AGILENT HEDT-9100-A00

High Temperature 125°C Two
Channel Optical Incremental
Encoder Modules
Technical Data
HEDT-9000
HEDT-9100
Features
Description
• 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
• Two Channel Quadrature
Output
• TTL Compatible
• Single 5 V Supply
The HEDT-9000 and the HEDT9100 series are high
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 package. Due to a highly collimated
light source and unique
photodetector array, these
modules are extremely tolerant to
mounting misalignment.
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.
Package Dimensions
1.0 (0.04)
5.1 (0.20)
DATE CODE
3.73 ± 0.05
(0.147 ± 0.002)
HEDS-9X00
CL
17.27
(0.680)
20.96
(0.825)
SIDE A
2.21
(0.087) 2.54
(0.100)
20.8
(0.82)
11.7
(0.46)
YYXX
ALIGNING RECESS
2.44/2.41 DIA.
1.85 (0.073)
(0.096/0.095)
2.16 (0.085)
8.64 (0.340)
DEEP
REF.
X00
1.02 ± 0.10
(0.040 ± 0.004)
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
OPTICAL
CENTER LINE
5.46 ± 0.10
(0.215 ± 0.004)
1.78 ± 0.10
(0.070 ± 0.004)
2.92 ± 0.10
(0.115 ± 0.004)
10.2
(0.400)
TYPICAL DIMENSIONS IN
MILLIMETERS AND (INCHES)
2.9
(0.11)
GND
1.8
(0.07)
1.52 (0.060)
OPTION CODE
CH. B
VCC
CH. A
N.C.
GND
2.54 (0.100) TYP.
VCC
8.6 (0.34)
5
4
3
2
1
0.63 (0.025)
SQR. TYP.
26.67 (1.05)
15.2
(0.60)
6.9 (0.27)
11.9
(0.47)
8.81
5.8
45° (0.23) (0.347)
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
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085) DEEP
OPTICAL
CENTER
4.11 (0.162)
6.35 (0.250) REF.
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 HEDS6100 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.
Note: Agilent Technologies
encoders are not recommended
for use in safety critical
applications. Eg. ABS braking
systems, power steering, life
support systems and critical care
medical equipment. Please
contact sales representative if
more clarification is needed.
Output Waveforms
Theory of Operation
The HEDT-9000 and 9100 are Cshaped 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.
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 codewheel. 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 photodiode
outputs are then fed through the
signal processing 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 technique, the
digital output of channel A is in
quadrature with that of channel B
(90 degrees out of phase).
Definitions
Count (N): The number of bar
and window pairs or counts per
revolution (CPR) of the
codewheel.
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, T S ..................................................................... -40°C to 125°C
Operating Temperature, TA ................................................................ -40°C to 125°C
Supply Voltage, VCC ...................................................................................... -0.5 V to 7 V
Output Voltage, VO ........................................................................................ -0.5 V to VCC
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.
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.
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.
module, channel A will lead
channel B. If the codewheel
rotates in the opposite direction,
channel B will lead channel A.
Optical Radius (Rop ): The distance from the codewheel’s center
of rotation to the optical center
(O.C.) of the encoder module.
Direction of Rotation: When the
codewheel rotates in the direction
of the arrow on top of the
Recommended Operating Conditions
Parameter
Symbol
Min.
T
Supply Voltage
VCC
Load Capacitance
Count Frequency
Temperature
Typ.
Max.
Units
Notes
-40
125
°C
4.5
5.5
Volts
CL
100
pF
3.3 kΩ pull-up resistor
f
100
kHz
Velocity (rpm) x N
Ripple < 100 mVp-p
60
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
Sym.
Typ.
Case 1 Max.
Case 2 Max.
Units
Pulse Width Error
∆P
7
35
45
°e
Logic State Width Error
∆S
5
35
45
°e
Phase Error
∆φ
2
15
20
°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").
Notes
4
Electrical Characteristics
Electrical Characteristics over Recommended Operating Range, typical at 25°C.
Parameter
Symbol
Supply Current
ICC
High Level Output Voltage
VOH
Low Level Output Voltage
VOL
Min.
Typical
Max.
Units
17
40
mA
2.4
0.4
Notes
Volts
IOH = -40 µA max.
Volts
IOL = 3.2 mA
Rise Time
tr
200
ns
Fall Time
tf
50
ns
CL = 25 pF
RL = 11 kΩ pull-up
Recommended Codewheel Characteristics
Codewheel Options
Figure 1. Codestrip Design.
Parameter
HEDS
Series
CPR
(N)
Option
Optical
Radius
mm (in.)
5120
5120
5120
5120
5120
5120
5120
5120
5120
96
100
192
200
256
360
400
500
512
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)
6100
6100
500
1000
A
B
23.36 (0.920)
23.36 (0.920)
Symbol
Minimum
Maximum
φw/φb
0.7
1.4
Window Length
L
1.8 (0.07)
2.3 (0.09)
Absolute Maximum
Codewheel Radius
RC
Window/Bar Ratio
ROP + 1.9 (0.075)
Units
Notes
mm (inch)
mm (inch) Includes eccentricity
errors
5
Mounting Considerations
Figure 2. Mounting Plane Side A.
Figure 3. Mounting Plane Side B.
Figure 4. HEDS-5120 Codewheel.
Figure 5. HEDS-6100 Codewheel.
6
Ordering Information
0 0
HEDT-9001 Option
HEDS-6100 Option
Resolution
(Cycles/Rev)
Shaft Diameter
06 - 1/4 in.
08 - 3/8 in.
A - 500
HEDT-910
Option
0
0
Lead
HEDS-5120 Option
Resolution (Cycles/Rev)
0 - Straight Leads
1 - Bent Leads
A
C - 100 CPR
D - 192 CPR
E - 200 CPR
C
D
E
G
I
*
*
*
*
HEDT-9100
*
*
HEDT-9101
*
*
*
*
*
*
01
02
03
04
05
HEDS-5120
06
08
A
A
C
Shaft Diameter
G - 360 CPR
A - 500 CPR
I - 512 CPR
HEDT-9001
HEDS-6100
09 - 1/2 in.
10 - 5/8 in.
09
10
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
11
14
12
13
*
*
11
12
13
*
01
02
03
04
05
06
*
*
*
*
*
*
*
*
*
*
*
*
D
08
09
10
14
*
*
*
*
E
*
F
*
*
G
*
H
*
I
*
K
*
*
*
*
*
*
*
*
*
*
*
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
(408) 654-8675
Europe: +49 (0) 6441 92460
China: 10800 650 0017
Hong Kong: (+65) 271 2451
India, Australia, New Zealand: (+65) 271 2394
Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only)
Korea: (+65) 271 2194
Malaysia, Singapore: (+65) 271 2054
Taiwan: (+65) 271 2654
Data subject to change.
Copyright © 2002 Agilent Technologies, Inc.
Obsoletes 5988-2577EN
February 11, 2002
5988-5280EN