HEDS-9000/9100
Two Channel Optical Incremental Encoder Modules
Data Sheet
Description Features
The HEDS-9000 and the HEDS-9100 series are high High performance
performance, low cost, optical incremental encoder
High resolution
modules. When used with a code wheel, these mod-
Low cost
ules detect rotary position. The modules consist of a
lensed (LED) source and a detector IC enclosed in a small Easy to mount
C-shaped plastic package. Due to a highly col limated
No signal adjustment required
light source and unique photode tect or array, these mod-
Small size
ules are extremely tolerant to mounting misalignment.
-40C to 100 C operating temperature
The two channel digital outputs and the single 5 V sup-
Two channel quadrature output
ply input are accessed through fi ve 0.025 inch square
pins located on 0.1 inch centers.
TTL compatible
Standard resolutions for the HEDS-9000 are 500 CPR Single 5 V supply
and 1000 CPR for use with a HEDS-6100 codewheel or
Applications
equivalent.
The HEDS-9000 and 9100 provide sophisticated mo-
For the HEDS-9100, standard resolutions between 96
tion detection at a low cost, making them ideal for high
CPR and 512 CPR are available for use with a HEDS-5120
volume applications. Typical applica tions include print-
codewheel or equivalent.
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 clarifi cation is needed.
ESD WARNING: NORMAL HANDLING PRECAUTIONS SHOULD BE TAKEN TO AVOID STATIC DISCHARGE.YYXX
YYXX
X00
X00
Theory of Operation
The HEDS-9000 and 9100 are C-shaped emitter/detec- The codewheel rotates between the emitter and detec-
tor modules. Coupled with a codewheel, they translate tor, causing the light beam to be interrupted by the pat-
the rotary motion of a shaft into a two-channel digital tern of spaces and bars on the code wheel. The photo-
output. diodes which detect these interruptions are arranged in
a pattern that corresponds to the radius and design of
As seen in the block diagram, each module contains a
the ode wheel. These detectors are also spaced such that
single Light Emitting Diode (LED) as its light source. The
a light period on one pair of detectors corre sponds to a
light is collimated into a parallel beam by means of a
dark period on the adjacent pair of detectors. The photo-
single polycarbon ate lens located directly over the LED.
diode outputs are then fed through the signal process-
Opposite the emitter is the integrated detector circuit.
ing circuitry resulting in A, A, B, and B. Two comparators
This IC consists of multiple sets of photodetectors and
receive these signals and produce the fi nal outputs for
the signal processing circuitry necessary to product the
channels A and B. Due to this integrated phasing tech-
digital waveforms.
nique, the digital output of channel A is in quadrature
with that of channel B (90 degrees out of phase).
Package Dimensions
HEDS-9x00
26.67 (1.05) 8.6 (0.34)
15.2
(0.60)
0.63 (0.025)
2.54 (0.100) TYP.
SQR. TYP.
1.8
1.52 (0.060)
OPTION CODE (0.07)
1.0 (0.04)
2.9
5.1 (0.20)
DATE CODE
2.21
6.9 (0.27)
(0.11)
11.9
(0.087)
2.54
3.73 0.05
(0.47)
20.8 (0.100)
(0.147 0.002)
(0.82)
1.02 0.10
11.7
(0.040 0.004)
8.81
(0.46)
4.75 0.10
5.8
(0.347)
45
(0.187 0.004)
(0.23)
OPTICAL
2.67 (0.105) DIA.
ALIGNING RECESS
CENTER LINE
MOUNTING THRU
ALIGNING RECESS
2.44/2.41 DIA.
C
HOLE 2 PLACES
1.85 (0.073) L 1.78 0.10* 5.46 0.10 2.44/2.41 X 2.79
(0.096/0.095) ALIGNING RECESS
(0.070 0.004) (0.215 0.004) (0.096/0.095 X 0.110) 2.44/2.41 DIA.
2.16 (0.085)
8.64 (0.340)
2.44/2.41 X 2.79
2.16 (0.085) DEEP (0.096/0.095)
DEEP
REF.
(0.096/0.095 X 0.110) 2.92 0.10**
17.27
2.16 (0.085) DEEP
2.16 (0.085) DEEP (0.115 0.004)
(0.680)
OPTICAL 4.11 (0.162)
10.16
20.96
CENTER
OPTICAL CENTER (0.400)
(0.825) 6.35 (0.250) REF.
TYPICAL DIMENSIONS IN MILLIMETERS AND (INCHES)
SIDE A SIDE B
* 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)
HEDS-9x01
26.67 (1.05) 8.6 (0.34)
15.2
(0.60)
0.63 (0.025)
2.54 (0.100) TYP.
4.01 0.20
SQR. TYP.
(0.158 0.008)
1.8
OPTION CODE
1.0 (0.04) (0.07)
5.1 (0.20) 2.9
DATE CODE 2.21
(0.11)
(0.087)
2.54
3.73 0.05
(0.100)
(0.147 0.002) 16.76 0.20
(0.66 0.008)
1.02 0.10
11.7
(0.040 0.004)
8.81
(0.46)
4.75 0.10 5.8
(0.347)
45
(0.187 0.004) (0.23)
2.67 (0.105) DIA. OPTICAL
ALIGNING RECESS
MOUNTING THRU CENTER LINE
2.44/2.41 DIA. ALIGNING RECESS
C
HOLE 2 PLACES
L
(0.096/0.095) 1.85 (0.073) 1.78 0.10 * 5.46 0.10 2.44/2.41 X 2.79 ALIGNING RECESS
(0.070 0.004) (0.215 0.004) (0.096/0.095 X 0.110) 2.44/2.41 DIA.
2.16 (0.085)
8.64 (0.340)
2.44/2.41 X 2.79
2.16 (0.085) DEEP (0.096/0.095)
DEEP
REF.
(0.096/0.095 X 0.110) 2.92 0.10**
17.27
2.16 (0.085) DEEP
2.16 (0.085) DEEP (0.115 0.004)
(0.680)
OPTICAL
4.11 (0.162)
10.16
20.96
CENTER
OPTICAL CENTER (0.400)
6.35 (0.250) REF.
(0.825)
TYPICAL DIMENSIONS IN MILLIMETERS AND (INCHES)
* GAP MEASUREMENT TO THE SURFACE WINDOW = 1.68 0.10 (0.066 0.004)
SIDE A SIDE B
** HEIGHT TO THE WINDOW = 3.02 0.10 (0.119 0.004)
2
V
CC V
CC
5 CH. B
5 CH. B
4 V
CC 4 V
CC
3 CH. A
3 CH. A
2 N.C.
2 N.C.
1 GND
1 GND
GND
GND
HEDS-9X01
HEDS-9X00