Optical Sensor Product Data Sheet LTR-329ALS-01 Spec No.: DS86-2014-0006 Effective Date: 09/04/2014 Revision: B 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-329ALS-01 1. Description The LTR-329ALS-01 is a low voltage I2C digital light sensor [ALS] in a low cost miniature chipled lead-free surface mount package. This sensor converts light intensity to a digital output signal capable of direct I 2C interface. It provides a linear response over a wide dynamic range from 0.01 lux to 64k lux and is well suited to applications under high ambient brightness. There are altogether six gain settings (1X, 2X, 4X, 8X, 48X and 96X) available for user to configure. 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 (Fast Mode @ 400kbit/s) Ultra-small ChipLED package Built-in temperature compensation circuit Low active power consumption with standby mode Supply voltage range from 2.4V to 3.6V capable of 1.7V logic voltage Operating temperature range from -30 C to +70 C RoHS and Halogen free compliant Light Sensor Close to human eye spectral response Immunity to IR / UV Light Source Automatically rejects 50 / 60 Hz lightings flicker 6 dynamic range from 0.01 lux to 64k lux 16-bit effective resolution 3. Applications To control display backlight in Mobile Devices: Mobile phone, PDA Computing Devices: Notebook PC, Desktop Monitor Consumer Devices: LCD/PDP TV backlight systems, Cameras, Personal Navigation Device, Digital Photo Frame Dashboard 1/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 4. Ordering Information Part Number Packaging Type Package Quantity LTR-329ALS-01 Tape and Reel 4-pins chipled package 2500 5. Outline Dimensions Notes : 1. All dimensions are in millimeters. 2/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 6. Functional Block Diagram 7. Application Circuit 3/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 I/O Pins Configuration Table Pin I/O Type Symbol Description 1 VDD Power Supply Voltage 2 GND Ground 3 I/O SDA I2C serial data. This pin is an open drain input / output. 4 I SCL I2C serial clock. This pin is an open drain input. Recommended Application Circuit Components Component Recommended Value Rp1, Rp2, Rp3 [1] 1 k to 10 k C1, C2 1uF 4/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 8. Ratings and Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Rating Unit 3.8 V Supply Voltage VDD Digital Voltage Range SCL, SDA, INT -0.5 to 3.8 V Digital Output Current SCL, SDA, INT -1 to 20 mA Storage Temperature Tstg -40 to 100 C 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 Supply Voltage VDD LED Supply Voltage Min. Typ. Max. Unit 2.4 3.6 V VLED 2.5 4.35 V Interface Bus Power Supply Voltage VIO 1.7 3.6 V Operating Temperature Tope -30 70 C Electrical & Optical Specifications All specifications are at VDD = 3.0V, Tope = 25C, unless otherwise noted. Parameter Min. Typ. Active Supply Current Standby Current Initial Startup Time Wakeup Time from Standby 60 100 Max. Unit Condition 250 uA Active Mode, Tope = 25C 5 uA Standby / Sleep Mode 1000 ms (Note 1) 10 ms (Note 1) 5/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 Light Sensor Parameter Min. Max. Unit Condition 65535 count Full Scale ADC Count 0 6 count Ch0, Lux = 0 0 6 count Ch1, Lux = 0 830 1550 count 3250 6100 count Full Scale ADC Count Typ. Dark ADC Count Ch0, Lux = 200 (White LED) Ch1, Lux = 200 (White LED) ADC Count (Gain=96) Integration Time : 50ms Measurement Time : 100ms Ratio = Ch1/(Ch1 + Ch0), ALS Ratio 0.15 0.35 Ratio Lux = 200 (White LED) Typical Performance Curve All specifications are at VDD = 3.0V, Tope = 25C, unless otherwise noted. Figure 1: Normalized Spectral Response 6/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 Figure 2 : Viewing angle Figure 3 : Vdd versus Average Idd 7/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 Figure 4 : Average Idd versus temperature Figure 5 : Output count ratio versus temperature 8/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 Lux Formula Refer to Appendix A for the lux formula Notes: 1. Startup Sequence Supply VDD to Sensor (Sensor in Standby Mode) Wait 100 ms (min) - initial startup time I2C Command (Write) To enable sensor to Active Mode Wait 10 ms (max) - wakeup time from standby Sensor is Active and starts measurement 9/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 AC Electrical Characteristics All specifications are at VBus = 1.8V, Tope = 25C, unless otherwise noted. Parameter Symbol f SCL SCL clock frequency Bus free time between a STOP and START condition t BUF Hold time (repeated) START condition. After this period, the first clock pulse is generated t HD LOW period of the SCL clock Min. 1 Max. Unit 400 kHz 1.3 us 0.6 us 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 t 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 ; STA f 0 ns 50 ns 2 Definition of timing for I C bus 10/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 9. Principles of Operation 2 I C Protocols I2C Write Protocol (type 1): 1 7 1 1 8 1 1 S Slave address W A Register Address A P 1 8 Slave ID (Write) Slave ID (Write) 1 2 3 4 5 6 7 S 6 S 5 S 4 S 3 S 2 S 1 S 0 8 9 2 3 4 5 6 7 9 SCL SDA S Slave address A A A A A A A A 7 6 5 4 3 2 1 0 W A Register Address A P 2 I C Write Protocol (type 2): 1 7 1 1 8 1 S Slave address W A Register Address 8 1 1 A Register Command A P Slave ID (Write) Slave ID (Write) 1 2 3 4 5 6 7 S 6 S 5 S 4 S 3 S 2 S 1 S 0 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 SCL SDA S Slave address A A A A A A A A 7 6 5 4 3 2 1 0 W A Register Address A A A A A A A A 7 6 5 4 3 2 1 0 A Register Command A P 2 I C Read Protocol: 1 7 1 S Slave address R 1 8 1 1 A Register Command N P Slave ID (Read) 11/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 Slave ID (Read) 1 2 3 4 5 6 7 8 S 6 S 5 S 4 S 3 S 2 S 1 S 0 9 1 2 3 4 5 6 7 8 9 SCL SDA S Slave address C C C C C C C C 7 6 5 4 3 2 1 0 R A Register Command N P 2 I C Read (Combined format) Protocol: 1 7 1 1 8 1 S Slave address W A Register Address 1 7 A Sr Slave address Slave ID (Write) 1 1 2 3 4 1 1 R A Register Command N P Slave ID (Read) Slave ID (Write) 1 8 5 6 Slave ID (Read) 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 ...... SCL S 6 SDA S S 5 S 4 S 3 S 2 Slave address S 1 S 0 A A A A A A A A 7 6 5 4 3 2 1 0 W A Register Address S 6 A Sr S 5 S 4 S 3 S 2 S 1 S 0 Slave address 1 2 3 4 5 6 ...... R A 7 8 9 ...... C C C C C C C C 7 6 5 4 3 2 1 0 ...... A Register Command N 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 P Master-to-Slave 2 I C Slave Address The 7 bits slave address for this sensor is 0x29H. A read/write bit should be appended to the slave address by the master device to properly communicate with the sensor. 12/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 I2C Slave Address (0x29H) W/R Command Type Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Write 0 1 0 1 0 0 1 0 0x52H Read 0 1 0 1 0 0 1 1 0x53H value Register Set Addr R/W Register Name Description Reset Value 0x80 R/W ALS_CONTR ALS operation mode control SW reset 0x00 0x85 R/W ALS_MEAS_RATE ALS measurement rate in active mode 0x03 0x86 R PART_ID Part Number ID and Revision ID 0xA0 0x87 R MANUFAC_ID Manufacturer ID 0x05 0x88 R ALS_DATA_CH1_0 ALS measurement CH1 data, lower byte 0x00 0x89 R ALS_DATA_CH1_1 ALS measurement CH1 data, upper byte 0x00 0x8A R ALS_DATA_CH0_0 ALS measurement CH0 data, lower byte 0x00 0x8B R ALS_DATA_CH0_1 ALS measurement CH0 data, upper byte 0x00 0x8C R ALS_STATUS ALS new data status 0x00 Notes: 1) When reading ALS data registers, read sequence should always be from lower address to higher address (E.g. For ALS data, Ch1 data should be read first followed by Ch0 data. Read sequence should be 0x88, 0x89, 0x8A, 0x8B. When 0x8B is read, all four ALS data registers will be populated with new set of data). 13/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 ALS_CONTR Register (0x80) The ALS_CONTR register controls the ALS Gain setting, ALS operation modes and software (SW) reset for the sensor. The ALS sensor can be set to either standby mode or active mode. At either of these modes, the I 2C circuitry is always active. The default mode after power up is standby mode. During standby mode, there is no ALS measurement performed but I 2C communication is allowed to enable read/write to all the registers 0x80 ALS_CONTR (default = 0x00) B7 B6 B5 B4 B3 Reserved ALS Gain Field Bits Default Type Reserved 7:5 000 -- ALS Gain 4:2 000 1 0 B1 B0 SW Reset ALS Mode Description -- -- 000 Gain 1X 1 lux to 64k lux (default) 001 Gain 2X 0.5 lux to 32k lux 010 Gain 4X 0.25 lux to 16k lux 011 Gain 8X 0.125 lux to 8k lux 100 Reserved 101 Reserved 110 Gain 48X 0.02 lux to 1.3k lux 111 Gain 96X 0.01 lux to 600 lux RW 0 SW reset B2 RW Initial start-up procedure is NOT started (default) Initial start-up procedure is started, bit has default value 1 of 0 after start-up ALS mode 0 0 0 Stand-by mode (default) 1 Active mode RW 14/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 ALS_MEAS_RATE Register (0x85) The ALS_MEAS_RATE register controls the integration time and timing of the periodic measurement of the ALS in active mode. ALS Measurement Repeat Rate is the interval between ALS_DATA registers update. ALS Integration Time is the measurement time for each ALS cycle. ALS Integration Time must be set to be equal or smaller than the ALS Measurement Repeat Rate. If ALS Integration Time is set to be bigger than ALS Measurement Repeat Rate, it will be automatically reset to be equal to ALS Measurement Repeat Rate by the IC internally. 0x85 ALS_MEAS_RATE (default = 0x03) B7 B6 B5 Reserved B4 B3 ALS Integration Time Field Bits Default Type Reserved 7:6 00 -- B2 B1 B0 ALS Measurement Repeat Rate Description -- -- 000 100ms (default) 001 50ms 010 200ms 011 400ms 100 150ms 101 250ms 110 300ms 111 350ms 000 50ms 001 100ms 010 200ms 011 500ms (default) 100 1000ms ALS integration 5:3 000 RW time ALS measurement 2:0 011 RW rate 101 110 2000ms 111 15/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 PART_ID Register (0x86) (Read Only) The PART_ID register defines the part number and revision identification of the sensor. 0x86 PART_ID (default = 0x92) B7 B6 B5 B4 B3 Part Number ID B2 B1 B0 Revision ID Field Bits Default Type Description Part Number ID 7:4 1010 R Part ID 0x0AH Revision ID 3:0 0000 R Revision ID 0x00H MANUFAC_ID Register (0x87) (Read Only) The MANUFAC_ID register defines the manufacturer identification of the sensor. 0x87 MANUFAC_ID (default = 0x05) B7 B6 B5 B4 B3 B2 B1 B0 Manufacturer ID Field Bits Default Type Manufacturer ID 7:0 00000101 R Description Manufacturer ID (0x05H) 16/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 ALS_DATA_CH1 Register (0x88 / 0x89) (Read Only) The ALS_DATA registers should be read as a group, with the lower address read back first (i.e. read 0x88 first, then read 2 0x89). These two registers should also be read before reading channel-0 data (from registers 0x8A, 0x8B). When the I C 2 read operation starts, all four ALS data registers are locked until the I C read operation of register 0x8B is completed. This will ensure that the data in the registers is from the same measurement even if an additional integration cycle ends during the read operation. New measurement data is stored into temporary registers and the ALS_DATA registers are updated as 2 soon as there is no on-going I C read operation. The ALS ADC channel-1 data is expressed as a 16-bit data spread over two registers. The ALS_DATA_CH1_0 and ALS_DATA_CH1_1 registers provide the lower and upper byte respectively. 0x88 ALS_DATA_CH1_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 ALS Data Ch1 Low 0x89 ALS_DATA_CH1_1 (default = 0x00) B7 B6 B5 B4 B3 ALS Data Ch1 High Field Address Bits Default Type Description ALS Data Ch1 Low 0x88 7:0 00000000 R ALS ADC channel 1 lower byte data ALS Data Ch1 High 0x89 7:0 00000000 R ALS ADC channel 1 upper byte data 17/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 ALS_DATA_CH0 Register (0x8A / 0x8B) (Read Only) These two registers should be read after reading channel-1 data (from registers 0x88, 0x89). Lower address register should be read first (i.e read 0x8A first, then read 0x8B). See ALS_DATA_CH1 register information above. The ALS ADC channel-0 data is expressed as a 16-bit data spread over two registers. The ALS_DATA_CH0_0 and ALS_DATA_CH0_1 registers provide the lower and upper byte respectively. 0x8A ALS_DATA_CH0_0 (default = 0x00) B7 B6 B5 B4 B3 B2 B1 B0 B2 B1 B0 ALS Data Ch0 Low 0x8B ALS_DATA_CH0_1 (default = 0x00) B7 B6 B5 B4 B3 ALS Data Ch0 High Field Address Bits Default Type Description ALS Data Ch0 Low 0x8A 7:0 00000000 R ALS ADC channel 0 lower byte data ALS Data Ch0 High 0x8B 7:0 00000000 R ALS ADC channel 0 upper byte data ALS_ STATUS Register (0x8C) (Read Only) The ALS_STATUS register stores the information about ALS data status. New data means data has not been read yet. When the measurement is completed and data is written to the data register, the data status bit will be set to logic 1. When the data register is read, the data status bit will be set to logic 0. 18/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 0x8C ALS_PS_STATUS (default = 0x00) B7 B6 ALS Data Valid B5 ALS Gain Field Bits Default Type ALS Data Valid 7 0 R ALS Data Gain 6:4 000 3 0 R 2 0 R ALS data status Reserved 1:0 00 B3 B2 ALS Interrupt Status ALS Data Status B1 B0 Reserved Description 0 ALS Data is Valid (default) 1 ALS Data is Invalid 000 ALS measured data in Gain 1X (default) 001 ALS measured data in Gain 2X 010 ALS measured data in Gain 4X 011 ALS measured data in Gain 8X 100 Invalid 101 Invalid 110 ALS measured data in Gain 48X 111 ALS measured data in Gain 96X R Range Reserved B4 R 0 Don't care 0 OLD data (data already read), (default) 1 NEW data (first time data is being read) -- Don't care 19/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 10. Device Operation(using Interrupt) Below flow diagram illustrates the LTR-329ALS operation. 20/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 11. Pseudo Codes Examples Control Registers // The Control Register defines the operating modes and gain settings of the ALS of LTR-329. // Default settings is 0x00 (in Standby mode). Slave_Addr = 0x29 // Enable ALS Register_Addr = 0x80 Command = 0x01 // Slave address of LTR-329 device // ALS_CONTR register // For Gain X1 // For Gain X96, Command = 0x1D WriteByte(Slave_Addr, Register_Addr, Command) ALS Measurement Rate // The ALS_MEAS_RATE register controls the ALS integration time and measurement rate. // Default setting of the register is 0x03 (integration time 100ms, repeat rate 500ms) Slave_Addr = 0x29 // Slave address of LTR-329 device // Set ALS Integration Time 200ms, Repeat Rate 200ms Register_Addr = 0x85 // ALS_MEAS_RATE register Command = 0x12 // Int time = 200ms, Meas rate = 200ms // For Int time = 400ms, Meas rate = 500ms, Command = 0x1B WriteByte(Slave_Addr, Register_Addr, Command) ALS Data Registers (Read Only) // The ALS Data Registers contain the ADC output data for the respective channel. // These registers should be read as a group, with the lower address being read first. Slave_Addr = 0x29 // Read back ALS_DATA_CH1 Register_Addr = 0x88 ReadByte(Slave_Addr, Register_Addr, Data0) Register_Addr = 0x89 ReadByte(Slave_Addr, Register_Addr, Data1) // Read back ALS_DATA_CH0 Register_Addr = 0x8A ReadByte(Slave_Addr, Register_Addr, Data2) Register_Addr = 0x8B ReadByte(Slave_Addr, Register_Addr, Data3) ALS_CH1_ADC_Data = (Data1 << 8) | Data0 ALS_CH0_ADC_Data = (Data3 << 8) | Data2 // Slave address of LTR-329 device // ALS_DATA_CH1 low byte address // ALS_DATA_CH1 high byte address // ALS_DATA_CH0 low byte address // ALS_DATA_CH0 high byte address // Combining lower and upper bytes to give 16-bit Ch1 data // Combining lower and upper bytes to give 16-bit Ch0 data 21/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 ALS Status Register (Read only) // The ALS_STATUS Register contains the information on ALS data availability status. // This register is read only. Slave_Addr = 0x29 // Slave address of LTR-329 device // Read back Register Register_Addr = 0x8C ReadByte(Slave_Addr, Register_Addr, Data) // ALS_STATUS register address NewData_Status = Data & 0x04 // NewData_Status = 4(decimal) ALS New Data // ALS_Data_Valid = 0x00 ALS New Data is valid (usable) // ALS_Data_Valid = 0x80 ALS New Data is invalid, discard and wait for new ALS data 22/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-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 50 150 200 P2 SOLDER PASTE DRY 250 P4 COOL DOWN P3 SOLDER REFLOW 300 t-TIME (SECONDS) Process Zone Symbol T Maximum T/time or Duration Heat Up P1, R1 25C to 150C 3C/s Solder Paste Dry P2, R2 150C to 200C 100s to 180s P3, R3 200C to 260C 3C/s P3, R4 260C to 200C -6C/s P4, R5 200C to 25C -6C/s Time maintained above liquidus point , 217C > 217C 60s to 90s Peak Temperature 260C - Time within 5C of actual Peak Temperature > 255C 20s Time 25C to Peak Temperature 25C to 260C 8mins Solder Reflow Cool Down It is recommended to perform reflow soldering no more than twice. 23/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 13. Moisture Proof Packaging All LTR-329ALS-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 10C to 30C Relative Humidity Below 60% RH Baking Conditions Package Temperature Time In Reels 60C 48 hours In Bulk 100C 4 hours Baking should only be done once. 24/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 14. Recommended Land Pattern and Metal Stencil Aperture Recommended Land Pattern 25/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-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. Note: 1. All dimensions are in millimeters 26/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4 Optical Sensor LTR-329ALS-01 15. Package Dimension for Tape and Reel Notes: 1. All dimensions are in millimeters (inches) 2. Empty component pockets sealed with top cover tape 3. 7 inch reel - 2500 pieces per reel 4. In accordance with ANSI/EIA 481-1-A-1994 specifications. 27/27 Part No. : LTR-329ALS-01 BNS-OD-FC002/A4