STV-366-R01 STMICROELECTRONICS [STMicroelectronics], STV-366-R01 Datasheet - Page 25

• Manufacturer Part Number: STV-366-R01
• Description: 1.8V optical mouse sensor
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

VT5366
8
8.1
8.2
8.3
LED selection
Overview
There are a number of LEDs from a range of suppliers which will work well with the VT5366.
It is the responsibility of the customer to ensure that the chosen LED works in their specific
implementation. There are various price/performance trade-offs which may be made if the
customer chooses to do so.
Key LED parameters
The VT5366 system requires a bright visible RED LED in a standard 5 mm (T1 3/4)
package. The ideal viewing angle is 20
forward current of 20mA. The key LED parameters are listed in
Table 19.
VCSEL & IR Illumination
The 366 sensor will operate over a wide range of illuminant wavelengths. For devices
operating at approx 850nm (IR LED or VCSEL), the on-die automatic exposure controller
(AEC) will compensate for the change in sensitivity compared to 640nm (red LED).
Navigation performance may be improved by increasing the illuminated device drive.
Diameter
Length
Material
Luminous intensity (@20mA)
Viewing angle
Mechanical accuracy
Color
Wavelength
Relative Illumination at sensor
plane for a circle of 1.1 mm
diameter
Parameter
Key LED parameters
5 mm
8.6 mm
AlInGaP
900 mcd
20
+/- 2
Red
640 nm +/- 50 nm
≥
80%
o
Recommended value
o
o
and the intensity should be at least 900mcd at a
Important for fit with lens
Important for fit with lens
For long-term reliability
Minimum value
Half intensity
Accuracy of the die positioning
within the LED body
Illumination value required for
Red/IR Led and VCSEL
Table 19
.
Notes
LED selection
25/30