Datasheet

Microphotonic Devices (Light Convergent Reflective Sensor)
EY3A-1081
Be sure to read Precautions on page 24.
■ Dimensions
■ Features
Note: All units are in millimeters unless otherwise indicated.
• Ensures higher sensitivity and external light interference resistivity
than any other photomicrosensor.
• Narrow sensing range ensures stable sensing of a variety of sensing objects.
Center of detector
Positioning boss
■ Absolute Maximum Ratings (Ta = 25°C)
7.9 dia.
8.3 dia.
Center of emitter
3.2
Item
+0.2
0 dia.
Pin no.1
Symbol
Rated value
Power supply voltage
VCC
7V
Load voltage
VOUT
7V
Load current
IOUT
10 mA
Operating
Topr
0°C to 60°C
Storage
Tstg
–15°C to 70°C
Ambient temperature
Note: Make sure there is no icing or condensation when operating the
Sensor.
3
Pin no. Remarks
0
-0.2
dia.
Name
1
O
Output (OUT)
2
3
V
G
Power supply (Vcc)
Ground (GND)
Unless otherwise specified, the
tolerances are as shown below.
Dimensions
Tolerance
3 mm max.
±0.3
3 < mm ≤ 6
±0.375
6 < mm ≤ 10
±0.45
10 < mm ≤ 18
±0.55
18 < mm ≤ 30
±0.65
30 < mm ≤ 50
±0.8
50 < mm ≤ 80
±0.95
Recommended Mating Connectors:
Japan Molex 51090-0300 (crimp connector)
52484-0310 (press-fit connector)
■ Electrical and Optical Characteristics (Ta = 0°C to 60°C)
Item
Value
Condition
Power supply voltage
5 V ±5%
---
Current consumption
50 mA max.
VCC = 5 V, RL = ∞
Peak current consumption
200 mA max.
VCC = 5 V, RL = ∞
Low-level output voltage
0.6 V max.
VCC = 5 V, IOL = 4 mA (see note 1)
High-level output voltage
3.5 V min.
VCC = 5 V, RL = 4.7 kΩ (see note 2)
Response delay time (High to Low)
1.5 ms max.
The time required for the output to become “Lo” after placing
sensing object.
Response delay time (Low to high)
1.5 ms max.
The time required for the output to become “Hi” after removing
sensing object.
Note: 1. These conditions are for the sensing of lusterless paper with an OD of 0.7 maximum located at the correct sensing position of the Sensor
as shown in the optical path arrangement on page 199.
2. These conditions are for the sensing of the paper supporting plate with an OD of 0.05 located using the glass plate without paper as
shown in the optical path arrangement on page 199.
198
EY3A-1081 Microphotonic Devices (Light Convergent Reflective Sensor)
■ Characteristics (Paper Table Glass: t = 6 mm max., Transparency Rate: 90% min.)
(Ta =0°C to 60°C)
Item
Characteristic value
Sensing density
Lusterless paper with an OD of 0.7 max. (sensing distance: 80 mm) (see note)
Non-sensing distance
120 mm (from the top of the sensor), OD: 0.05
Paper sensing distance
80 mm (from the top of the sensor)
Ambient illumination
Sunlight: 3,000 lx max., fluorescent light: 2,000 lx max.
Note: 1. The data shown are initial data.
2. Optical darkness (OD) is defined by the following formula:
OD = − log10
POUT
PIN
PIN (mW):Light power incident upon the document
POUT (mW):Reflected light power from the document
■ Optical Path Arrangement
120 (see note 2)
80 (Standard value)
10 dia. (see note 1)
Paper supporting plate
Glass
Note: 1. The part with oblique lines indicates the paper sensing area of the EY3A-1081, which is practically determined by the diameter of the
beam and its tolerance.
2. The non-sensing distance of the EY3A-1081 is determined using a paper with an OD of 0.05.
■ Engineering Data
OD (value)
Distance Characteristics (Typical)
4.75 V
5.0 V
5.25 V
Distance (mm)
EY3A-1081 Microphotonic Devices (Light Convergent Reflective Sensor)
199
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