HEDS-9101 PDF даташит
Спецификация HEDS-9101 изготовлена «Avago» и имеет функцию, называемую «Two Channel Optical Incremental Encoder Modules». |
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Детали детали
Номер произв | HEDS-9101 |
Описание | Two Channel Optical Incremental Encoder Modules |
Производители | Avago |
логотип |
9 Pages
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HEDS-9000/9100
Two Channel Optical Incremental Encoder Modules
Data Sheet
Description
The HEDS-9000 and the HEDS-9100 series are high
performance, low cost, optical incremental encoder
modules. When used with a codewheel, these mod-
ules detect rotary position. The modules consist of a
lensed (LED) source and a detector IC enclosed in a small
C-shaped plastic package. Due to a highly collimated
light source and unique photodetector array, these mod-
ules are extremely tolerant to mounting misalignment.
The two channel digital outputs and the single 5 V sup-
ply input are accessed through five 0.025 inch square
pins located on 0.1 inch centers.
Standard resolutions for the HEDS-9000 are 500 CPR
and 1000 CPR for use with a HEDS-6100 codewheel or
equivalent.
For the HEDS-9100, standard resolutions between 96
CPR and 512 CPR are available for use with a HEDS-5120
codewheel or equivalent.
Features
• High performance
• High resolution
• Low cost
• Easy to mount
• No signal adjustment required
• Small size
• -40°C to 100 °C operating temperature
• Two channel quadrature output
• TTL compatible
• Single 5 V supply
Applications
The HEDS-9000 and 9100 provide sophisticated mo-
tion detection at a low cost, making them ideal for high
volume applications. Typical applications include print-
ers, plotters, tape drives, and factory automation equip-
ment.
Note: Avago Technologies encoders are not recommend-
ed for use in safety critical applications. Eg. ABS braking
systems, power steering, life support systems and critical
care medical equipment. Please contact sales represen-
tative if more clarification is needed.
ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE.
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Theory of Operation
The HEDS-9000 and 9100 are C-shaped emitter/detec-
tor modules. Coupled with a codewheel, they translate
the rotary motion of a shaft into a two-channel digital
output.
As seen in the block diagram, each module contains a
single Light Emitting Diode (LED) as its light source. The
light is collimated into a parallel beam by means of a
single polycarbonate lens located directly over the LED.
Opposite the emitter is the integrated detector circuit.
This IC consists of multiple sets of photodetectors and
the signal processing circuitry necessary to product the
digital waveforms.
The codewheel rotates between the emitter and detec-
tor, causing the light beam to be interrupted by the pat-
tern of spaces and bars on the codewheel. The photo-
diodes which detect these interruptions are arranged in
a pattern that corresponds to the radius and design of
the odewheel. These detectors are also spaced such that
a light period on one pair of detectors corresponds to a
dark period on the adjacent pair of detectors. The photo-
diode outputs are then fed through the signal process-
ing circuitry resulting in A, A, B, and B. Two comparators
receive these signals and produce the final outputs for
channels A and B. Due to this integrated phasing tech-
nique, the digital output of channel A is in quadrature
with that of channel B (90 degrees out of phase).
Package Dimensions
HEDS-9x00
0.63 (0.025)
SQR. TYP.
OPTION CODE
5.1 (0.20)
26.67 (1.05)
15.2
(0.60)
1.02 ± 0.10
(0.040 ± 0.004)
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085)
DEEP
1.85 (0.073)
8.64 (0.340)
REF.
CL
17.27
(0.680)
20.96
(0.825)
SIDE A
8.6 (0.34)
2.54 (0.100) TYP.
1.0 (0.04)
1.52 (0.060)
1.8
(0.07)
DATE CODE
3.73 ± 0.05
(0.147 ± 0.002)
2.67 (0.105) DIA.
MOUNTING THRU
HOLE 2 PLACES
2.44/2.41 X 2.79
(0.096/0.095 X 0.110)
2.16 (0.085) DEEP
OPTICAL CENTER
20.8
(0.82)
11.7
(0.46)
1.78 ± 0.10*
(0.070 ± 0.004)
2.92 ± 0.10**
(0.115 ± 0.004)
2.21
(0.087) 2.54
(0.100)
2.9
(0.11)
6.9 (0.27)
10.16
(0.400)
OPTICAL
CENTER LINE
5.46 ± 0.10
(0.215 ± 0.004)
4.75 ± 0.10
(0.187 ± 0.004)
ALIGNING RECESS
2.44/2.41 X 2.79
(0.096/0.095 X 0.110)
2.16 (0.085) DEEP
OPTICAL
CENTER
TYPICAL DIMENSIONS IN MILLIMETERS AND (INCHES)
* GAP MEASUREMENT TO THE SURFACE WINDOW = 1.68 ± 0.10 (0.066 ± 0.004)
** HEIGHT TO THE WINDOW = 3.02 ± 0.10 (0.119 ± 0.004)
SIDE B
11.9
(0.47)
8.81
45
5.8 (0.347)
(0.23)
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085) DEEP
4.11 (0.162)
6.35 (0.250) REF.
HEDS-9x01
0.63 (0.025)
SQR. TYP.
OPTION CODE
5.1 (0.20)
26.67 (1.05)
15.2
(0.60)
1.02 ± 0.10
(0.040 ± 0.004)
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085)
DEEP
1.85 (0.073)
8.64 (0.340)
REF.
CL
17.27
(0.680)
20.96
(0.825)
SIDE A
8.6 (0.34)
2.54 (0.100) TYP.
1.0 (0.04)
4.01 ± 0.20
(0.158 ± 0.008)
1.8
(0.07)
DATE CODE
3.73 ± 0.05
(0.147 ± 0.002)
2.67 (0.105) DIA.
MOUNTING THRU
HOLE 2 PLACES
2.44/2.41 X 2.79
(0.096/0.095 X 0.110)
2.16 (0.085) DEEP
OPTICAL CENTER
16.76 ± 0.20
(0.66 ± 0.008)
11.7
(0.46)
1.78 ± 0.10 *
(0.070 ± 0.004)
2.92 ± 0.10**
(0.115 ± 0.004)
2.21
(0.087) 2.54
(0.100)
2.9
(0.11)
10.16
(0.400)
OPTICAL
CENTER LINE
5.46 ± 0.10
(0.215 ± 0.004)
4.75 ± 0.10
(0.187 ± 0.004)
ALIGNING RECESS
2.44/2.41 X 2.79
(0.096/0.095 X 0.110)
2.16 (0.085) DEEP
OPTICAL
CENTER
TYPICAL DIMENSIONS IN MILLIMETERS AND (INCHES)
* GAP MEASUREMENT TO THE SURFACE WINDOW = 1.68 ± 0.10 (0.066 ± 0.004)
** HEIGHT TO THE WINDOW = 3.02 ± 0.10 (0.119 ± 0.004)
SIDE B
8.81
45°
5.8 (0.347)
(0.23)
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085) DEEP
4.11 (0.162)
6.35 (0.250) REF.
2
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Block Diagram
Output Waveforms
C
P
ф
S1 S2 S3
S4
ROTATION
CHANNEL A
CHANNEL B
Definitions
Count (N): The number of bar and window pairs or counts
per revolution (CPR) of the codewheel.
1 Shaft Rotation
= 360 mechanical degrees,
= N cycles.
1 cycle (C) = 360 electrical degrees (°e),
= 1 bar and window pair.
Pulse Width (P): The number of electrical degrees that
an output is high during 1 cycle. This value is nominally
180°e or 1/2 cycle.
Pulse Width Error (∆P): The deviation, in electrical degrees
of the pulse width from its ideal value of 180°e.
State Width (S): The number of electrical degrees between a
transition in the output of chann el A and the neighboring
transition in the output of channel B.There are 4 states per
cycle, each nominally 90°e.
State Width Error (∆S): The deviation, in electrical degrees,
of each state width from its ideal value of 90°e.
Phase (φ): The number of electrical degrees between the
center of the high state of channel A and the center of
the high state of channel B. This value is nominally 90°e
for quadrature output.
Phase Error (∆φ): The deviation of the phase from its ideal
value of 90°e.
Direction of Rotation: When the codewheel rotates in the
direction of the arrow on top of the module, channel A will
lead channel B. If the codewheel rotates in the opposite
direction, channel B will lead channel A.
Optical
center
oRfardoituasti(oRnop)t:oTthheedoispttaicnaclecfernotmer
the codewheel’s
(O.C.) of the en-
coder module.
3
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