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PDF ( 数据手册 , 数据表 ) NOA3315W

零件编号 NOA3315W
描述 Digital Proximity Sensor
制造商 ON Semiconductor
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NOA3315W 数据手册, 描述, 功能
NOA3315W
Digital Proximity Sensor
with Dual Ambient Light
Sensors and Interrupt
Description
The NOA3315W combines an advanced digital proximity sensor
and LED driver with dual ambient light sensors (ALS) and tri−mode
I2C interface with interrupt capability in an integrated monolithic
www.onsemi.com
device. Multiple power management features and very low active
sensing power consumption directly address the power requirements
of battery operated mobile phones and mobile internet devices.
The proximity sensor measures reflected light intensity with a high
degree of precision and excellent ambient light rejection. The
NOA3315W enables a proximity sensor system with a 16:1
programmable LED drive current range and a 30 dB overall proximity
detection range. The dual ambient light sensors include one with a
photopic light filter and one with no filter. Both have dark current
AMBIENT LIGHT PROXIMITY SENSOR
compensation and high sensitivity eliminating inaccurate light level
detection and insuring proper backlight control even in the presence of
dark cover glass.
ORDERING INFORMATION
The NOA3315W is ideal for improving the user experience by
enhancing the screen interface with the ability to measure distance for
near/far detection in real time and the ability to respond to ambient
Device
NOA3315W
Wafer Size
200 mm wafer
Temp Range
−40°C to 80°C
lighting conditions to control display backlight intensity.
Features
Ambient Light Sensing
Proximity Sensor, LED Driver and Dual ALS in One
Dual ALS senses ambient light and provides 16−bit
Device
output counts on the I2C bus directly proportional to the
Very Low Power Consumption
Stand−by current 2.8 mA (monitoring I2C interface
ambient light intensity
Photopic Spectral Response of ALS1 Nearly Matches
only, Vdd = 3 V)
Human Eye
ALS operational current 50 mA per sensor
Broadband response of ALS2 supports compensation
Proximity sensing average operational current
100 mA
Average LED sink current 75 mA
These Devices are Pb−Free, Halogen Free/BFR Free
and are RoHS Compliant
for spectral shifts encountered with different types of
cover glass
Dynamic Dark Current Compensation
Linear Response over the Full Operating Range
3 ranges – 100 counts/lux, 10 counts/lux, 1 count/lux
Proximity Sensing
Senses Intensity of Ambient Light from 0.02 lux to 52k
Proximity detection distance threshold I2C
programmable with 12−bit resolution and eight
lux with 21−bit Effective Resolution (16−bit converter)
Programmable Integration Times (50 ms, 100 ms,
integration time ranges (16−bit effective resolution)
200 ms, 400 ms)
Effective for Measuring Distances up to 200 mm and
Beyond
Excellent IR and Ambient Light Rejection including
Sunlight (up to 50K lux) and CFL Interference
Programmable LED Drive Current from 10 mA to
160 mA in 5 mA Steps, no External Resistor Required
User Programmable LED Pulse Frequency
Additional Features
Programmable interrupt function including independent
upper and lower threshold detection or threshold based
hysteresis for proximity and or ALS
Level or Edge Triggered Interrupts
Proximity persistence feature reduces interrupts by
providing hysteresis to filter fast transients such as
camera flash
© Semiconductor Components Industries, LLC, 2015
March, 2015 − Rev. 0
1
Publication Order Number:
NOA3315W/D







NOA3315W pdf, 数据表
NOA3315W
12K
10K
8K
6K
4K
2K
0
0
TYPICAL CHARACTERISTICS
ALS1 Meas
ALS2 Meas
100 200 300 400 500 600
EV (lux)
Figure 6. ALS1 Linearity 0−700 lux
700
1800
1600
1400
1200
1000
800
600
400
200
0
0
ALS1 Meas
ALS2 Meas
20 40 60 80
EV (lux)
Figure 7. ALS1 Linearity 0−100 lux
100
160
140
120
100
80
60
40
20
0
0
ALS1 Meas
ALS2 Meas
2 468
EV (lux)
Figure 8. ALS1 Linearity 0−10 lux
10
0
-20 -101.000
-30 0.900
-40 0.800
-50
-60
0.700
0.600
0.500
-70 0.400
0.300
-80 0.200
0.100
-90 0.000
10
20
30
40
50
60
70
80
90
-100 100
-110 110
-120
-130
-140
-150
-160
-170
180
ALS1
120
130
140
150
160
170
ALS2
Figure 10. ALS1 & ALS2 Horizontal Response
to White LED Light vs Angle (Source swept
from LED pin (+905) to VDD pin (−905))
25
ALS1 Meas
20
15
10
ALS2 Meas
5
0
0 0.5 1.0 1.5 2.0
EV (lux)
Figure 9. ALS1 Linearity 0−2 lux
0
-20 -10 1.000
-30 0.900
-40 0.800
-50
-60
0.700
0.600
0.500
-70 0.400
0.300
-80 0.200
0.100
-90 0.000
10
20
30
40
50
60
70
80
90
-100 100
-110
-120
-130
-140
-150
-160
-170
180
ALS1
110
120
130
140
150
160
170
ALS2
Figure 11. ALS1 & ALS2 Vertical Response to
White LED Light vs Angle (Source swept from
LED pin (+905) to INT pin (−905))
www.onsemi.com
8







NOA3315W equivalent, schematic
NOA3315W
Table 14. PS_TH_UP Registers (0x10 – 0x11)
Bit 7 6 5 4 3 2
Field
PS_TH_UP_MSB(0x10), PS_TH_UP_LSB(0x11)
1
0
Field
PS_TH_UP_MSB
PS_TH_UP_LSB
Bit Default
Description
7:0
0xFF
Upper threshold for proximity detection, MSB
7:0
0xFF
Upper threshold for proximity detection, LSB
Table 15. PS_TH_LO Registers (0x12 – 0x13)
Bit 7 6 5 4 3 2
Field
PS_TH_LO_MSB(0x12), PS_TH_LO_LSB(0x13)
1
0
Field
PS_TH_LO_MSB
PS_TH_LO_LSB
Bit Default
Description
7:0
0x00
Lower threshold for proximity detection, MSB
7:0
0x00
Lower threshold for proximity detection, LSB
PS_FILTER_CONFIG Register (0x14)
PS_FILTER_CONFIG register provides a hardware
mechanism to filter out single event occurrences or similar
anomalies from causing unwanted interrupts. Two 4 bit
registers (M and N) can be set with values such that M out
of N measurements must exceed threshold settings in order
to set an interrupt. The default setting of 1 out of 1 effectively
turns the filter off and any single measurement exceeding
thresholds can trigger an interrupt. N must be greater than or
equal to M. A setting of 0 for either M or N is not allowed
and disables the PS Interrupt.
Table 16. PS_FILTER_CONFIG Register (0x14)
Bit 7 6 5 4 3 2 1 0
Field
filter_N
filter_M
filter_N
filter_M
Field
Bit Default
7:4
0001
Filter N
3:0
0001
Filter M
Description
PS_CONFIG Register (0x15)
Proximity measurement sensitivity is controlled by
specifying the integration time. The integration time sets the
number of LED pulses during the modulated illumination.
The LED modulation frequency remains constant with a
period of 1.5 ms. Changing the integration time affects the
sensitivity of the detector and directly affects the power
consumed by the LED. The default is 1200 ms integration
period.
Hyst_enable and hyst_trigger work with the PS_TH
(threshold) settings to provide jitter control of the INT
function.
ALS_blanking disables the ALS during the time the IR
LED is on during a PS measurement. This will eliminate the
effect of the PS IR signal bouncing off cover glass and
affecting the ALS value.
www.onsemi.com
16










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