AEDR-8300-P1 [AVAGO]
SINGLE, 2 CHANNELS, ROTARY/LINEAR OPTICAL POSITION ENCODER, LEADLESS, SO-6;
| 型号： | AEDR-8300-P1 |
| 厂家： | 
AVAGO TECHNOLOGIES LIMITED |
| 描述： | SINGLE, 2 CHANNELS, ROTARY/LINEAR OPTICAL POSITION ENCODER, LEADLESS, SO-6 编码器 |
| 文件： | 总10页 (文件大小：147K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AEDR-8300 Series Encoders
Reflective Surface Mount Optical Encoder
Data Sheet
Description
Features
• Reflective technology
The AEDR-8300 series is the smallest optical encoder
employing reflective technology for motion control
purposes. The encoder houses an LED light source and
a photo-detecting circuitry in a single package.
• Surface mount small outline leadless package
• Single channel incremental output
• Two channel quadrature outputs for direction sensing
• TTL compatible output
The AEDS-8300 series offers options of either single
channel or two-channel quadrature digital outputs.
Being TTL compatible, the outputs of the AEDR-8300
series can be interfaced directly with most of the signal
processing circuitries. Hence the encoder provides great
design-in flexibility and easy integration into existing
systems. The AEDR-8300 series is available in four reso-
lutions, namely 36, 75, 150 and 180 lines per inch (LPI)
(1.42, 2.95, 5.91 and 7.09 lines per mm respectively).
This range of resolutions caters for different design and
application needs.
• Single 5V supply
• -20oC to 85oC absolute operating temperature
• Encoding resolution options:
36, 75, 150, 180 (lines/inch) or 1.42, 2.95, 5.91, 7.09
(lines/mm)
Applications
The AEDR-8300 series provides motion sensing at a
competitive cost, making it ideal for high volume appli-
cations. Its small size and surface mount package make
it ideal for printers, copiers, card readers and many con-
sumer products, particularly where space and weigh are
design constraint.
Note: All specifications are subject to change without prior notification.
Theory of Operation
Definitions
The AEDR-8300 series combines an emitter and a detec-
State Width (S): The number of electrical degrees be-
tor in a single surface mount leadless package. When tween a transition in Channel A and the neighboring
used with a codewheel or linear codestrip, the encoder
translates rotary or linear motion into digital outputs.
As seen in the block diagram, the AEDR-8300 consists
of three major components: a light emitting diode (LED)
light source, a detector IC consisting photodiodes and
lens to focus light beam from the emitter as well as light
falling on the detector.
transition in Channel B. There are 4 states per cycle,
each nominally 90oe.
State Width Error (∆S): The deviation of state width, in
electrical degree, from its ideal value of 90oe.
Phase (φ): The number of electrical degrees between
the center of high state of Channel A and the center of
high state of Channel B. Nominally 90oe.
The operation of the encoder is based on the principle
of optics where the detector photodiodes sense the ab- Phase Error (∆φ): The deviation of phase, in electrical
sence and presence of light. In this case, the rotary/lin- degree, from its ideal value of 90oe.
ear motion of an object being monitored is converted
Pulse Width (P): The duration of high state of the out-
to equivalent light pattern via the use of codewheel/
put, in electrical degree, within one cycle. Nominally
codestrip. As shown in the above diagram, the reflective
180oe or half a cycle.
area (window) of the codewheel (or codestrip) reflects
light back to the photodetector IC, whereas no light is
Pulse Width Error (∆P): The deviation of pulse width, in
reflected by the non-reflective area (bar). An alternating electrical degree, from its ideal value of 180oe.
light and dark patterns corresponding to the window
Count (N): The number of window and bar pair per rev-
and bar fall on the photodiodes as the codewheel ro-
olution (CPR) of codewheel. For linear codestrip, defined
tates. The moving light pattern is exploited by the de-
as the number of window and bar pair per unit length
tector circuitry to produce digital outputs representing
(lines per inch [LPI] or lines per mm [LPmm]).
the rotation of the codewheel. When the codewheel is
coupled to a motor, the encoder outputs is then a direct One Cycle (C): 360 electrical degrees (oe). Equivalent to
representation of the motor rotation. The same concept
applies to the use of a codestrip to detect linear motion.
one window and bar pair.
V
LED
R
CODEWHEE
OR
CODESTRIP
L
GND
V
CC
CH A
CH B
SIGNAL
PROCESSING
CIRCUITRY
GND
Figure 1. Block Diagram of AEDR-8300.
2
One Shaft Rotation: 360 mechanical degrees. Also Specular Reflectance (Rf): The amount of incident light
equivalent to N counts (codewheel only).
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
factory for more information).
Line Density: The number of window and bar pair per
unit length, expressed in either lines per inch (LPI) or
lines per mm (LPmm).
Radial and Tangential Misalignment Error (ER, ET): For
rotary motion, mechanical displacement in the radial
and tangential directions relative to the nominal align-
ment.
Optical radius (Rop): The distance between the code-
wheel center and the centerline between the two
domes of the encoder.
Gap (G): The distance from surface of the encoder to
the surface of codewheel or codestrip.
Angular Misalignment Error (EA): Angular displace-
ment of the encoder relative to the tangential line.
C
ALL FOUR STATES (S1 TO S4)
ARE MAINTAINED.
P
CH. A
CH. B
φ
S1
S2
S3
S4
AMPLITUDE
CODEWHEEL ROTATION OR LINEAR MOVEMENT
RADIAL (E )
R
ANGULAR (E )
A
TANGENTIAL (E )
T
AEDR-8300
AEDR-8300
SHAFT
SHAFT
CODEWHEEL
CODEWHEEL
3
AEDR-8300 Absolute Maximum Ratings
Storage Temperature, TS
Operating Temperature, TA
Supply Voltage, VCC
-40°C to 85°C
-20°C to 85°C
-0.5 V to 7 V
-0.5 V to VCC
Output Voltage, VO
Output Current per Channel, IOUT -1.0 mA to 8 mA
ESD
Human Body Model JESD22-A114-A Class 2
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-
tion induced by ESD.
3. Proper operation of the encoder cannot be guaranteed if the maximum ratings are exceeded.
AEDR-8300 Recommended Operating Conditions
Parameter
Sym.
Min.
Typ.
Max.
Units
Notes
Temperature
TA
-20
4.5
13
25
5
85
°C
Supply Voltage
LED Current
VCC
ILED
CL
f
5.5
18
V
Ripple< 100mVp-p
See note 1
15
mA
pF
kHz
Load Capacitance
Count Frequency
100
30
2.7 ký Pull-Up
AEDR-83X0-K/P/Q
See Note 2
Count Frequency
f
15
kHz
AEDR-8310-V
Radial Misalignment
ER
0.38 ( 0.015)
mm (in.)
mm (in.)
deg.
Tangential Misalignment ET
0.38 ( 0.015)
1.5
Angular Misalignment
Codewheel/strip tilt
Codewheel/strip Gap
Note:
EA
CT
G
0
0
1
deg.
1.0 (0.04) 2.0 (0.08) 2.5 (0.10)
mm (in.)
1. Refer to “LED Current Limiting Resistor”in Page 6.
2. Count frequency = velocity(rpm)xN/60.
4
AEDR-8300 Encoding Characteristics
Encoding characteristics over the recommended operating condition and mounting conditions.
Parameter
Symbol
Typical
Maximum
Units
Notes
Pulse Width Error
∆P
15
16
55
75
°e
°e
AEDR-8310-K
AEDR-8310-V
Pulse Width Error
(Ch.A, Ch. B)
∆P
∆P
∆P
15, 25
16
16
55, 75
75
75
°e
°e
°e
AEDR-8300-K
AEDR-8300-P
AEDR-8300-Q
Phase Error
∆φ
∆φ
∆φ
12
10
10
60
60
60
°e
°e
°e
AEDR-8300-K
AEDR-8300-P
AEDR-8300-Q
Note:
1. Typical values represent the encoder performance at typical mounting alignment, whereas the maximum values represent the encoder
performance across the range of recommended mounting tolerance.
AEDR-8300 Electrical Characteristics
Characteristics over recommended operating conditions at 25°C.
Parameter
Sym.
Min.
Typ.
Max.
Units
Notes
Detector Supply Current
High Level Output Voltage
Low Level Output Voltage
Rise Time
ICC
VOH
VOL
tr
2.2
5.0
mA
V
2.4
IOH = –0.2 mA
0.4
V
IOL = 8.0 mA
500
100
ns
ns
CL = 25 pF, RL = 2.7 kW
CL = 25 pF, RL = 2.7 kW
Fall Time
tf
AEDR-8300 Encoder Pin Configuration
Encoder option
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
AEDR-8310-K/V
NC
Gnd
Gnd
VLED
VLED
Gnd
Gnd
Ch A
Ch A
Vcc
Vcc
AEDR-8300-K/P/Q
Ch B
5
Recommended Codewheel and Codestrip Characteristics
W
b
W
w
L
w
R
OP
L
w
W
W
b
w
Parameter
Symbol
Min.
Max.
Unit
Notes
Window/bar Ratio
Window/bar Length
Ww/Wb
0.9
1.1
LW
Rf
1.80 (0.071)
2.31 (0.091)
mm (inches)
Spectular Reflectance
60
85
Reflective area. See note 1.
Non-reflective area
—
10
Line Density
LPmm (LPI)
LPmm (LPI)
LPmm (LPI)
LPmm (LPI)
1.42 (36)
2.95 (75)
5.91 (150)
7.09 (180)
1.42 (36)
2.95 (75)
5.91 (150)
7.09 (180)
lines/mm (inch) AEDR-8310-V
lines/mm (inch) AEDR-8310-K, AEDR-8300-K
lines/mm (inch) AEDR-8300-P
lines/mm (inch) AEDR-8300-Q
Optical Radius
Notes:
Rop
11
11
mm
Recommended value
1. Measurements from spectrometer. Contact factory for more information.
2. Contact factory for more information on compatibility of codewheel/strip.
LED Current Limiting Resistor
Moisture Sensitive Level
A resistor to limit current to the LED is required. The
recommended value is 220W ( 10 %) and the resistor
should be placed in series between the 5V supply and
pin 3 of the device (Vled). This will result in an LED cur-
rent of approximately 15 mA.
The AEDR-8300 series is specified to moisture sensitive
level (MSL) 3.
6
Outline Drawing
0.95
5.12
0.60
PIN 6
PIN 5
PIN 4
PIN 6
PIN 1
Chamfer
PIN 2
PIN 3
Detector
Emitter
PIN 5
PIN 4
PIN 1
PIN 2
PIN 3
2.06
+
5.12
3.96
All dimensions in millimeters.
Tolerance x.xx ± 0.15 mm.
Note:
For ease of reference, a chamfer is marked on the detector side (pin
6), as shown in the above diagram.
Encoder Orientation
The AEDR-8300 series is designed such that both the
LED and detector IC should be placed parallel to the
window/bar orientation, as shown. As such, the en-
coder is tolerant against radial play of 0.38 mm. The
emitter side (pins 3 and 4) should be placed closer to
the rotating shaft.
Codewheel
Codestrip
Direction of
radial play
Direction of
radial play
7
Mounting Consideration
Codewheel/codestrip
Gap
Rop
11.00 mm (0.433 IN) < ROP < ∞
Direction of Codewheel Rotation
With the emitter side (pins 3 and 4) of the encoder
placed closer to the codewheel centre, Channel A leads
Channel B when the codewheel rotates anti-clockwise
and vice versa.
Anti-
emitter
emitter
clockwise
Clockwise
Ch. A leads
Ch. B
Ch. B leads
Ch. A
Viewed from Top
8
Recommended Land Pattern for AEDR-8300 Series
0.72
Mounting Center
0.94
1.96
Note: The shaded areas are not
encoder pin-outs. They are
electrically grounded and
Note: The shaded areas
are the leads for soldering.
1.08
physically exposed. PCB layout
with tracks running across
these areas should be avoided.
Recommended Lead-free Reflow Soldering Temperature Profile
300
10 - 20 sec
255°C
250°C
250
217°C
200
120 sec max
60 - 150 sec
150
125°C
100
50
0
40°C
TIME (sec.)
Heat up
Solder Paste Dry
Solder Reflow
Cool Down
Preheat Temperature 40°C to 125°C = 120 sec max
Temperature maintain above 217°C = 60-150 sec
Peak Temperature = 255 ± 5°C
Time above 250°C = 10-20 sec
Note: Due to treatment of high temperature, AEDR-
8300 transparent compound is expected to turn yellow
after IR reflow.
Resolution Indicator
Since the encoder is too small to imprint resolution marking on its package, color-coding the package is employed
to differentiate resolutions. The details are:
36 LPI = Green package
75LPI = Clear package
150LPI = Red package
180LPI = Amber package
Ordering Information
AEDR-83—0
Option— — —
Lines per inch
K – 75LPI
Shipping Units
0 – 1000 pcs
1 – 500 pcs
Number of Channel
1 – One channel
Packaging
P – 150LPI
Note: Encoders are packed in tape in quantities of 100, 500 or 1000 pieces.
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, Limited in the United States and other countries.
Data subject to change. Copyright © 2007 Avago Technologies Limited. All rights reserved. Obsoletes 5989-0464EN
AV02-0088EN -January 16, 2007
10
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