Optical Sensor Product Data Sheet LTR-579ALS-01 Spec No. :DS86-2015-0005 Effective Date: 07/27/2017 Revision: - LITE-ON DCC RELEASE BNS-OD-FC001/A4 LITE-ON Technology Corp. / Optoelectronics No.90,Chien 1 Road, Chung Ho, New Taipei City 23585, Taiwan, R.O.C. Tel: 886-2-2222-6181 Fax: 886-2-2221-1948 / 886-2-2221-0660 http://www.liteon.com/opto Optical Sensor LTR-579ALS-01 1. Description The LTR-579ALS-01 is an integrated low voltage I2C ambient light sensor (ALS), and a proximity sensor (PS), with built-in emitter in a single miniature chipled lead-free surface mount package. The ALS provides a linear response over a wide dynamic range, which is well suited to applications under very low or bright ambient brightness. Besides, with built-in proximity sensor, this sensor offers the feature to detect object at a user configurable distance. The sensor has a programmable interrupt with hysteresis to response to events and that removes the need to poll the sensor for a reading which improves system efficiency. This CMOS design and factory-set one time trimming capability ensure minimal sensor-to-sensor variations for ease of manufacturability to the end customers. 2. Features • I2C interface (Standard mode @100kHz or Fast mode @400kHz) • Ambient Light and Proximity Sensing in one ultra-small ChipLED package • Very low power consumption with sleep mode capability • Operating voltage ranges: 1.7V to 3.6V • Operating temperature ranges: -40 to +85 ºC • Built-in temperature compensation circuit • Programmable interrupt function for ALS and PS with upper and lower thresholds • RoHS and Halogen free compliant ALS Features 16 to 20 bits effective resolution Wide dynamic range with linear response Close to human eye spectral response Automatic rejection for 50Hz/60Hz lighting flicker PS Features Built-in LED driver and detector High ambient light suppression 8 , 9, 10, 11-bit(selectable) effective resolution Cancellation of crosstalk Programmable LED drive settings 1/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 3. Applications • Control brightness of display panel • Object detection in mobile, computing, and consumer devices. 4. Ordering Information Part Number Packaging Type Package Quantity LTR-579ALS-01 Tape and Reel 8-pin chipled package 8000 5. Outline Dimensions Note: 1. All dimension in millimeter. 2. All dimension tolerance is 0.2mm unless specified. 2/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 6. Functional Block Diagram LTR-579ALS-01 contains 2 photodiodes (Visible and IR diode) for respective photocurrent measurement. The photodiode currents are converted to digital values by ADCs. The sensor also included an emitter LED, as well as some peripheral circuits such as an internal oscillator, a current source, voltage reference, and internal fuses to store trimming information. 3/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 7. Application Circuit Note: It is a must that VDD and VLED to be separated. I/O Pins Configuration Table Pin I/O Type Symbol Description 1 IN/OUT SDA I2C serial data 2 OUT INT Interrupt 3 OUT LDR Connect to LED Cathode 4 OUT LEDK LED Cathode. Connect to LDR pin if internal LED driver circuit is used 5 IN LEDA LED Anode. Connect to VBAT on PCB 6 Ground GND Ground 7 IN SCL I2C serial clock 8 Supply VDD Power Supply Voltage Recommended Application Circuit Components [1] Component Recommended Value Rp1, Rp2, Rp3 [1] 1 kΩ to 10 kΩ C1, C3 1uF ±20%, X7R / X5R Ceramic C2 0.1uF Selection of pull-up resistors value is dependent on bus capacitance values. For more details, please refer to I2C Specifications: http://www.nxp.com/documents/user_manual/UM10204.pdf 4/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 8. Ratings and Specifications Absolute Maximum Ratings at Ta = 25°°C Parameter Symbol Min. Max Unit 4.0 V Supply Voltage VDD Digital Voltage Range SCL, SDA, INT -0.5 4.0 V Max Voltage Range LDR -0.5 4.0 V Storage Temperature Tstg -40 100 °C 2000 V Electrostatic Discharge Protection VHBM (Human Body Model JESD22-A114) Note: Exceeding these ratings could cause damage to the sensor. All voltages are with respect to ground. Currents are positive into, negative out of the specified terminal. Recommended Operating Conditions Description Symbol Min. Supply Voltage VDD LED Supply Voltage Max. Unit 1.7 3.6 V VLED 2.3 4.5 V Interface signal input high VI2Chigh 1.5 VDD V Interface signal input low VI2Clow 0 0.4 V Tope -40 85 °C Operating Temperature Typ. Electrical & Optical Specifications All specifications are at VDD = 2.8V, Tope = 25°C, unless otherwise noted. Parameter Min. Typ. Max. 260 Unit Condition uA Active mode Supply Current 150 ALS Active Supply Current 110 uA PS Active Supply Current 95 uA Max. duty cycle, Vdd=2.8V, Gain3 33x Max. duty cycle, Vdd=2.8V Standby Current 1 uA Shutdown Mode Wakeup Time from Standby 5 ms From Standby to Active mode where measurement can start 10 5/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 Characteristics Ambient Light Parameter Min. Typ. Max. Unit Condition Programmable for 16, 17, 18, 19, 20 Bit ALS Resolution 16 20 Bit ALS Lux accuracy -10 +10 % 5 Count 0 Lux, 18-bit resolution With 50/60Hz Rejection Dark Level Count 0 Min. Integration time 50 400 ms 50/60 Hz flicker noise error -5 +5 % Max. Unit 11 Bit Characteristics Proximity Sensor Parameter PS Resolution Min. Typ. 8 Sensitivity Range 940 nm Detection Distance 10 cm LED Pulse Current 2.5 125 mA LED Pulse Frequency 60 100 kHz LED Duty Cycle Number of LED Pulses Ambient Light Suppression 50 1 Condition No window, 32 pulses, 60kHz, 100mA, 18% Gray Card Configurable for 2.5,5,10,25,50,75,100 & 125mA % 32 Pulses 100 klux Direct sunlight 6/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 Typical Device Parameter (VDD = 2.8V, Ta=25°C, Default power-up settings, un less otherwise noted) ALS Spectral Response Angular of Incidence Figure 4.1 : Spectral response for ALS Figure 4.2 ALS Sensitivity vs. Angular of Incidence PS response Angular of LED Normalized LED emission profile 1.2 1 0.8 0.6 ydir 0.4 xdir 0.2 0 -60 -40 -20 0 20 40 60 Angle in degrees Figure 4.4 LED Angular of incidence Figure 4.3 PS count Vs distance (without window) 7/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 AC Electrical Characteristics All specifications are at VBus = 1.7V, Tope = 25°C, unless otherwise noted. Parameter Symbol f SCL SCL clock frequency Min. 1 Max. Unit 400 kHz Bus free time between a STOP and START condition t BUF 1.3 us Hold time (repeated) START condition. After this period, the first clock pulse is generated t HD ; STA 0.6 us LOW period of the SCL clock t LOW 1.3 us HIGH period of the SCL clock t HIGH 0.6 us Set-up time for a repeated START condition t SU ; STA 0.6 us Set-up time for STOP condition t SU ; STO 0.6 us Rise time of both SDA and SCL signals tr 30 300 ns Fall time of both SDA and SCL signals tf 30 300 ns Data hold time t HD ; DAT 0.3 0.9 us Data setup time t SU ; DAT 100 Pulse width of spikes which must be suppressed by the input filter t SP 0 ns 50 ns Definition of timing for I2C bus 8/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 9. Principles of Operation I2C Protocols ．I2C Write Protocol (type 1): ．I2C Write Protocol (type 2): ．I2C Read Protocol: 9/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 ．I2C Read (Combined format) Protocol: A Acknowledge (0 for an ACK) N Non-Acknowledge(1 for an NACK) S Start condition Sr Repeated Start condition P Stop condition W Write (0 for writing) R Read (1 for read) Slave-to-master Master-to-Slave I2C Slave Address The 7 bits slave address for this sensor is 0x53H. A read/write bit should be appended to the slave address by the master device to properly communicate with the sensor. I2C Slave Address (0x53H) W/R Command Type Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Write 1 0 1 0 0 1 1 0 0xA6H Read 1 0 1 0 0 1 1 1 0xA7H value 10/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 Register Set Addr R/W Register Name Description Reset Value 0x00 RW MAIN_CTRL ALS, PS operation mode control, SW reset 0x00 0x01 R/W PS_ LED PS LED settings 0x36 0x02 R/W PS_PULSES PS number of LED pulses 0x08 0x03 R/W PS_MEAS_RATE PS measurement rate in active mode 0x45 0x04 R/W ALS_MEAS_RATE ALS measurement rate and resolution in Active Mode 0x22 0x05 R/W ALS_GAIN ALS analog Gain 0x01 0x06 R PART_ID Part number ID and revision ID 0xB1 0x20 0x07 R MAIN_STATUS Power-On status, Interrupt status, Data status 0x08 R PS_DATA_0 PS measurement data, least significant bits 0x00 0x09 R PS_DATA_1 PS measurement data, most significant bits, and overflow 0x00 0x0D R ALS_DATA_0 ALS ADC measurement data, LSB 0x00 0x0E R ALS_DATA_1 ALS ADC measurement data 0x00 0x00 0x0F R ALS_DATA_2 ALS ADC measurement data, MSB 0x19 R/W INT_CFG Interrupt configuration 0x10 0x1A R/W INT_PST Interrupt persist setting 0x00 0x1B R/W PS_THRES_UP_0 PS interrupt upper threshold, LSB 0xFF 0x1C R/W PS_THRES_UP_1 PS interrupt upper threshold, MSB 0x07 0x1D R/W PS_THRES_LOW_0 PS interrupt lower threshold, LSB 0x00 0x1E R/W PS_THRES_LOW_1 PS interrupt lower threshold, MSB 0x00 0x00 0x1F R/W PS_CAN_0 PS intelligent cancellation level setting, LSB 0x20 R/W PS_CAN_1 PS intelligent cancellation level setting, MSB 0x00 0x21 R/W ALS_THRES_UP_0 ALS interrupt upper threshold, LSB 0xFF 0x22 R/W ALS_THRES_UP_1 ALS interrupt upper threshold, intervening bits 0xFF 0x23 R/W ALS_THRES_UP_2 ALS interrupt upper threshold, MSB 0x0F 0x24 R/W ALS_THRES_LOW_0 ALS interrupt lower threshold, LSB 0x00 0x25 R/W ALS_THRES_LOW_1 ALS interrupt lower threshold, intervening bits 0x00 0x26 R/W ALS_THRES_LOW_2 ALS interrupt lower threshold, MSB 0x00 11/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 MAIN_CTRL Register (0x00) (Read/Write) This register controls the operation modes of ALS, which can be set to either standby or active mode. When writing to this register, it will cause a stop to any ongoing measurements (both ALS and PS) and start new measurement. 0x00 MAIN_CTRL (default = 0x00) B7 B6 B5 Reserved Field Bits Default Reserved 7:5 000 SW Reset 4 0 Reserved 2:3 00 ALS Enable 1 0 PS Enable 0 B4 B3 B2 B1 B0 Software Reset Reserved Reserved ALS Enable PS Enable Description -- -- 0 Software reset is NOT triggered (default) 1 Software reset is triggered -- -- 0 ALS standby(default) 1 ALS active 0 PS standby(default) 1 PS active 0 12/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PS_LED Register (0x01) (Read/Write) This register controls the LED driving current and the LED pulse modulation frequency. 0x01 PS_LED (default = 0x36) B7 Reserved B6 B5 B4 LED Pulse Modulation Frequency Field Bits Default Reserved 7 0 B3 B2 Reserved B1 B0 LED Current Description - - 000 Reserved 001 Reserved 010 Reserved 011 LED pulse period = 60kHz(default) 100 LED pulse period = 70kHz 101 LED pulse period = 80kHz 110 LED pulse period = 90kHz 111 LED pulse period = 100kHz LED pulse modulation 4:6 011 Frequency Reserved LED current 3 2:0 0 - - 000 LED pulsed current level = 2.5mA 001 LED pulsed current level = 5.0mA 010 LED pulsed current level = 10mA 011 LED pulsed current level = 25mA 100 LED pulsed current level = 50mA 101 LED pulsed current level = 75mA 110 LED pulsed current level = 100mA (default) 111 LED pulsed current level = 125mA 110 13/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PS_PULSES Register (0x02) (Read/Write) This register controls number of PS LED pulses emitted. (up to 32 pulses). 0x02 PS_PULSES (default = 0x08) B7 B6 B5 B4 Reserved Field Bits Default Reserved 7:6 00 B3 B2 B1 B0 Number of LED Pulses Description 00 Reserved 00 0000 0 pulse (no light emission) 00 0001 1 pulse 00 0010 2 pulses Number of … LED 5:0 … 00 1000 00 1000 8 pulses (default) pulses … … 10 0000 32 pulses 1X XXXX Reserved 14/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PS_MEAS_RATE Register (0x03) (Read/Write) This register controls the timing of the periodic measurements of the PS during active mode. When the measurement rate is programmed to be faster than possible for the programmed ADC measurement, the rate will be lowered than programmed (maximum speed). 0x03 PS_MEAS_RATE (default = 0x45) B7 B6 B5 0 1 0 Field Bits Default Reserved 7:5 010 B4 B3 PS Resolution/Bit Width B2 B1 B0 PS Measurement Rate Description Must write 010 00 8 bit(default) 01 9 bit 10 10 bit 11 11 bit PS Resolution/Bit 4:3 00 Width 000 Reserved 001 6.25ms 010 12.5ms 011 25 ms 100 50ms 101 100ms(default) 110 200ms 111 400ms PS Measurement 2:0 101 Rate 15/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 ALS_MEAS_RATE Register (0x04) (Read/Write) This register controls ALS measurement resolution, Gain setting and measurement rate. When the measurement rate is programmed to be faster than possible for the programmed ADC measurement, the rate will be lowered than programmed (maximum speed). 0x04 ALS _MEAS_RATE (default = 0x22) B7 B6 Reserved Bits Default Reserved 7 0 6:4 B4 ALS/C Resolution/Bit Width Field ALS Resolution B5 3 Reserved B2 B1 B0 ALS Measurement Rate Description -- -- 000 20 Bit, Conversion time = 400ms 001 19 Bit, Conversion time = 200ms 010 18 Bit, Conversion time = 100ms(default) 011 17 Bit, Conversion time = 50ms 100 16 Bit, Conversion time = 25ms 010 101/110/111 Reserved B3 0 -- Reserved -- 000 25ms 001 50ms 010 100ms (default) 011 500ms 101 1000ms 110/111 2000ms ALS Measurement 2:0 010 Rate 16/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 ALS_ GAIN Register (0x05) (Read/Write) This register controls ALS measurement Gain Range. 0x05 ALS_GAIN (default = 0x01) B7 B6 B5 B4 B3 Reserved Field Bits Default Reserved 7:3 00000 ALS Gain 2:0 001 B2 B1 B0 ALS Gain Range Description -- -000 Gain Range: 1 001 Gain Range: 3 (default) 010 Gain Range: 6 011 Gain Range: 9 100 Gain Range: 18 Range 17/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PART_ID Register (0x06) (Read Only) This register defines the part number and revision identification of the sensor. 0x06 PART_ID (default = 0xB1) B7 B6 B5 B4 Part Number ID Field Bits Default Part Number ID 7:4 1011 Part Number ID Revision ID 3:0 0001 Revision ID B3 B2 B1 B0 Revision ID Description 18/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 MAIN_STATUS Register (0x07) (Read Only) This register stores the information about the ALS and PS interrupts and data status. The interrupt status in Bit 4 and Bit 1 determines if the ALS and PS interrupt criteria are met in Normal Interrupt Mode. It triggers when the ALS and/or PS data is above the upper or below the lower threshold for a specified number of consecutive measurements in respective interrupt persist settings. This register also provides PS logic signal status, which is used for indicating whether the detected object is near (PS data larger than PS upper threshold settings) or far (PS data smaller than PS lower threshold settings). For details interrupt behavior, refer to Section 10. 0x07 MAIN_STATUS (default = 0x20) B7 B6 Reserved Field Bits Default Reserved 7:6 00 B5 B4 B3 B2 B1 B0 Power ON Status ALS Interrupt Status ALS Data Status PS Logic Signal Status PS Interrupt Status PS Data Status Description -- Power on event and All interrupt threshold settings in the registers Power On 5 0 0 Status ALS Interrupt Status -- have been rest to power on default states (either due to part turned on or power supply voltage glitch). Flag is cleared after read. 4 ALS Data 3 0 Interrupt is NOT triggered (default) 1 Interrupt is triggered and will be cleared after read 0 ALS data is old data (Data has been read) 0 0 Status 1 ALS data is new data (Data has not been read and will be cleared after read) PS Logic Signal Status PS Interrupt Status 2 1 0 Object is far (default) 1 Object is near 0 Interrupt is NOT triggered (default) 1 Interrupt is triggered and will be cleared after read 0 PS data is old data (Data has been read) 0 PS Data Status 0 0 0 1 PS data is new data (Data has not been read and will be cleared after read) 19/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PS_DATA Register (0x08 / 0x09) (Read Only) The PS ADC channel data are expressed as an 11-bit data spread over 2 registers. The PS_DATA_0 and PS_DATA_1 registers provide the lower and upper byte respectively. An overflow bit is available to check if the PS data overflows. When I2C read operation is active and points to any of the register address between 0x07 and 0x18, both registers PS_DATA_0 and PS_DATA_1 will be locked until the I2C read operation has been completed or the specified address range is left. New measurement data is stored into temporary registers and the PS_DATA registers will be updated as soon as there is no on-going I2C read operation to the address range 0x07 to 0x18. 0x08 PS_DATA_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 PS Data Low 0x09 PS_DATA_1 (default = 0x00) B7 B6 B5 B4 B3 Reserved Field Overflow Address Bits Default 0x08 7:0 00000000 -- PS ADC lower byte data Reserved 0x09 7:4 000 -- -- 0 Valid PS data (default) Overflow 0x09 3 0 1 Overflow of PS data -- PS ADC upper byte data PS Data High Description PS Data, Low PS Data, 0x09 2:0 000 High 20/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 ALS_DATA Register (0x0D / 0x0E / 0x0F) (Read Only) The ALS Channel digital output data are expressed as a 16 to 20 bit unsigned integer data. When I2C read operation is active and points to any of the register address between 0x07 and 0x18, all 3 registers will be locked until the I2C read operation has been completed or the specified address range is left. This is to ensure that the data in the registers is from the same measurement even if an additional measurement cycle ends during the read operation. New measurement data is stored into temporary registers and the ALS_DATA registers will be updated as soon as there is no on-going I2C read operation to the address range 0x07 to 0x18. 0x0D ALS_DATA _0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 B2 B1 B0 ALS DATA, Low 0x0E ALS DATA_ 1 (default = 0x00) B7 B6 B5 B4 B3 ALS DATA, Middle 0x0F ALS_DATA_ 2 (default = 0x00) B7 B6 B5 B4 Reserved B3 ALS DATA, High Field Address Bits Default Description ALS Data, Low 0x0D 7:0 00000000 ALS Data lower byte data ALS Data, Middle 0x0E 7:0 00000000 ALS Data Middle byte data 7:4 0000 Reserved ALS Data, High 0x0F 3:0 0000 ALS Data Higher byte data 21/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 INT_CFG Register (0x19) (Read/Write) This register controls the operation of the interrupt pin and functions. ALS and PS have independent interrupt signal and both ALS and PS interrupts are active low. PS interrupt is enabled by Bit 0, and it is threshold triggered based. Besides, ALS interrupt is enabled by Bit 2, and its output pin can be selected as either Normal Interrupt Mode or PS Logic Output Mode through Bit 1. Under Normal Interrupt Mode, the edge-triggered interrupt signal output will be maintains at active level until MAIN_STATUS register is read. While for PS Logic Output Mode, the interrupt pin output is updated after every measurement and output state is maintained between measurements. 0x19 INT_CFG (default = 0x10) B7 B6 Reserved Bits Default Reserved 7:6 00 4:5 01 Select Reserved ALS Interrupt 3 0 2 0 Pin Enable 1 B2 B1 B0 Reserved ALS INT PIN ENABLE PS OUTPUT MODE PS INT PIN ENABLE -- -- 00 Reserved 01 ALS Channel(Default) 0 Must be 0 0 ALS interrupt disabled (default) 1 ALS interrupt enabled Normal Interrupt Mode: After interrupt event, INT output pin maintains active level until MAIN_STATUS register is read (default) 0 MODE B3 Description 0 PS OUTPUT B4 ALS INT SELECT Field ALS Interrupt B5 1 PS Logic Output Mode: INT output pin is updated after every measurement and maintains output state between measurements. PS Interrupt Pin Enable 0 0 PS interrupt enabled (default) 1 PS interrupt enabled 0 22/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 INT_PST Register (0x1A) (Read/Write) This register controls the N number of times the measurement data is outside the range defined by the upper and lower threshold limits before asserting the interrupt. 0x1A INT_PST (default = 0x00) B7 B6 B5 B4 B3 ALS Persist Field Bits B2 B1 B0 PS Persist Default Description 0000 Every ALS value out of threshold range asserts an interrupt (default) 0001 ALS 7:4 interrupt 0000 Persist 2 consecutive ALS values out of threshold range assert an … 1111 … 16 consecutive ALS values out of threshold range assert an interrupt 0000 Every PS value out of threshold range asserts an interrupt (default) 0001 PS Persist 3:0 2 consecutive PS values out of threshold range assert an interrupt 0000 … 1111 … 16 consecutive PS values out of threshold range assert an interrupt 23/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PS_THRES Register (0x1B / 0x1C / 0x1D / 0x1E) (Read/Write) The PS_THRES_UP and PS_THRES_LOW registers determines the upper and lower limit of the interrupt threshold value respectively. Interrupt will be triggered if measurement data in PS_DATA registers is exceeding the upper and lower limits. 0x1B PS_THRES_UP_0 (default = 0xFF) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 PS Upper Threshold, Low 0x1C PS_THRES_UP_1 (default = 0x07) B7 B6 B5 B4 B3 Reserved 0x1D PS Upper Threshold, High PS_THRES_LOW_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B1 B0 PS Lower Threshold, Low 0x1E PS_THRES_LOW_1 (default = 0x00) B7 B6 B5 B4 B3 Reserved B2 PS Lower Threshold, High Field Address Bits Default PS Upper Threshold, Low 0x1B 7:0 11111111 Reserved 0x1C 7:3 00000 0x1C 2:0 111 PS Upper Interrupt Threshold, High byte 0x1D 7:0 00000000 PS Lower Interrupt Threshold, Low byte Reserved 0x1E 7:3 00000 PS Lower Threshold, High 0x1E 2:0 000 PS Upper Threshold, High PS Lower Threshold, Low Description PS Upper Interrupt Threshold, Low byte -- -PS Lower Interrupt Threshold, High byte 24/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PS_CAN Register (0x1F / 0x20) (Read/Write) This register defines the offset compensation value for proximity offsets caused by device variations, optical crosstalk and other environment factors. This register sets the PS cancellation value to be subtracted from the measured PS data before the data is transferred to the PS_DATA registers. 0x1F PS_CAN_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 PS Cancellation Level, Low 0x20 PS_CAN_1 (default = 0x00) B7 B6 B5 B4 B3 Reserved Field PS Cancellation Address Bits Default 0x1F 7:0 00000000 0x20 7:3 00000 0x20 2:0 000 PS Cancellation Level, High Description PS Cancellation Level, Low byte Level, Low Reserved PS Cancellation -PS Cancellation Level, High byte Level, High 25/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 ALS_THRES Register (0x21 / 0x22 / 0x23 / 0x24 / 0x25 / 0x26) (Read/Write) The ALS_THRES_UP (up to 20-bits) and ALS_THRES_LOW (up to 20-bits) registers determines the upper and lower limit of the interrupt threshold value respectively. Interrupt will be triggered if measurement data in ALS_DATA is exceeding the upper and lower limits. 0x21 ALS_THRES_UP_0 (default = 0xFF) B7 B6 B5 B4 B3 B2 B1 B0 B1 B0 B1 B0 ALS Upper Threshold, Low 0x22 ALS_THRES_UP_1 (default = 0xFF) B7 B6 B5 B4 B3 B2 ALS Upper Threshold, Mid 0x23 ALS_THRES_UP_2 (default = 0x0F) B7 B6 B5 B4 B3 Reserved 0x24 B2 ALS Upper Threshold, High ALS_THRES_LOW_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B1 B0 B1 B0 ALS Lower Threshold, Low 0x25 ALS_THRES_LOW_1 (default = 0x00) B7 B6 B5 B4 B3 B2 ALS Lower Threshold, Mid 0x26 ALS_THRES_LOW_2 (default = 0x00) B7 B6 B5 Reserved B4 B3 B2 ALS Lower Threshold, High 26/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 Field Address Bits Default Description 0x21 7:0 11111111 ALS upper interrupt threshold, Low byte 0x22 7:0 11111111 ALS upper interrupt threshold, Mid byte 7:4 0000 Reserved 3:0 1111 ALS upper interrupt threshold, High byte 0x24 7:0 00000000 ALS lower interrupt threshold, Low byte 0x25 7:0 00000000 ALS lower interrupt threshold, Mid byte 7:4 0000 Reserved 3:0 0000 ALS lower interrupt threshold, High byte ALS Upper Threshold, Low ALS Upper Threshold, Mid ALS Upper 0x23 Threshold, High ALS Lower Threshold, Low ALS Lower Threshold, Mid ALS Lower 0x26 Threshold, High 27/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 10. Application Information 10.1 Lux Formula Lux_Calc is the calculated lux reading and ALS DATA is the digital representation (output ADC) of ambient light level stored in the registers (Address: 0x0D-0x0F) regardless of light sources. For no window (Clear window) For device under window (eg: Tinted window) Window Factor is needed when device under Window glass with coated tinted ink. This is to compensate the light loss due to the lower transmission rate of the window glass. Where: ALS Gain GAIN Resolution (bit) / Integration Time (ms) INT X1 1 16-bit, 25ms 0.25 X3 3 17-bit, 50ms 0.5 X6 6 18-bit, 100ms 1 X9 9 19-bit, 200ms 2 X18 18 20-bit, 400ms 4 28/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 10.2 Device Operation (State Machine and Interrupt Features) State Machine Below diagram is the main state machine of LTR-579ALS. During the ALS and PS Operation, ALS measurements can be activated by setting the ALS_Enable bit to 1, and PS measurement can be activated by setting the PS_Enable bit to 1. As soon as the PS and/or the ALS sensors become activated through an I2C command, the internal support blocks are powered on. Once the voltages and currents are settled (typically after 5ms), the state machine checks for trigger events from a measurement scheduler to start ALS or PS conversions according to the selected measurement repeat rates. Once PS_Enable or ALS_Enable is changed back to 0, a running conversion on the respective channel will be completed and the relevant ADCs and support blocks will move to power-down state. 29/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 Interrupt Features This device generates independent ALS and PS interrupt signals that can be multiplexed and output to the INT output pin. The interrupt conditions are always evaluated after completion of a new conversion of the ALS and PS channels. The PS Logic Mode has priority over any other interrupt signal. If selected (PS Logic Mode = 1), no ALS interrupt can be signaled at the INT pad. ALS and PS interrupts as well as PS Logic Mode are active low at the INT pin. 30/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 ALS Interrupt The ALS interrupt is enabled by Bit 2 (ALS INT Pin Enabled) of INT_CFG register (0x19). The ALS interrupt source is ALS channel. The INT is set when the data of the selected interrupt source is above the upper or below the lower threshold for a specified number of consecutive measurements set in ALS Persist in INT_PST register (0x1A). The Interrupt signal is also stored in MAIN_STATUS register (0x07) as flag bit in Bit 4 (ALS INT Status). This status flag bit is cleared by reading the MAIN_STATUS register. A cleared flag will also clear the interrupt signal on the INT pin. PS Interrupt The PS interrupt is enabled by Bit 0 (PS Interrupt Pin Enable). It triggers when the PS conversion result is above the upper or below PS threshold for a specified number of consecutive measurements set in PS Persist in INT_PST register (0x1A). The PS Logic Signal, Bit 2 of MAIN_STATUS register (0x07), is set to 0 when the PS data is below the lower PS threshold and it set to 1 if the PS data is above the upper PS threshold. There are two options to indicate a PS interrupt signal on the INT pin: as a continuous logic signal or as an edge-triggered interrupt signal, which is cleared with the next read-out of the MAIN-STATUS register. The PS interrupt signal is also stored in MAIN_STATUS register (0x07) as flag bit in Bit 1 (PS INT Status). This status flag bit is cleared by reading the MAIN_STATUS register. The PS interrupt behavior is as shown below. 31/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 32/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 11. Pseudo Codes Examples Slave address Slave_Addr = 0xA6 MAIN_CTRL Register // This defines the operating modes of the ALS // Default settings is 0x00 ( ALS standby, PS standby) Register_Addr = 0x00 Command = 0x03 // MAIN_CTRL register // ALS/PS in Active Mode, WriteByte(Slave_Addr, Register_Addr, Command); PS_LED Register // This defines the LED pulse modulation frequency and Peak current. // Default setting is 0x36 (Pulse Freq = 60kHz, peak current = 100mA). Register_Addr = 0x01 Command = 0x36 // PS_LED register // // Command = 0x46 // Command = 0x44 // Command = 0x76 // Command = 0x77 WriteByte(Slave_Addr, Register_Addr, Command) Pulse Freq = 60kHz, Peak Current =100mA Pulse Freq = 70kHz, Peak Current =100mA Pulse Freq = 70kHz, Peak Current = 50mA Pulse Freq = 100kHz, Peak Current = 100mA Pulse Freq = 100kHz, Peak Current = 125mA PS_PULSES Register // This controls the number of PS LED pulses emitted (Up to 32 pulses) // Default setting of the register is 0x08 (8 Pulses) Register_Addr = 0x02 Command = 0x08 // PS_PULSES register // // Command = 0x00 // Command = 0x04 // Command = 0x20 WriteByte(Slave_Addr, Register_Addr, Command) 8 pulses 0 (no light) 4 pulses 32 pulses PS_MEAS_RATE Register //This controls the PS Resolution and measurement rate. // Default setting of the register is 0x45 (PS Resolution = 8 bit, Measurement Rate = 100ms) Register_Addr = 0x03 Command = 0x45 // PS_MEAS_RATE register // Resolution = 8 bit, Meas Rate = 100ms // Command = 0x47 Resolution = 8 bit Meas Rate = 400ms // Command = 0x5D Resolution = 11 bit Meas Rate = 100ms WriteByte(Slave_Addr, Register_Addr, Command) 33/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 ALS_MEAS_RATE Register // This controls the ALS measurement resolution and measurement rate. // Default setting of the register is 0x22 (Resolution = 18 Bit, Measurement rate of 100ms) Register_Addr = 0x04 Command = 0x41 // ALS_MEAS_RATE register // Resolution = 16 bit, Meas Rate =50ms // Command =0x25 Resolution = 18 bit, Meas Rate =1000ms // Command =0x02 Resolution = 20 bit, Meas Rate =100ms WriteByte(Slave_Addr, Register_Addr, Command) ALS _GAIN Register // This controls the ALS Gain Range. // Default setting of the register is 0x01 (Gain Range = 3) Register_Addr = 0x05 Command = 0x00 // ALS_GAIN register // // Command =0x04 WriteByte(Slave_Addr, Register_Addr, Command) Gain = 1 Gain = 18 MAIN_STATUS Register (Read Only) // This Register contains the information on Interrupt, ALS and PS data status. Register_Addr = 0x07 // MAIN_STATUS register address Data = ReadByte(Slave_Addr, Register_Addr) Power_ON_Status = Data & 0x20 ALS_Interrupt_Status = Data & 0x10 ALS_Data_Status = Data & 0x08 PS_Logic_Signal_Status = Data & 0x04 PS_Interrupt_Status = Data & 0x02 PS_Data_Status = Data & 0x01 // If 0x20 Part went through power-up event // If 0x00 Normal // If 0x10 Interrupt triggered // If 0x00 Interrupt condition not fulfilled // If 0x08 ALS data is new // If 0x00 Old (previously read) Data // If 0x04 Object is near // If 0x00 Object is far // If 0x02 Interrupt triggered // If 0x00 Interrupt condition not fulfilled // If 0x01 PS data is new // If 0x00 Old (previously read) Data PS_DATA Registers (Read Only) //The register 0x08 contains PS ADC lower byte data. //The register 0x09 contains PS ADC 3 bits of upper byte data and PS Overflow flag //These registers should be read as a group, with the lower address being read first. Register_Addr = 0x08 // PS_DATA0 low byte address Data0=ReadByte(Slave_Addr, Register_Addr) // Data= PS ADC lower byte data Register_Addr = 0x09 // PS_DATA1 high byte address Data=ReadByte(Slave_Addr, Register_Addr) // Data= PS ADC high byte data Data1=Data&0x03 // Mask with 0x03 to extract data PS_ADC_Data = (Data1 << 8) | Data0 Overflow_status = Data & 0x08 // Shift and combine lower and upper bytes to give 11-bit PS data // If 0x08 PS Data is overflow // If 0x00 PS Data is valid 34/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 CLEAR_DATA Registers (Read Only) //The register 0x0A contains CLEAR_DATA ADC 0 lower byte data. //The register 0x0B contains CLEAR_DATA ADC 1 middle byte data. //The register 0x0C contains CLEAR_DATA ADC 2 upper byte data. //These registers should be read as a group, with the lower address being read first. Register_Addr = 0x0A // CLEAR_DATA_0 low byte address Data0=ReadByte(Slave_Addr, Register_Addr) Register_Addr = 0x0B // CLEAR_DATA_1 middle byte address Data1=ReadByte(Slave_Addr, Register_Addr) Register_Addr = 0x0C // CLEAR_DATA_2 upper byte address Data2=ReadByte(Slave_Addr, Register_Addr) CLEAR_Data =(Data2<<16)| (Data1 << 8) | Data0 // Shift and combine all register data to get CLEAR ADC Data ALS_DATA Registers (Read Only) // The register 0x0D contains ALS ADC lower byte data. // The register 0x0E contains ALS ADC 1 middle byte data. // The register 0x0F contains ALS ADC 2 upper byte data. // These registers should be read as a group, with the lower address being read first. Register_Addr = 0x0D // ALS_DATA_0 low byte address Data0=ReadByte(Slave_Addr, Register_Addr) Register_Addr = 0x0E // ALS_DATA_1 middle byte address Data1=ReadByte(Slave_Addr, Register_Addr) Register_Addr = 0x0F // ALS_DATA_2 upper byte address Data2=ReadByte(Slave_Addr, Register_Addr) ALS ADC_Data =(Data2<<16)| (Data1 << 8) | Data0 // Shift and combine all register data to get ALS ADC Data ALS_DATA_COMP Registers (Read Only) // The register 0x16 contains ALS_COMP ADC lower byte data. // The register 0x17 contains ALS_COMP ADC 1 middle byte data. // The register 0x18 contains ALS_COMP ADC 2 upper byte data. // These registers should be read as a group, with the lower address being read first. Register_Addr = 0x16 // ALS_DATA_COMP_0 low byte address Data0=ReadByte(Slave_Addr, Register_Addr) Register_Addr = 0x17 // ALS_DATA_COMP_1 middle byte address Data1=ReadByte(Slave_Addr, Register_Addr) Register_Addr = 0x18 // ALS_DATA_COMP_2 upper byte address Data2=ReadByte(Slave_Addr, Register_Addr) ALS_COMP_ADC_Data =(Data2<<16)| (Data1 << 8) | Data0 // Shift and combine all register data to get ALS_COMP ADC Data 35/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 INT_CFG Register //This register controls the operation of the interrupt pins and options to trigger interrupt for ALS and PS. //The default value for this INT_CFG register is 0x10 (Interrupts inactive for both ALS and PS) Register_Addr = 0x19 Command = 0x15 // INT_CFG Register address // Interrupt CH = ALS, ALS Interrupt Enable, Normal trigger mode; PS Interrupt Enable // Command = 0x17 Interrupt source CH = ALS, ALS Interrupt Enable, // PS Logic Output Mode; PS Interrupt Enable // Command = 0x05 Interrupt source CH = CLEAR, ALS Interrupt Enable, // Normal Trigger Mode; PS Interrupt Enable // Command = 0x14 Interrupt CH = ALS, ALS Interrupt Enable, // Normal Trigger Mode; PS Interrupt Disable // Command = 0x11 Interrupt CH = ALS, ALS Interrupt Disable, // Normal Trigger Mode; PS Interrupt Enable WriteByte(Slave_Addr, Register_Addr, Command) INTERRUPT_PERSIST Register // This register sets the ALS and PS persist level. // The default setting is 0x00. Interrupt at every ALS and PS reading outside set thresholds. Register_Addr = 0x1A Command = 0x00 // INT_PST register // Interrupt for every ALS and PS value outside threshold // Command =0x10 Subsequent 2 ALS and every PS value, outside threshold range // Command =0x11 Subsequent 2 ALS and 2 PS values, outside threshold range // Command =0x35 Subsequent 4 ALS and subsequent 6 PS values, outside threshold range WriteByte(Slave_Addr, Register_Addr, Command) PS_THRES Registers // The register 0x1B contains PS Interrupt upper threshold lower byte data (PS_THRES_UP_0) // The register 0x1C contains PS Interrupt upper threshold upper byte data (PS_THRES_UP_1) // The register 0x1D contains PS Interrupt lower threshold lower byte data (PS_THRES_LOW_0) // The register 0x1E contains PS Interrupt lower threshold upper byte data (PS_THREH_LOW_1) // To set PS Upper threshold for Interrupt Upper_Threshold_Value=1000 Data1 = Upper_Threshold_Value >> 8 Data0 = Upper_Threshold_Value & 0xFF Register_Addr = 0x1B WriteByte(Slave_Addr, Register_Addr, Data0) Register_Addr = 0x1C WriteByte(Slave_Addr, Register_Addr, Data1) // To set PS Lower threshold for Interrupt Lower_Threshold_Value=100 Data1 = Lower_Threshold_Value >> 8 Data0 =Lower_Threshold_Value & 0xFF Register_Addr = 0x1D WriteByte(Slave_Addr, Register_Addr, Data0) Register_Addr = 0x1E WriteByte(Slave_Addr, Register_Addr, Data1) // Example 1000 // Shift right to extract the upper byte // Mask to extract lower byte. // PS_THRES_UP_0 Register address // PS_THRES_UP_1 Register address // Example 100 // Shift right to extract the upper byte // Mask to extract lower byte. // PS_THRES_LOW_0 Register address // PS_THRES_LOW_1 Register address 36/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 PS_CAN Registers //The register 0x1F contains PS cancellation lower byte data (PS_CAN_0) //The register 0x20 contains 3 bits of PS cancellation upper byte data (PS_CAN_1) //To set PS Cancellation Value (0 to 2047) PS_Cancel_Value=100 Data1 = PS_Cancel_Value >> 8 Data0 = PS_Cancel_Value & 0xFF Register_Addr = 0x1F WriteByte(Slave_Addr, Register_Addr, Data0) Register_Addr = 0x20 WriteByte(Slave_Addr, Register_Addr, Data1) // Example 100 // Shift right to extract the upper byte // Mask to extract lower byte. // PS_CAN_0 Register address // PS_CAN_1 Register address ALS_THRES Registers //The register 0x21 contains ALS Interrupt upper threshold lower byte data (ALS_THRES_UP_0) //The register 0x22 contains ALS Interrupt upper threshold 1 upper byte data (ALS_THRES_UP_1) //The register 0x23 contains ALS Interrupt upper threshold 2 upper byte data (ALS_THRES_UP_2) //The register 0x24 contains ALS Interrupt lower threshold lower byte data (ALS_THRES_LOW_0) //The register 0x25 contains ALS Interrupt lower threshold 1 upper byte data (ALS_THRES_LOW_1) //The register 0x26 contains ALS Interrupt lower threshold 2 upper byte data (ALS_THRES_LOW_2) // To set ALS Upper threshold for Interrupt Upper_Threshold_Value=1000 Data2 = Upper_Threshold_Value >> 16 Data1 = Upper_Threshold_Value >> 8 Data0 = Upper_Threshold_Value & 0xFF Register_Addr = 0x21 WriteByte(Slave_Addr, Register_Addr, Data0) Register_Addr = 0x22 WriteByte(Slave_Addr, Register_Addr, Data1) Register_Addr = 0x23 WriteByte(Slave_Addr, Register_Addr, Data2) // To set ALS Lower threshold for Interrupt Lower_Threshold_Value=100 Data2 = Lower_Threshold_Value >> 16 Data1 = Lower_Threshold_Value >> 8 Data0 = Lower_Threshold_Value & 0xFF Register_Addr = 0x24 WriteByte(Slave_Addr, Register_Addr, Data0) Register_Addr = 0x25 WriteByte(Slave_Addr, Register_Addr, Data1) Register_Addr = 0x26 WriteByte(Slave_Addr, Register_Addr, Data2) // Example 1000 // Shift right to extract the 2 upper byte // Shift right to extract the 1 upper byte // Mask to extract lower byte. // ALS_THRES_UP_0 Register address // ALS_THRES_UP_1 Register address // ALS_THRES_UP_2 Register address // Example 100 // Shift right to extract the 2 upper byte // Shift right to extract the 1 upper byte // Mask to extract lower byte. // ALS_THRES_LOW_0 Register address // ALS_THRES_LOW_1 Register address // ALS_THRES_LOW_2 Register address 37/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 12. Recommended Leadfree Reflow Profile MAX 260C T - TEMPERATURE (°C) 255 R3 230 217 200 180 R2 R4 60 sec to 90 sec Above 217 C 150 R5 R1 120 80 25 0 P1 HEAT UP 100 50 150 P2 SOLDER PASTE DRY 200 P3 SOLDER REFLOW 250 P4 COOL DOWN 300 t-TIME (SECONDS) Process Zone Symbol ∆T Maximum ∆T/∆ ∆time or Duration Heat Up P1, R1 25°C to 150°C 3°C/s Solder Paste Dry P2, R2 150°C to 200°C 100s to 180s P3, R3 200°C to 260°C 3°C/s P3, R4 260°C to 200°C -6°C/s P4, R5 200°C to 25°C -6°C/s Time maintained above liquidus point , 217°C > 217°C 60s to 90s Peak Temperature 260°C - Time within 5°C of actual Peak Temperature > 255°C 20s Time 25°C to Peak Temperature 25°C to 260°C 8mins Solder Reflow Cool Down It is recommended to perform reflow soldering no more than twice. 38/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 13. Moisture Proof Packaging All LTR-579ALS-01 are shipped in moisture proof package. Once opened, moisture absorption begins. This part is compliant to JEDEC J-STD-033A Level 3. Time from Unsealing to Soldering After removal from the moisture barrier bag, the parts should be stored at the recommended storage conditions and soldered within seven days. When the moisture barrier bag is opened and the parts are exposed to the recommended storage conditions for more than seven days, the parts must be baked before reflow to prevent damage to the parts. Recommended Storage Conditions Storage Temperature 10°C to 30°C Relative Humidity Below 60% RH Baking Conditions Package Temperature Time In Reels 60°C 48 hours In Bulk 100°C 4 hours Baking should only be done once. 39/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 14. Recommended Land Pattern and Metal Stencil Aperture Stencil Apertur e Land Metal Stencil Pattern for Solder Paste Printing PCB Recommended Land Pattern Note: All dimensions are in millimeters 40/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 Recommended Metal Stencil Aperture It is recommended that the metal stencil used for solder paste printing has a thickness (t) of 0.11mm (0.004 inches / 4 mils) or 0.127mm (0.005 inches / 5 mils). The stencil aperture opening is recommended to be 0.72mm x 0.60mm which has the same dimension as the land pattern. This is to ensure adequate printed solder paste volume and yet no shorting. Aperture Opening t 3.6 2.00 41/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 15. Package Dimension for Tape and Reel Notes: 1. All dimensions are in millimeters 2. Empty component pockets sealed with top cover tape 3. 13 inch reel - 8000 pieces per reel 4. In accordance with ANSI/EIA 481-1-A-1994 specifications 42/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-579ALS-01 Revision Table: Version Update Page Date 1.0 Datasheet as created Total 42 15-APR-15 1.1 Added Lux Formula in page 28 Total 43 15-JUN-15 43/43 Part No. : LTR-579ALS-01 BNS-OD-FC002/A4