|
|
|
부품번호 | NOA1312 기능 |
|
|
기능 | High-Precision Ambient Light Sensor | ||
제조업체 | ON Semiconductor | ||
로고 | |||
전체 16 페이지수
NOA1312
Product Preview
High-Precision Ambient
Light Sensor with Three I2C
Slave Addresses, EEPROM
and Dark Current
Compensation
Description
The NOA1312 high−precision ambient light sensor (ALS) is
designed for very high accuracy (better than ±5% tolerance) handheld
applications. The device integrates a 16−bit ADC, a 2−wire I2C digital
interface with three pin−selectable I2C slave addresses, internal clock
oscillator, EEPROM and a power down mode. A photopic optical color
filter together with built in dynamic dark current compensation and
precision calibration capability plus excellent IR and 50/60 Hz flicker
rejection enables highly accurate measurements from very low light
levels to full sunlight. The device can support simple count equals lux
readings in interrupt−driven or polling modes. The NOA1312
employs proprietary CMOS image sensing technology from
ON Semiconductor to provide large signal to noise ratio (SNR) and
wide dynamic range (DR) over the entire operating temperature range.
Features
• Senses Ambient Light and Provides an Output Count Proportional to
the Ambient Light Intensity
• Human Eye Spectral Response using Photopic Optical Filter
• Dynamic Dark Current Compensation
• Very High Accuracy (better than ±5% tolerance)
• Ev Sensitivity of 5.2 Counts/lux
• Three I2C Slave Addresses (0x29, 0x39 and 0x49), Pin Selectable
• Less than 240 mA Active Power Consumption in Normal Operation
• Ultra−low Quiescent Power Dissipation, less than 100 nA in Power
Down Mode (below 50°C)
• Interrupt Signal Notifies Host of Significant Intensity Changes
• Internal EEPROM Stores Values to Minimize Programming Time
• Register Values Preserved during Power−down Mode
• Wide Operating Voltage Range (2.4 V to 3.6 V)
• Wide Operating Temperature Range (−40°C to 85°C)
• Linear Response over the Full Operating Range
• Senses Intensity of Ambient Light from 0.096 lux to Full Sunlight
• Programmable Integration Times
• No External Components Required
• Built−in 16−bit ADC
• I2C Serial Communication Port Supports Standard and Fast Modes
• This Device is Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
http://onsemi.com
CUDFN6
CU SUFFIX
CASE 505AD
PIN ASSIGNMENT
VSS
INT
SCL
1
VDD
AD
SDA
(Top View)
ORDERING INFORMATION
Device
NOA1312CUTAG
Package
CUDFN6
(Pb−Free)
Shipping†
2500 / Tape &
Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
Applications
• Saves Display Power in Applications such as:
− Tablets, LED Backlit Displays,
Smart Phones, Netbooks, PDAs,
MP3 Players, GPS
− Video Recorders
© Semiconductor Components Industries, LLC, 2011
November, 2011 − Rev. P0
1
Publication Order Number:
NOA1312/D
NOA1312
Table 5. OPTICAL CHARACTERISTICS (Unless otherwise specified, these specifications are for VDD = 3.0 V, TA = 25°C)
Parameter
Test Conditions
Symbol
Min
Typ Max
Unit
Irradiance responsivity
Trimmed response
lp (see Figure 4)
White LED light source, Ev = 100 lux,
Tint = 200 ms (see Figure 7)
Re 550 nm
Rv_trim 494 520 546 Counts
Dark response
Ev = 0 lux, Tint = 400 ms, VDD = 2.4 to
3.6 V,−40_C to 85_C
Rv_dark
0 1 Counts
Illuminance responsivity
White LED light source, Ev = 12,603 lux,
Tint = 200 ms
(see Figure 5, Figure 6, Note 7)
Rv_max
65,535
Counts
Counts vs Vdd
Ev = 100 lux, Tint = 200 ms, VDD = 2.4 to
3.6 V, relative to VDD = 3.0 V
dC/dVDD
−5
5%
Counts vs Temperature
(−40°C to 0°C)
Ev = 100 lux, Tint = 200 ms, VDD = 3.0 V,
−40°C to 0°C, relative to room temperature
(25°C)
dC/dTlow
−20
20 %
Counts vs Temperature
(0°C to 85°C)
Ev = 100 lux, Tint = 200 ms, VDD = 3.0 V,
0°C to 85°C, relative to room temperature
(25°C)
dC/dThigh
−5
5%
Linearity (Low Ev)
White LED light source, Ev = 0 − 15 lux,
Tint = 200 ms
Llow (5.2*Ev )−5
(5.2*Ev)+2 Counts
Linearity (High Ev)
White LED light source, Ev = 15 − 16,250
lux, Tint = 200 ms (Note 8)
Lhigh
−5
3.5 %
Count stability
Ev = 100 lux, Tint = 200 ms, VDD = 3.0 V
(Note 9)
dC/dt
−1
1%
Trimming range
Ev = 100 lux, Tint = 200 ms, −37% to
+65%, VDD = 2.4 to 3.6 V, −40°C to 85°C
(Note 10)
TRIMrange
315
825 Counts
7. The maximum count that can be accumulated in a 16−bit register is 65,535.
8. Linearity (high Ev) is estimated using the following formula:
Linearity (High Ev) = ((Counts(n) – Ideal_counts(n))/ Ideal_counts(n)))* 100
where:
n is an Ev value between 0 lux and 16,250 lux
Ideal_counts (at any Ev): 5.2 counts/lux (Tint = 200 ms)
Linearity values shown above after the final trimming.
9. Count stability is measured over a duration of 5 minutes using a stable white LED at Ev = 100 lux, VDD = 3.0 V, TA = 25°C
10. Output counts prior to trimming: low counts = 520/1.65, high counts = 520/0.63.
Figure 3. AC Characteristics
http://onsemi.com
4
4페이지 NOA1312
TYPICAL CHARACTERISTICS
100 200
80 160
60 120
40 80
20
0
2.0 2.5 3.0 3.5
VDD (V)
Figure 16. Supply Current in Power Down
Mode vs. Supply Voltage
(100 lux, Tint = 200 ms)
4.0
40
0
2.0 2.5 3.0 3.5 4.0
VDD (V)
Figure 17. Supply Current vs. Supply Voltage
(100 lux, Tint = 200 ms)
CL = 250 pF (including all parasitic capacitances)
Rp = 1 K
Fall time tf = 36 ns
Figure 18. SDA and INT Fall Time (tf)
http://onsemi.com
7
7페이지 | |||
구 성 | 총 16 페이지수 | ||
다운로드 | [ NOA1312.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
NOA1312 | High-Precision Ambient Light Sensor | ON Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |