AEDR-8310-1V1 [AGILENT]
Agilent AEDR-8300 Series Encoders Reflective Surface Mount Optical Encoder; 安捷伦AEDR- 8300系列反射式编码器表面贴装光学编码器
| 型号： | AEDR-8310-1V1 |
| 厂家： | 
AGILENT TECHNOLOGIES, LTD. |
| 描述： | Agilent AEDR-8300 Series Encoders Reflective Surface Mount Optical Encoder |
| 文件： | 总10页 (文件大小：110K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Agilent AEDR-8300 Series Encoders
Reflective Surface Mount Optical Encoder
Data Sheet
Features
• Reflective technology
• Surface mount small outline
leadless package
• Single channel incremental output
• Two channel quadrature outputs for
direction sensing
Description
tions, namely 36, 75, 150 and 180
lines per inch (LPI) (1.42, 2.95, 5.91
and 7.09 lines per mm respec-
tively). This range of resolutions
caters for different design and
application needs.
The AEDR-8300 series is the
smallest optical encoder employ-
ing reflective technology for
motion control purposes. The
encoder houses an LED light
source and a photo-detecting
circuitry in a single package.
• TTL compatible output
• 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 AEDS-8300 series offers
The AEDR-8300 series provides
motion sensing at a competitive
cost, making it ideal for high
volume applications. Its small
size and surface mount package
make it ideal for printers, copi-
ers, card readers and many
consumer products, particularly
where space and weigh are
design constraint.
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 process-
ing circuitries. Hence the encoder
provides great design-in flexibil-
ity and easy integration into
existing systems. The AEDR-8300
series is available in four resolu-
Note: All specifications are subject to change without prior notification.
Theory of Operation
IC, whereas no light is reflected
by the non-reflective area (bar).
An alternating light and dark
patterns corresponding to the
window and bar fall on the
Phase (φ): The number of electri-
cal degrees between the center of
high state of Channel A and the
center of high state of Channel B.
Nominally 90oe.
The AEDR-8300 series combines
an emitter and a detector in a
single surface mount leadless
package. When used with a
codewheel or linear codestrip,
the encoder translates rotary or
photodiodes as the codewheel
rotates. The moving light pattern
Phase Error (∆φ): The deviation
of phase, in electrical degree,
from its ideal value of 90oe.
linear motion into digital outputs. is exploited by the detector
As seen in the block diagram, the
AEDR-8300 consists of three
major components: a light emit-
ting diode (LED) light source, a
detector IC consisting photo-
diodes and lens to focus light
beam from the emitter as well as
light falling on the detector.
circuitry to produce digital
outputs representing the rotation
of the codewheel. When the
codewheel is coupled to a motor,
the encoder outputs is then a
direct representation of the
motor rotation. The same con-
cept applies to the use of a
Pulse Width (P): The duration of
high state of the output, in
electrical degree, within one
cycle. Nominally 180oe or half a
cycle.
codestrip to detect linear motion. Pulse Width Error (∆P): The
The operation of the encoder is
based on the principle of optics
where the detector photodiodes
sense the absence and presence
of light. In this case, the rotary/
linear motion of an object being
monitored is converted to
equivalent light pattern via the
use of codewheel/codestrip. As
shown in the above diagram, the
reflective area (window) of the
codewheel (or codestrip) reflects
light back to the photodetector
deviation of pulse width, in
electrical degree, from its ideal
value of 180oe.
Definitions
State Width (S): The number of
electrical degrees between a
transition in Channel A and the
Count (N): The number of
window and bar pair per revolu-
neighboring transition in Chan-
tion (CPR) of codewheel. For
nel B. There are 4 states per
linear codestrip, defined as the
number of window and bar pair
per unit length (lines per inch
[LPI] or lines per mm [LPmm]).
cycle, each nominally 90oe.
State Width Error (∆S): The
deviation of state width, in
electrical degree, from its ideal
value of 90oe.
One Cycle (C): 360 electrical
degrees (oe). Equivalent to one
window and bar pair.
One Shaft Rotation: 360 me-
chanical degrees. Also equivalent
to N counts (codewheel only).
V
LED
R
CODEWHEEL
OR
CODESTRIP
GND
Line Density: The number of
window and bar pair per unit
length, expressed in either lines
per inch (LPI) or lines per mm
(LPmm).
V
CC
CH A
CH B
SIGNAL
PROCESSING
CIRCUITRY
Optical radius (Rop): The
distance between the codewheel
center and the centerline be-
tween the two domes of the
encoder.
GND
Figure 1. Block Diagram of AEDR-8300.
2
Gap (G): The distance from
surface of the encoder to the
surface of codewheel or
codestrip.
Radial and Tangential Mis-
alignment Error (ER, ET): For
rotary motion, mechanical dis-
placement in the radial and
tangential directions relative to
the nominal alignment.
Specular Reflectance (Rf): The
amount of incident light reflected
by a surface. Quantified in terms
of the percentage of incident
Angular Misalignment Error
(EA): Angular displacement of
light. A spectrometer can be used the encoder relative to the
to measure specular reflectance
of a surface (contact factory for
more information).
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
Output Voltage, VO
-0.5 V to VCC
-1.0 mA to 8 mA
Output Current per Channel, IOUT
Human Body Model JESD22-A114-A Class 2
Machine Model JESD22-A115-A Class B
ESD
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 degradation 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
VCC
ILED
CL
f
0
25
5
85
°C
V
Supply Voltage
LED Current
4.5
13
5.5
18
Ripple< 100mVp-p
See note 1
15
mA
pF
Load Capacitance
Count Frequency
100
30
2.7 kΩ Pull-Up
kHz
AEDR-83X0-K/P/Q
See Note 2
Count Frequency
f
15
kHz
AEDR-8310-V
Radial Misalignment
Tangential Misalignment
Angular Misalignment
Codewheel/strip tilt
ER
ET
EA
CT
G
±0.38 (±0.015)
±0.38 (±0.015)
±1.5
mm (in.)
mm (in.)
deg.
0
0
1
deg.
Codewheel/strip Gap
1.0 (0.04)
2.0 (0.08)
2.5 (0.10)
mm (in.)
Note:
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 kΩ
CL = 25 pF, RL = 2.7 kΩ
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
10
Reflective area. See note 1.
Non-reflective area
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
Rop
11
11
mm
Recommended value
Notes:
1. Measurements from spectrometer. Contact factory for more information.
2. Contact factory for more information on compatibility of codewheel/strip.
LED Current Limiting Resistor
A resistor to limit current to the
LED is required. The recom-
mended value is 220Ω (±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.
Moisture Sensitive Level
The AEDR-8300 series is speci-
fied 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 de-
signed such that both the LED
and detector IC should be placed
parallel to the window/bar
orientation, as shown. As such,
the encoder 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 trans-
parent compound is expected to
turn yellow after IR reflow.
9
Resolution Indicator
Since the encoder is too small to imprint resolution marking on its
package, color-coding the package is employed to differentiate resolu-
tions. 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
P – 150LPI
Q - 180LPI
V - 36LPI
Shipping Units
0 – 1000 pcs
1 – 500 pcs
Number of Channel
1 – One channel
0 – Two channels
Packaging
1 – Tape and Reel
2 - 100 pcs
Note: Encoders are packed in tape in quantities of 100, 500 or 1000 pieces.
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
(916) 788-6763
Europe: +49 (0) 6441 92460
China: 10800 650 0017
Hong Kong: (65) 6756 2394
India, Australia, New Zealand: (65) 6755 1939
Japan: (+81 3) 3335-8152(Domestic/International), or
0120-61-1280(Domestic Only)
Korea: (65) 6755 1989
Singapore, Malaysia, Vietnam, Thailand, Philippines,
Indonesia: (65) 6755 2044
Taiwan: (65) 6755 1843
Data subject to change.
Copyright © 2004 Agilent Technologies, Inc.
June 7, 2004
5989-0464EN
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