Rohm BH1730FVC Technical Note

Ambient Light Sensor ICs

Digital 16bit Serial Output Type Ambient Light Sensor IC

BH1730FVC

●Descriptions

BH1730FVC is a digital Ambient Light Sensor IC for I 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

●Applications

●Absolute Maximum Ratings

●Operating Conditions

2

1) I

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.

LCD TV, Mobile phone, NOTE PC, Portable game machine, Digital camera, Digital video camera, PDA, LCD display

C bus Interface ( f / s Mode Support, Slave address "0101001". )

Parameter Symbol Limits Units

Supply Voltage VCCmax

INT , SDA, DVI, SCL, Terminal Voltage V Operating Temperature Topr -40～70 ℃ Storage Temperature Tstg -40～100 ℃

SDA, INT Sink Current Imax 7 mA

Power Dissipation Pd 260※ mW

※ 70mm × 70mm × 1.6mm glass epoxy board. Derating in done at 3.47mW/℃ for operating above Ta=25℃.

Parameter Symbol Min. Typ. Max. Units

VCC Voltage Vcc 2.4 3.0 3.6 V

I2C Reference Voltage VDVI 1.65 - VCC V

2

C bus interface. This IC is the most suitable to obtain the ambient light

4.5 V

7 V

max, V

INT

SDA

max, V

DVI

SCL

max

No.11046EAT13

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●Electrical Characteristics ( VCC = 3.0V, VDVI = 3.0V, Ta = 25℃, unless otherwise noted )

Parameter Symbol

Min. Typ. Max.

Limits

Units Conditions

Ev = 100 lx

Supply Current Icc1 － 150 200 uA

CONTROL register(00h) = ”03h” and the other registers are default.

Powerdown Current Icc2 － 0.85 1.5 uA

No input Light All registers are default.

Peak Wave Length in Type0 λp0 － 600 － nm Visible light response

Technical Note

※

Peak Wave Length in Type1 λp1 － 840 － nm Infrared light response

※

ADC count value in Type0 D1k_0 1020 1200 1380 count

ADC count value in Type1 D1k_1 153 180 207 count

EV = 1000 lx TIMING register(01h) = “DAh” GAIN register(07h) = “00h” EV = 1000 lx TIMING register(01h) = “DAh” GAIN register(07h) = “00h” No input Light

Dark ( 0 lx ) Sensor out in Type0 S0_0 0 0 2 count

TIMING register(01h) = “DAh” GAIN register(07h) = “00h” No input Light

Dark ( 0 lx ) Sensor out in Type1 S0_1 0 0 2 count

TIMING register(01h) = “DAh” GAIN register(07h) = “00h”

Gain X1 resolution in Type0 rG1 － 0.83 － lx/count TIMING register(01h) = “DAh”

Gain X2 resolution in Type0 rG2 － 0.42 － lx/count TIMING register(01h) = “DAh”

Gain X64 resolution in Type0 rG64 － 0.014 － lx/count TIMING register(01h) = “DAh”

Gain X128 resolution in Type0 rG128 － 0.007 － lx/count TIMING register(01h) = “DAh”

Measurement Time tmt1 － 100 150 ms TIMING register(01h) = “DAh”

Incandescent / Fluorescent ratio by calculating with Type0 and

rIF － 1 － times EV = 1000 lx

Type1 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

1

※

1

※

1

※

1

※

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 IIL －－ 10 µA

I2C SCL Clock Frequency fSCL －－ 400 kHz

I2C Bus Free Time tBUF 1.3 －－ µs

I2C Hold Time ( repeated ) START Condition I2C Set up time for a Repeated START Condition I2C Set up time for STOP Condition

tHDSTA 0.6 －－ µs

tSUSTA 0.6 －－ µs

tSUSTO 0.6 －－ µs

I2C Data Hold Time tHDDAT 0 － 0.9 µs

I2C Data Setup Time tSUDAT 100 －－ ns

I2C ‘L’ Period of the SCL Clock tLOW 1.3 －－ µs

I2C ‘H’ Period of the SCL Clock tHIGH 0.6 －－ µs

I2C SDA Output ‘L’ Voltage VOL 0 － 0.4 V IOL = 3 mA

※1 White LED is used as optical source.

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Technical Note

●Reference Data

1.2

1

0.8

0.6

Ratio

0.4

0.2

0

400 500 600 700 800 900 1000 1100

Wavelength [ nm ]

Fig.1 Spectral Response of Type0

(visible light peak)

10

8

6

4

Measurement Result

2

0

-40-20 0 20406080

Fig.4 Dark Response of Type0

Ta [ ℃ ]

1.2

1

0.8

0.6

Ratio

0.4

0.2

0

-40-20020406080

Fig.7 ADC count value in Type0

Temperature Dependency

Ta [ ℃ ]

10

1

ICC @ POWER DOWN [ uA

0.1

-40-200 20406080

Ta [ ℃ ]

Fig.10 Power down ICC@0Lx

Temperature Dependency

1.2

1

0.8

0.6

Ratio

0.4

0.2

0

400 500 600 700 800 900 1000 1100

Wavelength [ nm ]

Fig.2 Spectral Response of Type1

(infrared light peak)

1.2

1

0.8

0.6

Ratio

0.4

0.2

0

-90 -60 -30 0 30 60 90

1pin

-

Ang le [ deg ]

+

Fig.5 Directional Characteristics 1

Fl uoresc ent

Lig ht

Incandes cent

Lig ht

Halogen

Lig ht

Kripton Li ght

White LED

00.511.52

Ratio

Fig.8 Light Source Dependency in calculation from Type0 and Type1.

( Fluorescent Light is set to '1' )

1.2

1

0.8

0.6

Ratio

0.4

0.2

0

2 2.5 3 3.5 4

DVI=1.8V

VCC [ V ]

Fig.11 Measurement Result

VCC Dependency

100000

10000

1000

100

Measurement Resu

10

1

1 10 100 1000 10000 100000

Illumi nance [ l x ]

Fig.3 Illuminance -Measurement

Result of Type0, Gain 1X, ITIME=DAh

1.2

1

0.8

0.6

Ratio

0.4

0.2

0

-90 -60 -30 0 30 60 90

Ang le [ deg ]

-

1pin

-

+

Fig.6 Directional Characteristics 2

300

250

200

150

100

ICC @ Measuremen

50

0

2 2.5 3 3.5 4

VCC [ V ]

Fig.9 VCC - ICC

( During measurement )

1.2

1

0.8

0.6

Ratio

0.4

0.2

0

1.5 2 2.5 3 3.5

VCC=3V

DVI [ V ]

Fig.12 Measurement Result

DVI Dependency

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●Block Diagram

●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.

・ADC Logic + I

2

C Interface + INT Interface

Ambient light calculation logic and I

・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).

AMP

PD for visible light

AMP

PD for infrared light

2

C Bus Interface and Interrupt function Interface.

VCC

ADC

OSC

GND

DVI

ADC Logic

+

2

I

C Interface

+

INT Interface

INT

Technical Note

SCL

SDA

POR

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Technical Note

●I2C Bus Access and Write / Read format

2

C Bus interface timing chart

1 ) I

Write measurement command and Read measurement result are done by I specification of I

2

C Bus interface, and follow the formally timing chart.

2

C Bus interface. Please refer the formally

SDA

tf

t

LOW

t

tr

SU ; DAT

t

f

t

HD ; STA

SCL

S

t

HD ; STA

t

HD ; DAT

t

HIGH

t

SU ; STA

Sr

t

SU;STO

2) Main write Format

1. Case of “Write to Command Register”

ST

Slave Address

0101001

W

0

ACK

Data to Command Register

1XXXXXXX

2. Case of “Write to Data Register”

ST

Slave Address

0101001

W

0

ACK

Data specified at register address field

0XXXXXXX

Data specified at register address

field +1

ACK

・・・ ACK

Data specified at register address

field +N

※ 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 to Command Register

1XXXXXXX

Data specified at register address

field

ACK

・・・ ACK

Data specified at register address

field +N

3) Main read Format

ST

Slave Address

0101001

R

ACK Data specified at register address field

1

Data specified at register

address field +1

ACK ・・・ ACK

Data specified at register

address field +N

※ The register address that set in Command register is used.

from master to slave

from slave to master

BH1730FVC operates as I2C bus slave device.

※

Please refer formality I2C 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 ………

tr

t

BUF

P

ACK

SP

ACK

SP

ACK

SP

ACK

NACK SP

S

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●Measurement Procedure

●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.

Power supply

Power Down

POWER bit = H and ADC_EN bit =H

Measurement

ONE_TIME bit = Ｈ?

No

INT_STOP bit = H and INT is active?

No

Initial state is Power Down mode after VCC and DVI supply.

Yes

State Transition by I2C write-command.

Automatically State Transition

Technical Note

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●Command set

Address Type Register name Register function

-- W COMMAND Specifies register address or set special command

00h RW CONTROL Operation mode control

01h RW TIMING Light integration time control

02h RW INTERRUPT Interrupt function control

03h RW THLLOW Low byte of low interrupt threshold setting

04h RW THLHIGH High byte of low interrupt threshold setting

05h RW THHLOW Low byte of high interrupt threshold setting

06h RW THHHIGH High byte of high interrupt threshold setting

07h RW GAIN Gain control

12h R ID Part number and Revision ID

14h R DATA0LOW ADC Type0 low byte data register

15h R DATA0HIGH ADC Type0 high byte data register

16h R DATA1LOW ADC Type1 low byte data register

17h R DATA1HIGH ADC Type1 high byte data register

○COMMAND

7 6 5 4 3 2 1 0

CMD TRANSACTION ADDRESS / Special command

Field

CMD 7

TRANSACTION 6 : 5 W

ADDRESS

Special command

Bit

Type Description

W

4 : 0 W

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.

Technical Note

default value 00h

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○CONTROL (00h)

7 6 5 4 3 2 1 0

Field

RES 7: 6

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 4 3 2 1 0

Field

ITIME 7 : 0

RES

ADC_

INTR

Bit

Type Description

RW

Bit

Type Description

RW

ADC_ VAL ID

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.

ADC Light Integration time control. 00000000 : Use manual integration mode. 11111111 : 1 c y c l e. 2.7ms. 11111110 : 2 c y c le. 5.4m s . 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.

ITIME

ONE_

TIME

DATA_

SEL

ADC_

EN

Technical Note

POWER

default value 00h

default value DAh

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○INTERRUPT (02h)

7 6 5 4 3 2 1 0

RES

Field

RES

INT_STOP

RES

INT_EN

PERSIST

○TH_LOW (03h,04h)

7 6 5 4 3 2 1 0

Register Address Bit TH lower LSBs 03h 7 : 0 RW Lower byte TH lower MSBs 04h 7 : 0 RW Upper byte

○TH_UP (05h,06h)

7 6 5 4 3 2 1 0

Register Address Bit TH upper LSBs 05h 7 : 0 RW Lower byte TH upper MSBs 06h 7 : 0 RW Upper byte

○GAIN (07h)

7 6 5 4 3 2 1 0

Field

RES 7 : 3

GAIN 2 : 0 RW

INT_

STOP

Technical Note

RES

Bit

Type Description

7

RW Write 0.

6

RW

5

RW Write 0.

4

RW

3 : 0

RW

RES GAIN

Bit

Type Description

RW

INT_

EN

0 : ADC measurement is continuous. 1 : ADC measurement is stopped and ADC becomes

power down state when interrupt becomes active.

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.

Lower threshold data

PERSIST

default value 00h

Type Description

Upper threshold data

default value FFh

Type Description

default value 00h

Write 00000.

Change ADC resolution. X00 : X1 gain mode X01 : X2 gain mode X10 : X64 gain mode X11 : X128 gain mode

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○PART_ID ( 12h )

7 6 5 4 3 2 1 0

Field Bit Type Description

Part number 7 : 4

Revision ID 3 : 0 R XXXX

○DATA0 (14h,15h)

7 6 5 4 3 2 1 0

Register Address Bit DATA0 LSBs 14h 7 : 0 R Lower byte DATA0 MSBs 15h 7 : 0 R Upper byte

○DATA1 (16h,17h)

7 6 5 4 3 2 1 0

Register Address Bit DATA1 LSBs 16h 7 : 0 R Lower byte DATA1 MSBs 17h 7 : 0 R Upper byte

Part Number Revision ID

R

0111

ADC Type0 data

Type Description

ADC Type1 data

Type Description

Technical Note

default value 7Xh

default value 00h

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Technical Note

●Measurement sequence example from "Write to start measurement" to "Read measurement result"

from Master to Slave

from Slave to Master

① Send "Continuous measurement mode" instruction

ST

Slave Address

0101001

W

0

ACK

Write Command Register

1000_0000

Write CONTROL register

0000_0011

② Wait to complete 1st measurement. TIMING=DAh (typ. 100ms, max.150ms) and GAIN=00h (X1 Gain) at default.

③ Read measurement result.

ST

Slave Address

0101001

W

0

ACK

Write Command Register

1001_0100

ST

Slave Address

0101001

R

ACK Read DATA0 LSBs register

1

ACK

SP

Read DATA0 MSBs register

●Application circuit example

If you don't use INT Pin, please connect to GND or open.

INT pin pull up resister

0.1µF

100kohm

BH1730FVC

VCC

INT

GND

Micro Controller

SCL

DVI

SDA

ACK Read DATA1 LSBs register ACK

Read DATA1 MSBs register

NACK

I2C bus pull up resister

2.2kΩ

I2C bus voltage source

0.1µF

SP

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●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.

if (DATA1/DATA0<0.26) Lx = ( 1.290*DATA0 - 2.733*DATA1 ) / Gain * 100ms / ITIME else if (DATA1/DATA0<0.55) Lx = ( 0.795*DATA0 - 0.859*DATA1 ) / Gain * 100ms / ITIME else if (DATA1/DATA0<1.09) Lx = ( 0.510*DATA0 - 0.345*DATA1 ) / Gain * 100ms / ITIME else if (DATA1/DATA0<2.13) Lx = ( 0.276*DATA0 - 0.130*DATA1 ) / Gain * 100ms / ITIME else Lx=0

Technical Note

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● 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.

Technical Note

INT Terminal

persistence = 1 persistence = 2

DATA0

Interrupt threshold H level

H

L

H

L

Interrupt threshold L level

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sequential measurement results

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●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.

VCC

BH1730FVC

*”active state” is that BH1730FVC works and accept I2C bus access correctly.

2.0V

0.4V

Don’t care

t1

active

t2

Don’t care

t1

Technical Note

active

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●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.

Min. Typ. Max.

Sensitivity

range of TIMING (binary)

range of TIMING (decimal)

Measurement time

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)

Illuminant per 1 count in Type0 at GAIN = x128( lx / count ) = 1 / 1.2 * (256 - 218) / (256 – X) / 128

Illuminant per 1 count in Type0 at GAIN = x1 is as following within adjustable range of ITIME.

Illuminant per 1 count in Type0 at GAIN = x128 is as following within adjustable range of ITIME.

Please take care that about 100,000lx or more cannot be measured even if decreasing the sensitivity.

Default*0.026

1111_1111

255

2.7ms

218 : Default value of ITIME (decimal) X : ITIME value (decimal)

218 : Default value of ITIME (decimal) X : ITIME value (decimal) 128 : Gain value

ITIME value Illuminant per 1count(lx / count)

1111_1111 3 1 . 6 7

1101_1010 0.833

0000_0001 0.124

ITIME value Illuminant per 1count(lx / count)

1111_1111 0 . 2 4 7

1101_1010 0.007

0000_0001 0.001

Default

1101_1010

218

102.6ms

Technical Note

Default*6.711

0000_0001

1

688.5ms

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●Terminal Description

PIN No. Terminal Name Equivalent Circuit Function

1 VCC Power supply terminal

2 INT

INT Pin output terminal.

If you don't use INT Pin, please connect to GND or open.

Technical Note

3 GND

4 SDA

5 DVI

6 SCL

150kOhm

GND terminal

I2C bus Interface SDA terminal

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.

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●Package Outlines

A

H

Technical Note

Lot No.

Production code

●About an optical design on the device

0 . 8 mm

Min . 0 . 4 mm

1.3 mm

WSOF6 ( Unit : 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

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Min . 0 . 4 mm

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●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.

Technical Note

②

A

H

Production code

①

③

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●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.

Technical Note

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2012.02 - Rev.A

BH1730FVC

●Ordering part number

B H 1 7 3 0 F V C - T R

Part No. Part No.

WSOF6

1.6±0.1

(MAX1.8 include BURR)

654

456

2.6±0.1

3.0±0.1

(MAX2.8 include BURR)

1

0.3

0.75MAX

0.5

23

1PIN MARK

0.22±0.05

(1.2)

3

S

0.08 S

(1.5)

21

0.08

(0.45)

(0.15)

0.145±0.05

M

(Unit : mm)

Package

FVC: WSOF6

Embossed carrier tapeTape

Quantity

Direction of feed

3000pcs 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

Reel

Packaging and forming specification TR: Embossed tape and reel

Order quantity needs to be multiple of the minimum quantity.

∗

Technical Note

1pin

Direction of feed

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2012.02 - Rev.A

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied 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 specications, 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 specied 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 specied 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 specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).

The Products specied 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, re or any other damage caused in the event of the failure of any Product, such as derating, redundancy, re 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.

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R1120A

Rohm BH1730FVC Technical Note

Specifications and Main Features

Frequently Asked Questions

User Manual