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PDF ALS-PDIC17-79NB-TR8 Data sheet ( Hoja de datos )
| Número de pieza | ALS-PDIC17-79NB-TR8 | |
| Descripción | Digital Ambient Light Sensor | |
| Fabricantes | Everlight Electronics | |
| Logotipo |  |
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SMD I2C Digital Ambient Light Sensor
ALS-PDIC17-79NB/TR8
Features
• Close to the human eye's response
• 15 bit effective resolution
• 50Hz/60Hz rejection
• Low sensitivity variation across various light sources
• Operating temperature performance, -40oC to 85oC
• Wide supply voltage range, 2.7V to 5.5V
• Low power consumption, less than 2mW while operating
• Shut-down mode, current consumption less than 0.1uA
• I2C serial port communication: (1) Standard 100kHz, (2).Fast 400kHz
• High dynamic sensing range and from 0 to 88,400 Lux
• Size: 2.0mm(L)*2.0mm(W)*0.6mm(H)
• RoHS compliant and Pb Free
Description
The ALS-PDIC17-79NB/TR8 is a digital-output light sensor with a two-wire, I2C serial interface that is compatible with
SMBus when working at 100kHz serial clock frequency. It combines a photodiode and an analog-to-digital converter
(ADC) on a single CMOS integrated circuit to provide light measurements over an effective 15-bit dynamic range. Two
operation modes are provided with one for constantly refreshing ADC and the other for one time integration. When
working in “one time integration” mode, no external resister is required. The integrating conversion technique used by
ALS-PDIC17-79NB/TR8 effectively eliminates the effect of flicker from AC-powered lamps, increasing the stability of
the measurement. ALS-PDIC17-79NB/TR8 wavelength is close to human-eye, and low response to non-visible light,
such as infrared and ultra-violet light.
Applications
• Detection of ambient light for controlling the backlighting of TFT LCD display
• Automatic residential and commercial lighting management
• Automatic contrast enhancement for electronic signboard
• Ambient light monitoring device for daylight and artificial light
Revi1sion Copy:rig3ht © 2010, Everlight All Rights Reserved. Release Date : 3.5.2012. Issue No: DRLSe-l0e0a00s0e34Date:2012-03-1w6w1w2.:e0v0e:r3li3g.h0t.com
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DATASHEET
SMD I2C Digital Ambient Light Sensor
ALS-PDIC17-79NB/TR8
AC Characteristics of I2C Signals in Standard and Fast Mode
Parameter
Symbol
I2C clock frequency
Hold time (repeated) START
condition. After this period, the first
clock pulse is generated.
Low period of I2C clock
High period of I2C clock
Set-up time for a repeated START
condition
Data hold time for I2C-bus devices
Data set-up time
Rise time of both I2C data and
clock signal’s
Fall time of both I2C data and clock
signal’s
Set-up time for STOP condition
Bus free time between STOP and
START condition
Capacitive load for each bus line
fSCL
tHD;STA
tLOW
tHIGH
tSU;STA
tHD;DAT
tSU;DAT
tr
tf
tSU;STO
tBUF
Cb
Standard Mode
Min. Max.
0 100
4.0
4.7
4.0
4.7
0 3.45
250 -
- 1000
- 300
4.0 -
4.7 -
- 400
Fast Mode
Min. Max
0 400
0.6 -
1.3
0.6
0.6
0 0.9
100 -
5 300
0.1 300
0.6 -
1.3 -
- 400
Unit
KHz
us
us
us
us
us
ns
ns
ns
us
us
pF
Figure 2 I2C Timing Diagram
Revi5sion Copy:rig3ht © 2010, Everlight All Rights Reserved. Release Date : 3.5.2012. Issue No: DRLSe-l0e0a00s0e34Date:2012-03-1w6w1w2.:e0v0e:r3li3g.h0t.com
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DATASHEET
SMD I2C Digital Ambient Light Sensor
ALS-PDIC17-79NB/TR8
Device Command
There are eight command codes are provided for I2C master to control the ambient light sensor. The specific
function corresponding to each command code is elaborate in Table 3.
Command
Code
1xxx_xxxx
(binary code)
0x0C
0x04
0x08
0x30
Function
Shut-down mode, this is the default state after applying VDD power to the
device. During shut-down mode, users can do the communication test.
Except the MSB must be logic 1, the value written to the command
register will not change any function and can be read back via the I2C bus
by issuing Receive Byte Protocol.
Activate the ambient light sensor and put the device in [continuous
operation mode], The ADC register will be refreshed every Tint
integration time which is set by an external resistor Rext. See Table 4 for
details.
Activate the ambient light sensor and put the device in [one time
integration mode]. The integration time is controlled by I2C commands,
start and stop integration.
Start integration: This command will reset the ADC register to 0x0000
and begin a new integration in [one time integration mode]. This is an
invalid command in [continuous operation mode].
Stop integration: This command will stop the integration in [one time
integration mode] and set the valid bit ( D[15] ) high. This is an invalid
command in [continuous operation mode].
Table 3 Command Code List
Revi1si1on Copy:rig3ht © 2010, Everlight All Rights Reserved. Release Date : 3.5.2012. Issue No: DRLSe-l0e0a00s0e34Date:2012-03-1w6w1w2.:e0v0e:r3li3g.h0t.com
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| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet ALS-PDIC17-79NB-TR8.PDF ] | |
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