SCLK
SERIAL PORT
SDIO
XA
QUADRATURE
OUTPUT
OSC_IN
SERIAL PORT
OSCILLATOR
OSC_OUT
REFA
VOLTAGE REGULATOR
AND POWER CONTROL
RESONATOR
POWER ON
RESET
XB
QUADRATURE
OUTPUTS
YA
YB
R_BIN
LED
XY_LED
REFB
PD
V
DD
GND
GND
VOLTAGE
REFERENCE
IMAGE
PROCESSOR
LED
DRIVE
5 VOLT
POWER
Figure 6. Block diagram of ADNS-2051 optical mouse sensor.
Design Considerations for Improving
ESD Performance
The flange on the lens has been
designed to increase the creepage
and clearance distance for elec-
trostatic discharge. The table on
the right shows typical values
assuming base plate construction
per the Agilent supplied IGES file
and HDNS-2100 lens flange.
Typical Distance
Creepage
Clearance
Millimeters
16.0
2.1
and therefore, cyanoacrylate-
based adhesives or other
adhesives that may damage the
lens should NOT be used.
The trimmed lens, HDNS-
2100#001, is not recommended
for corded applications due to the
ESD spec requirement.
For improved ESD performance,
the lens flange can be sealed (i.e.
glued) to the base plate. Note that
the lens material is polycarbonate
SENSOR
CLIP
LED
PCB
LENS/LIGHT PIPE
BASE PLATE
SURFACE
Figure 7. PCB assembly.
5
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
