2024年4月27日发(作者：示代天)
元器件交易网
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
Description
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.
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 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-
•Two channel quadrature outputs for
direction sensing
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.
Applications
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.
•TTL compatible output
•Single 5V supply
•-20
o
C to 85
o
C absolute operating
temperature
•Encoding resolution options:
36, 75, 150, 180 (lines/inch) or
1.42, 2.95, 5.91, 7.09 (lines/mm)
Note: All specifications are subject to change without prior notification.
元器件交易网
Theory of OperationIC, whereas no light is reflected
The AEDR-8300 series combinesby the non-reflective area (bar).
an emitter and a detector in aAn alternating light and dark
single surface mount leadlesspatterns corresponding to the
package. When used with awindow and bar fall on the
codewheel or linear codestrip,photodiodes as the codewheel
the encoder translates rotary orrotates. The moving light pattern
linear motion into digital exploited by the detector
As seen in the block diagram, thecircuitry to produce digital
AEDR-8300 consists of threeoutputs representing the rotation
major components: a light emit-of the codewheel. When the
ting diode (LED) light source, acodewheel is coupled to a motor,
detector IC consisting photo-the encoder outputs is then a
diodes and lens to focus lightdirect representation of the
beam from the emitter as well asmotor rotation. The same con-
light falling on the applies to the use of a
codestrip to detect linear motion.
The operation of the encoder is
based on the principle of optics
where the detector photodiodes
Definitions
sense the absence and presence
State Width (S): The number of
of light. In this case, the rotary/
electrical degrees between a
linear motion of an object being
transition in Channel A and the
monitored is converted to
neighboring transition in Chan-
equivalent light pattern via the
nel B. There are 4 states per
use of codewheel/codestrip. As
cycle, each nominally 90
o
e.
shown in the above diagram, the
reflective area (window) of the
State Width Error (∆S): The
codewheel (or codestrip) reflects
deviation of state width, in
light back to the photodetector
electrical degree, from its ideal
value of 90
o
e.
V
LED
R
CODEWHEEL
GND
OR
CODESTRIP
V
CC
CH A
SIGNAL
CH B
PROCESSING
CIRCUITRY
GND
Figure 1. Block Diagram of AEDR-8300.
2
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 90
o
e.
Phase Error (∆φ): The deviation
of phase, in electrical degree,
from its ideal value of 90
o
e.
Pulse Width (P): The duration of
high state of the output, in
electrical degree, within one
cycle. Nominally 180
o
e or half a
cycle.
Pulse Width Error (∆P): The
deviation of pulse width, in
electrical degree, from its ideal
value of 180
o
e.
Count (N): The number of
window and bar pair per revolu-
tion (CPR) of codewheel. For
linear codestrip, defined as the
number of window and bar pair
per unit length (lines per inch
[LPI] or lines per mm [LPmm]).
One Cycle (C): 360 electrical
degrees (
o
e). Equivalent to one
window and bar pair.
One Shaft Rotation: 360 me-
chanical degrees. Also equivalent
to N counts (codewheel only).
Line Density: The number of
window and bar pair per unit
length, expressed in either lines
per inch (LPI) or lines per mm
(LPmm).
Optical radius (Rop): The
distance between the codewheel
center and the centerline be-
tween the two domes of the
encoder.
2024年4月27日发(作者：示代天)
元器件交易网
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
Description
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.
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 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-
•Two channel quadrature outputs for
direction sensing
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.
Applications
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.
•TTL compatible output
•Single 5V supply
•-20
o
C to 85
o
C absolute operating
temperature
•Encoding resolution options:
36, 75, 150, 180 (lines/inch) or
1.42, 2.95, 5.91, 7.09 (lines/mm)
Note: All specifications are subject to change without prior notification.
元器件交易网
Theory of OperationIC, whereas no light is reflected
The AEDR-8300 series combinesby the non-reflective area (bar).
an emitter and a detector in aAn alternating light and dark
single surface mount leadlesspatterns corresponding to the
package. When used with awindow and bar fall on the
codewheel or linear codestrip,photodiodes as the codewheel
the encoder translates rotary orrotates. The moving light pattern
linear motion into digital exploited by the detector
As seen in the block diagram, thecircuitry to produce digital
AEDR-8300 consists of threeoutputs representing the rotation
major components: a light emit-of the codewheel. When the
ting diode (LED) light source, acodewheel is coupled to a motor,
detector IC consisting photo-the encoder outputs is then a
diodes and lens to focus lightdirect representation of the
beam from the emitter as well asmotor rotation. The same con-
light falling on the applies to the use of a
codestrip to detect linear motion.
The operation of the encoder is
based on the principle of optics
where the detector photodiodes
Definitions
sense the absence and presence
State Width (S): The number of
of light. In this case, the rotary/
electrical degrees between a
linear motion of an object being
transition in Channel A and the
monitored is converted to
neighboring transition in Chan-
equivalent light pattern via the
nel B. There are 4 states per
use of codewheel/codestrip. As
cycle, each nominally 90
o
e.
shown in the above diagram, the
reflective area (window) of the
State Width Error (∆S): The
codewheel (or codestrip) reflects
deviation of state width, in
light back to the photodetector
electrical degree, from its ideal
value of 90
o
e.
V
LED
R
CODEWHEEL
GND
OR
CODESTRIP
V
CC
CH A
SIGNAL
CH B
PROCESSING
CIRCUITRY
GND
Figure 1. Block Diagram of AEDR-8300.
2
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 90
o
e.
Phase Error (∆φ): The deviation
of phase, in electrical degree,
from its ideal value of 90
o
e.
Pulse Width (P): The duration of
high state of the output, in
electrical degree, within one
cycle. Nominally 180
o
e or half a
cycle.
Pulse Width Error (∆P): The
deviation of pulse width, in
electrical degree, from its ideal
value of 180
o
e.
Count (N): The number of
window and bar pair per revolu-
tion (CPR) of codewheel. For
linear codestrip, defined as the
number of window and bar pair
per unit length (lines per inch
[LPI] or lines per mm [LPmm]).
One Cycle (C): 360 electrical
degrees (
o
e). Equivalent to one
window and bar pair.
One Shaft Rotation: 360 me-
chanical degrees. Also equivalent
to N counts (codewheel only).
Line Density: The number of
window and bar pair per unit
length, expressed in either lines
per inch (LPI) or lines per mm
(LPmm).
Optical radius (Rop): The
distance between the codewheel
center and the centerline be-
tween the two domes of the
encoder.