Rohm BH1730FVC Digital 16bit serial output type ambient light sensor ic Datasheet

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
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© 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.
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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
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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).
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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 ………
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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.
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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
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© 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
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© 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
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© 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
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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
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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
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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
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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.
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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.
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© 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.
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© 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
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© 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
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© 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.
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© 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)
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© 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/
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© 2012 ROHM Co., Ltd. All rights reserved.
R1120A
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