PDF MLX75030 Data sheet ( Hoja de datos )

Número de pieza	MLX75030
Descripción	Universal Active Light Sensor Interface
Fabricantes	Melexis
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MLX75030 Universal Active Light Sensor Interface Features & Benefits  Two independent simultaneously operating active light measurement channels  Integrated DC light cancellation circuitry for active light channel DC light suppression  Two logarithmic ambient light channels  High input capacitance tolerant input current terminals  Extremely high degree of adaptability for different optical systems  Stand-by and sleep modes  Integrated 16Bit ADC  Integrated temperature sensor  Easy digital communication interface via SPI  Integrated watchdog timer  High safety design by comprehensive diagnostic and monitoring functions  Minimum amount of external components  Small-size SMD package QFN24 4x4 mm Ordering Information Part No. MLX75030 MLX75030 Temperature Code R (-40°C to 105°C) C (0°C to 70°C) Package Code LQ (QFN24 4x4) LQ (QFN24 4x4) Option code B B Application Examples  Optical proximity sensing & display dimming  Touch-less gesture recognition, Driver/passenger discrimination Pin Description – Top View General Description The MLX75030 Universal Active Light Sensor Interface was designed to allow easy and robust dual-channel optical reflection and dual channel ambient light measurement. Therefore it is ideally suited for the design of responsive human-machine interfaces (HMI) that require proximity or gesture detection in environments subject to wide background light level variations, possibly in combination with display dimming. The MLX75030 IC consists of two optical sensor interface parts. Part one is optimized for active light measurements and is designed to control up to 2 external LEDs and to sense modulated light current from up to 2 external photodiodes on independent channels A and B. The active light detection is virtually independent from background light by means of integrated hardware-level ambient light suppression. Part two consists of two logarithmic current sensors C and D, which can measure the photocurrent of externally connected photodiodes. Simple and programmable operation is ensured by internal control logic, configurable user registers and SPI communication. _____75030 Rev 003 Page 1 of 58 Dec/12 Datasheet 1 page MLX75030 Universal Active Light Sensor Interface Table of Contents Functional Block Diagram ......................................................................................................................................................................... 2 1 General Description ............................................................................................................................................................................... 3 2 Glossary of Terms ................................................................................................................................................................................. 6 3 Absolute Maximum Ratings ................................................................................................................................................................... 7 4 Pin Definitions & Descriptions ................................................................................................................................................................ 7 5 General Electrical Specifications.......................................................................................................................................................... 10 6 Sensor Specific Specifications ............................................................................................................................................................. 11 7 Detailed General Description ............................................................................................................................................................... 15 7.1 Analog Sensor Functions ............................................................................................................................................................. 15 7.1.1 Active Light Sensor ............................................................................................................................................................... 15 7.1.1.1 Active Light Channel DC Light Measurement................................................................................................................. 15 7.1.2 Ambient Light Sensor............................................................................................................................................................ 15 7.1.2.1 Normal Operation .......................................................................................................................................................... 15 7.1.2.2 Diagnostics Mode Operation.......................................................................................................................................... 16 7.1.3 Temperature Sensor ............................................................................................................................................................. 16 7.1.4 DAC ...................................................................................................................................................................................... 16 7.1.5 LED Driver ............................................................................................................................................................................ 17 7.2 SPI ............................................................................................................................................................................................... 17 7.2.1 General Description of SPI Interface ..................................................................................................................................... 17 7.2.2 Detailed Explanation of SPI Instruction Words ...................................................................................................................... 21 7.2.2.1 NOP – Idle Command.................................................................................................................................................... 21 7.2.2.2 CR – Chip Reset Command........................................................................................................................................... 21 7.2.2.3 RSLP/CSLP – Request Sleep/Confirm Sleep................................................................................................................. 21 7.2.2.4 RSTBY/CSTBY - Request Standby/Confirm Standby .................................................................................................... 22 7.2.2.5 NRM – Normal Running Mode ....................................................................................................................................... 22 7.2.2.6 SM – Start Measurement ............................................................................................................................................... 22 7.2.2.7 RO – Start Read-Out ..................................................................................................................................................... 24 7.2.2.8 SM+RO - Start Measurement combined with Read-Out................................................................................................. 27 7.2.2.9 WR/RR – Write/Read Register....................................................................................................................................... 28 7.2.2.10 SD – Start Diagnostics................................................................................................................................................. 29 7.3 Internal Status Flags .................................................................................................................................................................... 31 7.4 User Registers Overview .............................................................................................................................................................. 33 7.4.1 SetAna register ..................................................................................................................................................................... 34 7.4.2 SetAH register....................................................................................................................................................................... 35 7.4.3 SetAL register ....................................................................................................................................................................... 35 7.4.4 SetBH register....................................................................................................................................................................... 36 7.4.5 SetBL register ....................................................................................................................................................................... 36 7.4.6 SetPF register....................................................................................................................................................................... 37 7.4.7 Err register ............................................................................................................................................................................ 38 7.4.8 Rst register ........................................................................................................................................................................... 39 7.4.9 GainBuf register .................................................................................................................................................................... 40 7.4.10 Calib1/Calib2 register.......................................................................................................................................................... 41 7.4.11 EnChan register .................................................................................................................................................................. 45 7.4.12 Tamb register...................................................................................................................................................................... 46 7.5 Window Watchdog Timer ............................................................................................................................................................. 47 7.6 Reset Behaviour........................................................................................................................................................................... 49 7.7 Wake-up from Sleep or Standby................................................................................................................................................... 50 7.8 CRC Calculation........................................................................................................................................................................... 51 7.9 Global Timing Diagrams ............................................................................................................................................................... 52 8 Performance Graphs ........................................................................................................................................................................... 53 8.1 LED Channel DC Measurement ................................................................................................................................................... 53 8.2 Temperature Sensor Characteristics ............................................................................................................................................ 53 8.3 Ambient Light Channel C.............................................................................................................................................................. 53 8.4 Ambient Light Channel D.............................................................................................................................................................. 53 9 Application Information ........................................................................................................................................................................ 54 9.1 Application circuit for typ. active light channel and two ambient channels ..................................................................................... 54 10 Application Comments ....................................................................................................................................................................... 55 11 Standard information regarding manufacturability of Melexis products with different soldering processes .......................................... 56 12 ESD Precautions ............................................................................................................................................................................... 57 13 Package Information.......................................................................................................................................................................... 57 14 Disclaimer.......................................................................................................................................................................................... 58 _____75030 Rev 003 Page 5 of 58 Dec/12 Datasheet 5 Page MLX75030 Universal Active Light Sensor Interface 6 Sensor Specific Specifications DC Operating Parameters TA = -40°C to 105°C, TA = 0°C to 70°C (C version), VDD = 3.0V to 3.6V (unless otherwise specified) Active Light Channels (Detectors A & B) Parameter Symbol Test Conditions Min Typ Max Units Active light signal optical transfer ratio OTR I LED I PDAB 30 80000 dc sunlight signal ISun 140 900 uA fast full scale transition at Isunmax tsunrise 3.5 ms min. relative active light modulation (referred to received IR signal) I PDAB _ min I PDAB - 400Hz BW, - max LED current of 1000mA - 25°C - dc sun constant - Active light response per channel 2.5ms 0.3 % Error condition Err6 Critical error detected on TIA output, is TIA output outside 1.1V+/- (0.65 … 0.75V) Note: Critical error may occur if the referring active light Channel is disabled and the according diagnostic function is enabled (see EnChan register). Critical error may occur after enabling of the referring active light Channel due to analog settling time. Table 4 : Active light sensor channels specifications _____75030 Rev 003 Page 11 of 58 Dec/12 Datasheet 11 Page

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