HEDS-9731-A50 [AVAGO]
Rotary Position Encoder, Single, 2 Channels, PLASTIC PACKAGE-4;
| 型号： | HEDS-9731-A50 |
| 厂家： | 
AVAGO TECHNOLOGIES LIMITED |
| 描述： | Rotary Position Encoder, Single, 2 Channels, PLASTIC PACKAGE-4 编码器 光电 |
| 文件： | 总12页 (文件大小：291K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Small Optical Encoder Modules
Technical Data
HEDS-973x Series
Features
• Small Size
• High Resolution Version of
the HEDS-970x
• Two Channel Quadrature
Output
• TTL Compatible
• Single 5 V Supply
• Wave Solderable
• Low Cost
• Multiple Mounting Options
• Wide Resolution Range
• Linear and Rotary Options
Available
• No Signal Adjustment
Required
Description
• Insensitive to Radial and
The HEDS-973x series is a high
Mounting Option #50 - Standard (Baseplane Mounting)
Contact Factory for Detailed Package Dimensions
ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE.
2
with either a codewheel or
Applications
The HEDS-973x provides
rotary motion into a two-channel
digital output. Coupled with a
codestrip, it translates linear
motion into a digital output.
codestrip, this module detects
rotary or linear position. The
module consists 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 a unique photo-
detector array, the module is
extremely tolerant to mounting
misalignment.
sophisticated motion detection at
a low cost, making closed-loop
control very cost-competitive!
Typical applications include
printers, plotters, copiers, and
office automation equipment.
As seen in the block diagram, the
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 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
produce the digital waveforms.
.
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.
The two channel digital outputs
and 5 V supply input are accessed
through four solder-plated leads
located on 2.54 mm (0.1 inch)
centers.
The standard HEDS-973x is
designed for use with an 11 mm
optical radius codewheel, or
linear codestrip. Other options
are available. Please contact
factory for more information.
The codewheel/codestrip moves
between the emitter and detector,
causing the light beam to be inter-
rupted by the pattern of spaces
and bars on the codewheel/code-
strip. The photodiodes which
detect these interruptions are
arranged in a pattern that corre-
sponds to the radius and count
density of the codewheel/code-
strip. 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 fed through the signal
processing circuitry. Two com-
parators 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 channel B (90
degrees out of phase).
Theory of Operation
The HEDS-973X is a C-shaped
emitter/detector module. Coupled
with a codewheel, it translates
Block Diagram
3
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.
Output Waveforms
Phase Error (∆φ): The deviation of
the phase from its ideal value of
90°e.
Direction of Rotation: When the
codewheel rotates counterclock-
wise, as viewed looking down on
the module (so the marking is
visible), 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.
Definitions
Pulse Width Error (∆P): The
deviation, in electrical degrees, of
the pulse width from its ideal
value of 180°e.
Count (N) = The number of bar
and window pairs or counts per
revolution (CPR) of the
Angular Misalignment Error (EA):
angular misalignment of the sensor
in relation to the tangential
direction. This applies for both
rotary and linear motion.
codewheel, or the number of lines
per inch of the codestrip (LPI).
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.
1 Shaft Rotation = 360
mechanical
Mounting Position (RM): Distance
from Motor Shaft center of rotation
to center of Alignment Tab
receiving hole.
degrees
= N cycles
1 cycle (c) = 360 electrical
degrees (°e)
= 1 bar and
State Width Error (∆S): The
deviation, in electrical degrees, of
each state width from its ideal
value of 90°e.
window pair
Pulse Width (P): The number of
electrical degrees that an output
is high during one cycle. This
value is nominally 180°e or 1/2
cycle.
4
Absolute Maximum Ratings
Parameter
Symbol Min. Max. Units
Notes
85
70
85
70
7
Option A & Q
Storage Temperature
TS
TA
-40
-40
°C
°C
All Other Options
Option A & Q
Operating Temperature
All Other Options
Supply Voltage
Output Voltage
VCC
VO
IO
-0.5
-0.5
-1.0
V
V
VCC
5
Output Current per
Channel
mA
Soldering Temperature
260
°C
t ≤ 5 sec.
Recommended Operating Conditions
Parameter
Symbol Min.
Typ.
Max.
Units
Notes
Option A & Q
85
70
Temperature
T
-40
4.5
°C
All Other Options
Ripple < 100 mVp-p
3.2 kΩ pull-up
Supply Voltage
VCC
CL
5.0
5.5
100
40
V
Load Capacitance
Count Frequency
Angular Misalignment
pF
kHz
deg.
(Velocity (rpm) x N)/60
EA
-2.0
0.0
+2.0
c
Shaft
0.13 mm (0.005”)
ROP -0.14
(ROP -0.006)
L
mm
Mounting Position
RM
(inch)
See Mounting Considerations
Note: The module performance is specified at 40 kHz but can operate at higher frequencies.
Electrical Characteristics
Electrical Characteristics over Recommended Operating Range, Typical at 25°C.
Parameter
Supply Current
Symbol
Min. Typ.
Max. Units
Notes
Option A & Q
17
40
mA
85
ICC
57
All Other Options
IOH = -200 µA
IOL = 3.86 mA
High Level Output Voltage
Low Level Output Voltage
Rise Time
VOH
VOL
tr
2.4
V
0.4
V
180
40
ns
ns
CL = 25 pF,
RL = 3.3 kΩ pull-up
Fall Time
tf
5
Encoding Characteristics
Encoding Characteristics over Recommended Operating Condition and recommended mounting tolerances.
These characteristics do not include codewheel/codestrip contribution. The Typical Values are averages over
the full rotation of the codewheel. For operation above 40 kHz, see frequency derating curves.
Parameter
Pulse Width Error
Logic State Width Error
Phase Error
Symbol
∆P
Typical
Maximum
Units
°e
5
3
2
45
45
15
∆S
°e
∆φ
°e
Note: 3.3 kΩ pull-up resistors used on all encoder module outputs.
Frequency Derating Curves
Typical performance over extended operating range. These curves were derived using a 25 pF load with a
3.3 k pull-up resistor. Greater load capacitances will cause more error than shown in these graphs.
A
B
0
15
10
5
-40 °C
+25 °C
-40 °C
+85 °C
-5
+25 °C
+85 °C
-10
-15
0
-5
0
50
100
150
200
0
50
100
150
200
FREQUENCY (KHz)
FREQUENCY (KHz)
6
Recommended Codewheel and Codestrip Characteristics
Parameter
Window/Bar Ratio
Symbol
Ww/Wb
Lw
Min.
Max.
Units
Notes
0.7
1.4
Window Length (Rotary)
1.80
2.30
mm
(0.071)
(0.091)
(inch)
Absolute Maximum Codewheel
Radius (Rotary)
Rc
W1
W2
L
Rop + 3.40
(Rop + 0.134) (inch)
mm
Includes eccen–
tricity errors
Center of Post to Inside
Edge of Window
1.04
(0.041)
mm
(inch)
Center of Post to Outside
Edge of Window
0.76
(0.030)
mm
(inch)
Center of Post to Inside Edge
of Codestrip
3.60
(0.142)
mm
(inch)
Optional Packages Available
(OPTICAL
CENTER)
3.8
0.150
10.8
0.425
0.50
0.020
2.8
0.110
3.0
0.118
φ
PIN 1 IDENTIFIER
0.8
0.031
5.5
0.217
h
7.0
0.276
6.40
0.252
12.6
0.496
4.34
0.171
4.2
0.167
3.9
0.152
0.14
0.006
1.7
0.067
15.0
0.591
7.5
0.295
3.9
0.154
2.00
2X φ
0.079
1.8
0.071
20.2
0.795
10.1
0.398
0.25
0.010
9.8
0.386
LEAD THICKNESS:
MILLIMETERS
INCHES
DIMENSIONS ARE
Mounting Option #51 – Screwmount (Baseplane Mounting)
7
Optional Packages Available (cont'd.)
Mounting Option #52 – Backplane (Backplane Mounting)
Mounting Option #53 – Standard with Posts (Baseplane Mounting)
8
Optional Packages Available (cont'd.)
Mounting Option #54 – Tabless (Baseplane Mounting)
Mounting Option #55 – Backplane with Posts (Backplane Mounting)
9
Bent Lead Option
Mounting Considerations
4.44 ±0.13
0.175 ±0.005
Rm
IMAGE SIDE OF
CODEWHEEL/CODESTRIP
CENTER OF ROTATION
MOTOR SHAFT CENTER
– A –
E
A
ALIGNMENT TAB RECEIVING HOLE
A
0.13 mm (0.005")
For linear motion, angular misalignment, EA, must be ≤ ± 2 degrees to achieve Encoding Characteristics.
All dimensions for mounting the module and codestrip should be measured with respect to the two mounting posts, shown above.
Recommended Screw Size: M2.5 x 0.45 or 2-56
10
Recommended Wave
Solder Conditions
Flux – RMA Water Soluble (per
MIL-F-14256D)
Process Parameters
1. Flux
2. Pre-heat 60 seconds total
Nominal preheat temp: 90°C
Min: 85°C Max: 110°C
3. Solder Pot Zone
Nominal dip in time:
2.5 - 4.5 seconds
Min: 2.5 seconds
Max: 5 seconds
PCB top side: 140 -160°C
PCB bottom side: 240 - 260°C
4. Wave Solder 255°C,
1.2 meters/minute line speed
5. Hot Water Wash
1st: 30°C 45 seconds
2nd: 70°C 90 seconds
6. Rinse
1st: 23°C 45 seconds
2nd: 23°C 45 seconds
7. Dry
1st: 80°C 105 seconds
2nd: 95°C 105 seconds
11
Ordering Information
HEDS-973
Option
Lead Bend
Resolution Options
Mounting Options
50 – Standard
51 – Screwmount
52 – Backplane
53 – Standard w/Posts
54 – Tabless
55 – Backplane w/Posts
0 – Straight Leads
A – 500 CPR, 11 mm Rop
B – 1000 CPR, 11 mm Rop
J – 1024 CPR, 11 mm Rop
Q– 180 LPI, Linear
1 – Bent Leads
2 – Straight Leads
3 – Bent Leads
2 – 300 LPI, Linear
1 – 360 LPI, Linear
T – 2000 CPR, 23.36 mm Rop
U – 2048 CPR, 23.36 mm Rop
Note: Please contact factory for codewheel and codestrip information.
50
*
51
52
53
54
55
HEDS-9730
HEDS-9731
HEDS-9732/33
A
Q
2
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B
J
A
Q
2
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1
B
J
T
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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) 6271 2451
India, Australia, New Zealand: (+65) 6271 2394
Japan: (+81 3) 3335-8152(Domestic/Interna-
tional), or 0120-61-1280(Domestic Only)
Korea: (+65) 6271 2194
Malaysia, Singapore: (+65) 6271 2054
Taiwan: (+65) 6271 2654
Data subject to change.
Copyright © 2002 Agilent Technologies, Inc.
Obsoletes 5988-5852EN
October 2, 2002
5988-8044EN
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