HEDS-8940 Avago Technologies US Inc., HEDS-8940 Datasheet - Page 4

• Manufacturer Part Number: HEDS-8940
• Description: Align Tool For M-Aries
• Manufacturer: Avago Technologies US Inc.

Specifications of HEDS-8940

• Accessory Type: Mechanical Alignment Tool
• Product: Tools & Accessories
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: AEDA-3200 Series
• For Use With: AEDA-3200-TBK - IC ENCODER HI-RES 3CH 7500CPRAEDA-3200-TBJ - IC ENCODER HI-RES 3CH 7200CPRAEDA-3200-TB7 - IC ENCODER HI-RES 3CH 6000CPRAEDA-3200-TB1 - IC ENCODER HI-RES 3CH 5000CPRAEDA-3200-TAJ - IC ENCODER HI-RES 3CH 2500CPR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant


Definitions
Count (N): N refers to the cycles per revolution (CPR) of the
encoder output.
One Cycle (C): 360 electrical degrees (°e).
One Shaft Rotation: 360 mechanical degrees, N cycles (rotary
motion only).
Phase (φ): The number of electrical degrees between the
center of the high state on the channel A and the center of
the high state of channel B. This value is nominally 90°e.
Pulse Width (P): The number of the electrical degrees that an
output is a high-level during one cycle, nominally 180°e
or 1/2 a cycle.
Pulse Width Error (∆P): The deviation in electrical degrees of
the pulse width from its ideal value of 180°e.
Index Pulse Width (Po): The number of electrical degrees that
an index is high during one full shaft rotation. This value
is nominally 90°e or 1/4 cycle.
State Width (S): The number of the electrical degrees be-
tween a transition in the output of the 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.
Recommended Operating Conditions
Parameter
Temperature
Supply Voltage
Frequency
Maximum Frequency and RPM
CPR
2500
5000
6000
7200
7500
Note:
1. Maximum frequency will be lower due to limitation in maximum RPM.
2. Maximum mechanical limit is 12000 RPM, operating limit is dependent on the maximum operating frequency.
Maximum Frequency (kHz)
750
750
750
750
750
1
Symbol
T
V
f
A
CC
Min.
-40
4.5
Typical
25
5.0
125
Maximum RPM
12000
9000
7500
6250
6000
Direction of Motor Rotation
When the codewheel rotates in a clockwise direction,
channel A will lead channel B (Figure 1 illustrates the defi-
nition of clockwise direction of codewheel rotation). When
the codewheel rotates in a counter-clockwise direction,
channel B will lead channel A.
Figure 1. Viewed from the PCB encoder end.
Absolute Maximum Ratings
Storage Temperature
Operating Temperature
Supply Voltage
Output Voltage
Output Current per Channel
Frequency
Max.
125
5.5
750
2
Units
°C
Volts
kHz
Notes
Ripple <100 mVp-p
f = RPM x CPR
-40°C to 125°C
-40°C to 125°C
4.5 V to 5.5 V
-0.5 V to V
20 mA
750 kHz
60
cc