Fully Integrated Proximity and Ambient Light …

1 Semiconductors Rev. , 20-Mar-181 Document Number: 84177 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT Integrated Proximity and Ambient Light Sensor WithInfrared Emitter, I2C Interface, and Interrupt FunctionDESCRIPTIONThe VCNL4020X01 is a Fully Integrated Proximity and Ambient Light sensor. Fully Integrated means that the infrared emitter is included in the package. It has 16 bit resolution. It includes a signal processing IC and features standard I2C communication interface. It features an interrupt Proximity sensor for:-Mobile devices ( smart phones, touch phones, PDAs, GPS) for touch screen locking, power saving for presence detection Integrated Ambient Light function for display / keypad contrast control and dimming of mobile devices Rear view mirror dimming in automotive Proximity / optical switch for consumer, computing, automotive and industrial devices, and displays (like notebooks, tablet PCs, and automotive touch panels) Dimming control for consumer, computing, industrial, and automotive displaysFEATURES Package type: surface-mount Dimensions (L x W x H in mm): x x AEC-Q101 qualified Integrated modules: infrared emitter (IRED), Ambient Light sensor (ALS-PD), Proximity sensor (PD), and signal conditioning IC Interrupt function Supply voltage range VDD.

2 V to V Supply voltage range IR anode: V to 5 V Communication via I2C interface I2C bus H-level range: V to 5 V Floor life: 168 h, MSL 3, according to J-STD-020 Low stand by current consumption: A Material categorization: for definitions of compliance please see FUNCTION Built-in infrared emitter and photo-pin-diode for Proximity function 16 bit effective resolution for Proximity detection range ensures excellent cross talk immunity Programmable LED drive current from 10 mA to 200 mA in 10 mA steps Excellent Ambient Light suppression by signal modulation Proximity distance up to 200 mmAMBIENT Light FUNCTION Built-in Ambient Light photo-pin-diode with close-to- human-eye sensitivity 16 bit dynamic range from lx to 16 klx 100 Hz and 120 Hz flicker noise rejection Note(1)Adjustable through I2C interface7 nc6 nc9 GND8 GND10 IR cathodeIR anode 1 SDA 2 INT 3 SCL 4 VDD 522620 PRODUCT SUMMARYPART NUMBEROPERATING RANGE(mm)OPERATING VOLTAGE RANGE(V)I2C BUS VOLTAGE RANGE(V)LED PULSE CURRENT (1)(mA) Ambient Light RANGE(lx)

3 Ambient Light RESOLUTION(lx)OUTPUT CODEADC RESOLUTION Proximity / Ambient LIGHTVCNL4020X011 to to to 510 to to 16 bit, I2C16 bit / 16 Semiconductors Rev. , 20-Mar-182 Document Number: 84177 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT (1)MOQ: minimum order quantityORDERING INFORMATIONORDERING CODEPACKAGINGVOLUME (1)REMARKSVCNL4020X01-GS08 Tape and reelMOQ: 3300 mm x mm x mmVCNL4020X01-GS18 MOQ: 13 000 pcsABSOLUTE MAXIMUM RATINGS (Tamb = 25 C, unless otherwise specified)PARAMETERTEST temperature rangeTamb-40+105 CStorage temperature rangeTstg-40+105 CTotal power dissipationTamb 25 CPtot50mWJunction temperatureTj105 CBASIC CHARACTERISTICS (Tamb = 25 C, unless otherwise specified)PARAMETERTEST voltage voltage IR Bus H-level H-level range low voltage3 mA sink consumptionStandby current,no ACurrent consumptionproximity mode incl.

4 IRED (averaged)2 measurements per second, IRED current 20 mA5 A250 measurements per second, IRED current 20 mA520 A2 measurements per second, IRED current 200 mA35 A250 measurements per second, IRED current 200 mA4mACurrent consumption Ambient Light mode2 measurements per secondaveraging = A8 measurements per secondaveraging = 110 A2 measurements per secondaveraging = 64160 A8 measurements per secondaveraging = 64640 AAmbient Light resolutionDigital resolution (LSB count) Light outputEV = 100 lxaveraging = 64400countsI2C clock rate Semiconductors Rev. , 20-Mar-183 Document Number: 84177 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT BLOCK DIAGRAMNote nc must not be electrically connected Pads 6 and 7 are only considered as solder padsTEST CIRCUITBASIC CHARACTERISTICS (Tamb = 25 C, unless otherwise specified)Fig.

5 1 - Idle Current vs. Ambient TemperatureFig. 2 - Idle Current vs. VDDFig. 3 - Proximity Value vs. DistanceFig. 4 - Forward Current vs. Temperature2262110 IR cathode9 GND8 GND6 nc7 ncIR anode 1 SDA 2 INT 3 SCL 4 VDD 5 IREDVCNL4020 ASICAmbiPDProxiPDd = 20 mm Kodak gray card (18 % reflectivity)VCNL4020X01 IRED 30 mm x 30 - Supply Current Idle Mode ( A)Tamb - Ambient Temperature ( C) = VVDD = VVDD = VVDD = VVDD = VVDD = VVDD = - Supply Current Idle Mode ( A)VDD - Supply Voltage (V)100 C80 C55 C25 C-10 C-40 0001100100010 Value (cts)Distance to Reflecting Card (mm)200 mAMedia: Kodak gray card20 mA100 mA2600204060200150-50-25025125 IIRED - Forward Current IRED (mA)Tamb - Ambient Temperature ( C)20 mA40 mA60 mA80 mA100 mA120 mA140 mA160 mA180 mA200 mAVIRED = Semiconductors Rev. , 20-Mar-184 Document Number: 84177 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE.

6 THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT 5 - Relative Radiant Intensity vs. WavelengthFig. 6 - Relative Radiant Intensity vs. Angular DisplacementFig. 7 - Relative Spectral Sensitivity vs. Wavelength( Proximity Sensor)Fig. 8 - Relative Radiant Sensitivity vs. Angular Displacement( Proximity Sensor)Fig. 9 - Ambient Light Value vs. IlluminanceFig. 10 - Relative Spectral Sensitivity vs. Wavelength( Ambient Light Sensor) , rel - Relative Radiant Intensity - Wavelength (nm)22305IF = 100 mA0 20 40 60 80 - Relative Radiant Intensity22306 - Angular ( )rel - Relative Spectral Sensitivity - Wavelength (nm)223070 20 40 60 80 - Relative Sensitivity22308 - Angular Displacement100 0001100100010 00010 Ambient Light Signal (cts)EV - Illuminance (lx) ( )rel - Relative Spectral Sensitivity - Wavelength (nm)VCNL4020X01 Human Semiconductors Rev.

7 , 20-Mar-185 Document Number: 84177 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT 11 - Relative Radiant Sensitivity vs. Angular Displacement( Ambient Light Sensor)APPLICATION INFORMATIONVCNL4020X01 is a cost effective solution of Proximity and Ambient Light sensor with I2C bus interface. The standard serial digital interface is easy to access Proximity Signal and Light Intensity without complex calculation and programming by external controller. Beside the digital output also a flexible programmable interrupt pin is Application CircuitFig. 12 - Application Circuit(x) = Pin NumberNotes The interrupt pin is an open drain output. The needed pull-up resistor may be connected to the same supply voltage as the application controller and the pull-up resistors at SDA/SCL.

8 Proposed value R2 should be >1 k , 10 k to 100 k . Proposed value for R3 and R4, k to k , depend also on the I2C bus speed. For detailed description about set-up and use of the interrupt as well as more application related information see AN: Designing VCNL4020 into an Application . IR_Cathode needs no external connection. The needed connection to the driver is done 20 40 60 80 - Relative Sensitivity22311 VerticalHorizontal - Angular DisplacementHostMicro ControllerI2C Bus Clock SCLI2C Bus Data SDAINT (3)SCL (4)SDA (2)GND (8, 9)VDD (5)IR_Anode (1)C1C2C3C4R1100 n F100 n F10 F22 V to V to V to VR2 R3 Semiconductors Rev. , 20-Mar-186 Document Number: 84177 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT I2C InterfaceThe VCNL4020X01 contains seventeen 8 bit registers for operation control, parameter setup and result buffering.

9 All registers are accessible via I2C communication. Figure 13 shows the basic I2C communication with built in I2C interface is compatible with all I2C modes (standard, fast and high speed).I2C H-level range = V to 5 refer to the I2C specification from NXP for details. Fig. 13 - Send Byte/Receive Byte ProtocolDevice AddressThe VCNL4020X01 has a fix slave address for the host programming and accessing selection. The predefined 7 bit I2C bus address is set to 0010 011 = 13h. The least significant bit (LSB) defines read or write mode. Accordingly the bus address is set to 0010 011x = 26h for write, 27h for AddressesVCNL4020X01 has seventeen user accessible 8 bit registers. The register addresses are 80h (register #0) to 90h (register #16). REGISTER FUNCTIONSR egister #0 Command RegisterRegister address = 80h The register #0 is for starting Ambient Light or Proximity measurements.

10 This register contains 2 flag bits for data ready indication. Note With setting bit 3 and bit 4 at the same write command, a simultaneously measurement of Ambient Light and Proximity is done. Beside als_en and/or prox_en first selftimed_en needs to be set. On-demand measurement modes are disabled if selftimed_en bit is set. For the selftimed_en mode changes in reading rates (reg #4 and reg #2) can be made only when b0 (selftimed_en bit) = 0. For the als_od mode changes to the reg #4 can be made only when b4 (als_od bit) = 0; this is to avoid synchronization problems and undefined states between the clock domains. In effect this means that it is only reasonable to change rates while no selftimed conversion is addressRdReceive byte Read data from VCNL4020X01 ARegister addressAWrPSSlave addressPAAData byteSend byte Write command to VCNL4020X01S = start conditionP = stop conditionA = acknowledgeHost actionVCNL4020X01 responseSSlave addressARegister addressAWrPData byteATABLE 1 - COMMAND REGISTER #0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0config_lockals_data_rdyprox_data_rdyals _odprox_odals_enprox_enselftimed_enDescr iptionconfig_lockRead only bit.