AEDR-8500-102 Avago Technologies US Inc., AEDR-8500-102 Datasheet - Page 5

• Manufacturer Part Number: AEDR-8500-102
• Description: IC,Gt90e,Reel,304LPI,100pc
• Manufacturer: Avago Technologies US Inc.

Specifications of AEDR-8500-102

• Number Of Channels: 3
• Mounting Style: SMD/SMT
• Output: Incremental
• Supply Voltage: 7 V
• Operating Temperature Range: - 20 C to + 85 C
• Product: Optical
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Codewheel Characteristics
The most important dimension to remember is that the index (I) channel pattern on the codewheel, the width angle is
made up of 3 x W
Index track width angle is made up of 3 x W
Codewheel Design Example
The following example demonstrates a codewheel design for a Rop of 11 mm @ 828 CPR for a typical 2 channels encoder.
In the case for an index track design, special index tracks have to be utilized.
Codewheel pattern for a 2 channels encoder
Notes:
a). 2 tracks from the original 828 CPR, 2 channels codewheel design have been utilized for the special track(Index), but CPR remains the same.
5
828 CPR
B
° (opaque-non reflective region)
Lw
Reflective (Ni)
B
°
Opaque (Cu)
0.21739°
0.43478°
.
L
Caution: As the Index track is generated by utilizing the 3xW
W
= 1.8 mm (minimum)
region, any dirt that blocked the tracks resulting in the encoder’s detector sensing
a 3x W
Codewheel pattern for a 3 channels encoder
Special track
B
will result in another erroneous Index.
828 CPR
826 X 0.43478°
B
(opaque – non reflective)
Reflective (Ni)
Opaque (Cu)
0.652174°
0.21739°