Fully Integrated Proximity Sensor With Infrared Emitter, I ...

1 Semiconductors Rev. , 20-Mar-181 Document Number: 84150 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 Sensor With Infrared Emitter, I2C Interface, and Interrupt FunctionDESCRIPTIONThe VCNL3020 is a Fully Integrated Proximity 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, PDA, GPS) for touch screen locking, power saving, etc. Proximity / optical switch for consumer, computing and industrial devices and displaysFEATURES Package type: surface-mount Dimensions (L x W x H in mm): x x Integrated modules: Infrared emitter (IRED), Proximity Sensor (PD), and signal conditioning IC Interrupt function Supply voltage range VDD: 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: 72 h, MSL 4, according to J-STD-020 Low stand by current consumption: A Material categorization.

2 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 mm Note(1)Adjustable through I2C interfaceNote(1)MOQ: minimum order quantity7 nc6 nc9 GND8 GND10 IR cathodeIR anode 1 SDA 2 INT 3 SCL 4 VDD 5 PRODUCT SUMMARYPART NUMBEROPERATING RANGE(mm)OPERATINGVOLTAGE RANGE(V)I2C BUSVOLTAGE RANGE(V)LED PULSECURRENT (1)(mA)OUTPUT CODEADC RESOLUTION Proximity / AMBIENT LIGHT VCNL30201 to to to 510 to 20016 bit, I2C16 bit / -ORDERING INFORMATIONORDERING CODEPACKAGINGVOLUME (1)REMARKSVCNL3020-GS08 Tape and reelMOQ: 3300 mm x mm x mmVCNL3020-GS18 MOQ: 13 300 Semiconductors Rev.

3 , 20-Mar-182 Document Number: 84150 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 CIRCUITABSOLUTE MAXIMUM RATINGS (Tamb = 25 C, unless otherwise specified)PARAMETERTEST temperature rangeTamb-25+85 CStorage temperature rangeTstg-25+85 CTotal power dissipationTamb 25 CPtot50mWJunction temperatureTj100 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. 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 mA4mAI2C clock rate rangefSCL3400kHzVCNL 3020 ASIC12345 VDDIR AnodeSDASCLINT610987IR Cathode GNDncncGNDIREDP roxi PDd = 20 mm Kodak gray card (18 % reflectivity)VCNL3020 IRED 30 mm x 30 Semiconductors Rev.

4 , 20-Mar-183 Document Number: 84150 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 CHARACTERISTICS (Tamb = 25 C, unless otherwise specified)Fig. 1 - Idle Current vs. Ambient TemperatureFig. 2 - Idle Current vs. VDDFig. 3 - Proximity Value vs. DistanceFig. 4 - Forward Current vs. TemperatureFig. 5 - Relative Radiant Intensity vs. WavelengthFig. 6 - Relative Radiant Intensity vs. Angular 50- 30105090- 103070 IDD - Supply Current Idle Mode ( A)Tamb - Ambient Temperature ( C)22301 VDD = VVDD = VVDD = VVDD = VVDD = VVDD = VVDD = - Supply Current Idle Mode ( A)VDD - Supply Voltage (V)22302100 C80 C55 C25 C-10 C-40 C100 0001100100010 Value (cts)Distance to Reflecting Card (mm)LED current 200 mAMedia: Kodak gray cardMod.

5 Frequency = 390 kHzLED current 100 mALED current 20 mA250050100150200140-60-202060100 IIRED - Forward Current IRED (mA)Tamb - Ambient Temperature ( C)2230420 mA40 mA60 mA80 mA100 mA120 mA140 mA160 mA180 mA200 mAVIRED = , rel - Relative Radiant Intensity - Wavelength (nm)22305IF = 100 mA0 20 40 60 80 - Relative Radiant Intensity22306 - Angular Semiconductors Rev. , 20-Mar-184 Document Number: 84150 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 7 - Relative Spectral Sensitivity vs. Wavelength( Proximity Sensor )Fig. 8 - Relative Radiant Sensitivity vs. Angular Displacement( Proximity Sensor )APPLICATION INFORMATIONVCNL3020 is a cost effective solution of Proximity Sensor with I2C bus interface.

6 The standard serial digital interface is easy to access Proximity Signal without complex calculation and programming by external controller. Beside the digital output also a flexible programmable interrupt pin is Application CircuitFig. 9 - 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. 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 VCNL3020 into an Application . IR_Cathode needs no external connection. The needed connection to the driver is done ( )rel - Relative Spectral Sensitivity - Wavelength (nm)223070 20 40 60 80 - Relative Sensitivity22308 - Angular Displacement22312-4 HostMicro ControllerI2C Bus Clock SCLI2C Bus Data SDAVCNL3020 INT (3)SCL (4)SDA (2)GND (8, 9)VDD (5)IR_An o d e (1)C1C2C3C4R1100 n F100 n F10 F22 V to V to V to VR2 R3 Semiconductors Rev.

7 , 20-Mar-185 Document Number: 84150 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 VCNL3020 contains seventeen 8 bit registers for operation control, parameter setup and result buffering. 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. 10 - Send Byte/Receive Byte ProtocolDevice AddressThe VCNL3020 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.

8 The least significant bit (LSB) defines read or write mode. Accordingly the bus address is set to 0010 011x = 26h for write, 27h for AddressesVCNL3020 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 Proximity measurements. This register contains a flag bit for data ready indication. Note Beside prox_en first selftimed_en needs to be set. On-demand measurement mode is disabled if selftimed_en bit is set. For the selftimed_en mode changes in reading rates (reg #2) can be made only when b0 (selftimed_en bit) = addressRdReceive byte Read data from VCNL3020 ARegister addressAWrPSSlave addressPAAData byteSend byte Write command to VCNL3020S = start conditionP = stop conditionA = acknowledgeHost actionVCNL3020 responseSSlave addressARegister addressAWrPData byteA22313-3 TABLE 1 - COMMAND REGISTER #0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0config_lockn/aprox_data_rdyn/aprox_odn/ aprox_enselftimed_enDescriptionconfig_lo ckRead only bit.

9 Value = 1 prox_data_rdyRead only bit. Value = 1 when Proximity measurement data is available in the result registers. This bit will be reset when one of the corresponding result registers (reg #7, reg #8) is bit. Starts a single on-demand measurement for is available at the end of conversion for reading in the registers #7(HB) and #8(LB).prox_enR/W bit. Enables periodic Proximity measurementselftimed_enR/W bit. Enables state machine and LP oscillator for self timed measurements; no measurement is performed until the corresponding bit is Semiconductors Rev. , 20-Mar-186 Document Number: 84150 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 Product ID Revision RegisterRegister address = 81h.

10 This register contains information about product ID and product data value of current revision = #2 Rate of Proximity MeasurementRegister address = If self_timed measurement is running, any new value written in this register will not be taken over until the mode is actualy #3 LED Current Setting for Proximity ModeRegister address = 83h. This register is to set the LED current value for Proximity value is adjustable in steps of 10 mA from 0 mA to 200 register also contains information about the used device fuse program 2 - PRODUCT ID REVISION REGISTER #1 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Product IDRevision IDDescriptionProduct IDRead only bits. Value = 2 Revision IDRead only bits. Value = 1 TABLE 3 - Proximity RATE REGISTER #2 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0n/aRate of Proximity Measurement (no.)