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SCL

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OPT3001

INT

Ambient

Light

GND

Interface

VDD

ADC

Optical

Filter

Wavelength (nm)

Normalized Response

300 400 500 600 700 800 900 1000

0.1

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0.5

0.6

0.7

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0.9

D001

OPT3001

Human Eye

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OPT3001

SBOS681B –JULY 2014–REVISED DECEMBER 2014

OPT3001 Ambient Light Sensor (ALS)

1 Features 3 Description

The OPT3001 is a sensor that measures the intensity

• Precision Optical Filtering to Match Human Eye:

of visible light. The spectral response of the sensor

– Rejects > 99% (typ) of IR

tightly matches the photopic response of the human

• Automatic Full-Scale Setting Feature Simplifies

eye and includes significant infrared rejection.

Software and Ensures Proper Configuration

The OPT3001 is a single-chip lux meter, measuring

• Measurements: 0.01 lux to 83k lux

the intensity of light as visible by the human eye. The

precision spectral response and strong IR rejection of

• 23-Bit Effective Dynamic Range with

the device enables the OPT3001 to accurately meter

Automatic Gain Ranging

the intensity of light as seen by the human eye

• 12 Binary-Weighted Full-Scale Range Settings:

regardless of light source. The strong IR rejection

< 0.2% (typ) Matching Between Ranges

also aids in maintaining high accuracy when industrial

• Low Operating Current: 1.8 µA (typ)

design calls for mounting the sensor under dark glass

for aesthetics. The OPT3001 is designed for systems

• Operating Temperature Range: –40°C to +85°C

that create light-based experiences for humans, and

• Wide Power-Supply Range: 1.6 V to 3.6 V

an ideal preferred replacement for photodiodes,

• 5.5-V Tolerant I/O

photoresistors, or other ambient light sensors with

• Flexible Interrupt System

less human eye matching and IR rejection.

• Small-Form Factor: 2.0 mm × 2.0 mm × 0.65 mm

Measurements can be made from 0.01 lux up to

83k lux without manually selecting full-scale ranges

2 Applications

by using the built-in, full-scale setting feature. This

capability allows light measurement over a 23-bit

• Display Backlight Controls

effective dynamic range.

• Lighting Control Systems

The digital operation is flexible for system integration.

• Tablet and Notebook Computers

Measurements can be either continuous or single-

• Thermostats and Home Automation Appliances

shot. The control and interrupt system features

• Point-of-Sale Terminals

autonomous operation, allowing the processor to

sleep while the sensor searches for appropriate

• Outdoor Traffic and Street Lights

wake-up events to report via the interrupt pin. The

• Cameras

digital output is reported over an I

C- and SMBus-

compatible, two-wire serial interface.

The low power consumption and low power-supply

voltage capability of the OPT3001 enhance the

battery life of battery-powered systems.

Device Information

(1)

PART NUMBER PACKAGE BODY SIZE (NOM)

Spectral Response: The OPT3001 and Human Eye

OPT3001 USON (6) 2.00 mm x 2.00 mm

(1) For all available packages, see the package option addendum

at the end of the datasheet.

Block Diagram

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Summary of content (43 pages)

PAGE 1
Sample & Buy Product Folder Support & Community Tools & Software Technical Documents OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 OPT3001 Ambient Light Sensor (ALS) 1 Features 3 Description • The OPT3001 is a sensor that measures the intensity of visible light. The spectral response of the sensor tightly matches the photopic response of the human eye and includes significant infrared rejection.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications...............................................
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 5 Pin Configuration and Functions DNP Package USON-6 (Top View) VDD 1 6 SDA ADDR 2 5 INT GND 3 4 SCL Table 1. Pin Functions PIN NO. NAME DESCRIPTION I/O 1 VDD Power 2 ADDR Digital input 3 GND Power 4 SCL Digital input 5 INT 6 SDA Device power. Connect to a 1.6-V to 3.6-V supply. Address pin. This pin sets the LSBs of the I2C address. Ground I2C clock. Connect with a 10-kΩ resistor to a 1.6-V to 5.5-V supply.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings (1) Voltage MIN MAX UNIT VDD to GND –0.5 6 V SDA, SCL, INT, and ADDR to GND –0.5 6 V 10 mA 150 °C +150 (2) °C Current into any pin Junction Temperature (1) (2) Storage, Tstg –65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 6.5 Electrical Characteristics At TA = 25°C, VDD = 3.3 V, 800-ms conversion time (CT = 1) (1), automatic full-scale range (RN[3:0] = 1100b (1)), white LED, and normal-angle incidence of light, unless otherwise specified. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OPTICAL Peak irradiance spectral responsivity Lowest full-scale range, RN[3:0] = 0000b (1) Resolution (LSB) Full-scale illuminance 0.64 lux per ADC code, 2620.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 6.6 Timing Requirements (1) MIN TYP MAX UNIT 0.4 MHz I2C FAST MODE fSCL SCL operating frequency 0.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 6.7 Typical Characteristics At TA = 25°C, VDD = 3.3 V, 800-ms conversion time (CT = 1), automatic full-scale range (RN[3:0] = 1100b), white LED, and normal-angle incidence of light, unless otherwise specified. 500 1 OPT3001 Human Eye 0.9 400 Output Response (Lux) 0.8 Normalized Response Fluorescent Halogen Incandescent 450 0.7 0.6 0.5 0.4 0.3 350 300 250 200 150 0.2 100 0.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Typical Characteristics (continued) At TA = 25°C, VDD = 3.3 V, 800-ms conversion time (CT = 1), automatic full-scale range (RN[3:0] = 1100b), white LED, and normal-angle incidence of light, unless otherwise specified. 0.1 1.020 Dark Output Response (Lux) 0.09 Relative Response 1.010 1.000 1.000 1.002 1.003 1.004 1.002 1.000 0.990 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 -40 0.980 2620.8 5241.6 10483.2 20966.4 41932.8 83865.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 Typical Characteristics (continued) 4 0.5 3.5 0.45 Supply Current (PA) Supply Current (PA) At TA = 25°C, VDD = 3.3 V, 800-ms conversion time (CT = 1), automatic full-scale range (RN[3:0] = 1100b), white LED, and normal-angle incidence of light, unless otherwise specified. 3 2.5 2 0.4 0.35 0.3 0.25 1.5 0.2 1 100 1000 10000 Input Illuminance (Lux) 0 100000 20000 D011 M[1:0] = 10b Figure 14.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 7 Detailed Description 7.1 Overview The OPT3001 measures the ambient light that illuminates the device. This device measures light with a spectral response very closely matched to the human eye, and with very good infrared rejection. Matching the sensor spectral response to that of the human eye response is vital because ambient light sensors are used to measure and help create ideal human lighting experiences.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 7.3 Feature Description 7.3.1 Human Eye Matching The OPT3001 spectral response closely matches that of the human eye. If the ambient light sensor measurement is used to help create a good human experience, or create optical conditions that are optimal for a human, the sensor must measure the same spectrum of light that a human sees. The device also has excellent infrared light (IR) rejection.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Feature Description (continued) 7.3.4 I2C Bus Overview The OPT3001 offers compatibility with both I2C and SMBus interfaces. The I2C and SMBus protocols are essentially compatible with one another. The I2C interface is used throughout this document as the primary example with the SMBus protocol specified only when a difference between the two protocols is discussed.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 7.4 Device Functional Modes 7.4.1 Automatic Full-Scale Setting Mode The OPT3001 has an automatic full-scale-range setting mode that eliminates the need for a user to predict and set the optimal range for the device. This mode is entered when the configuration register range number field (RN[3:0]) is set to 1100b. The first measurement that the device takes in auto-range mode is a 10-ms range assessment measurement.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Device Functional Modes (continued) Table 3. Latched Window-Style Comparison Mode: Flag Setting and Clearing Summary (1) (2) FLAG HIGH FIELD FLAG LOW FIELD INT PIN (3) CONVERSION READY FIELD The result register is above the high-limit register for fault count times. See the Result Register and the High-Limit Register for further details. 1 X Active 1 The result register is below the low-limit register for fault count times.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 7.4.2.3 End-of-Conversion Mode An end-of-conversion indicator mode can be used when every measurement is desired to be read by the processor, prompted by the INT pin going active on every measurement completion. This mode is entered by setting the most significant two bits of the low-limit register (LE[3:2] from the Low-Limit Register) to 11b.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 7.5 Programming The OPT3001 supports the transmission protocol for standard mode (up to 100 kHz), fast mode (up to 400 kHz), and high-speed mode (up to 2.6 MHz). Fast and standard modes are described as the default protocol, referred to as F/S. High-speed mode is described in the High-Speed I2C Mode section. 7.5.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 Programming (continued) Figure 20 and Figure 21 show the write and read operation timing diagrams, respectively. Note that register bytes are sent most significant byte first, followed by the least significant byte.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Programming (continued) 7.5.1.3 SMBus Alert Response The SMBus alert response provides a quick identification for which device issued the interrupt. Without this alert response capability, the processor does not know which device pulled the interrupt line when there are multiple slave devices connected.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 7.6 Register Maps 7.6.1 Internal Registers The device is operated over the I2C bus with registers that contain configuration, status, and result information. All registers are 16 bits long. There are four main registers: result, configuration, low-limit, and high-limit. There are also two ID registers: manufacturer ID and device ID. Table 7 lists these registers. Table 7.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 7.6.1.1 Register Descriptions NOTE Register offset and register address are used interchangeably. 7.6.1.1.1 Result Register (offset = 00h) This register contains the result of the most recent light to digital conversion. This 16-bit register has two fields: a 4-bit exponent and a 12-bit mantissa. Figure 23.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 Table 10. Examples of Decoding the Result Register into lux FRACTIONAL RESULT (R[11:0], Hex) LSB WEIGHT (lux, Decimal) 00h 001h 0.01 0.01 00h FFFh 0.01 40.95 0011 0100 0101 0110b 03h 456h 0.08 88.80 0111 1000 1001 1010b 07h 89Ah 1.28 2818.56 1000 1000 0000 0000b 08h 800h 2.56 5242.88 1001 0100 0000 0000b 09h 400h 5.12 5242.88 1010 0010 0000 0000b 0Ah 200h 10.24 5242.88 1011 0001 0000 0000b 0Bh 100h 20.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Table 11. Configuration Register Field Descriptions (continued) Bit 11 10:9 8 7 6 5 22 Field CT M[1:0] OVF CRF FH FL Type R/W R/W R R R R Reset Description 1b Conversion time field (read or write). The conversion time field determines the length of the light to digital conversion process. The choices are 100 ms and 800 ms. A longer integration time allows for a lower noise measurement.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 Table 11. Configuration Register Field Descriptions (continued) Bit 4 3 2 1:0 Field L POL ME FC[1:0] Type R/W R/W R/W R/W Reset Description 1b Latch field (read or write). The latch field controls the functionality of the interrupt reporting mechanisms: the INT pin, the flag high field (FH), and flag low field (FL).
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 7.6.1.1.3 Low-Limit Register (offset = 02h) [reset = C0000h] This register sets the lower comparison limit for the interrupt reporting mechanisms: the INT pin, the flag high field (FH), and flag low field (FL), as described in the Interrupt Reporting Mechanism Modes section. Figure 25.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 7.6.1.1.4 High-Limit Register (offset = 03h) [reset = BFFFh] The high-limit register sets the upper comparison limit for the interrupt reporting mechanisms: the INT pin, the flag high field (FH), and flag low field (FL), as described in the Interrupt Operation, INT Pin, and Interrupt Reporting Mechanisms section.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 7.6.1.1.5 Manufacturer ID Register (offset = 7Eh) [reset = 5449h] This register is intended to help uniquely identify the device. Figure 27. Manufacturer ID Register 15 ID15 R 14 ID14 R 13 ID13 R 12 ID12 R 11 ID11 R 10 ID10 R 9 ID9 R 8 ID8 R 7 ID7 R 6 ID6 R 5 ID5 R 4 ID4 R 3 ID3 R 2 ID2 R 1 ID1 R 0 ID0 R LEGEND: R = Read only Table 15.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Application Information (continued) The visible-spectrum transmission for dark windows typically ranges between 5% to 30%, but can be less than 1%. Specify a visible-spectrum transmission as low as, but no more than, necessary to achieve sufficient visual appeal because decreased transmission decreases the available light for the sensor to measure.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 Typical Application (continued) 8.2.1 Design Requirements The basic requirements of this design are: • Sensor is hidden under dark glass so that sensor is not obviously visible. Note that this requirement is subjective to designer preference. • Accuracy of measurement of fluorescent light is 15% • Variation in measurement between fluorescent, halogen, and incandescent bulbs (also known as light source variation) is as small as possible. 8.2.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com Typical Application (continued) 1 Normalized Transmission 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 300 400 500 600 700 Wavelength (nm) 800 900 1000 D018 Figure 31. Normalized Transmission Spectral Response of the Chosen Dark Window After choosing the dark window, measure the attenuating effect of the dark window for later compensation.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 Typical Application (continued) 8.2.3 Application Curves To validate that the design example now measures correctly, create a sequential number of different light intensities with the fluorescent light by using neutral density filters to attenuate the light. Different light intensities can also be created by changing the distance between the light source, and the measurement devices.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 9 Power-Supply Recommendations Although the OPT3001 has low sensitivity to power-supply issues, good practices are always recommended. For best performance, the OPT3001 VDD pin must have a stable, low-noise power supply with a 100-nF bypass capacitor close to the device and solid grounding. There are many options for powering the OPT3001 because the device current consumption levels are very low.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 10 Layout 10.1 Layout Guidelines The PCB layout design for the OPT3001 requires a couple of considerations. Bypass the power supply with a capacitor placed close to the OPT3001. Note that optically reflective surfaces of components also affect the performance of the design.
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OPT3001 SBOS681B – JULY 2014 – REVISED DECEMBER 2014 www.ti.com 11 Device and Documentation Support 11.1 Documentation Support 11.1.1 Related Documentation For related documentation see the following: • SBEA002—OPT3001: Ambient Light Sensor Application Guide • SBOU134—OPT3001EVM User's Guide • SLUA271—QFN/SON PCB Attachment Application Report 11.2 Trademarks All trademarks are the property of their respective owners. 11.3 Electrostatic Discharge Caution This integrated circuit can be damaged by ESD.
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OPT3001 www.ti.com SBOS681B – JULY 2014 – REVISED DECEMBER 2014 12.2 DNP (S-PDSO-N6) Mechanical Drawings Figure 36. Package Orientation Visual Reference of Pin 1 (Top View) Top View 0.49 0.39 0.09 Side View Figure 37.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Dec-2014 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Dec-2014 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant OPT3001DNPR USON DNP 6 3000 330.0 18.4 2.3 2.3 0.9 8.0 12.0 Q1 OPT3001DNPT USON DNP 6 250 180.0 12.4 2.3 2.3 0.9 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Dec-2014 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) OPT3001DNPR USON DNP 6 3000 356.0 338.0 48.0 OPT3001DNPT USON DNP 6 250 193.0 193.0 70.
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PACKAGE OUTLINE DNP0006A USON - 0.65 mm max height PLASTIC SMALL OUTLINE NO-LEAD 4221434/A 03/2014 NOTES: 1. 2. 3. 4. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. This drawing is subject to change without notice. The package thermal pad must be soldered to the printed circuit board for thermal and mechanical performance. Optical package with clear mold compound. www.ti.
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EXAMPLE BOARD LAYOUT DNP0006A USON - 0.65 mm max height PLASTIC SMALL OUTLINE NO-LEAD 4221434/A 03/2014 NOTES: (continued) 5. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature number SLUA271 (www.ti.com/lit/slua271) . www.ti.
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EXAMPLE STENCIL DESIGN DNP0006A USON - 0.65 mm max height PLASTIC SMALL OUTLINE NO-LEAD 4221434/A 03/2014 NOTES: (continued) 6. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.