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ADNS-7050 Schematic ( PDF Datasheet ) - AVAGO

Teilenummer ADNS-7050
Beschreibung Laser Mouse Sensor
Hersteller AVAGO
Logo AVAGO Logo 




Gesamt 30 Seiten
ADNS-7050 Datasheet, Funktion
ADNS-7050
Laser Mouse Sensor
Data Sheet
Description
The Avago Technologies ADNS-7050 sensor along with
the ADNS-6120 or ADNS-6130-001 lens, ADNS-6130-001
clip and ADNV-6340 VCSEL form a complete and laser
mouse tracking system. It is the laser illuminated sys-
tem enabled for cordless application. Powered by Avago
Technologies LaserStreamTM technology, it can operate
on many surface that proved difficult for traditional LED-
based optical navigation. It’s low power architecture is
capable of sensing mouse motion while prolonging bat-
tery life, two performance areas essential in demanding
cordless applications.
There is no moving part, in the complete assembly for
ADNS-7050 laser mouse system, thus it is high reliability
and less maintenance for the end user. In addition, preci-
sion optical alignment is not required, facilitating high
volume assembly.
Theory of Operation
The ADNS-7050 is based on LaserStream™ Technology,
which measures changes in position by optically acquir-
ing sequential surface images (frames) and mathemati-
cally determining the direction and magnitude of move-
ment.
The ADNS-7050 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 dis-
tance of motion. The DSP calculates the ∆x and ∆y rela-
tive displacement values. An external microcontroller
reads the ∆x and ∆y information 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
x Low power architecture
x New LaserStream™ technology
x Self-adjusting power-saving modes for longest
battery life
x Speed motion detection up to 20 ips and 8g
x Enhanced SmartSpeed self-adjusting frame rate for
optimum performance
x Motion detect pin output
x Internal oscillator – no clock input needed
x Selectable 400 and 800 cpi resolution
x Wide operating voltage: 2.7 V-3.6 V nominal
x Four wire serial port
x Minimal number of passive components
x Laser fault detect circuitry on-chip for Eye Safety
Compliance
Applications
x Laser mice
x Optical trackballs
x Integrated input devices
x Battery-powered input devices






ADNS-7050 Datasheet, Funktion
OPTICAL NAVIGATION CENTER
0.89
(0.035)
0.2
(0.008)
18X (00.0.7350)RECOMMENDED
6X R(00.0.7350)MAX.
12.6
(0.496) 11.0
(0.433)
6.3
(0.248) 1.6
(0.063)
0
PIN 1 HOLE
1.78
(0.070)
DIMENSIONS IN MILLIMETERS (INCHES).
0
14.84
(0.584)
15.15
(0.596)
25.0
(0.984)
36.0
(1.417)
22.6
(0.890)
12.6
(0.496)
0
(0.000)
10.0
(0.394)
2 mm MAX. COMPONENT
HEIGHT CLEAR ZONE
2 mm MAX. COMPONENT
HEIGHT RECOMMENDED FINGER
CLEARANCE ZONE (BOTH SIDES)
Figure 5. Recommended PCB mechanical cutouts and spacing.
Assembly Recommendation
x Insert the sensor and all other electrical components
into the application PCB (main PCB board and VCSEL
PCB board).
x Wave-solder the entire assembly in a no-wash
solder process utilizing a solder fixture. The solder
fixture is needed to protect the sensor during the
solder process. It also sets the correct sensor-to -PCB
distance, as the lead shoulders do not normally rest
on the PCB surface. The fixture should be designed to
expose the sensor leads to solder while shielding the
optical aperture from direct solder contact.
x Place the lens onto the base plate.
x Remove the protective kapton tape from the optical
aperture of the sensor. Care must be taken to keep
contaminants from entering the aperture.
x Insert the PCB assembly over the lens onto the base
plate. The sensor aperture ring should self-align to the
lens. 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.
x Remove the protective cap from the VCSEL.
x Insert the VCSEL assembly into the lens.
x Slide the clip in place until it latches. This locks the
VCSEL and lens together.
x Tune the laser output power from the VCSEL to meet
the Eye Safe Class I Standard as detailed in the LASER
Power Adjustment Procedure.
x Install the mouse top case. There must be a feature
in the top case (or other area) to press down onto the
sensor to ensure the sensor and lens are interlocked
to the correct vertical height.
Design Considerations for Improving 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 Avago Technologies supplied IGES file and ADNS-
6130-001 trim lens (or ADNS-6120 round lens).
Typical Distance
Creepage
Clearance
Millimeters
12.0
2.1
Note that the lens material is polycarbonate and therefore,
cyanoacrylate based adhesives or other adhesives that may damage
the lens should NOT be used.
6

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ADNS-7050 pdf, datenblatt
AC Electrical Specifications
Electrical Characteristics over recommended operating conditions. Typical values at 25 °C, VDD=2.8V.
Parameter
Symbol
Motion Delay
suming
after Reset
tMOT-RST
Shutdown
tSTDWN
Wake from Shutdown tWAKEUP
Minimum
23
Typical
Forced Rest Enable tREST-EN
Wake from Forced Rest tREST-DIS
MISO Rise Time
tr-MISO
MISO Fall Time
tf-MISO
MISO Delay after SCLK tDLY-MISO
MISO Hold Time
MOSI Hold Time
thold-MISO 0.5
thold-MOSI 200
MOSI Setup Time
tsetup-MOSI 120
SPI Time between
Write Commands
tSWW
30
SPI Time between Write tSWR
and Read Commands
20
SPI Time between Read tSRW
and Subsequent tSRR
Commands
500
SPI Read Address-Data tSRAD
Delay
4
NCS Inactive after
Motion Burst
tBEXIT
500
NCS to SCLK Active
SCLK to NCS Inactive
(for Read Operation)
tNCS-SCLK 120
tSCLK-NCS 120
SCLK to NCS Inactive tSCLK-NCS 20
(for Write Operation)
NCS to MISO High-Z tNCS-MISO
MOTION Rise Time
MOTION Fall Time
Transient Supply
Current
tr-MOTION
tf-MOTION
IDDT
150
150
150
150
Maximum Units Notes
23 ms From SW_RESET register write to valid motion, as-
50
1
1
300
300
120
1/fSCLK
500
300
300
45
motion is present
ms From Shutdown mode active to low current
ms From Shutdown mode inactive to valid motion.
Notes: A RESET must be asserted after a shutdown.
Refer to section “Notes on Shutdown and Forced
Rest”, also note tMOT-RST
s From RESTEN bits set to low current
s From RESTEN bits cleared to valid motion
ns CL = 100 pF
ns CL = 100 pF
ns From SCLK falling edge to MISO data valid, no
load conditions
μs Data held until next falling SCLK edge
ns Amount of time data is valid after SCLK rising edge
ns From data valid to SCLK rising edge
μs From rising SCLK for last bit of the first data byte,
to rising SCLK for last bit of the second data byte.
μs From rising SCLK for last bit of the first data byte,
to rising SCLK for last bit of the second addressbyte.
ns From rising SCLK for last bit of the first data byte,
to falling SCLK for the first bit of the address byte
of the next command.
μs From rising SCLK for last bit of the address byte, to
falling SCLK for first bit of data being read.
ns Minimum NCS inactive time after motion burst
before next SPI usage
ns From NCS falling edge to first SCLK rising edge
ns From last SCLK rising edge to NCS rising edge, for
valid MISO data transfer
μs From last SCLK rising edge to NCS rising edge, for
valid MOSI data transfer
ns From NCS rising edge to MISO high-Z state
ns CL = 100 pF
ns CL = 100 pF
mA Max supply current during a VDD ramp from 0 to 2.8 V
12

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