameter option)

4. HEDS-8938-014 - Alignment tool for AEDx-8xxx-x14

series (5mm shaft diameter option)

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

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

AV02-1240EN - September 26, 2008

AEDT8100OPTIONE11 [AVAGO]

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