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AEDR-8400-142

P1-P3P4-P6P7-P8
4
Recommended Codewheel and Codestrip Characteristics
Parameter Symbol Min. Max. Unit Notes
Window/bar Ratio Ww/Wb 0.9 1.1
Window/bar Length L
W
1.80 (0.071) 2.31 (0.091) mm (inches)
Specular Reectance R
f
60 - Reective area.
See note 1.
- 10 Non reective area
Line Density LPmm (LPI) 10 (254)
12.5 (318)
lines/mm (inch)
Optical radius Rop 11 - mm Recommended
Rop=11.0mm
Notes:
1. Measurements from SMS µScan System. Contact factory for more information.
2. Contact factory for more information on compatibility of codewheel/strip.
Encoding Characteristics
Encoding characteristics over the recommended operating condition and mounting conditions.
Parameter Symbol Typical Maximum Unit
Pulse Width Error (Channel A) ∆P 10 75 °e
Pulse Width Error (Channel B) ∆P 11 80 °e
Phase Error
∆φ
7 60 °e
Note:
1. Typical values represent the encoder performance at typical mounting alignment, whereas the maximum values represent the encoder perfor-
mance across the range of recommended mounting tolerance.
Electrical Characteristics
Characteristics over recommended operating conditions at 25°C.
Parameter Symbol Min. Typ. Max. Unit Notes
Detector Supply Current Icc 6.0 7.0 mA
High Level Output Voltage V
OH
2.4 V I
OH
= -0.2mA
Low Level Output Voltage V
OL
0.4 V I
OL
= 8.0mA
Rise Time t
r
400 ns C
L
= 25pF
Fall Time t
f
120 ns R
L
= 2.7kW
L
W
W
W
, Reective area
W
b
, Non-reective area
W
W
= W
B
= 50µm (254LPI)
Codestrip
= 40µm (318LPI)
5
Outline Drawing
LED Current Limiting Resistor
A resistor to limit current to the LED is required. The recommended value is 121W (±1%) for 254 LPI and 255Ω (±1%)
for 318 LPI. The resistor should be placed in series between the 2.8 V supply and pin 1 of the device (V
LED
). This will
result in an LED current of approximately 6mA.
Moisture Sensitive Level
The AEDR-8400 is specied to moisture sensitive level (MSL) 3.
Encoder Pin Conguration
Encoder option Pin 1 Pin2 Pin3 Pin4 Pin5 Pin6
AEDR-8400 VLED Gnd Ch B Ch A V
CC
Gnd
LED
Pin 1 Indication (Top View):
i) Refer to the incorporated chamfer, or
ii) Refer to the upper left pin closer to the emitter;
as shown in the diagram.
* All dimensions in millimeter.
Tolerance x.xx ± 0.10 mm.
Bottom View
6
Encoder Orientation
The AEDR-8400 is designed such that both the emitter and detector IC should be placed parallel to the window/bar
orientation, as shown. As such, the encoder is tolerant against radial play of ± 0.20mm.
Direction of Movement
With the emitter side of the encoder placed closer to the codewheel centre, Channel A leads Channel B when the
codewheel rotates anti-clockwise and vice versa.
Rotation
Linear Scale
Rotation
Linear Scale
Top View
Note: Drawing not to scale.
Anti-clockwise
Ch. A leads
Ch. B
emitter
Codewheel
Clockwise
Ch. B leads
Ch. A
emitter
Codewheel
Note: Drawing not to scale.
Top View
Ch. B leads
Ch. A
emitter
To left
Codestrip
To right
emitter
Ch. A leads
Ch. B
Codestrip
P1-P3P4-P6P7-P8

AEDR-8400-142

Mfr. #:
Buy AEDR-8400-142
Manufacturer:
Broadcom / Avago
Description:
Optical Sensors Optical Switches, Reflective, Photo IC Output 2 Channel 318LPI
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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