HEDT-9000A00 [ETC]
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| 型号： | HEDT-9000A00 |
| 厂家： | 
ETC |
| 描述： |
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| 文件： | 总6页 (文件大小：268K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
High Temperature 125°C Two
Channel Optical Incremental
Encoder Modules
Technical Data
HEDT-9000
HEDT-9100
Features
Description
The HEDT-9000 and the HEDT-
9100 series are high
• High Performance
• High Resolution
• Low Cost
• Easy to Mount
• No Signal Adjustment
Required
• Insensitive to Radial and
Axial Play
• Small Size
• -40°C to 125°C Operating
Temperature
performance, low cost, optical
incremental encoder modules that
operate to 125°C. When used with
a codewheel, these modules
detect rotary position. The
modules consist of a lensed (LED)
source and a detector IC enclosed
in a small C-shaped plastic pack-
age. Due to a highly collimated
light source and unique
The two channel digital outputs
and the single 5 V supply input
are accessed through five 0.025
inch square pins located on 0.1
inch centers.
photodetector array, these
modules are extremely tolerant to
mounting misalignment.
• Two Channel Quadrature
Output
• TTL Compatible
• Single 5 V Supply
Package Dimensions
26.67 (1.05)
15.2
8.6 (0.34)
(0.60)
0.63 (0.025)
2.54 (0.100) TYP.
SQR. TYP.
OPTION CODE
5.1 (0.20)
1.8
(0.07)
1.52 (0.060)
1.0 (0.04)
2.9
(0.11)
DATE CODE
2.21
(0.087)
6.9 (0.27)
11.9
(0.47)
2.54
(0.100)
3.73 ± 0.05
(0.147 ± 0.002)
20.8
(0.82)
H E D S - 9 X 0 0
1.02 ± 0.10
11.7
(0.46)
(0.040 ± 0.004)
8.81
(0.347)
4.75 ± 0.10
(0.187 ± 0.004)
5.8
(0.23)
45°
OPTICAL
CENTER LINE
2.67 (0.105) DIA.
MOUNTING THRU
HOLE 2 PLACES
ALIGNING RECESS
2.44/2.41 DIA.
ALIGNING RECESS
2.44/2.41 X 2.79
(0.215 ± 0.004) (0.096/0.095 X 0.110)
C
L
1.85 (0.073)
1.78 ± 0.10
(0.070 ± 0.004)
5.46 ± 0.10
(0.096/0.095)
2.16 (0.085)
DEEP
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
8.64 (0.340)
REF.
2.44/2.41 X 2.79
(0.096/0.095 X 0.110)
2.16 (0.085) DEEP
2.16 (0.085) DEEP
2.92 ± 0.10
(0.115 ± 0.004)
17.27
(0.680)
2.16 (0.085) DEEP
OPTICAL
CENTER
4.11 (0.162)
10.2
(0.400)
20.96
(0.825)
OPTICAL CENTER
6.35 (0.250) REF.
TYPICAL DIMENSIONS IN
MILLIMETERS AND (INCHES)
SIDE A
SIDE B
ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC
DISCHARGE.
2
Standard resolutions for the
HEDT-9000 are 500 CPR and
1000 CPR for use with a HEDS-
6100 codewheel or equivalent.
For the HEDT-9100, standard
resolutions between 96 CPR and
512 CPR are available for use
with a HEDS-5120 codewheel or
equivalent.
Block Diagram
Applications
The HEDT-9000 and 9100
provide sophisticated motion
detection at a low cost, at
temperatures to 125°C, making
them ideal for high volume
automotive applications.
Theory of Operation
Output Waveforms
The HEDT-9000 and 9100 are C-
shaped emitter/detector 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 polyetherimide
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.
pair of detectors. The photodiode
outputs are then fed through the
signal processing circuitry
Definitions
The codewheel rotates between
the emitter and detector,causing
the light beam to be interrupted
by the pattern of spaces and bars
on the codewheel. The
photodiodes which detect these
interruptions are arranged in a
pattern that corresponds to the
radius and design of the code-
wheel. These detectors are also
spaced such that a light period on
one pair of detectors corresponds
to a dark period on the adjacent
Count (N): The number of bar
and window pairs or counts per
revolution (CPR) of the
codewheel.
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 technique, the
digital output of channel A is in
quadrature with that of channel B
(90 degrees out of phase).
1 Shaft Rotation = 360
mechanical
degrees,
= N cycles.
1 cycle(C) = 360
electrical
degrees (°e),
= 1 bar and
window pair.
3
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.
Absolute Maximum Ratings
Storage Temperature, TS ..................................................................... -40°C to 125°C
Operating Temperature, TA ................................................................ -40°C to 125°C
Supply Voltage, V ...................................................................................... -0.5 V to 7 V
CC
Output Voltage, V ........................................................................................ -0.5 V to V
Output Current per Channel, Iout ................................................. -1.0 mA to 5 mA
Pulse Width Error (∆P): The
deviation, in electrical degrees of
the pulse width from its ideal
value of 180°e.
O
CC
Phase (φ): The number of elec-
trical degrees between the center
module, channel A will lead
channel B. If the codewheel
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.
of the high state of channel A and
rotates in the opposite direction,
the center of the high state of
channel B will lead channel A.
channel B. This value is nominally
Optical Radius (Rop): The dis-
90°e for quadrature output.
tance from the codewheel’s center
of rotation to the optical center
(O.C.) of the encoder module.
Phase Error (∆φ): The deviation
of the phase from its ideal value
of 90°e.
State Width Error (∆S): The
deviation, in electrical degrees, of
each state width from its ideal
value of 90°e.
Direction of Rotation: When the
codewheel rotates in the direction
of the arrow on top of the
Recommended Operating Conditions
Parameter
Temperature
Symbol
Min.
-40
Typ.
Max.
125
5.5
Units
°C
Notes
T
VCC
CL
f
Supply Voltage
Load Capacitance
Count Frequency
4.5
Volts
pF
Ripple < 100 mVp-p
3.3 kΩ pull-up resistor
Velocity (rpm) x N
60
100
100
kHz
Note: The module performance is guaranteed to 100 kHz but can operate at higher frequencies.
Encoding Characteristics
Encoding Characteristics over Recommended Operating Range and Recommended Mounting Tolerances.
These Characteristics do not include codewheel/codestrip contributions.
Description
Pulse Width Error
Logic State Width Error
Phase Error
Sym.
∆P
Typ.
Case 1 Max.
Case 2 Max.
Units
°e
Notes
7
5
2
35
35
15
45
45
20
∆S
°e
∆φ
°e
Case 1: Module mounted on tolerance circle of ± 0.13 mm (± 0.005 in.).
Case 2: HEDT-9000 mounted on tolerances of ± 0.50 mm (0.020").
HEDT-9100 mounted ontolerances of ± 0.38 mm (0.015").
4
Electrical Characteristics
Electrical Characteristics over Recommended Operating Range, typical at 25°C.
Parameter
Supply Current
Symbol
Min.
Typical
Max.
Units
Notes
ICC
17
40
mA
High Level Output Voltage
Low Level Output Voltage
Rise Time
VOH
VOL
tr
2.4
Volts
Volts
ns
IOH = -40 µA max.
0.4
IOL = 3.2 mA
200
50
CL = 25 pF
RL = 11 kΩ pull-up
Fall Time
tf
ns
Recommended Codewheel Characteristics
Codewheel Options
Optical
Radius
mm (in.)
HEDS
Series
CPR
(N)
Option
5120
5120
5120
5120
5120
5120
5120
5120
5120
96
K
C
D
E
F
G
H
A
I
11.00 (0.433)
11.00 (0.433)
11.00 (0.433)
11.00 (0.433)
11.00 (0.433)
11.00 (0.433)
11.00 (0.433)
11.00 (0.433)
11.00 (0.433)
100
192
200
256
360
400
500
512
Figure 1. Codestrip Design.
6100
6100
500
1000
A
B
23.36 (0.920)
23.36 (0.920)
Parameter
Window/Bar Ratio
Window Length
Symbol
φw/φb
L
Minimum
0.7
Maximum
Units
Notes
1.4
1.8 (0.07)
2.3 (0.09)
mm (inch)
Absolute Maximum
Codewheel Radius
RC
ROP + 1.9 (0.075) mm (inch) Includes eccentricity
errors
5
Mounting Considerations
Figure 2. Mounting Plane Side A.
Figure 3. Mounting Plane Side B.
Figure 5. HEDS-6100 Codewheel.
Figure 4. HEDS-5120 Codewheel.
Ordering Information
0 0
HEDT-9000 Option
HEDS-6100 Option
Resolution
(Cycles/Rev)
Shaft Diameter
05 - 3/16 in.
06 - 1/4 in.
07 - 5/16 in.
08 - 3/8 in.
09 - 1/2 in.
10 - 5/8 in.
11 - 4 mm
12 - 6 mm
13 - 8 mm
A - 500 CPR
B - 1000 CPR
0 0
HEDT-9100 Option
HEDS-5120 Option
Resolution
(Cycles/Rev)
Shaft Diameter
K - 96 CPR
G - 360 CPR
01 - 2 mm
02 - 3 mm
03 - 1/8 in.
04 - 5/32 in.
05 - 3/16 in.
06 - 1/4 in.
11 - 4 mm
14 - 5 mm
12 - 6 mm
13 - 8 mm
C - 100 CPR H - 400 CPR
D - 192 CPR A - 500 CPR
E - 200 CPR I - 512 CPR
F - 256 CPR
www.semiconductor.agilent.com
Data subject to change.
Copyright © 1999 Agilent Technologies, Inc.
Obsoletes 5962-8504E (2/94)
5965-5885E (11/99)
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HEDT-9001-A00
High Temperature 125 Degree Celcious Two Channel Optical Incremental Encoder Modules
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HEDT-9100
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