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Teilenummer | ADNS-3530 |
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Beschreibung | Low Power LED Integrated Slim Mouse Sensor | |
Hersteller | PixArt | |
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Gesamt 25 Seiten Data Sheet
ADNS-3530
Low Power LED Integrated Slim Mouse Sensor
Description
Features
The ADNS-3530 LED optical mouse sensor is a small form
factor (SFF) LED illuminated navigation system.
The ADNS-3530 is a low-power optical navigation sen-
sor. It has a new, low-power architecture and automatic
power management modes, making it ideal for battery-
and power-sensitive applications such as cordless input
devices.
The ADNS-3530 is capable of high-speed motion
detection — up to 20 ips and 8 g. In addition, it has
an on-chip oscillator and integrated LED to minimize
external components.
The ADNS-3530, along with the ADNS-3150-001 lens,
forms 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-3530 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.
• 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 8 g
• 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: 2.7V - 3.6V 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
The ADNS-3530 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 Δx and Δy relative
displacement values.
An external microcontroller reads the Δx and Δy infor-
mation from the sensor serial port. The microcontroller
then translates the data into PS2, USB, or RF signals
0before sending them to the host PC or game console.
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
PixArt Imaging Inc.
E-mail: [email protected]
1
PixArt Imaging Inc.
Low Power LED Integrated Slim Mouse Sensor
PCB Assembly Considerations
1. Surface mount the sensor and all other electrical com-
ponents into PCB.
2. Reflow the entire assembly in a no-wash solder
process.
3. Place the lens onto the base plate. Care must be taken
to avoid contaminating or staining the lens.
4. Remove the protective kapton tape from optical ap-
erture of the sensor and LED. Care must be taken to
keep contaminants from entering the aperture. Rec-
ommend not to place the PCB facing up during the
entire mouse assembly process. Recommend to hold
the PCB first vertically for the kapton removal process.
5. Insert PCB assembly over the lens onto the base plate
aligning post to retain PCB assembly. The lens piece
has alignment posts which will mate with the align-
ment holes on the sensor aperture.
6. The optical position reference for the PCB is set by the
base plate and lens. Note that the PCB motion due to
button presses must be minimized to maintain optical
alignment.
7. Install mouse top case. There MUST be a feature in the
top case to press down onto the sensor to ensure the
sensor and lens components are interlocked to the
correct vertical height.
Design Considerations for Improved ESD Performance
For improved electrostatic discharge performance, typi-
cal creepage and clearance distance are shown in the
table below. Assumption: base plate construction as per
the PixArt Imaging supplied IGES file and ADNS-
3150-001 lens.
Typical Distance
Creepage
Clearance
Millimeters
0.6
2.76
Note that the lens material is polycarbonate and there-
fore, cyanoacrylate-based adhesives or other adhesives
that may damage the lens should NOT be used.
BOTTOM OF PCB TO
BOTTOM MATING
SURFACE OF LENS
2.28
(0.09)
CUSTOMER'S PCB
SENSOR
CUSTOMER'S
BASE PLATE
BOTTOM OF PCB TO
NAVIGATION SURFACE
3.25
(0.13)
0.29
(0.01)
BOTTOM OF LENS
TO NAVIGATION SURFACE
Figure 6a. Sectional view of PCB assembly
LENS
NAVIGATION
SURFACE
2.50 DIE TO NAVIGATION
(0.10) SURFACE
0.97
(0.04)
BOTTOM MATING SURFACE
OF LENS TO NAVIGATION SURFACE
CUSTOMER'S PCB
CUSTOMER'S BASE PLATE
LED DIE
SENSOR DIE
SENSOR PCB
LENS
Figure 6b. Sectional view of PCB assembly highlighting optical mouse components
NAVIGATION
SURFACE
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
6
PixArt Imaging Inc.
E-mail: [email protected]
6 Page PixArt Imaging Inc.
Low Power LED Integrated Slim Mouse Sensor
NCS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
SCLK
MOSI 1 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
MISO
Figure 11. Write operation
MOSI DRIVEN BY MICRO-CONTROLLER
12
1 A6
SCLK
MOSI
thold, MOSI
tsetup, MOSI
Figure 12. MOSI setup and hold time
Read Operation
A read operation, defined as data going from the ADNS-
3530 to the microcontroller, is always initiated by the
microcontroller and consists of two bytes. The first byte
contains the address, is sent by the microcontroller over
MOSI, and has a “0” as its MSB to indicate data direction.
The second byte contains the data and is driven by the
ADNS-3530 over MISO. The sensor outputs MISO bits on
falling edges of SCLK and samples MOSI bits on every
rising edge of SCLK.
NCS
SCLK
CYCLE #
SCLK
MOSI
MISO
1 23 4567
8
1 A6 A5 A4 A3 A2 A1 A0
Figure 13. Read operation
tSRAD DELAY
9 10 11 12 13 14 15 16
D7 D6 D5 D4 D3 D2 D1 D0
SCLK
tDLY-MISO
MISO
tHOLD-MISO
D0
Figure 14. MISO delay and hold time
All rights strictly reserved any portion in this paper shall not be reproduced, copied or transformed to any other forms without permission.
12 PixArt Imaging Inc.
E-mail: [email protected]
12 Page | ||
Seiten | Gesamt 25 Seiten | |
PDF Download | [ ADNS-3530 Schematic.PDF ] |
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