HEDR-8100#2P3 [AGILENT]

SINGLE, 2 CHANNELS, ROTARY/LINEAR OPTICAL POSITION ENCODER, SO-8;


型号：	HEDR-8100#2P3
厂家：	AGILENT TECHNOLOGIES, LTD.
描述：	SINGLE, 2 CHANNELS, ROTARY/LINEAR OPTICAL POSITION ENCODER, SO-8 编码器光电
文件：	总8页 (文件大小：254K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Reflective Optical Surface

Mount Encoders

Technical Data

HEDR-8000 Series

HEDR-8100 Series

HEDR-8010 Series

Features

• Reflective Technology

• Surface Mount SO-8 Package

• Two Channel Quadrature

Outputs for Direction

Sensing

• Two Encoding Resolution

Options:

– 2.76 – 2.95 Lines/mm

(70 – 75 Lines/inch)

– 5.91 Lines/mm

Description

The HEDR-8000/8100 Series

encoders use reflective technol-

ogy to sense rotary or linear

position. This sensor consists of

an LED light source and a

photodetector IC in a single SO-8

surface mount package. When

used with a reflective codewheel

or codestrip, this device can sense

rotary or linear position.

(150 Lines/inch)

Outline Drawing

GND

LED

6.2 ± 0.20

(0.244 ± 0.008)

3.94 ± 0.13 *

(0.155 ± 0.005)

1.97

(0.078)

REF.

GND

REF.

PIN ONE

INDICATOR

LOCATION

1.270

(0.050)

TYP.

0.38 ± 0.08

NOTES:

(0.016 ± 0.003)

*FLASH MAY ADD 0.38 (0.015) MAX.

AT PARTING LINE.

DIMENSIONS IN MILLIMETERS (INCHES).

FOR THE 1CHANNEL HEDR-8010, PIN 6

IS CONSIDERED NC.

5.08 ± 0.13 *

(0.200 ± 0.005)

1.84

REF.

1.40 ± 0.02

(0.055 ± 0.001)

(0.072)

0.025

(0.001)

MIN.

3.18 ± 0.13

(0.125 ± 0.005)

0.23 ± 0.03

(0.009 ± 0.001)

1.52

(0.06)

REF.

0.18 ± 0.08

(0.007 ± 0.003)

0.700 R

REF.

0.051

(0.002)

LEAD COPLANARITY ±

0.59

(0.023)

(0.0276)

MIN.

ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC

DISCHARGE.

The reflective surface mount

optical encoders provide two

square wave outputs in quadra-

ture for count and direction

information. These TTL

compatible outputs correspond to

the alternating reflective/non-

reflective pattern of the

it ideal for high volume

As seen in the block diagram, the

HEDR-8000/8100 series has three

key parts: a single light emitting

diode (LED) light source, a

photodetector IC with a set of

uniquely configured photodiodes,

and a pair of lenses molded into

the package. The lens over the

LED focuses light onto the

applications. Its small size and

surface mount capability make it

ideal for printers, copiers, card

readers, and consumer product

applications.

Note: Agilent Technologies

encoders are not recommended

for use in safety critical

applications. Eg. ABS braking

systems, power steering, life

support systems and critical care

medical equipment. Please

contact sales representative if

more clarification is needed.

codewheel or codestrip.

codewheel or codestrip. Light is

either reflected or not reflected

back to the lens over the

The HEDR-8000/8100 series

encoders can be used over a

range of codewheel and codestrip

resolutions. The HEDR-8000/

8100 reflective encoder can

operate from 2.76 to 2.95 lines

per mm (70 to 75 lines per inch).

The HEDR-8100 can be used with

a codewheel or codestrip with

150 lines per inch (5.91 lines

per mm).

photodetector IC.

As the codewheel rotates or

codestrip passes by, an alternat-

ing pattern of light and dark

corresponding to the pattern of

the codewheel falls upon the

photodiodes. This light is used to

produce internal signals A and A,

and B and B. As part of this

“push-pull” detector system, these

signals are fed through compara-

tors to produce the final outputs

for channels A and B.

Theory of Operation

The HEDR-8000/8100 series

combines an emitter and a

detector in a single surface mount

SO-8 package. When used with a

codewheel or codestrip, the

reflective sensors translates

rotary or linear motion into a two

channel digital output.

Applications

The HEDR-8000/8100 series

provides two channel motion

sensing at a very low cost, making

Block Diagram

LED

GND

CODEWHEEL

CODESTRIP

CH A

CH B

SIGNAL

PROCESSING

CIRCUITRY

GND

Definitions

Pulse Width (P): The number of

electrical degrees that an output

is high during one cycle,

Phase (φ): The number of

electrical degrees between the

center of the high state on channel

A and the center of the high state

on channel B. This value is

nominally 90°e.

Count (N): For rotary motion,

the number of bar and window

pairs or counts per revolution

(CPR) of the codewheel. For

linear motion, the number of bar

and window pairs per unit length

(lines per inch [LPI] or lines per

mm [LPmm]).

nominally 180°e or 1/2 a cycle.

Pulse Width Error (∆P): The

deviation in electrical degrees of

the pulse width from its ideal

value of 180°e.

Phase Error (∆φ): The deviation

in electrical degrees of the phase

from its ideal value of 90°e.

State Width (S): The number of

electrical degrees between a

transition in the output of channel

A and the neighboring transition in

the output of channel B. There are

4 states per cycle, each nominally

90°e.

One Cycle (C): 360 electrical

degrees (°e), 1 bar and window

pair.

Direction of Rotation: When the

codewheel or codestrip moves in

the direction from pin 1 to pin 4,

as viewed when looking down on

the lenses, channel B will lead

channel A. If the codewheel or

codestrip moves in the opposite

direction, channel A will lead

channel B.

One Shaft Rotation: 360

mechanical degrees, N cycles

(rotary motion only).

State Width Error (∆S): The

deviation in electrical degrees of

each state width from its ideal

value of 90°e.

Line Density: The number of

reflective and non-reflective pairs

per unit length, expressed as

either lines per inch (LPI) or lines

per mm (LPmm).

Optical Radius (Rop): For rotary

motion, the distance from the

codewheel’s center of rotation to

the center line connecting the two

lenses of the encoder.

RADIAL

Gap (G): The distance from the

top of the package to the surface of

the reflective codewheel or

codestrip.

TANGENTIAL

HEDR-8000

Specular Reflectance (R_f): a

measure of a surface’s reflective

finish. This is quantified by the

amount of light reflected when hit

with an incident beam. A device

called a scatterometer is used to

quantify specular reflectance on a

percent scale. (Contact factory for

more information.)

SHAFT

CODEWHEEL

Output Waveforms

ALL FOUR STATES (S1 TO S4)

ARE MAINTAINED.

Radial and Tangential

Misalignment Error (E_R, E_T):

For rotary motion, mechanical

misalignment in the radial and

tangential directions relative to the

codewheel.

CH. A

AMPLITUDE

CH. B

Angular Misalignment Error

(E_A): angular misalignment of the

sensor in relation to the tangential

direction. This applies for both

rotary and linear motion.

CODEWHEEL ROTATION OR LINEAR MOVEMENT

Absolute Maximum Ratings

Storage Temperature, T_S

Operating Temperature, T_A

Supply Voltage, V_CC

-40°C to 85°C

-10°C to 85°C

-0.5 V to 7 V

Output Voltage, V_O

-0.5 V to V_CC

Output Current per Channel, I_OUT

-1.0 mA to 5 mA

Note: Exposure to extreme light intensity (such as from flashbulbs or spotlights) can

cause permanent damage to device.

Recommended Operating Conditions

Parameter

Temperature

Symbol

T_A

Min.

-10

4.5

Typ.

Max.

Units

°C

Notes

Supply Voltage

LED Current

V_CC

I_LED

5.0

5.5

Volts

Ripple < 100 mVp-p

See “Current Limiting

Resistor for LED”

Load Capacitance

Count Frequency

Radial Misalignment

C_L

E_R

100

± 0.38

kHz

2.7 KΩ Pull-Up

Velocity (rpm) x N/60

(± 0.015)

(in.)

Tangential Misalignment

Angular Misalignment

Codewheel or Codestrip

Gap

E_T

± 0.38

(± 0.015)

± 1.5

2.54

(in.)

deg.

E_A

2.03

1.52

HEDR-8000

HEDR-8010

(0.060) (0.080) (0.100)

(in.)

R_f

C_T

1.02 1.52 2.03

(0.040) (0.060) (0.080)

60%

(in.)

HEDR-8100

Codewheel or Codestrip

Specular Reflectance

Codewheel/Codestrip Tilt

As Measured on TMA

µscan Scope (see Note 1)

deg.

Codewheel/Codestrip

Resolution

LPmm

(LPI)

2.76

(70)

2.95

(75)

lines/mm HEDR-8000

(lines/in.) HEDR-8010

LPmm

(LPI)

5.91

150

lines/mm HEDR-8100

(lines/in.)

Notes:

1. Contact factory for more information regarding measurement of specular reflectance.

Encoding Characteristics

Encoding Characteristics Over the Recommended Operating Conditions and Mounting Conditions.

Parameter

Pulse Width Error

Pulse Width Error (Ch.A,Ch.B)

Phase Error

Pulse Width Error (Ch.A,Ch.B)

Phase Error

Symbol

∆P

Typical

15,25

Maximum

Units

°e

Notes

55,75

HEDR-8010

HEDR-8100

HEDR-8000

∆P

∆φ

∆P

∆φ

°e

Electrical Characteristics

Electrical Characteristics Over Recommended Operating Conditions. Typical Values at 25°C.

Parameter

Supply Current

Symbol

I_CC

Min.

Typ.

Max.

Units

Notes

2.2

5.0

High Level Output Voltage

Low Level Output Voltage

Rise Time

V_OH

V_OL

2.4

I_OH= -40 µA min.

0.4

I_OL= 3.86 mA

t_r

150

200

C_L= 25 pF

R_L= 2.7 KΩ

Fall Time

t_f

Current Limiting Resistor

for LED

A resistor to limit current to the

LED is required. The recom-

mended value is 220 Ω (± 10%)

and should be placed in series

between the 5 V supply and pin 8

of the device (V_LED). This will

result in an LED current of

approximately 15 mA.

Recommended Codewheel and Codestrip Characteristics

Parameter

Window/Bar Ratio

Symbol

Ww/Wb

R_f

Min.

0.9

Max.

1.1

Units

Notes

Specular Reflectance

Reflective Bars

–

Non-reflective Bars

Line Density

LPmm

(LPI)

2.76

(70)

2.95

(75)

lines/mm

(lines/inch)

HEDR-8000

HEDR-8010

LPmm

(LPI)

5.91

(150)

lines/mm

(lines/inch)

HEDR-8100

Window Length

1.80

2.31

mm (inches)

(0.071)

(0.091)

(inches)

Contact factory for further information on compatible codewheel and codestrips.

Mounting Conditions

IR Soldering Conditions

1. 150 ± 10°C for 90 ± 30 seconds

2. Greater than 200°C for 30

± 10 seconds

The following recommended IR

soldering profile meets the

specifications of the Electronic

Industries Association of Japan

(EIAJ):

3. 230°C ± 5°C for 10 ± 1 second

30 ± 10 S

10 ± 1 S

11.00 mm (0.433 IN.) < R

< ∞

235°C MAX.

2.03 ± 0.51

(0.080 ± 0.020)

230°C ± 5°C

200°C

90 ± 30 S

150°C ± 10°C

*These dimensions are for HEDR-8000.

Please refer to “Recommended Operating

Conditions” table for HEDR-8100.

TIME (S)

RECOMMENDATION: Please refer to

Application Note 1079: Design and

Performance Considerations with

HEDR-8000 for additional product

information.

Ordering Information

A. Modules

OPT 2

HEDR-8

Resolution Type

Lines/Inch

Units in Shipping Tube

0 = 50 units

2 = 3 units (Designers kit)

3 = 100 units

0 = Low resolution

1 = High resolution

K = 75 LPI

P = 150 LPI

Q = 180 LPI

4 = 1500 units

5 = 500 units

HEDR-8000#2K

HEDR-8100#2P

HEDR-8100#2Q

HEDR-8010#2K

B. Codewheel: reflective

HEDR-5120 OPT

ROP = 11 mm, 2 channels

Shaft Diameter

Resolution (Cycle/Rev)

E = 200 CPR

H = 408 CPR

06 = 1/4 in.

1/2 = 6 mm

06 12

HEDR-5120#

www.agilent.com/semiconductors

For product information and a complete list of

distributors, please go to our web site.

For technical assistance call:

Americas/Canada: +1 (800) 235-0312 or

(408) 654-8675

Europe: +49 (0) 6441 92460

China: 10800 650 0017

Hong Kong: (+65) 6271 2451

India, Australia, New Zealand: (+65) 6271 2394

Japan: (+81 3) 3335-8152(Domestic/Interna-

tional), or 0120-61-1280(Domestic Only)

Korea: (+65) 6271 2194

Malaysia, Singapore: (+65) 6271 2054

Taiwan: (+65) 6271 2654

Data subject to change.

Obsoletes 5988-4214EN

January 16, 2003

5988-5310EN

HEDR-8100#2P3 [AGILENT]

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