ADNS-2620 Avago Technologies US Inc., ADNS-2620 Datasheet - Page 27

• Manufacturer Part Number: ADNS-2620
• Description: Optical Mouse Sensor,DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-2620

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 516-2238-5; ADNS-2620; Q2073278A

The maximum value of the shutter is dependent upon
the clock frequency. The formula for the maximum
shutter value is:
Frames/second
000
11
9
Frame_Period
Access: Read/Write
Data Type: Eight bit ’s complement number that represents the upper 8 bits of a 1 bit counter.
USAGE:
Frame Rate
(frames/sec)
9
11
000
Note:
To optimize tracking performance on dark surfaces, it is recommended that an adaptive frame rate based on shutter value be implemented for frame rates greater than 100.
Changing the frame rate results in changes in the maximum speed, acceleration limits, and dark surface performance.
Ordering Information
Specify part number as follows:
ADNS-2620 = 8-pin staggered dual inline package (DIP), 40 per tube.
For product information and a complete list of distributors, please go to our web site:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies Limited in the United States and other countries.
Data subject to change. Copyright © 00-008 Avago Technologies Limited. All rights reserved. Obsoletes 989-098EN
AV0-111EN - March 7, 008
Max shutter value =
Frame Rate
Clock Rate
The frame period counter counts up until it overflows. Units are clock cycles. The formula is:
Field
Bit
= Counts (decimal) --> Counts (hex) --> Counts (2’s complement hex)
FP
7
7
Decimal

197
1
Frame Rate
clock freq
Max Shutter
Clocks/Frame
Decimal
0
187
8000
FP


– 3476
Hex
0x11AC
0x0D
0xF07C
Address: 0x4b
Reset Value: 0xc2
FP


Clocks/Frame
(2’s complement hex)
O
C
E0
Shutter
Upper
11
0
F0
FP


www.avagotech.com
For a clock frequency of 24 MHz, the following table
shows the maximum shutter value. 1 clock cycle is 41.67
nsec.
Lower
AC
D
7C
FP


<-- Maximum Frame Time
<-- Nominal Frame Time
FP


<-- Default Max Shutter
FP
1
1
FP
0
0