5
Eye Safety
The ADNS-6000 and the associated components in the
schematic of Figure A1 are intended to comply with Class
1 Eye Safety Requirements of IEC 60825-1. Avago Tech-
nologies suggests that manufacturers perform testing to
verify eye safety on each mouse. It is also recommended
to review possible single fault mechanisms beyond those
described below in the section “Single Fault Detection”.
Under normal conditions, the ADNS-6000 generates the
drive current for the laser diode (ADNV-6340). In order to
stay below the Class 1 power requirements, resistor Rbin
must be set at least as high as the value in the bin table,
based on the bin number of the laser diode and LP_CFG0
and LP_CFG1 must be programmed to appropriate values.
Avago Technology recommends using the exact Rbin
value specifi ed in the bin table to ensure suffi
cient laser
power for navigation. The system comprised of the ADNS-
6000 and ADNV-6340 is designed to maintain the output
beam power within Class 1 requirements over component
manufacturing tolerances and the recommended tem-
perature range when adjusted per the procedure below
and when implemented as shown in the recommended
application circuit of Figure A1. For more information,
please refer to Eye Safety Application Note 5088.
Figure 5. Distance from lens reference plane to surface
While reassembling the components, please make sure
that the Z height (Distance from lens reference plane to
surface) is valid. Refer to Figure 5.
Sensor
Sensor PCB
2.40
0.094
Lens
Surface
VCSEL PCB
VCSEL
VCSEL Clip
Enabling the SROM
The ADNS-6000 must operate from the externally loaded
programming. This architecture enables immediate
adoption of new features and improved performance
algorithms. The external program is supplied by Avago
Technologies as a fi le which may be burned into a pro-
grammable device. A microcontroller with suffi
cient
memory may be used. On power-up and reset, the ADNS-
6000 program is downloaded into volatile memory using
the burst-mode procedure described in the Synchronous
Serial Port section. The program size is 1986 x 8 bits.
For more information, please refer to the ADNS-6000
datasheet.
Regulatory Requirements
Passes FCC B and worldwide analogous emission limits
when assembled into a mouse with shielded cable and
following Avago Technologies recommendations.
•
Passes IEC-1000-4-3 radiated susceptibility level when
assembled into a mouse with shielded cable and
following Avago Technologies recommendations.
•
Passes EN61000-4-4/IEC801-4 EFT tests when
assembled into a mouse with shielded cable and
following Avago Technologies recommendations.
•
UL fl ammability level UL94 V-0.
•
Provides suffi
cient ESD creepage/clearance distance
to avoid discharge up to 15kV when assembled into a
mouse according to usage instruction above.
