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參數資料
| 型號： | QEDS-9871 |
| 英文描述： | Small Optical Encoder Modules |
| 中文描述： | 小型光學編碼器模塊 |
| 文件頁數： | 3/12頁 |
| 文件大小： | 283K |
| 代理商： | QEDS-9871 |
3
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.
Pulse Width Error (
P): The
deviation, in electrical degrees, of
the pulse width from its ideal
value of 180
°
e.
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.
State Width Error (
S): The
deviation, in electrical degrees, of
each state width from its ideal
value of 90
°
e.
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.
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.
Absolute Maximum Ratings
Parameter
Symbol
Min.
Max. Units
Notes
Storage Temperature
T
S
T
A
-40
85
°
C
°
C
See Note
Operating
Temperature
-40
85
See Note
Supply Voltage
V
CC
V
O
I
O
-0.5
7
V
Output Voltage
-0.5
V
CC
5
V
Output Current per
Channel
-1.0
mA
Soldering Temperature
260
°
C
t
≤
5 sec.
Output Waveforms
Definitions
Count (N) = The number of bar
and window pairs or counts per
revolution (CPR) of the
codewheel, or the number of lines
per inch of the codestrip (LPI).
1 Shaft Rotation = 360
mechanical
degrees
= N cycles
1 cycle (c) = 360 electrical
degrees (
°
e)
= 1 bar and
window pair
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