8 DIP SFF Navigation Sensor

ADNS-5050

Manufacturer Part NumberADNS-5050
Description8 DIP SFF Navigation Sensor
ManufacturerAvago Technologies US Inc.
ADNS-5050 datasheet
 


Specifications of ADNS-5050

Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names516-2261
ADNS-5050
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SQUAL
Address: 0x05
Access: Read
Reset Value: 0x00
Bit
7
Field
SQ
7
Data Type:
Upper 8 bits of a 9-bit unsigned integer.
USAGE:
SQUAL (Surface Quality) is a measure of the number of valid features visible by the sensor in the current
frame. The maximum SQUAL register value is 128. Since small changes in the current frame can result in
changes in SQUAL, variations in SQUAL when looking at a surface are expected. The graph below shows
few sequentially acquired SQUAL values, while a sensor was moved slowly over white paper. SQUAL
is nearly equal to zero, if there is no surface below the sensor. SQUAL is typically maximized when the
navigation surface is at the optimum distance from the imaging lens (the nominal Z-height).
60
50
40
30
20
10
0
1
55
109 163 217 271 325 379 433 487 541 595 649 703 757 811 865
Figure 13. Squal values (white paper).
60
50
40
30
20
10
0
1.6
1.8
2
Delta from Lens Reference Plane to Tracking Surface, Z (mm)
Figure 14. Mean squal vs. Z (white paper).
19
6
5
4
SQ
SQ
SQ
6
5
4
Count
2.2
2.4
2.6
2.8
3
3
2
1
SQ
SQ
SQ
3
2
1
Avg-3sigma
Avg
Avg+3sigma
3.2
3.4
0
SQ
0