PixArt Imaging Inc.
ADNS-9500 Laser Gaming Sensor
Eye Safety
The ADNS-9500 sensor and the associated components
in the schematic of Figure 6 are intended to comply with
Class 1 Eye Safety Requirements of IEC 60825-1.
PixArt
Imaging
calibrates the sensor’s laser output power
(LOP) to Class 1 eye safety level and store the registers
values that control the LOP prior shipping out, thus no
LOP calibration is required in complete mouse system at
manufacturer site.
ADNS-9500 sensor is designed to maintain the laser
output power using ADNS-6190-002 lens within Class 1
Eye Safety requirements over components manufactur-
ing tolerances under the recommended operating con-
ditions and application circuits of Figure 6 as specified in
this document. Under normal operating conditions, the
sensor generates the drive current for the VCSEL. Increas-
ing the LOP by other means on hardware and software
can result in a violation of the Class 1 eye safety limit of
716W. For more information, please refer to Eye Safety
Application Note.
Figure 7. Block diagram of ADNS-9500
Regulatory Requirements
Passes FCC B and worldwide analogous emission limits
when assembled into a mouse with shielded cable and
following
PixArt
recommendations.
Passes IEC-1000-4-3 radiated susceptibility level when
assembled into a mouse with shielded cable and
following
PixArt
recommendations.
Passes EN61000-4-4/IEC801-4 EFT tests when
assembled into a mouse with shielded cable and
following
PixArt
recommendations.
Passes IEC-61000-4-2 Electrostatic Discharge Immunity
Test (ESD) and provides sufficient ESD creepage/
clearance distance to withstand discharge up to 15KV
when assembled into a mouse according to usage
instructions above.
Passes IEC/EN 60825-1 Eye Safety Class 1 when
operating with the laser output power pre-calibrated
by
PixArt Imaging
without external hardware and
software control of laser current.
LASER Drive Mode
The laser is driven in pulsed mode during normal operation.
A calibration mode is provided which drives the laser in
continuous (CW) operation for testing purpose.
The default setting of laser is in Forced_Disable mode,
which the laser is turned OFF. The laser have to be turned
ON during power up sequence by setting Forced_ Disabled
bit (Bit-0) of LASER_CTRL0 register to 0.
Disabling the LASER
LASER_NEN is connected to the gate of an external P-
channel MOSFET transistor which, when ON connects
REFB to the laser. In normal operation, LASER_NEN is low.
In the case of a fault condition, LASER_NEN goes high to
turn the transistor off and disconnect REFB from the laser.
Design Considerations for Improving ESD Performance
For improved electrostatic discharge performance, typical
creepage and clearance distance are shown in the table
below. Assumption: base plate construction as per the
PixArt
supplied 3D model file when use with ADNS-
6190-002 lens. The lens flange can be sealed (i.e. glued)
to the base plate. Note that the lens material is polycar-
bonate and therefore, cyanoacrylate based adhesives or
other adhesives that may damage the lens should NOT be
used.
Typical Distance (mm)
Creepage
Clearance
ADNS-6190-002
17.3
1.8
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8
PixArt Imaging Inc.
E-mail:
fae_service@pixart.com.tw
PIXART [ PIXART IMAGING INC. ]
