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PDF ADNS-3550 Data sheet ( Hoja de datos )
| Número de pieza | ADNS-3550 | |
| Descripción | Low Power LED Integrated Slim Mouse Sensor | |
| Fabricantes | Avago | |
| Logotipo |  |
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ADNS-3550
Low Power LED Integrated Slim Mouse Sensor
Data Sheet
Description
The ADNS-3550 LED optical mouse sensor is a small form
factor (SFF) LED illuminated navigation system.
The ADNS-3550 is a low-power optical navigation
sensor. It has a new, low-power architecture and auto-
matic power management modes, making it ideal for
battery-and power-sensitive applications such as cord-
less input devices.
The ADNS-3550 is capable of high-speed motion detec-
tion — up to 20 ips and 8g. In addition, it has an on-
chip oscillator and integrated LED to minimize external
components.
The ADNS-3550, along with the ADNS-3150-001 lens,
form a complete and compact mouse tracking system.
There are no moving parts which means high reliabil-
ity and less maintenance for the end user. In addition,
precision optical alignment is not required, facilitating
high volume assembly.
The sensor is programmed via registers through a four-
wire serial port. It is packaged in a 16 I/O surface mount-
able package.
Theory of Operation
The ADNS-3550 is based on Optical Navigation Technol-
ogy, which measures changes in position by optically
acquiring sequential surface images (frames) and math-
ematically determining the direction and magnitude of
movement.
The ADNS-3550 contains an Image Acquisition System
(IAS), a Digital Signal Processor (DSP), and a four wire
serial port.
The IAS acquires microscopic surface images via the lens
and illumination system. These images are processed
by the DSP to determine the direction and distance of
motion. The DSP calculates the Dx and Dy relative dis-
placement values.
An external microcontroller reads the Dx and Dy infor-
mation from the sensor serial port. The microcontroller
then translates the data into PS2, USB, or RF signals
before sending them to the host PC or game console.
Features
• Low power architecture
• Small form factor
• Surface mount technology (SMT) device
• Self-adjusting power-saving modes for longest
battery life
• High speed motion detection up to 20 ips and 8g
• Self-adjusting frame rate for optimum performance
• Motion detect pin output
• Internal oscillator — no clock input needed
• Selectable 500 and 1000 cpi resolution
• Wide operating voltage: 2.7 V - 3.6 V nominal
• Four wire serial port
• Minimal number of passive components
• Integrated chip-on-board LED
Applications
• Optical mice
• Optical trackballs
• Integrated input devices
• Battery-powered input device
1 page  
Figure 5a. Exploded top view
Figure 5b. Exploded bottom view
ADNS-3550
ADNS-3150-001
CUSTOMER-
SUPPLIED
BASE PLATE
ADNS-3550
ADNS-3150-001
CUSTOMER-
SUPPLIED
BASE PLATE
5 Page 
DC Electrical Specifications
Electrical Characteristics over recommended operating conditions. Typical values at 25°C, VDD = 2.85 V.
Parameter
Symbol Min. Typical Max. Units Notes
DC Supply Current
in Various Modes
IDD_RUN
IDD_REST1
IDD_REST2
IDD_REST3
3.6 10 mA Average current, including LED current.
0.6 1.8
No load on MISO, MOTION
0.15 0.40
0.04 0.15
Peak Supply Current
40 mA Peak current in 100 kHz bandwidth,
including LED current
Shutdown Supply
Current
IDDSHTDWN
1 12 µA SCLK, MOSI and NCS must be within 300
mV of GND or VDD. SHTDWN must be
within 300 mV of VDD
Input Low Voltage
VIL
0.5 V
SCLK, MOSI, NCS, SHTDWN
Input High Voltage
VIH
VDD – 0.6
V SCLK, MOSI, NCS, SHTDWN
Input Hysteresis
VI_HYS
100 mV SCLK, MOSI, NCS, SHTDWN
Input Leakage
Current
Ileak
±1
±10 µA
Vin = VDD - 0.6 V, SCLK, MOSI, NCS,
SHTDWN
Output Low Voltage VOL
0.7 V
Iout = 1 mA, MISO, MOTION
Output High Voltage VOH
VDD – 0.7
V Iout = -1 mA, MISO, MOTION
Input Capacitance
Cin
10 pF MOSI, NCS, SCLK, SHTDWN
ADNS-3550 RESOLUTION
700
600
500
400
300
200
100
0
0.77 0.87 0.97 1.07 1.17 1.27 1.37 1.47 1.57 1.67 1.77 1.87 1.97
Z-HEIGHT (mm)
Figure 9. Mean resolution vs. Z
WHITE PAPER
MANILA
WHITE FORMICA
BLACK COPY
WHITE PINE
TYPICAL PATH DEVIATION
LARGEST SINGLE PERPENDICULAR DEVIATION FROM A STRAIGHT LINE AT 45 DEGREES
PATH LENGTH = 4 INCHES; SPEED = 6 ips; RESOLUTION = 1000 cpi
90
70
WHITE PAPER
50 MANILA
WHITE FORMICA
30 WHITE PINE
BLACK COPY
10
-10
0.77 0.87 0.97 1.07 1.17 1.27 1.37 1.47 1.57 1.67 1.77 1.87 1.97
DISTANCE FROM LENS REFERENCE PLANE
TO NAVIGATION SURFACE (mm)
F igure 10. Typical path deviation vs. Z distance (mm)
Relationship of mouse count to distance = m (mouse count)/n (cpi). E.g.: Deviation of 7 mouse count = 7/1000 = 0.007 inch, where
m = 7, n = 1000.
11
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| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet ADNS-3550.PDF ] | |
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