ADNS-3090 Datasheet PDF - Avago

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ADNS-3090
Avago

Part Number ADNS-3090
Description High-Performance Optical Mouse Sensor
Page 30 Pages


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ADNS-3090
High-Performance Optical Mouse Sensor
Data Sheet
Description
The ADNS-3090 is a high performance addition to Avago
Technologies’ popular ADNS family of optical mouse
sensors.
The ADNS-3090 is based on a new, faster architecture with
improved navigation. The sensor is capable of sensing high
speed mouse motion - up to 6 0 inches per second and
acceleration up to 2 0g – for increased user precision and
smoothness.
The ADNS-3090 along with the ADNS-2120-001 trim lens,
ADNS-2220-001 assembly clip and HLMP-ED80-XX000 form
a complete, compact optical mouse tracking system. There
are no moving parts, which means high reliability 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 20-pin staggered dual inline
package (DIP).
Theory of Operation
The ADNS-3090 is based on Optical Navigation Technol-
ogy, which measur es changes in position b y optically
acquiring sequential surface images (frames) and math-
ematically determining the dir ection and mag nitude of
movement.
It contains an I mage Acquisition System (IAS), a Dig ital
Signal Processor (DSP), and a four-wire serial port.
The IAS acquires microscopic surface images via the lens
and illumination sy stem. These images ar e pr ocessed
by the DSP t o determine the dir ection and distanc e of
motion. The DSP calculat es the Δx and Δy r elative dis-
placement values.
An external microcontroller reads the Δx and Δy informa-
tion from the sensor serial port. The microcontroller then
translates the data into PS2 or USB signals before sending
them to the host PC or game console.
Features
x High speed motion detection – up to 60 ips and 20g
x Enhanced architecture for greatly improved optical
navigation technology
x Programmable frame rate over 6400 frames per
second
x SmartSpeed self-adjusting frame rate for optimum
performance
x Serial port burst mode for fast data transfer
x 1800 cpi or 3500 cpi selectable resolution
x Single 3.3 volt power supply
x Four-wire serial port along with Chip Select, Power
Down, and Reset pins
Applications
x Mice for game consoles and computer games
x Mice for desktop PC’s, Workstations, and portable
PC’s
x T rackballs
x Integrated input devices
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Pinout
Pin Name
1 NCS
2 MISO
3 SCLK
4 MOSI
5 LED_CTRL
6 RESET
7 NPD
8 OSC_OUT
9 GUARD
10 OSC_IN
11 NC
12 OPTP
13 REFC
14 REFB
15 VDD3
16 GND
17 VDD3
18 NC
19 GND
20 NC
Description
Chip select
(active low input)
Serial data output
(Master In/Slave Out)
Serial clock input
Serial data input
(Master Out/Slave In)
LED control output
Reset input
Power down
(active low input)
Oscillator output
Oscillator GND for PCB guard
(optional)
Oscillator input
No connect
Connect to VDD3
Reference capacitor
Reference capacitor
Supply voltage
Ground
Supply voltage
No connect
Ground
No connect
20
1
19
2
18
3
17
4
16
5
15
6
14
7
13
8
12
9
11
10
Figure 1. Package outline drawing (top view)
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Figure 2. Package outline drawing
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to prevent
damage and/or degradation which may be induced by ESD.
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Overview of Optical Mouse Sensor Assembly
2D Assembly Drawing of ADNS-3090
Shown with ADNS-2120-001, ADNS-2220-001 and HLMP
ED80-XX000.
Avago Technologies pr ovides an IGES file dra wing de -
scribing the base plate molding features for lens and PCB
alignment.
The components int erlock as they ar e mount ed ont o
defined features on the base plate.
The ADNS-3090 sensor is desig ned f or mounting on a
through hole PCB , look ing down. There is an aper ture
stop and features on the package that align to the lens.
The ADNS-2120-001 trim lens pr ovides optics f or the
imaging of the sur face as w ell as illumination of the
surface at the optimum angle . F eatures on the lens
align it t o the sensor, base plat e, and clip with the LED .
The lens also has a lar ge round flange to provide a long
creepage path f or an y ESD ev ents that oc cur at the
opening of the base plate.
The ADNS-2220-001 clip holds the LED in r elation t o
the lens. The LED must be inserted into the clip and the
LED’s leads formed prior to loading on the PCB. The clip
interlocks the sensor to the lens, and through the lens to
the alignment features on the base plate.
The HLMP-ED80-XX000 LED is recommended for illumina-
tion. If used with the bin table, sufficient illumination can
be guaranteed.
Figure 3. Recommended PCB mechanical cutouts and spacing
4



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