CM32181A3OP [ETC]
Low Power, High Sensitivity I2C Ambient Light Sensor;
| 型号： | CM32181A3OP |
| 厂家： | 
ETC |
| 描述： | Low Power, High Sensitivity I2C Ambient Light Sensor |
| 文件： | 总16页 (文件大小：1002K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Serial No. 201307190009
CM32181
Low Power, High Sensitivity
I2C Ambient Light Sensor
Rev: 1.1 Revised 11th-June-2013
Description
Features
CM32181 is an advanced ambient light sensor with
I2C protocol interface and designed by the CMOS
process. It is easily operated via a simple I2C
command. The active interruption feature within the
threshold windows setting offers the benefit of
eliminating loading of the controller monitor.
• Filtron™ technology adoption :
excellent responsivity : close to rhumeye
responses
• High sensitivity:
minimum detectable intesi/Bit
supports low transmce(das design
• O-Trim™ technoloy aption :
ALS output tolerae: ± 1
• Support vaoopowemodes.
• Excellent mpensation: -40 to 85ºC
• High dynadeten resolution
• Standard I2protocol interface
• Interuption fature (INT) support
ammablinterrupt function with upper and
resholds. Adjustable persistence to
lse triggers.
scent light flicker immunity
tware shutdown mode control
• Operation voltage from 2.5V to 3.6V
• Ambient light strength detection range over 100K
Lux
• Package: OPLGA (2.35 x 1.8 x 1.0 mm)
• Lead-free package (RoHS compliant)
CM32181 incorporates a photodiode, amplifiers and
analog circuits into a single chip. The best spectral
sensitivity is used to closely capture real human eye
responses. CM32181 has excellent temperature
compensation. Its robust refresh rate setting does not
need an external RC low pass filter. Software
shutdown mode is provided which reduces power
consumption to be less than 0.5μA. CM32181’s
operating voltage ranges from 2.5V to 3.6V and
consumes only 1uA. The maximum detective lig
strength is over 167K Lux.
Block Diagram
VDD
Applications
Temperature
Sensor
• Notebook, Tablet, TV
• Mobile Phone, Smart-phone, PDA
• Automotive
SCL
Low Pss Fil
Output
buffer
with
SDA
INT
Pin Definition
I2C interface
Oscillator
ADDR
GND
OPLGA
<Top View>
1
2
3
Ground
I2C Data
Interrupt
4
5
6
Address Select
I2C Clock
Power
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© Copyright 2013, Capella Microsystems, Inc.
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Ordering Information
PART NUMBER
PACKING
PACKAGE
PIN NO.
QUANTITY
LEAD FREE
REMARK
CM32181A3OP
Tape and Reel
2.35 x 1.8 x 1.0mm
6
2500
Compliant
Absolute Maximum Ratings
PARAMETER
Storage temperature
SYMBOL
MIN
-40
-40
0
MAX
+100
+85
4
UNIT
CONDITIO
TS
TA
°C
°C
V
Operating temperature
Supply voltage
VDD
Recommended Operating Conditions
PARAMETER
Operating temperature
Supply voltage
SYMBOL
TA
MIN
-40
2.5
10
MAX
+85
3.6
CONDITION
V
VDD
I2C operating frequency
f(I2CCLK)
400
kz
Pin Descriptions
PIN ASSIGNMENT
SYMBOL
TYPE
FUNCTION
1
2
3
GND
SDAT
INT
I
ower suply ground. All voltages are referenced to GND
gital serial data output to the host
Interrupt pin. (Active low).
I/O (Open)
O Drai
Address Select. Pull high to select address 0x48 or low to select
address 0x10
4
ADD
5
6
S
I
I
I2C digital serial clock input from the host
Supply voltage
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Electrical & Optical Specifications
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
CONDITION
Peak sensitivity wavelength
λP
VIH
VIL
VOL
550
nm
Logic High
1.2
—
0
VDD
0.4
0.4
I2C signal input
V
V
Note
Logic Low
Output Low Voltage
SDA
3mA rrent
e 1,2
”)
Minimum
Maximum
0.005
Detectable intensity
LUX
2
(ALS_= “10”)
167000
Note 1,2
LS_SM = “01”)
Dark offset
3
3.3
1
SE
Supply operation voltage
VDD
2.5
3.6
Note 1,2,3
(PSM=11,refresh time:4500ms)
Note 1,2,3
(PSM=00,refresh time:600ms)
6
Supply current
IDD
μA
Note 1,2
(PSM_EN=0,refresh
time:100ms)
Shutdown current
Note:
IDD (SD)
0.
uA
Light Condition = Dark, Note 1
1.
2.
3.
Test condition: VDD = 3.3V, Tempre:
Light source: White LED.
Power saving mode enable
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© Copyright 2013, Capella Microsystems, Inc.
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
I2C Timing Characteristics
STANDARD
MODE
FAST
MODE
UNIT
PARAMETER
SYMBOL
MIN
MAX
MIN
10
MAX
Clock frequency
f(SMBCLK)
t(BUF)
10
4.7
4.0
4.7
4.0
300
250
4.7
4.0
25
100
400
kHz
us
us
u
ns
ns
us
us
ms
ns
ns
Bus free time between start and stop conditions
1.3
0.6
0.6
0.6
90
Hold time after (repeated) start condition.
After this period, the first clock is generated
t(HDSTA)
t(SUSTA)
t(SUSTO)
t(HDDAT)
t(SUDAT)
t(LOW)
Repeated start condition setup time
Stop condition setup time
Data hold time
Data setup time
10
.3
I2C clock (SCK) low period
I2C clock (SCK) high period
Detect clock/data low timeout
Clock/Data fall time
t(HIGH)
t(TIMEOUT)
t(F)
3
---
300
300
300
Clock/Data rise time
t(R)
1000
(LOW)
t
(R)
t
(F)
t
I2C
CLOCK
(SCLK)
VIH
VIL
(SUSTA)
t
(HDSTA)
t
(SUSTO)
t
(BUF)
t
(HDDAT)
(SUDAT)
t
t
I2C
DATA
(SDAT)
VIH
VIL
{
{
{
{
P
S
S
P
Stop Condition
Star C
Stop
t(LOSEXT)
SCLKACK
SDAACK
t(LOWMEXT)
t(LOWMEXT)
t(LOWMEXT)
CK
CLK)
I2C
DATA
(SDAT)
Figure 1. I2C Timing Diagram
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Parameter Timing Information
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
SA0
SA1
SA7
SA1
SA7
SA6
SA5
SA4
SA3
SA2
SA6
SA5
SA4
SA3
SA2
W
Start by
Master
ACK
ACK
I2CBus Slave Address Byte
Command Code
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
SA7
SA0
SA7
SA0
SA6
SA5
SA4
SA3
SA2
SA1
SA6
SA5
SA1
(SDAT)
Stop by
Master
ACK
ACK
Data Byte Low
DaBte High
Figure 2-1. I2C Bus Timing fonommand Format
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
SA0
SA1
SA7
SA7
SA6
SA5
SA4
SA3
SA2
SA6
SA5
SA4
SA
Start by
Master
ACK
C
ACK by
I2CBus res
Command Code
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
SA0
SA1
SA7
SA7
SA5
SA4
SA3
SA2
SA1
SA6
SA5
SA4
SA3
SA2
R
ACK b
ACK by
Master
I2CBus Slave Address Byte
Data Byte Low
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
SA7
SA0
SA6
SA5
SA4
SA3
SA2
SA1
(SDAT)
ACK by
Master
Stop by
Master
Data Byte High
Figure 2-2. I2C Bus Timing for Receiving Word Command Format
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Typical Performance Characteristics
Figure 3. Normalized Spectral Response
ew Angle
Fis. Temperature Characteristics
Figure 6. ALS_IT vs, Max Detection Range
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Application Information
Pin Connection with the Host
CM32181 is a cost effective solution for an ambient light sensor with I2C interface. The standard serial digital
interface easily accesses “light intensity” without using complex calculations and programming by an external
controller.
The additional capacitor near the VDD pin in the circuit is used for power supply noise rejection. value is
recommended at 0.1uF. The pull-high resistors for the I2C bus design are recommended to e 2.. Pin
ADDR is for address Select. Pull high to select address 0x48 or low to select address 0x10
An example of the circuit diagram is shown in Figure 7.
FigHaPin Connection Diagram
Digital Interface
CM32181 contains ster written via the I2C bus. All operations can be controlled by the command
register. The simltructure allows the user to easily program the operation setting and latch the
light data fC32181’s I2C command format description for Read and Write operations between
CM32181 e shown in Figure 8. The white areas indicate the host activity and the gray areas
indicate CM321acowledgement of the host access activity.
Write Protocol -> Write Command to CM32181
Read Protocol -> Read data from CM32181
S = Start Condition
P = Stop Condition
A = Acknowledge
Figure 8. CM32181 Command Protocol
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© Copyright 2013, Capella Microsystems, Inc.
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Command Register Format
There are 6 command codes provided by CM32181. Formats of these command code and registers’ definition
explanations are shown in below Table 1.
Command code
00
Register Name
Reserved
Bit
15:13 Set 000b
Sensitivity mode selection
Function/Description
R/W
W
00 = ALS Sensitivity x 1
12:11 01 = ALS Sensitivity x 2
10 = ALS Sensitivity x (1/8)
11 = ALS Sensitivity x (1/4)
ALS_SM
W
W
Reserved
10
Set 0b
ALS integration time
1100 = 25ms
1000 = 50ms
ALS_IT
9:6 0000 = 100m
0001 =
W
001
0011 =
Persistence protect number setting
5:4 = 2
10 = 4
ALS_PERS
W
11 = 8
3:2 Set 00b
W
W
ALS Interrupt enable setting
AT_EN
1
0
0 = ALS INT Disable
1 = ALS INT Enable
ALS shut down setting
0 = ALS Power On
1 = ALS Shut down
ALS_SD
W
01
02
03
ALS_WH
ALS_WH
ALS_WL
ALS_WL
Reserved
15:8 ALS High Threshold Window setting(MSB)
7:0 ALS High Threshold Window setting(LSB)
15:8 ALS Low Threshold Window setting(MSB)
7:0 ALS Low Threshold Window setting(LSB)
15:3 Set 0000 0000 0000 0b
W
W
W
W
W
Power Saving Mode
PSM
2:1 00 = Mode1
W
01 = Mode2
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© Copyright 2013, Capella Microsystems, Inc.
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
10 = Mode3
11 = Mode4
Please refer to Table 2
Power Saving Mode enable setting
0 = Disable
PSM_EN
0
W
1 = Enable
04
ALS
15:8 MSB 8bits data of whole ALS 16bits
7:0 LSB 8bits data of whole ALS 16bits
15:0
R
R
R
R
ALS
05
06
Reserved
ALS_IF_L
ALS_IF_H
Reserved
15
14
ALS crossing Low threshold INgger ev
ALS crossing High threshold T trigr event
07
13:0
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Command code 00(HEX)
Command code 01(HEX)
1. Bit 12:11 defines ALS sensitivity mode.
Once enable INT function and use High/Low
windows threshold, Bit 15:0 provides 16 bit
register for High bound threshold window
setting.
ꢀBit 12
00
Function
ALS Sensitivity x 1
ALS Sensitivity x 2
ALS Sensitivity x (1/8)
ALS Sensitivity x (1/4)
01
10
11
Bit
15:8 High Threshold Window setMSB)
7:0 High Threshold Window sttingB)
Function
2. Bit 9:6 defines ALS integration time setting
which represents how long ALS can update
the readout value.
Command code 02(HX)
Bit 9:6
1100
1000
0000
0001
0010
0011
Function
25ms
50ms
100ms
200ms
400ms
800ms
Once enable INT uncand use High/Low
windows threshBit 1provides 16 bit
register fbthshold window
setting.
Bit
1:Low hreshold Window setting(MSB)
Low Threshold Window setting(LSB)
Function
3. Bit 5:4 defines ALS interrupt persistence
setting. The interrupt pin is triggered while
sensor reading is out of threshold windows
after consecutive number of measurement
cycle.
d code 03(HEX)
1. Bit 2:1 defines Power Saving mode which
provides various power consumption,
sensitivity, and refresh time combinations.
Please refer to Table2.
Bit 5:4
00
Measurement cycle
1
2
4
01
10
11
Bit 2:1
00
01
10
11
Function
Mode1
Mode2
Mode3
Mode4
4. Bit 1 defines whetnablterrupt
function or not.
Bit 1
0
1
ction
T Disable
INT Enable
2. Bit 0 defines whether to enable power saving
mode or not.
Bit 0
0
1
Function
Disable
Enable
5. how to power on and shut down
sng.
Bit 0
1
Function
Power on
Shutdown
Command code 04(HEX)
To access 16-bit high resolution ALS output
data, it’s suitable to follow read protocol to
read from Command code 04 16 bits register.
Bit
15:8
7:0
Function
MSB 8bits data of whole 16bits
LSB 8bits data of whole 16bits
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Command code 06(HEX)
1. Bit 15 defines interrupt flag while trigger
occurred due to data crossing low threshold
windows.
ꢀBit 15
Function
0
1
Interrupt not triggered
Interrupt occurred
2. Bit 14 defines interrupt flag while trigger
occurred due to data crossing high threshold
windows.
ꢀBit 14
Function
0
1
Interrupt not triggered
Interrupt occurred
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Refresh Time Determination of PSM
CM32181’s refresh time can be determined by PSM and ALS_IT setting in Power Saving Mode(PSM).
Cooperating with the command register setting, the designer has a flexible method in defining the timing, power
consumption and sensitivity for light data collection.
ALS_SM
01
PSM
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
ALS_IT
0000
0000
0000
0000
0001
0001
0001
0001
0010
0010
0010
0010
0011
0011
0011
001
Refresh time(ms)
600
Idd(uA)
6
sensitivity(Lux/bit)
0.042
0.042
0.
0.
0.021
0.021
0.021
0.01
01
1100
2100
4100
700
3.5
2
01
01
1
01
10
6
01
1200
2200
4200
900
01
5
01
01
5
10
6
01
1400
2400
0
1300
1800
0
4800
0.01
01
0.01
01
3.5
21
15
10
6
0.01
01
0.005
0.005
0.005
0.005
01
01
01
Tablefresh e, Idd and sensitivity Relation Table
Auto-Memorizatin
CM32181 emhe last ambient light data before shutdown and keep this data before waking up.
When CM3218in utdown mode, the host can freely read this data via Read command directly. When
CM32akes uhe data will be refreshed by the new detection.
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Package Information (OPLGA)
TOP VIEW
SIDE VIEW
BOTTOM VIEW
2.35 ± 0.1
2.35 ± 0.1
1.35± 0.1
Pin 1 Marking
1
6
0.05±0.05
Package center & PD center
0.04± 0.04
0.04±0.04
3
4
0.45 ±
0.56
1.0 ± 0.1
C32181 Pin-out assignment
VDD
6
5
4
1
2
3
GND
SDAT
INT
SCLK
ADDR
Unit: mm
Figure 10. 21Package Dimensions
Packag
2.35
Pad r
0.1 mm
0.4mm
mm
0.1 mm
0.45mm
1.0mm
Figure 11. CM32181 OPLGA PCB Layout Footprint
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Recommended Storage and Rebaking Conditions
PARAMETER
Storage temperature
Relative humidity
Open time
MIN
MAX
UNITS
CONDITION
5
50
°C
%
60
168
hrs
Total time
6 months from the date code on the aluminized envelope (unopened)
1. Tape and Reel: 60 ºC , 22 hours
2. Tube: 60 ºC , 22 hours
Rebaking
Recommended Infrared Reflow
Soldering conditions are based on J-STD-020 C definition.
1. IR reflow profile conditions
PARAMETER
Peak temperature
TEMPERATURE
CONDITION
255+0/-5 ºC (Max: 260 ºC)
150 ~ 200 ºC
1onds
Preheat temperature range and timing
Timing within 5 ºC to peak temperature
Timing maintained above temperature / time
Timing from 25 ºC to peak temperature
Ramp-up rate
60 ~ 10 seconds
10 ~ 30 econds
0 ~ 150 seconds
8 minutes (Max)
217 ºC
3 ºC conds (M
6 ºC / ss (Max)
Ramp-down rate
2. Recommended normal soldeow 255 ℃.
Max. Temperature
260+0/-50C / 10 seconds
255
Ramp-up Rate
Ramp-down Rate
3 0C / seconds
(max)
6 0C / seconds
(max)
217
0
Soldering Zone
60-150 seconds
amp-up Rate
/ seconds
(max)
Pre-Heating Time
t2 - t1 = 60 - 180 secons
Time (second)
t2
t1
Figure 12. CM32181 Solder Reflow Profile Chart
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Recommended Iron Tip Soldering Condition and Warning Handling
1
Solder the device with the following conditions:
1.1 Soldering temperature: 400 ℃ (Max.)
1.2 Soldering time: 3 seconds (Max.)
2
If the temperature of the method portion rises in addition to the residual stress between the leads, the
possibility that open or short circuit occurs due to the deformation or destruction othe resin
increases.
3
4
The following methods: VPS, and wave soldering are not suggested for the component assey.
Cleaning method condition:
4.1 Solvent: Methyl Alcohol, Ethyl Alcohol, and Isopropyl Alcohol.
4.2 Solvent temperature < 45 ℃ (Max.);
4.3 Time: 3 minutes (Min.)
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Serial No. 201307190009
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Packing Information
DIMENSION OF CARRIER TAPE
PIN 1
SIDE VIEW
TOP VIEW
4.00 ± 0.10
4.00 ± 0.10
2.00 ± 0.10
Ф 1.50 ± 0.10
UNIT: mm
R 9 Max
R 9 Max
2.03 ± 0.10
2.58 ± 0.10
Figure 14. Taping Direction
Figure 13. CM32181 A3OP Package Carrier Tape
Figure 15. Reel Dimension
CAPELLA MICROSYSTEMS, INC
Taiwan office
USA office
2361 Calle Del Mundo, Santa Clara, CA95054
TEL: 408-727-8500
6F, No.43, Fusing Road, Sindian City, Taipei County 231, Taiwan
TEL: +886-2-82186600
FAX: +886-2-82186602
FAX: 408-969-0894
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Serial No. 201307190009
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