HEDR-81002P0 [AVAGO]
Reflective Optical Surface Mount Encoders; 反射光表面安装编码器
| 型号： | HEDR-81002P0 |
| 厂家： | 
AVAGO TECHNOLOGIES LIMITED |
| 描述： | Reflective Optical Surface Mount Encoders |
| 文件： | 总8页 (文件大小：430K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HEDR-8000 Series
Reflective Optical Surface Mount Encoders
DataSheet
HEDR-8000 Series,HEDR-8100 Series
HEDR-8010 Series
Features
Description
• Reflective technology
The HEDR-8000/8100 Series encoders use reflective
technology 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 rotaryor linear position.
• 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
(150 lines/ inch)
NOTE: HEDR-8000 series products are classified
as MSL Level 3.
Outline Drawing
8
7
6
5
1
2
3
4
NC
GND
A
V
8
7
6
5
LED
NC
6.2 ± 0.20
(0.244 ± 0.008)
3.94 ± 0.13 *
(0.155 ± 0.005)
B
1.97
(0.078)
REF.
V
GND
REF.
CC
1
2
3
4
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: Avago 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
V
LED
GND
R
CODEWHEEL
OR
CODESTRIP
V
CC
CH A
CH B
SIGNAL
PROCESSING
CIRCUITRY
GND
2
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.
E
A
TANGENTIAL
HEDR-8000
HEDR-8000
Specular Reflectance (Rf): 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
SHAFT
CODEWHEEL
CODEWHEEL
Output Waveforms
C
ALL FOUR STATES (S1 TO S4)
ARE MAINTAINED.
Radial and Tangential
P
Misalignment Error (ER, ET):
For rotary motion, mechanical
misalignment in the radial and
tangential directions relative to the
codewheel.
CH. A
φ
S1
S2
S3
S4
AMPLITUDE
CH. B
Angular Misalignment Error
(EA): angular misalignment of the
sensor in relation to the tangential
direction. This applies for both
rotary and linear motion.
CODEWHEEL ROTATION OR LINEAR MOVEMENT
3
Absolute Maximum Ratings
Storage Temperature, T
-40°C to 85°C
-10°C to 85°C
-0.5 V to 7 V
S
Operating Temperature, T
A
Supply Voltage, V
CC
Output Voltage, V
-0.5 V to V
O
CC
Output Current per Channel, IOUT
-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
Symbol
Min.
-10
4.5
Typ.
Max.
85
Units
°C
Notes
Temperature
Supply Voltage
LED Current
T
A
V
CC
5.0
15
5.5
18
Volts
mA
Ripple < 100 mVp-p
ILED
13
See “Current Limiting
Resistor for LED”
Load Capacitance
Count Frequency
Radial Misalignment
CL
f
100
15
pF
2.7 KΩ Pull-Up
kHz
Velocity (rpm) x N/ 60
ER
±0.38
(±0.015)
mm
(in.)
Tangential Misalignment
ET
±0.38
(±0.015)
mm
(in.)
Angular Misalignment
EA
G
0
±1.5
deg.
Codewheel or Codestrip
Gap
1.52
(0.060)
2.03
2.54
mm
(in.)
HEDR-8000
HEDR-8010
(0.080) (0.100)
1.52 2.03
(0.060) (0.080)
G
1.02
(0.040)
mm
(in.)
HEDR-8100
Codewheel or Codestrip
Specular Reflectance
R
f
60%
As Measured on TMA
µscan Scope (see Note 1)
Codewheel/ Codestrip Tilt
CT
0
1
deg.
Codewheel/ Codestrip
Resolution
LPmm
(LPI)
2.76
(70)
2.95
(75)
lines/ mm
(lines/ in.)
HEDR-8000
HEDR-8010
LPmm
(LPI)
5.91
150
lines/ mm
(lines/ in.)
HEDR-8100
Note:
1. Contact factory for more information regarding measurement of specular reflectance.
Encoding Characteristics
Encoding Characteristics over the Recommended Operating Conditions and Mounting Conditions.
Parameter
Symbol
∆P
Typical
15
Maximum
Units
°e
Notes
Pulse Width Error
Pulse Width Error (Ch.A,Ch.B)
Phase Error
55
HEDR-8010
HEDR-8100
HEDR-8100
HEDR-8000
HEDR-8000
∆P
16
75
°e
∆f
10
60
°e
Pulse Width Error (Ch.A,Ch.B)
Phase Error
∆P
15,25
12
55,75
60
°e
∆f
°e
Note:
Typical Value was obtained at typical condition. Maximums were obtained over all range of recommended operating condition and mounting condition.
4
Electrical Characteristics
Electrical Characteristics over Recommended Operating Conditions. Typical Values at 25°C.
Parameter
Symbol
Min.
Typ.
Max.
Units
mA
V
Notes
Supply Current
ICC
2.2
5.0
High Level Output Voltage
Low Level Output Voltage
Rise Time
V
OH
2.4
IOH = -40 µA min.
V
OL
0.4
V
IOL = 3.86 mA
tr
150
50
200
ns
CL = 25 pF
RL = 2.7 KΩ
Fall Time
tf
60
ns
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 (VLED). This will
result in an LED current of
approximately 15 mA.
Recommended Codewheel and Codestrip Characteristics
W
b
W
w
L
w
R
OP
L
w
W
W
b
w
Parameter
Symbol
Min.
0.9
60
Max.
1.1
85
Units
Notes
Window/ Bar Ratio
Specular Reflectance
Ww/ Wb
R
f
Reflective Bars
–
10
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)
7.09
(180)
lines/ mm
(lines/ inch)
HEDR-8100
Window Length
Lw
1.80
2.31
mm (inches)
mm
(0.071)
(0.091)
(inches)
Contact factory for further information on compatible codewheel and codestrips.
5
Mounting Conditions
IR Soldering Conditions
1. 150 ± 10°C for 90 ± 30 seconds
The following recommended IR
soldering profile meets the
specifications of the Electronic
Industries Association of Japan
(EIAJ):
2. Greater than 200°C for 30
± 10 seconds
1
2
3
4
8
7
6
5
3. 230°C ± 5°C for 10 ± 1 second
30 ± 10 S
R
OP
10 ± 1 S
235°C MAX.
11.00 mm (0.433 IN.) < R
< ∞
*
OP
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 w ith HEDR-8000
for additional product
information.
6
Ordering Information
A. Modules
OPT 2
HEDR-8
00
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
0
2
*
*
3
*
*
4
*
*
*
5
HEDR-8000# 2K
*
*
HEDR-8100# 2P
HEDR-8100# 2Q
HEDR-8010# 2K
*
*
*
B. Codew heel: 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#
E
H
*
*
In order to achieve the reflective
codewheel resolution stated, refer
below for suitable encoder
recommendation.
1. HEDR-5120# Exx, 200CPR to
be used with option K, 75LPI of
the encoder.
2. HEDR-5120# Hxx, 408CPR to
be used with option P, 150LPI of
the encoder.
7
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, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved. Obsoletes 5988-5310EN
5988-9452EN May 9, 2006
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