PAT9125EL [PIXART]
Optical Tracking Miniature Chip;
| 型号： | PAT9125EL |
| 厂家： | 
PIXART IMAGING INC. |
| 描述： | Optical Tracking Miniature Chip |
| 文件： | 总13页 (文件大小：782K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
PAT9125EL: Optical Tracking Miniature Chip
General Description
Key Parameters
The PAT9125EL is PixArt Imaging’s low power optical
tracking miniature chip using PixArt’s LASER-based optical
navigation technology enabling digital surface tracking. It
Parameter
Value
VDD : 2 connection types
type1 2.1 ~ 3.6V
type2 1.7 ~ 1.9V
integrates an optical chip with a LASER light source in a
single miniature package, providing wide depth of field
(DOF) range on glossy surfaces, and design flexibility into
highly space constraint devices. This tracking system also
does not require code wheel, code strip and any special
marking on tracking surface for motion control or tracking
purposes. It is recommended for use in hermetic or
enclosed mechanical system design and applications.
LASER power calibration process is NOT required in the
complete system; it was pre-calibrated at chip level which
helps to facilitate high volume assembly.
Supply Voltage
VLD : 2.7 ~ 3.6V
I2C or 3-wire SPI
Control Interface
Distance to tracking
surface (DOF)
1 ~ 30mm (on STS surface)
On flat STS
. 30 ips @ distance ≧ 3mm
. 10 ips @ distance 1~3mm
Max. tracking
speed
On 1.0mm diameter STS shaft
. 900 rpm @ distance ≧ 3mm
. 300 rpm @ distance 1~3mm
~1,275 cpi (on flat STS) or
~630 counts/rev (on 1.0mm
diameter STS shaft at 1.0mm
distance)
Key Features
. Miniature reflowable SMT package with built-in VCSEL
LASER light source in a single package
. Wide DOF range on glossy surfaces, e.g. stainless steel
(STS)
. No lens is needed
. Compliance to IEC/EN 60825-1 Eye Safety
Class 1 LASER power output level
On-chip LASER fault detection circuitry
. Support I2C or 3-wire SPI or interface
. Programmable resolution up to 1,275cpi (on flat STS)
. Motion detection interrupt output
Max Resolution
Run : 0.7mA
Operating current
(Average @ VDD =
VLD = 3.3V)
Sleep1/2 : 25µA / 10uA
Power down : 5µA
VCSEL LASER 850 nm
3.5 x 3.2 x 1.0 mm
Light Source
Package Size LWH
Ordering Information
. Efficient low power management with programmable
sleep modes & downshift time
. Internal oscillator – no external clock input needed
Part Number
PAT9125EL-TKIT
PAT9125EL-TKMT
Interface Package Type
I2C
LGA 8-pin
LGA 8-pin
SPI
Applications
. Suitable for space-constraint and battery-powered
wireless devices
. Devices that requires tracking on surfaces with wide DOF
working range
For any additional inquiries, please contact us at
http://www.pixart.com/contact.asp
. Devices that require tracking on small diameter of shaft
and suitable for wearable and portable devices
Version 1.2 | 31 May 2017 | 21002AEN
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Contents
Introduction................................................................................................................................................................. 3
Overview ................................................................................................................................................................. 3
1.1
1.2
1.3
1.4
Signal Description.................................................................................................................................................... 4
Potential Tracking Mechanisms............................................................................................................................... 5
Terminologies.......................................................................................................................................................... 6
Operating Specifications .............................................................................................................................................. 7
Absolute Maximum Ratings..................................................................................................................................... 7
2.1
2.2
2.3
Recommended Operating Conditions ..................................................................................................................... 7
DC Characteristics.................................................................................................................................................... 8
Mechanical Specifications............................................................................................................................................ 9
Mechanical Dimension ............................................................................................................................................ 9
3.1
4.1
Reference Schematics................................................................................................................................................ 10
Schematics for I2C Interface (PAT9125EL-TKIT) ..................................................................................................... 10
4.1.1 High Voltage Segment (VDD : 2.1V ~ 3.6V)...................................................................................................... 10
4.1.2 Low Voltage Segment (VDD : 1.7V ~ 1.9V)....................................................................................................... 10
4.2
Schematics for SPI Interface (PAT9125EL-TKMT) .................................................................................................. 11
4.2.1 High Voltage Segment (VDD : 2.1V ~ 3.6V)...................................................................................................... 11
4.2.2 Low Voltage Segment (VDD : 1.7V ~ 1.9V)....................................................................................................... 11
Registers List.............................................................................................................................................................. 12
Document Revision History.................................................................................................................................................... 13
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All rights reserved. Any portion in this paper shall not be reproduced, copied, or transformed to any other forms without permission.
PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Introduction
1.1 Overview
PAT9125EL is a high performance and an ultralow power CMOS-processed optical navigation chip with the integrated digital
image process algorithm/circuits and a VCSEL LASER as the light source. It is based on PixArt’s optical navigation technology
of LASER which measures changes in position by optically acquiring sequential surface images (frames) and mathematically
determining the speed, the direction and the magnitude of motion. The displacement X and Y information are available in
registers. A host controller can read and translate the displacement X and Y information from the SPI or I2C serial interface.
Note: Throughout this document PAT9125EL is referred to as the chip.
VLD
Light Source
(LASER power input)
LASER SINGLE FAULT
LASER DRIVER
DETECTION
Image Array
VDD
POWER SAVING
MANAGEMENT
(Chip power input)
VOLTAGE
REGULATOR
AND
VSS
POWER
CONTROL
MOTION
MOTION
DETECTION
VDDA
IMAGE PROCESSING
(1.8V regulator output)
NCS / ID_SEL
SCLK / SCL
SPI SLAVE
Or
I2C SLAVE
CONTROL REGISTERS
SDIO / SDA
Figure 1. Functional Block Diagram
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
1.2 Signal Description
+ Y
+ X
Figure 2. Pin Configuration
Table 1. Signal Pins Description
Signal Name
Pin No.
Type Description
PWR Anode of the VCSEL LASER, voltage range: 2.7V ~ 3.3V
SPI
VLD
I2C
VLD
1
2
VDD is the main power supply for IC circuits
VDDA
VDDA
PWR
High voltage Segment (VDD: 2.1V ~ 3.6V): VDDA is 1.8V regulator output and
should connect a 4.7uF capacitor to ground
Low Voltage Segment (VDD: 1.7V ~ 2.1V): VDDA should connect to VDD directly
3
VDD
VDD
PWR
4
5
VSS
VSS
SCL
GND Chip ground
SCLK : Clock input for SPI interface
SCLK
IN
SCL : Clock input for I2C interface
SDIO : Bi-directional I/O for SPI interface
SDA : Bi-directional I/O for I2C interface
OUT Motion detection output (active low)
6
7
SDIO
SDA
I/O
MOTION MOTION
NCS : Chip select for 3-wire SPI interface (active low)
8
9
NCS
ID_SEL
TEST
IN
ID_SEL : Slave ID (7-bit) Selection for I2C interface
High = 0x73, Low=0x75, NC = 0x79
This pin is located on the back of the chip and is for PixArt testing purpose.
Please do NOT connect it to any part of the PCB. Please refer to Figure 9.
TEST
NC
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
1.3 Potential Tracking Mechanisms
Figure 3. Tracking on a Moving Surface
Figure 4. Tracking on the Side of a Rotational Shaft
Figure 5. Tracking on the end of a Rotational Shaft
Figure 6. Tracking on a Disk Edge
Figure 7. Tracking on a Rotational Bezel
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
1.4 Terminologies
Term
ACK
CPI
Description
Acknowledge bit of I2C bus
Counts per Inch
DOF
FPS
I2C
Depth of Field
Frames per Second
Inter-Integrated Circuit
Inches per Second
IPS
LD
LASER Diode
LGA
LOP
NA
RPM
SPI
Land Grid Array
LASER output power, unit: uW (micro-watt)
Not-acknowledge bit of I2C bus
Revolutions per Minute
Serial Peripheral Interface
Stainless Steel
STS
VCSEL
Vertical-Cavity Surface-Emitting LASER
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Operating Specifications
2.1 Absolute Maximum Ratings
Table 2. Absolute Maximum Ratings
Parameters
Symbol
TSTG
VDC
VIN
TSOL
Min.
-40
-0.3
-0.3
-
Max.
85
3.9
VDC
260
Unit Notes
°C
V
Storage Temperature
Power Supply Voltage
Signal Input Voltage
Lead Solder Temp
V
For all input I/O
°C Non-condensing, Non-biased
All pins, Human Body Model MIL
883 Method 3015
ESD
VHBM
-
2
kV
Notes:
1. At room temperature.
2. Maximum Ratings are those values beyond which damage to the device may occur.
3. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional
operation under absolute maximum-rated conditions is not implied.
4. Functional operation should be restricted to the Recommended Operating Conditions.
2.2 Recommended Operating Conditions
Table 3. Recommended Operating Conditions
Description
Operating Temperature
Symbol Min.
Typ.
-
-
1.8
3.0
-
Max.
60
3.6
1.9
3.6
Unit Notes
°C
TA
-20
2.1
1.7
2.7
-
V
V
V
For chip operated in High Voltage Segment
For chip operated in Low Voltage Segment
For LASER Power
VDD
Power Supply Voltage
VLD
VNPP
Supply Noise
100
mV Peak to peak voltage within 10kHz – 80 MHz
Distance to Tracking
Surface (DOF)
Z
1
-
30
mm On STS surface (refer to Notes below)
Based on flat STS with distance ≧ 3mm
-
30
10
ips
ips Based on flat STS with distance 1~3mm
Based on 1.0mm diameter STS shaft with
distance ≧ 3mm
Tracking Speed
Notes:
VSP
900
300
rpm
Based on 1.0mm diameter STS shaft with
distance 1~3mm
rpm
1. PixArt does not guarantee the performance if the operating temperature is beyond the specified limit.
2. When the distance to tracking surface is < 3mm, the reported CPI resolution could be lower than the CPI value at ≧
3mm. Please refer to Figure 8 below.
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Figure 8. CPI vs Speed @Different Distance
2.3 DC Characteristics
Table 4. DC Electrical Specifications
Parameters
Symbol
Min.
Typ.
Max.
Unit Conditions
Tracking speed dependent
@VDD=VLD=3.3V on STS
Based on 32ms sampling period
@VDD=VLD=3.3V on STS
Based on 128ms sampling period
@VDD=VLD=3.3V on STS
Run mode current
IRUN
-
0.7
-
mA
µA
µA
Sleep 1 mode current
Sleep 2 mode current
ISLP1
ISLP2
-
-
25
10
-
Power Down current
Input Voltage High
Input Voltage Low
Output Voltage High
Output Voltage Low
IPD
VIH
VIL
VOH
VOL
-
5
-
-
-
-
10
-
VDD*0.3
µA @VDD=VLD=3.3V
VDD*0.7
V
V
-
For NCS, SCLK, SDIO, MOTION pins
VDD-0.4
-
-
V
V
0.4
Notes: All the parameters are tested under operating conditions: TA = 25°C
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Mechanical Specifications
3.1 Mechanical Dimension
Figure 9. Package Outline Diagram
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Reference Schematics
4.1 Schematics for I2C Interface (PAT9125EL-TKIT)
The chip supports standard I2C interface and the SCL clock speed is up to 1MHz. Three different Slave IDs can be selected
from the ID_SEL pin (High = 0x73, Low=0x75, NC = 0x79). Notice that 5KΩ of R1 and R2 (SCL/SDA bus pull-high resistors) is
just for reference and the resistance might have to be adjusted according to the overall I2C bus loading of user’s whole
system.
4.1.1 High Voltage Segment (VDD : 2.1V ~ 3.6V)
VDD
VLD
(2.1V ~ 3.6V)
(2.7V ~ 3.6V)
VDDIO
Slave ID = 0x75 (7-bit)
ID_SEL
VLD
10uF
10uF
0.1uF
INT
SDA
SCL
MOTION
VDD
VDDA
VDD
4.7uF
R1= 5K
PAT9125EL-TKIT
Host Controller
SDA
SCL
(TOP VIEW)
VDD
0.1uF
R2= 5K
VSS
Figure 10. Schematics for High Voltage Segment (I2C Interface)
4.1.2 Low Voltage Segment (VDD : 1.7V ~ 1.9V)
VDD
VLD
(1.7V ~ 1.9V)
(2.7V ~ 3.6V)
VDDIO
Slave ID = 0x75 (7-bit)
ID_SEL
VLD
10uF
10uF
0.1uF
INT
SDA
SCL
MOTION
VDD
5K
VDDA
VDD
PAT9125EL-TKIT
Host Controller
SDA
SCL
(TOP VIEW)
VDD
5K
0.1uF
VSS
Figure 11. Schematics for Low Voltage Segment (I2C Interface)
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
4.2 Schematics for SPI Interface (PAT9125EL-TKMT)
The chip only supports simplified 3-wire SPI slave mode, while some host controllers only support standard 4-wire SPI
master mode. In this case, users can connect the host controller to the chip using the method shown below to communicate
each other. Notice that 3.3KΩ for R1 is just for reference and the resistance might have to be modified according to different
I/O capability of different host controllers.
4.2.1 High Voltage Segment (VDD : 2.1V ~ 3.6V)
VDD
VLD
(2.1V ~ 3.6V)
(2.7V ~ 3.6V)
VDDIO
VLD
NCS
INT
NCS
10uF
10uF
0.1uF
VDDA
MOTION
4.7uF
PAT9125EL-TKMT
(TOP VIEW)
Host Controller
MISO
MOSI
SCLK
VDD
VSS
SDIO
R1=3.3KΩ
0.1uF
SCLK
Figure 12. Schematics for High Voltage Segment (SPI Interface)
4.2.2 Low Voltage Segment (VDD : 1.7V ~ 1.9V)
VLD
VDD
(2.7 ~ 3.6V) (1.7 ~ 1.9V)
VDDIO
VLD
NCS
INT
NCS
10uF
10uF
0.1uF
0.1uF
VDDA
MOTION
PAT9125EL-TKMT
(TOP VIEW)
Host Controller
MISO
MOSI
SCLK
VDD
VSS
SDIO
R1=3.3KΩ
SCLK
Figure 13. Schematics for Low Voltage Segment (SPI Interface)
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Registers List
Address Register Name
Access Reset Brief Description
0x00
0x01
0x02
Product_ID1
Product_ID2
Motion_Status
RO
RO
RO
0x31 Product Identifier [11:4]
Upper 4 bits for Product Identifier, PID [3:0]
Lower 4 bits for Product Version, VID [3:0]
0x91
-
Motion Status information
8-bit 2’s complement number for X-movement data in 8-bit
movement data format
X-movement = Delta_X_Lo[7:0]
8-bit 2’s complement number for Y-movement data in 8-bit
movement data format
0x03
0x04
Delta_X_Lo
Delta_Y_Lo
RO
RO
-
-
Y-movement = Delta_Y_Lo[7:0]
0x05
0x06
0x09
0x0A
0x0B
0x0D
0x0E
Operation_Mode
Configuration
Write_Protect
Sleep1
Sleep2
RES_X
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0xA0 Operation mode selection
0x17 Software power down and reset
0x00 Write Protect to avoid missed-writing registers
0x77 Sleep1 configuration
0x10 Sleep2 configuration
0x14 CPI resolution setting for X axis
0x14 CPI resolution setting for Y axis
High nibble of X-movement and Y-movement for 12-bit 2’s
RES_Y
complement data format.
X-movement = {Delta_XY_Hi[7:4], Delta_X_Lo[7:0]}
0x12
Delta_XY_Hi
RO
-
Y-movement = {Delta_XY_Hi[3:0], Delta_Y_Lo[7:0]}
0x14
0x17
0x19
Shutter
Frame_Avg
Orientation
RO
RO
R/W
-
-
Index of LASER shutter time
Average brightness of a frame
0x04 Chip orientation selection
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PAT9125EL Product Datasheet
Optical Tracking Miniature Chip
PixArt Imaging Inc.
Document Revision History
Revision Number Date
Description
1.1
05 Apr 2017
Based on DS v1.1
Based on DS v1.1
1. Widened the spec. of VDD from 2.1V~3.3V to 2.1V~3.6V
2. Widened the spec. of VLD from 2.7V~3.3V to 2.7V~3.6V
3. Added LASER Class 1 Product logo
1.2
31 May 2017
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