BH1730FVC Ambient Light Sensor ICs Digital 16bit Serial Output Type Ambient Light Sensor IC BH1730FVC No.11046EAT13 ●Descriptions 2 BH1730FVC is a digital Ambient Light Sensor IC for I C bus interface. This IC is the most suitable to obtain the ambient light data for adjusting LCD backlight power of TV, mobile phone. It is possible to detect very wide range light intensity. (0.008 65535 lx ). ●Features 2 1) I C bus Interface ( f / s Mode Support, Slave address "0101001". ) 2) There are two outputs that peaks of a spectrum response are in visible light (Type0) and in infrared light (Type1). 3) Illuminance to Digital Converter 4) Very wide range and High resolution. ( 0.008 - 65535 lx ) 5) Low Current by power down function 6) 50Hz / 60Hz light noise reject-function 7) Correspond to 1.8V logic input interface 8) Light source dependency is little by calculating with Type0 and Type1. ( ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light ) 9) Interrupt function is available. 10) Adjustable measurement result for influence of optical window ( It is possible to detect min. 0.001 lx, max. 100000 lx by using this function. ) 11) Small measurement variation (+/- 15%) 12) Built in power on reset circuit. ●Applications LCD TV, Mobile phone, NOTE PC, Portable game machine, Digital camera, Digital video camera, PDA, LCD display ●Absolute Maximum Ratings Parameter Supply Voltage INT , SDA, DVI, SCL, Terminal Voltage Symbol Limits Units VCCmax 4.5 V VINTmax, VSDAmax, VDVImax, VSCLmax 7 V Topr -40～70 ℃ Storage Temperature Tstg -40～100 ℃ SDA, INT Sink Current Imax 7 mA Pd 260※ mW Max. Units Operating Temperature Power Dissipation ※ 70mm × 70mm × 1.6mm glass epoxy board. Derating in done at 3.47mW/℃ for operating above Ta=25℃. ●Operating Conditions Parameter Symbol Min. Typ. VCC Voltage Vcc 2.4 3.0 3.6 V I2C Reference Voltage VDVI 1.65 - VCC V www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 1/20 2012.02 - Rev.A Technical Note BH1730FVC ●Electrical Characteristics ( VCC = 3.0V, VDVI = 3.0V, Ta = 25℃, unless otherwise noted ) Limits Parameter Symbol Units Min. Typ. Max. Supply Current Icc1 － 150 200 uA Powerdown Current Icc2 － 0.85 1.5 uA Peak Wave Length in Type0 λp0 － 600 － nm Peak Wave Length in Type1 λp1 － 840 － nm Conditions Ev = 100 lx ※1 CONTROL register(00h) = ”03h” and the other registers are default. No input Light All registers are default. Visible light response Infrared light response 1 EV = 1000 lx ※ TIMING register(01h) = “DAh” GAIN register(07h) = “00h” EV = 1000 lx ※1 TIMING register(01h) = “DAh” GAIN register(07h) = “00h” No input Light TIMING register(01h) = “DAh” GAIN register(07h) = “00h” No input Light TIMING register(01h) = “DAh” GAIN register(07h) = “00h” ADC count value in Type0 D1k_0 1020 1200 1380 count ADC count value in Type1 D1k_1 153 180 207 count Dark ( 0 lx ) Sensor out in Type0 S0_0 0 0 2 count Dark ( 0 lx ) Sensor out in Type1 S0_1 0 0 2 count Gain X1 resolution in Type0 rG1 － 0.83 － lx/count TIMING register(01h) = “DAh” ※1 Gain X2 resolution in Type0 rG2 － 0.42 － lx/count TIMING register(01h) = “DAh” ※1 Gain X64 resolution in Type0 rG64 － 0.014 － lx/count TIMING register(01h) = “DAh” ※1 Gain X128 resolution in Type0 rG128 － 0.007 － lx/count TIMING register(01h) = “DAh” ※1 tmt1 － 100 150 ms rIF － 1 － times EV = 1000 lx INT Output ‘L’ Voltage VINT 0 － 0.4 V IINT = 3 mA DVI Input ‘L’ Voltage VDVL － － 0.4 V SCL, SDA Input ‘H’ Voltage 1 VIH1 0.7*DVI － － V DVI ≧ 1.8V SCL, SDA Input ‘H’ Voltage 2 VIH2 1.26 － － V 1.65V ≦ DVI ＜1.8V SCL, SDA Input ‘L’ Voltage 1 VIL1 － － 0.3*DVI V DVI ≧ 1.8V SCL, SDA Input ‘L’ Voltage 2 VIL2 － － DVI–1.26 V 1.65V ≦ DVI ＜ 1.8V SCL, SDA, INT Input ‘H’ Current IIH － － 10 µA SCL, SDA, INT Input ‘L’ Current Measurement Time Incandescent / Fluorescent ratio by calculating with Type0 and Type1 IIL － － 10 µA 2 fSCL － － 400 kHz 2 tBUF 1.3 － － µs 0.6 － － µs 0.6 － － µs 0.6 － － µs I C SCL Clock Frequency I C Bus Free Time TIMING register(01h) = “DAh” 2 I C Hold Time ( repeated ) START tHDSTA Condition 2 I C Set up time for a Repeated tSUSTA START Condition 2 I C Set up time for STOP tSUSTO Condition I2C Data Hold Time tHDDAT 0 － 0.9 µs 2 tSUDAT 100 － － ns 2 tLOW 1.3 － － µs 2 tHIGH 0.6 － － µs 2 VOL 0 － 0.4 V I C Data Setup Time I C ‘L’ Period of the SCL Clock I C ‘H’ Period of the SCL Clock I C SDA Output ‘L’ Voltage IOL = 3 mA ※1 White LED is used as optical source. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 2/20 2012.02 - Rev.A Technical Note BH1730FVC 1.2 1 1 0.8 0.8 0.6 100000 10000 Measurement Resul 1.2 Ratio Ratio ●Reference Data 0.6 0.4 0.4 0.2 0.2 1000 100 10 0 0 400 500 600 700 800 900 1000 400 1100 500 600 Wavelength [ nm ] 700 800 900 1000 1 1100 Wavelength [ nm ] 1 10 100 1000 10000 100000 Illuminance [ lx ] 10 1 1 1pin 0.8 4 - 0.8 + Ratio 6 Ratio Measurement Result 1.2 1.2 8 0.6 - 2 -40 -20 0 20 40 60 80 0.2 0 0 -90 -60 -30 0 30 60 -60 1 Incandescent Light 0.8 0 60 0.5 200 150 100 1 1.5 0 2 2 Ratio 80 2.5 1 1 VCC=3V DVI=1.8V 0.8 0.8 Ratio Ratio 4 1.2 1.2 ICC @ POWER DOWN [ uA 3.5 Fig.9 VCC - ICC ( During measurement ) Fig.8 Light Source Dependency in calculation from Type0 and Type1. ( Fluorescent Light is set to '1' ) 10 1 3 VCC [ V ] Ta [ ℃ ] Fig.7 ADC count value in Type0 Temperature Dependency 90 50 0 40 60 250 White LED 0.2 30 300 Kripton Light 0.4 0 Fig.6 Directional Characteristics 2 Halogen Light 0.6 -30 Angle [ deg ] ICC @ Measuremen Fluorescent Light 20 + -90 90 Fig.5 Directional Characteristics 1 1.2 0 + Angle [ deg ] Fig.4 Dark Response of Type0 -20 - 1pin - + 0.2 Ta [ ℃ ] -40 0.6 0.4 0.4 0 Ratio Fig.3 Illuminance -Measurement Result of Type0, Gain 1X, ITIME=DAh Fig.2 Spectral Response of Type1 (infrared light peak) Fig.1 Spectral Response of Type0 (visible light peak) 0.6 0.4 0.6 0.4 0.2 0.2 0.1 -40 -20 0 20 40 60 80 Ta [ ℃ ] 0 2 2.5 3 3.5 4 VCC [ V ] Fig.10 Power down ICC@0Lx Temperature Dependency www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Fig.11 Measurement Result VCC Dependency 3/20 0 1.5 2 2.5 DVI [ V ] 3 3.5 Fig.12 Measurement Result DVI Dependency 2012.02 - Rev.A Technical Note BH1730FVC ●Block Diagram VCC AMP ADC ADC Logic + I2C Interface + INT Interface PD for visible light AMP DVI SCL SDA ADC PD for infrared light POR OSC GND INT ●Block Diagram Descriptions ・PD Photo diodes (PD) with peaks in visible light and in infrared light. ・AMP Integration OPAMP for converting from PD current to voltage. ・ADC AD converter for obtainment digital 16bit data. 2 ・ADC Logic + I C Interface + INT Interface 2 Ambient light calculation logic and I C Bus Interface and Interrupt function Interface. ・OSC Internal oscillator ( typ. 360kHz ). It is clock for internal logic. ・POR Power on reset. All register is reset after VCC is supplied. Please refer P14 (Caution of power on reset function). www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 4/20 2012.02 - Rev.A Technical Note BH1730FVC ●I2C Bus Access and Write / Read format 2 1 ) I C Bus interface timing chart 2 Write measurement command and Read measurement result are done by I C Bus interface. Please refer the formally 2 specification of I C Bus interface, and follow the formally timing chart. SDA tr tf tSU ; DAT tf tHD ; STA tHD tLOW tr tBUF SCL S tSU ; STA tHD ; STA tHD ; DAT tSU;STO Sr tHIGH t P S 2) Main write Format 1. Case of “Write to Command Register” ST 2. Slave Address 0101001 W 0 ACK Data to Command Register 1XXXXXXX ACK Slave Address 0101001 W 0 ACK Data specified at register address field 0XXXXXXX ACK Data specified at register address field +1 ACK ・・・ SP Case of “Write to Data Register” ST Data specified at register address field +N ACK ACK SP ※ The register address that set in Command register is used. 3. Case of "write to data register after write to Command Register" ST Slave Address 0101001 W 0 ACK Data specified at register address field ACK ・・・ Slave Address 0101001 R 1 ACK Data specified at register address field +1 ACK ・・・ Data to Command Register 1XXXXXXX ACK Data specified at register address field +N ACK ACK SP 3) Main read Format ST ACK Data specified at register address field Data specified at register address field +N ACK NACK SP ※ The register address that set in Command register is used. from slave to master from master to slave 2 ※ BH1730FVC operates as I C bus slave device. 2 ※ Please refer formality I C bus specification of NXP semiconductor BH1730FVC continues to write or read data with address increments until master issues stop condition. Read cycle is 00h - 01h - 02h - 03h - 04h - 05h - 06h – 07h – 12h – 14h – 15h – 16h – 17h - 00h ……… www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 5/20 2012.02 - Rev.A Technical Note BH1730FVC ●Measurement Procedure Power supply Initial state is Power Down mode after VCC and DVI supply. Power Down POWER bit = H and ADC_EN bit =H Measurement ONE_TIME bit = Ｈ? Yes No INT_STOP bit = H and INT is active? Yes No State Transition by I2C write-command. Automatically State Transition ●Explanation of Asynchronous reset and Software reset command. 1) Asynchronous reset All registers are reset and BH1730FVC becomes power down during DVI = 'L'. Initial reset is not necessary, because power on reset function is included in this product. 2) Software reset command All registers are reset and BH1730FVC becomes power down by Software reset command. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 6/20 2012.02 - Rev.A Technical Note BH1730FVC ●Command set Address -00h 01h 02h 03h 04h 05h 06h 07h 12h 14h 15h 16h 17h Type W RW RW RW RW RW RW RW RW R R R R R Register name COMMAND CONTROL TIMING INTERRUPT THLLOW THLHIGH THHLOW THHHIGH GAIN ID DATA0LOW DATA0HIGH DATA1LOW DATA1HIGH Register function Specifies register address or set special command Operation mode control Light integration time control Interrupt function control Low byte of low interrupt threshold setting High byte of low interrupt threshold setting Low byte of high interrupt threshold setting High byte of high interrupt threshold setting Gain control Part number and Revision ID ADC Type0 low byte data register ADC Type0 high byte data register ADC Type1 low byte data register ADC Type1 high byte data register ○COMMAND 7 CMD 6 5 TRANSACTION 4 3 2 1 ADDRESS / Special command 0 default value 00h Field CMD TRANSACTION Bit 7 Type W 6:5 W 4:0 W ADDRESS Special command www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Description Write 1 00 : COMMAND<4:0> is ADDRESS field. 01 : Reserved. 10 : Reserved. 11 : COMMAND<4:0> is Special command field. Specify register address. Don’t specify invalid register address. 00001 : Interrupt output reset. 00010 : Stop manual integration mode. 00011 : Start manual integration mode. 00100 : Software reset Don’t input other commands. 7/20 2012.02 - Rev.A Technical Note BH1730FVC ○CONTROL (00h) 7 6 5 ADC_ INTR RES 4 ADC_ VALID 3 ONE_ TIME 2 DATA_ SEL 1 ADC_ EN 0 POWER default value 00h Field RES Bit 7: 6 Type RW ADC_INTR 5 R ADC_VALID 4 R ONE_TIME 3 RW DATA_SEL 2 RW ADC_EN 1 RW POWER 0 RW ○TIMING (01h) 7 6 5 Description Write 00 0 : Interrupt is inactive. 1 : Interrupt is active. 0 : ADC data is not updated after last reading. 1 : ADC data is updated after last reading. 0 : ADC measurement is continuous. 1 : ADC measurement is one time. ADC changes to power down automatically. 0 : ADC measurement Type0 and Type1. 1 : ADC measurement Type0 only. 0 : ADC measurement is not started. 1 : ADC measurement is started. 0 : ADC power down. 1 : ADC power on. 4 3 2 1 0 ITIME default value DAh Field Bit Type ITIME 7:0 RW www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Description ADC Light Integration time control. 00000000 : Use manual integration mode. 11111111 : 1 cycle. 2.7ms. 11111110 : 2 cycle. 5.4ms. 11101101 : 19 cycle. 51.3ms. 11011010 : 38 cycle. 102.6ms. 10110110 : 74 cycle. 199.8ms. 01101100 : 148 cycle. 399.6ms. 00000001 : 255 cycle. 688.5ms. Cycle is defined 256-ITIME<7:0>. Integration time is typically cycle*2.7ms. ADC needs additional 2ms for internal calculation. 8/20 2012.02 - Rev.A Technical Note BH1730FVC ○INTERRUPT (02h) 7 RES 6 INT_ STOP 5 RES 4 INT_ EN 3 2 1 0 PERSIST default value 00h Bit 7 Type RW INT_STOP 6 RW RES 5 RW INT_EN 4 RW 3:0 RW Field RES PERSIST Description Write 0. 0 : ADC measurement is continuous. 1 : ADC measurement is stopped and ADC becomes power down state when interrupt becomes active. Write 0. 0 : Interrupt function is invalid. 1 : Interrupt function is valid. Interrupt persistence function. 0000 : Interrupt becomes active at each measurement end. 0001 : Interrupt status is updated at each measurement end. 0010 : Interrupt status is updated if two consecutive threshold judgments are the same. When set 0011 or more, interrupt status is updated if threshold judgments are the same over consecutive set times. ○TH_LOW (03h,04h) 7 6 5 4 3 Lower threshold data 2 1 0 default value 00h Register TH lower LSBs TH lower MSBs Address 03h 04h Bit 7:0 7:0 Type RW RW Description Lower byte Upper byte ○TH_UP (05h,06h) 7 6 5 4 3 Upper threshold data 2 1 0 default value FFh Register TH upper LSBs TH upper MSBs Address 05h 06h Bit 7:0 7:0 Type RW RW 4 3 Description Lower byte Upper byte ○GAIN (07h) 7 6 5 RES 2 1 GAIN 0 default value 00h Bit Field RES 7:3 Type RW GAIN 2:0 RW www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Description Write 00000. Change ADC resolution. X00 : X1 gain mode X01 : X2 gain mode X10 : X64 gain mode X11 : X128 gain mode 9/20 2012.02 - Rev.A Technical Note BH1730FVC ○PART_ID ( 12h ) 7 6 5 Part Number 4 3 2 1 Revision ID 0 default value 7Xh Field Part number Revision ID Bit 7:4 3:0 Type R R Description 0111 XXXX ○DATA0 (14h,15h) 7 6 5 4 3 ADC Type0 data 2 1 0 default value 00h Register DATA0 LSBs DATA0 MSBs Address 14h 15h Bit 7:0 7:0 Type R R Description Lower byte Upper byte ○DATA1 (16h,17h) 7 6 5 4 3 ADC Type1 data 2 1 0 default value 00h Register DATA1 LSBs DATA1 MSBs Address 16h 17h www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Bit 7:0 7:0 Type R R Description Lower byte Upper byte 10/20 2012.02 - Rev.A Technical Note BH1730FVC ●Measurement sequence example from "Write to start measurement" to "Read measurement result" from Slave to Master from Master to Slave ① Send "Continuous measurement mode" instruction Slave Address W ST 0101001 0 ACK Write Command Register 1000_0000 ACK Write CONTROL register 0000_0011 ACK SP ② Wait to complete 1st measurement. TIMING=DAh (typ. 100ms, max.150ms) and GAIN=00h (X1 Gain) at default. ③ Read measurement result. Slave Address ST 0101001 W 0 ACK Write Command Register 1001_0100 ACK Slave Address 0101001 R 1 ACK Read DATA0 LSBs register ACK ACK Read DATA1 LSBs register ACK Read DATA1 MSBs register NACK ST Read DATA0 MSBs register SP SP ●Application circuit example If you don't use INT Pin, please connect to GND or open. INT pin pull up resister I2C bus pull up resister 100kohm 2.2kΩ 2.2kΩ I2C bus voltage source BH1730FVC 0.1µF VCC SCL INT DVI GND SDA 0.1µF Micro Controller www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 11/20 2012.02 - Rev.A Technical Note BH1730FVC ●Lux calculation from DATA0 and DATA1 BH1730FVC has two outputs, DATA0 (14h, 15h) for detecting visible light and infrared light, and DATA1 (16h, 17h) for detecting infrared light. Lux value can be calculated by using these two outputs. The calculation formula depends on the characteristic of optical window. The example of the calculation is shown as follows. Ex) No optical window or optical window that has flat transmittance from visible light to infrared light. i f ( D ATA 1 / D ATA 0 < 0 . 2 6 ) e l s e i f ( D ATA 1 / D ATA 0 < 0 . 5 5 ) e l s e i f ( D ATA 1 / D ATA 0 < 1 . 0 9 ) e l s e i f ( D ATA 1 / D ATA 0 < 2 . 1 3 ) else www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. Lx = ( Lx = ( Lx = ( Lx = ( Lx=0 1 . 2 9 0 * D ATA 0 0 . 7 9 5 * D ATA 0 0 . 5 1 0 * D ATA 0 0 . 2 7 6 * D ATA 0 12/20 - 2 . 7 3 3 * D ATA 1 0 . 8 5 9 * D ATA 1 0 . 3 4 5 * D ATA 1 0 . 1 3 0 * D ATA 1 ) ) ) ) / / / / Gain Gain Gain Gain * * * * 100ms 100ms 100ms 100ms / / / / ITIME ITIME ITIME ITIME 2012.02 - Rev.A Technical Note BH1730FVC ● Interrupt function Interrupt function compares measurement result to preset interrupt threshold level. BH1730FVC uses two threshold level (upper and lower ). If measurement result is outside of two threshold, INT pin outputs ’L’. Interrupt threshold is defined at Interrupt threshold registers ( 03h - 06h ). Interrupt function is able to control by Interrupt opecode. Interrupt persistence is defined at Interrupt opecode lower 4 bits. INT pin is Nch open drain terminal so this terminal should be pull-up to some kind of voltage source by an external resister. Maximum sink current rating of this terminal is 7mA. INT terminal is high impedance when VCC is supplied. INT terminal becomes inactive by setting “Interrupt output reset” special command. VCC current (approximately 30uA at VCC=3.0V ) is consumed during INT terminal is ‘L’. So it is recommended to reset INT terminal at once when interrupt is detected. Master writes “Interrupt output reset” command. INT Terminal H persistence = 1 L H persistence = 2 L DATA0 Interrupt threshold H level sequential measurement results Interrupt threshold L level time www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 13/20 2012.02 - Rev.A Technical Note BH1730FVC ●Caution of power on reset function BH1730FVC has power on reset ( POR ) function. POR is to reset all register and flip flop when VCC Power supplies. There is some cautions about power on and down sequence seeing in below. ① Power on time : t1 More than 2ms is need to active BH1730FVC after VCC supplies more than 2.0V from VCC is less than 0.4V. ② Power off time : t2 More than 1ms (VCC < 0.4V) is need to active BH1730FVC. 2.0V VCC 0.4V t1 t2 t1 BH1730FVC Don’t care Don’t care active active *”active state” is that BH1730FVC works and accept I2C bus access correctly. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 14/20 2012.02 - Rev.A Technical Note BH1730FVC ●ALS sensitivity adjustment function BH1730FVC is possible to change ALS sensitivity. And it is possible to cancel the optical window influence (difference with / without optical window ) by using this function. Adjustment is done by changing measurement time. For example, when transmission rate of optical window is 50% (measurement result becomes 0.5 times if optical window is set), influence of optical window is ignored by changing sensor sensitivity from default to 2 times. Sensitivity can be adjusted by ITIME (01h<7:0>). The measurement time is proportional to “256- ITIME”. For example, sensitivity is twice when “256- ITIME” is twice, and the measurement time is twice, too. The range of adjusting TIMING is below. Sensitivity range of TIMING (binary) range of TIMING (decimal) Measurement time Min. Typ. Max. Default*0.026 Default Default*6.711 1111_1111 1101_1010 0000_0001 255 218 1 102.6ms 688.5ms 2.7ms It is possible to detect 0.001 lx by using this function at GAIN = x128. The below formula is to calculate illuminant per 1 count. Illuminant per 1 count in Type0 at GAIN = x1( lx / count ) = 1 / 1.2 * (256 - 218) / (256 – X) 218 : Default value of ITIME (decimal) X : ITIME value (decimal) Illuminant per 1 count in Type0 at GAIN = x128( lx / count ) = 1 / 1.2 * (256 - 218) / (256 – X) / 128 218 : Default value of ITIME (decimal) X : ITIME value (decimal) 128 : Gain value Illuminant per 1 count in Type0 at GAIN = x1 is as following within adjustable range of ITIME. ITIME value 1111_1111 1101_1010 Illuminant per 1count(lx / count) 31.67 0.833 0000_0001 0.124 Illuminant per 1 count in Type0 at GAIN = x128 is as following within adjustable range of ITIME. ITIME value 1111_1111 1101_1010 Illuminant per 1count(lx / count) 0.247 0.007 0000_0001 0.001 Please take care that about 100,000lx or more cannot be measured even if decreasing the sensitivity. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 15/20 2012.02 - Rev.A Technical Note BH1730FVC ●Terminal Description PIN No. Terminal Name 1 Equivalent Circuit VCC Function Power supply terminal INT Pin output terminal. 2 INT 3 GND GND terminal 4 SDA I2C bus Interface SDA terminal 5 DVI 6 SCL If you don't use INT Pin, please connect to GND or open. 150kOhm SDA, SCL reference voltage terminal and asynchronous reset terminal for internal registers. Initial reset is not necessary, because power on reset function is included in this product. DVI terminal is pulled down by 150kOhm while DVI is set 'L' I2C bus Interface SCL terminal ※These values are design-value, not guaranteed. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 16/20 2012.02 - Rev.A Technical Note BH1730FVC ●Package Outlines Lot No. A H Production code WSOF6 ( Unit : mm ) ●About an optical design on the device 0.8 mm 1.3 mm Min .0.4 mm Min .0.4 mm Sensitivity area( 0.25mm x 0.3mm) Please design the optical window so that light can cover at least this area. Min.0. 4 mm Min .0.4 mm www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 17/20 2012.02 - Rev.A Technical Note BH1730FVC ●The method of distinguishing 1pin. There is some method of distinguishing 1pin. ① Distinguishing by 1Pin marking ② Distinguishing by die pattern ③ Distinguishing by taper part of 1-3pin side ②(by die pattern) is the easiest method to distinguish by naked eye. A H ② Production code ③ ① www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 18/20 2012.02 - Rev.A Technical Note BH1730FVC ●Notes for use 1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage ( Vccmax ), temperature range of operating conditions ( Topr ), etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. 2) GND voltage Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient. 3) Short circuit between terminals and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between terminals or between the terminal and the power supply or the GND terminal, the ICs can break down. 4) Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. 5) Inspection with set PCB On the inspection with the set PCB, if a capacitor is connected to a low-impedance IC terminal, the IC can suffer stress. Therefore, be sure to discharge from the set PCB by each process. Furthermore, in order to mount or dismount the set PCB to/from the jig for the inspection process, be sure to turn OFF the power supply and then mount the set PCB to the jig. After the completion of the inspection, be sure to turn OFF the power supply and then dismount it from the jig. In addition, for protection against static electricity, establish a ground for the assembly process and pay thorough attention to the transportation and the storage of the set PCB. 6) Input terminals In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input terminal. Therefore, pay thorough attention not to handle the input terminals; such as to apply to the input terminals a voltage lower than the GND respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input terminals when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input terminals a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. 7) Thermal design Perform thermal design in which there are adequate margins by taking into account the power dissipation ( Pd ) in actual states of use. 8) Treatment of package Dusts or scratch on the photo detector may affect the optical characteristics. Please handle it with care. 9) Rush current When power is first supplied to the CMOS IC, it is possible that the internal logic may be unstable and rush current may flow instantaneously. Therefore, give special consideration to power coupling capacitance, power wiring, width of GND wiring, and routing of connections. 10) The exposed central pad on the back side of the package There is an exposed central pad on the back side of the package. But please do it non connection. ( Don't solder, and don't do electrical connection ) Please mount by Footprint dimensions described in the Jisso Information for WSOF6I. This pad is GND level, therefore there is a possibility that LSI malfunctions and heavy-current is generated. www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 19/20 2012.02 - Rev.A Technical Note BH1730FVC ●Ordering part number B H 1 Part No. 7 3 0 F Part No. V C Package FVC: WSOF6 - T R Packaging and forming specification TR: Embossed tape and reel WSOF6 <Tape and Reel information> 5 4 4 5 6 (0.45) 6 (1.5) (1.2) 1 2 3 3 2 0.75MAX Embossed carrier tape Quantity 3000pcs Direction of feed TR The direction is the 1pin of product is at the upper right when you hold ( reel on the left hand and you pull out the tape on the right hand ) 1pin 1 1PIN MARK 0.3 Tape (0.15) 3.0±0.1 2.6±0.1 (MAX2.8 include BURR) 1.6±0.1 (MAX1.8 include BURR) 0.145±0.05 S 0.08 S 0.5 0.22±0.05 0.08 Direction of feed M Reel (Unit : mm) www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. 20/20 ∗ Order quantity needs to be multiple of the minimum quantity. 2012.02 - Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved. R1120A