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PDF NOA3302 Data sheet ( Hoja de datos )
| Número de pieza | NOA3302 | |
| Descripción | Digital Proximity Sensor | |
| Fabricantes | ON Semiconductor | |
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NOA3302
Digital Proximity Sensor
with Ambient Light Sensor
and Interrupt
Description
The NOA3302 combines an advanced digital proximity sensor and
LED driver with an ambient light sensor (ALS) and tri−mode I2C
http://onsemi.com
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
1
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
CWDFN8
CU SUFFIX
CASE 505AJ
NOA3302 enables a proximity sensor system with a 32:1
programmable LED drive current range and a 30 dB overall proximity
PIN CONNECTIONS
detection threshold range. The photopic light response, dark current
compensation and high sensitivity of the ambient light sensor
VDD 1
8 SCL
eliminates inaccurate light level detection, insuring proper backlight
control even in the presence of dark cover glass.
VSS 2
7 SDA
The NOA3302 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
LED_GND 3
LED 4
6 NC
5 INT
lighting conditions to control display backlight intensity.
(Top View)
Features
• Proximity Sensor, LED driver and ALS in One Device
ORDERING INFORMATION
• Very Low Power Consumption
♦ Stand−by Current 5 mA (monitoring I2C interface only,
VDD = 3 V)
♦ ALS Operational Current 50 mA
♦ Proximity Sensing Average Operational Current 100 mA
♦ Average LED Sink Current 75 mA
Proximity Sensing
Device
Package
Shipping†
NOA3302CUTAG* CWDFN8
(Pb−Free)
2500 /
Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
*Temperature Range: −40°C to 80°C.
• Proximity Detection Distance Threshold I2C Programmable with
12−bit Resolution and Four integration Time Ranges
(15−bit effective resolution)
• Effective for Measuring Distances up to 100 mm and
• Photopic Spectral Response Nearly Matches Human Eye
Beyond
• Dynamic Dark Current Compensation
• Excellent IR and Ambient Light Rejection Including
Sunlight (up to 50k lux) and CFL Interference
• Programmable LED Drive Current from 5 mA to
160 mA in 5 mA steps, No External Resistor Required
• Linear Response Over the Full Operating Range
• Senses Intensity of Ambient Light from 0.05 lux to 52k
lux with 21−bit Effective Resolution (16−bit converter)
• Continuously Programmable Integration Times
Ambient Light Sensing
• ALS Senses Ambient Light and Provides a 16−bit
Output Count on the I2C Bus Directly Proportional to
(6.25 ms, 12.5 ms, 25 ms… to 800 ms)
• Precision on−Chip Oscillator (counts equal 0.1 lux at
100 ms integration time)
the Ambient Light Intensity
© Semiconductor Components Industries, LLC, 2013
March, 2013 − Rev. 1
1
Publication Order Number:
NOA3302/D
1 page  
NOA3302
Table 4. ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over 2.3 V < VDD < 3.3 V,
1.7 V < VDD_I2C < 1.9 V, −40°C < TA < 80°C, 10 pF < Cb < 100 pF) (See Note 4) (continued)
Parameter
Symbol
Min
Typ Max
Unit
Capacitive load for each bus line
(including all parasitic capacitance) (Note 6)
Cb 10
100 pF
Noise margin at the low level
(for each connected device − including hysteresis)
VnL 0.1 VDD
−V
Noise margin at the high level
(for each connected device − 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.
Table 5. OPTICAL CHARACTERISTICS (Unless otherwise specified, these specifications are for VDD = 3.3 V, TA = 25°C)
Parameter
Symbol
Min Typ Max Unit
AMBIENT LIGHT SENSOR
Spectral response, peak (Note 7)
Spectral response, low −3 dB
Spectral response, high −3 dB
Dynamic range
Maximum Illumination (ALS operational but saturated)
Resolution, Counts per lux, Tint = 800 ms
Resolution, Counts per lux, Tint = 100 ms
Resolution, Counts per lux, Tint = 6.25 ms
Illuminance responsivity, green 560 nm LED,
Ev = 100 lux, Tint = 100 ms
lp
lc_low
lc_high
DRALS
Ev_Max
CR800
CR100
CR6.25
Rv_g100
560 nm
510 nm
610 nm
0.05 52k lux
120k
lux
80 counts
10 counts
6.25 counts
1000
counts
Illuminance responsivity, green 560 nm LED,
Ev = 1000 lux, Tint = 100 ms
Rv_g1000
10000
counts
Dark current, Ev = 0 lux, Tint = 100 ms
PROXIMITY SENSOR
Rvd 0 0 3 counts
Detection range, Tint = 1200 ms, ILED = 100 mA, 860 nm IR
LED (OSRAM SFH4650), White Reflector
(RGB = 220, 224, 223), SNR = 6:1
Detection range, Tint = 600 ms, ILED = 100 mA, 860 nm IR
LED (OSRAM SFH4650), White Reflector
(RGB = 220, 224, 223), SNR = 6:1
Detection range, Tint = 300 ms, ILED = 100 mA, 860 nm IR
LED (OSRAM SFH4650), White Reflector
(RGB = 220, 224, 223), SNR = 6:1
DPS_1200_WHITE
DPS_600_WHITE
DPS_300_WHITE
100 mm
85 mm
60 mm
Detection range, Tint = 150 ms, ILED = 100 mA, 860 nm IR
LED (OSRAM SFH4650), White Reflector
(RGB = 220, 224, 223), SNR = 6:1
Detection range, Tint = 1200 ms, ILED = 100 mA, 860 nm IR
LED (OSRAM SFH4650), Grey Reflector
(RGB = 162, 162, 160), SNR = 6:1
Detection range, Tint = 1200 ms, ILED = 100 mA, 860 nm IR
LED (OSRAM SFH4650), Black Reflector
(RGB = 16, 16, 15), SNR = 6:1
Saturation power level
Measurement resolution, Tint = 150 ms
Measurement resolution, Tint = 300 ms
Measurement resolution, Tint = 600 ms
Measurement resolution, Tint = 1200 ms
7. Refer to Figure 4 for more information on spectral response.
DPS_150_WHITE
DPS_1200_GREY
DPS_1200_BLACK
PDMAX
MR150
MR300
MR600
MR1200
35 mm
70 mm
35 mm
1.0 mW/cm2
12 bits
13 bits
14 bits
15 bits
http://onsemi.com
5
5 Page 
NOA3302
Figure 22 shows an I2C read command sent by the master to the slave device. Read transactions begin in much the same
manner as the write transactions in that the slave address must be sent with a write(0) command bit.
Device
Address
A[6:0] WRITE
011 0111 0
0x6E
ACK
0
Register
Address
D[7:0] ACK
0000 0110 0
Register
Data
D[7:0] ACK
0000 0000 0
7 88
Start
Condition
Stop
Condition
Device
Address
A[6:0] READ
011 0111 1
0x6F
7
ACK
0
Register
Data [A]
D[7:0] ACK
bbbb bbbb 0
Register
Data [A+1]
D[7:0] NACK
bbbb bbbb 1
88
Start
Condition
Figure 22. I2C Read Command
Stop
Condition
After the NOA3302 sends an ACK, the master sends the
register address as if it were going to be written to. The
NOA3302 will acknowledge this as well. Next, instead of
sending data as in a write, the master will re−issue an I2C
START (repeated start) and again send the slave address and
this time the read(1) command bit. The NOA3302 will then
begin shifting out data from the register just addressed. If the
master wishes to receive more data (next register address),
it will ACK the slave at the end of the 8 bit data transmission,
and the slave will respond by sending the next byte, and so
on. To signal the end of the read transaction, the master will
send a NACK bit at the end of a transmission followed by an
I2C STOP.
The NOA3302 also supports I2C high−speed mode. The
transition from standard or fast mode to high−speed mode is
initiated by the I2C master. A special reserve device address
is called for and any device that recognizes this and supports
high speed mode immediately changes the performance
characteristics of its I/O cells in preparation for I2C
transactions at the I2C high speed data protocol rates. From
then on, standard I2C commands may be issued by the
master, including repeated START commands. When the
I2C master terminates any I2C transaction with a STOP
sequence, the master and all slave devices immediately
revert back to standard/fast mode I/O performance.
By using a combination of high−speed mode and a block
write operation, it is possible to quickly initialize the
NOA3302 I2C register bank.
http://onsemi.com
11
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| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet NOA3302.PDF ] | |
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