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PDF NOA2301W Data sheet ( Hoja de datos )
| Número de pieza | NOA2301W | |
| Descripción | Digital Proximity Sensor | |
| Fabricantes | ON Semiconductor | |
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NOA2301W
Digital Proximity Sensor
with Interrupt
Description
The NOA2301W combines an advanced digital proximity sensor
and LED driver coupled with a tri−mode I2C interface with interrupt
capability in an integrated monolithic 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
NOA2301W enables a proximity sensor system with a 16:1
programmable LED drive current range and a 30 dB overall proximity
detection range.
The NOA2301W 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.
www.onsemi.com
AMBIENT LIGHT PROXIMITY SENSOR
Features
• Proximity Sensor and LED Driver in One Device
ORDERING INFORMATION
• Proximity Detection Distance Threshold I2C Programmable with
Device
Wafer Size
Temp Range
12−bit Resolution and Eight Integration Time Ranges (16−bit
effective resolution)
NOA2301W 200 mm wafer −40°C to 80°C
• 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
• Very Low Power Consumption
♦ Stand−by current 2.8 mA (monitoring I2C interface only, Vdd=3V)
♦ Proximity sensing average operational current 100 mA
♦ Average LED sink current 75 mA
• Programmable interrupt function including independent
• No External Components Required except the IR LED
and Power Supply Decoupling Caps
• These Devices are Pb−Free, Halogen Free/BFR Free
upper and lower threshold detection or threshold based
hysteresis
• Level or Edge Triggered Interrupts
• Proximity persistence feature reduces interrupts by
providing hysteresis to filter fast transients such as
camera flash
• Automatic power down after single measurement or
continuous measurements with programmable interval
time
• Wide Operating Voltage Range (2.3 V to 3.6 V)
• Wide Operating Temperature Range (−40°C to 80°C)
• I2C Serial Communication Port
and are RoHS Compliant
Applications
• Senses human presence in terms of distance for saving
display power and preventing inadvertent command
initiation in applications such as:
♦ Smart phones, mobile internet devices, MP3 players,
GPS
♦ Mobile device displays and backlit keypads
♦ Headphone use detection
♦ Cameras
♦ Game controllers, media players
• Contactless Switches
♦ Standard mode – 100 kHz
♦ Fast mode – 400 kHz
♦ High speed mode – 3.4 MHz
♦ Touch−less switches for light controls
♦ Money detection, coin or paper
♦ Sanitary switches for medical environments
© Semiconductor Components Industries, LLC, 2015
March, 2015 − Rev. 0
1
Publication Order Number:
NOA2301W/D
1 page  
NOA2301W
Table 4. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over 2.3 V < VDD < 3.6 V,
1.7 V < VDD_I2C < 1.9 V, −40°C < TA < 80°C, 10 pF < Cb < 100 pF) (See Note 4)
Parameter
Symbol
Min Typ Max Unit
Bus free time between STOP and START condition
Capacitive load for each bus line (including all parasitic
capacitance) (Note 6)
tBUF_std
tBUF_fast
tBUF_hs
Cb
4.7
1.3
0.160
10
− mS
−
−
100 pF
Noise margin at the low level (for each connected de-
vice − including hysteresis)
VnL 0.1 VDD
−V
Noise margin at the high level (for each connected de-
vice − including hysteresis)
VnH 0.2 VDD
−V
4. Refer to Figure 2 and Figure 3 for more information on AC characteristics.
5. The rise time and fall time are dependent on both the bus capacitance (Cb) and the bus pull−up resistor Rp. Max and min pull−up resistor
values are determined as follows: Rp(max) = tr (max)/(0.8473 x Cb) and Rp(min) = (Vdd_I2C – Vol(max))/Iol.
6. Cb = capacitance of one bus line, maximum value of which including all parasitic capacitances should be less than 100 pF. Bus capacitance
up to 400 pF is supported, but at relaxed timing.
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
Table 5. OPTICAL CHARACTERISTICS (Unless otherwise specified, these specifications are for VDD = 3.0 V, TA = 25°C)(Note 7)
Parameter
Symbol
Min Typ Max
Unit
Detection range, Tint = 4800 ms, ILED = 160 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), LED Modula-
tion Frequency = 308 kHz, Sample Delay = 250 ns, SNR = 7:1
DPS_4800_WHITE_
MOD
200
mm
Detection range, Tint = 4800 ms, ILED = 160 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_4800_WHITE_
160
148
mm
Detection range, Tint = 4800 ms, ILED = 25 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_4800_WHITE_
25
66
mm
Detection range, Tint = 2400 ms, ILED = 50 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_2400_WHITE_
25
80
mm
Detection range, Tint = 1800 ms, ILED = 75 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_1800_WHITE_
75
88
mm
Detection range, Tint = 1200 ms, ILED = 100 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_1200_WHITE_
100
90
mm
Detection range, Tint = 600 ms, ILED = 125 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_600_WHITE_
125
88
mm
Detection range, Tint = 600 ms, ILED = 100 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_600_WHITE_
100
76
mm
Detection range, Tint = 300 ms, ILED = 150 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_300_WHITE_
150
74
mm
Detection range, Tint = 300 ms, ILED = 100 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_300_WHITE_
100
62
mm
Detection range, Tint = 150 ms, ILED = 100 mA, 860 nm IR LED (OS-
RAM SFH4650), White Reflector (RGB = 220, 224, 223), SNR = 8:1
DPS_150_WHITE_
100
48
mm
Detection range, Tint = 1200 ms, ILED = 100 mA, 860 nm IR LED (OS-
RAM SFH4650), Grey Reflector (RGB = 162, 162, 160), SNR = 6:1
DPS_1200_GREY_
100
64
mm
Detection range, Tint = 2400 ms, ILED = 150 mA, 860 nm IR LED (OS-
RAM SFH4650), Black Reflector (RGB = 16, 16, 15), SNR = 6:1
DPS_2400_BLACK_
150
36
mm
Saturation power level
PDMAX
Measurement resolution, Tint = 150 ms
MR150
7. Measurements performed with default modulation frequency and sample delay unless noted.
0.8
11
mW/cm2
bits
www.onsemi.com
5
5 Page 
NOA2301W
PART_ID Register (0x00)
The PART_ID register provides part and revision identification. These values are hard−wired at the factory and cannot be
modified.
Table 8. PART_ID Register (0x00)
Bit 7 6 5 4 3 2 1 0
Field
Part number ID
Revision ID
Field
Part number ID
Revision ID
Bit Default
Description
7:4
0101
Part number identification
3:0 NA Silicon revision number
RESET Register (0x01)
Software reset is controlled by this register. Setting this
register followed by an I2C_STOP sequence will
immediately reset the NOA2301W to the default startup
standby state. Triggering the software reset has virtually the
same effect as cycling the power supply tripping the internal
Power on Reset (POR) circuitry.
Table 9. RESET Register (0x01)
Bit 7 6 5 4 3 2 1 0
Field
NA SW_reset
Field
NA
SW_reset
Bit Default
Description
7:1
XXXXXXX
Don’t care
0 0 Software reset to startup state
INT_CONFIG Register (0x02)
INT_CONFIG register controls the external interrupt pin function.
Table 10. INT_CONFIG Register (0x02)
Bit
76
5
Field
NA
4
3
2
edge_triggered
1
auto_clear
0
polarity
Field
NA
Edge_triggered
auto_clear
polarity
Bit Default
Description
7:3 XXXXX Don’t care
2 0 0 Interrupt pin stays asserted while the INTERRUPT register bit is set (level)
1 Interrupt pin pulses at the end of each measurement while the INTERRUPT
register bit is set
1 1 0 When an interrupt is triggered, the interrupt pin remains asserted until cleared
by an I2C read of INTERRUPT register
1 Interrupt pin state is updated after each measurement
0 0 0 Interrupt pin active low when asserted
1 Interrupt pin active high when asserted
www.onsemi.com
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| PDF Descargar | [ Datasheet NOA2301W.PDF ] | |
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