Optical Proximity Sensor ICs
1chip Optical Proximity +
Ambient Light Sensor IC
BH1772GLC
No.12100EFT12
●Descriptions
BH1772GLC is the IC into which optical proximity sensor and digital ambient light senor are unified. Proximity sensor part
detects the human or object approach by reflection of infrared LED(IrLED) light. Ambient light sensor part can detect the
wide range illuminance from the dark up to under direct sun light. The illuminant intensity of LCD display and keypad can be
adjusted, so lower current consumption or higher visibility are possible.
●Features
2
1) Correspond to I C bus interface ( f/s mode support )
2) Low Current by power down function
3) Correspond to 1.8V logic interface
4) ALS spectral responsibility is approximately human eye response ( Peak wavelength : typ. 550nm )
5) Correspond to wide range of light intensity ( 1-65535 lx range )
6) Rejecting 50Hz/60Hz light noise (ALS function)
7) Built in ambient light cancelation (Proximity sensor function)
8) Built in configurable IrLED current driver
●Applications
Mobile phone, DSC, Portable game, Camcoder, PDA, LCD display etc.
●Absolute Maximum Ratings
( Ta = 25℃ )
Parameter
Symbol
Ratings
Units
Vccmax
4.5
V
SDA,SCL,GNDNC Terminal Voltage
VSDAmax, VSCLmax,
VGNDNCmax
4.5
V
LEDC,INT Terminal Voltage
VLEDCmax, VINTmax
7
V
Operating Temperature
Topr
-40～85
℃
Storage Temperature
Tstg
-40～100
℃
SDA, INT Sink Current
Imax
7
mA
Pd
250※
mW
VCC, Supply Voltage
Power Dissipation
※
70mm × 70mm × 1.6mm glass epoxy board. Decreasing rate is 3.33mW/℃ for operating above Ta=25℃
●Operating Conditions
Parameter
VCC Voltage
LEDC Terminal Voltage
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
Ratings
Symbol
Units
Min.
Typ.
Max.
Vcc
2.3
2.5
3.6
V
Vledc
0.7
2.5
5.5
V
1/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Electrical characteristics ( Vcc = 2.5V, Ta = 25℃, unless otherwise noted. )
Limits
Parameter
Symbol
Units
Min.
Typ.
Max.
Conditions
Ev = 100 lx ※1
Average current when ALS_CONTROL
register(40h) = ” 03h ” and the other
registers are default.
Average current when PS_CONTROL
register(41h) = ” 03h ”
and the other registers are default.
Supply current for ALS
Icc1
－
90
180
μA
Supply current for PS
Icc2
－
90
180
μA
Supply current
for PS during driving LED current
Icc3
－
6.5
8.5
mA
Standby mode current
Icc4
－
0.8
1.5
μA
ALS & PS standby
No Input Light
tMALS
－
100
125
ms
H-Resolution mode
ALS measurement accuracy
S/A
0.85
1.0
1.15
Times
Sensor out / Actual lx, Ev = 1000 lx
ALS dark ( 0 lx ) sensor out
ALS0
0
0
2
count
H-Resolution mode
0
0
30
count
Ambient irradiance = 0μW/cm
2
120
128
136
count
Ambient irradiance = 0μW/cm
2
twILED
－
200
250
μs
PS measurement time
tMPS
－
10
12.5
ms
LEDC terminal sink current
at LEDC terminal voltage = 1.3V
ILEDC
18
20
22
mA
VINT
0
－
0.4
V
SCL SDA input 'H' Voltage
VIH
1.26
－
－
V
SCL SDA input 'L' Voltage
VIL
－
－
0.54
V
SCL SDA input 'H'/’L’ Current
IIHL
-10
－
10
μA
I2C SDA output 'L' Voltage
VOL
0
－
0.4
V
ALS measurement time
PS sensor out
PS0
(No proximity object)
PS sensor out (Irradiance
PS324u
by proximity object = 324uW/cm2)
ILED pulse duration
INT output ‘L’ Voltage
※1
ILED register(42h)
[2:0] = ” 010 ”
IINT = 3mA
IOL = 3mA
※1 White LED is used as optical source
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
2/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●I2C bus timing characteristics ( Vcc = 2.5V, Ta = 25℃, unless otherwise noted. )
Limits
Symb
Parameter
Units
ol
Min.
Typ.
Max.
I2C SCL Clock Frequency
fSCL
0
－
400
kHz
tHD;STA
0.6
－
－
μs
I2C 'L' Period of the SCL Clock
tLOW
1.3
－
－
μs
I2C 'H' Period of the SCL Clock
tHIGH
0.6
－
－
μs
I C Set up time
for a Repeated START Condition
tSU;STA
0.6
－
－
μs
I2C Data Hold Time
tHD;DAT
0
－
－
μs
I2C Data Setup Time
tSU;DAT
100
－
－
ns
tSU;STO
0.6
－
－
μs
tBUF
1.3
－
－
μs
I2C Data Valid Time
tVD;DAT
－
－
0.9
μs
I2C Data Valid Acknowledge Time
tVD;ACK
－
－
0.9
μs
I2C Hold Time ( Repeated )
START Condition
Conditions
2
I2C Set up Time
for STOP Condition
I2C Bus Free Time between
a STOP and START Condition
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
3/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Package outlines
A
C
Production code
Lot No.
WLGA010V28
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
4/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Reference Data
56
1.0
0.6
0.4
0.2
48
Measurement Result
Measurement Result
10000
0.8
Ratio
100000
64
1.2
40
32
24
16
1000
100
10
8
1
0
0.0
400
500
600
700
800
900
1000
0
1100
8
16
24
32
40
48
56
1
64
10
100
1.2
1.2
1
1
10000
100000
Fig.3 Illuminance ALS Measurement Result 2
Fig.2 Illuminance ALS Measurement Result
Fig.1 ALS Spectral Response
1000
Illuminance [ lx ]
Illuminance [ lx ]
Wavelength [ nm ]
10
1pin
0.6
0.4
-
0.6
1pin
-
0.4
+
-
+
0.2
0.2
0
-90
-60
-30
0
Measurement Result
8
0.8
+
-
Ratio
Ratio
0.8
30
60
2
+
-90
-60
-30
0
30
60
0
90
-40
Fig.5 ALS Directional Characteristics 2
Incandescent
Light
0.8
Ratio
Halogen Light
0.6
Kripton Light
0.4
Artifical Sun
Light
0.2
White LED
60
80
60
80
100
150
100
50
0
0
0
40
200
ICC @ Measurement [ uA ]
1
40
20
Fig.6 ALS Dark Response
Fluorescent
Light
20
0
Ta [ ℃ ]
1.2
0
-20
Angle [ deg ]
Fig.4 ALS Directional Characteristics 1
-20
4
0
90
Angle [ deg ]
-40
蛍光灯白熱灯感度比
6
0.5
1
1.5
Ratio
2
2
2.5
3
VCC [ V ]
3.5
4
100
Ta [ ℃ ]
Fig.7 ALS Measurement Accuracy
Temperature Dependency
1.2
1
1.20
1.2
1.00
1
0.80
0.8
Ratio
0.6
Ratio
1pin
0.8
Ratio
Fig.9 VCC - ICC
( During ALS measurement )
Fig.8 ALS Light Source Dependency
( Fluorescent Light is set to '1' )
0.60
0.4
0.2
0
2.4
2.6
2.8
3
3.2
VCC [ V ]
3.4
3.6
3.8
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
+
0
0.00
400
500
600
700
800
900
1000
Wavelength [nm]
Fig.10 ALS Measurement Result
VCC Dependency
-
0.2
0.20
2.2
+
0.6
0.4
0.40
-
Fig.11 PS Spectral Response
5/29
1100
-90
-60
-30
0
30
60
90
Angle [ deg ]
Fig.12 PS Directional Characteristics 1
2012. 06 - Rev.F
BH1772GLC
Technical note
1.2
200
260
240
1
ICC @ Measurement [ uA ]
220
200
180
PS_DATAOUT
Ratio
0.8
-
0.6
1pin
-
0.4
160
140
120
100
80
+
60
0.2
+
150
100
50
40
20
0
-90
-60
-30
0
30
60
0
0
0.001
90
Angle [ deg ]
0.01
0.1
1
10
100
2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8
VCC [ V ]
1000
Irradiance(mW/cm2]
Fig.13 PS Directional Characteristics 2
Fig.15 VCC - ICC
( During PS measurement )
Fig.14 Irradiance – PS_DATAOUT
200
20
160
16
120
ICC @ POWER DOWN [ uA ]
24
ILEDC[mA]
12
80
8
40
4
0
0
0
1
2
3
4
5
0
6
1
3
4
5
Fig.16 VLEDC – ILEDC@ ILED is set
200mA by ILED register
0.1
6
-40
PS_DATAOUT [count]
200
140
130
120
110
0
20
40
160
Human hand
ILED=200mA
LED : SIM-030ST
Center to Center : 10mm
between BH1772GLC
and SIM-030ST
160
120
60
80
100
Ta [℃]
80
40
18％ Kodak GrayCard
0
50
100
Object Distance [mm]
200
ILED=200mA
Reflector :
18%Kodak Graycard
Center to Center : 10mm
between BH1772GLC
and Infrared LED
120
80
SIM-030ST
40
PS_DATAOUT [count]
SIM-040ST
150
A=5mm
160
A=20mm
A=30mm
80
60
80
100
LED : SIM-030ST
Reflector :
18%Kodak Graycard
Center to Center : 10mm
between BH1772GLC
and SIM-030ST
120
80
40
ILED=50mA
0
50
100
150
Object Distance [mm]
Fig.21 Object Distance – PS_DATAOUT
of different ILED
ILED=200mA
LED : SIM-030ST
Reflector :
18%Kodak Graycard
Center to Center : A
between BH1772GLC
and Infrared LED
A=10mm
120
40
ILED=100mA
0
Fig.19 PS sensor out
Fig.20 Object Distance – PS_DATAOUT
Temperature Dependency
of different reflector
2
(Irradiance by Proximity object = 324μW/cm )
160
20
ILED=200mA
0
-20
0
Fig.18 VCC – ICC@0 Lx
( POWER DOWN )
90％ White paper
100
-40
-20
Ta [ ℃ ]
Fig.17 VLEDC – ILEDC@ ILED is set
20mA by ILED register
150
PS_DATAOUT [count]
1
VLEDC [V]
VLEDC [V]
PS_DATAOUT [count]
2
PS_DATAOUT [count]
ILEDC[mA]
10
240
A=50mm
A=70mm
40
0
0
0
50
100
Object Distance [mm]
150
Fig.22 Object Distance – PS_DATAOUT
of different Infrared LED
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
0
50
100
150
Object Distance [mm]
Fig.23 Object Distance – PS_DATAOUT
of different distance between
BH1772GLC and SIM-030ST
6/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●I2C bus communication
1) Slave address "0111000"
2) Main write format
1. Case of “Indicate register address”
Slave Address
0111000
ST
W
0
ACK
Indicate register address
010XXXXX
ACK
SP
2. Case of "write to data register after indicating register address"
Slave Address
0111000
ST
Data specified at register address
field
W
0
ACK
ACK
・・・・・・
ACK
Indicate register address
010XXXXX
ACK
Data specified at register address
field + N
ACK
SP
BH1772GLC continues to write data with address increments until master issues stop condition.
Write cycle is 40h - 41h - 42h - 43h - 44h - 45h - 46h – 52h ……… 5Dh – 5Eh - 40h ………
Ex ) If register address field is 45h, then BH1772GLC writes data like seeing in below.
45h - 46h -52h ……… 5Dh – 5Eh - 40h………It is continued until master issues stop condition.
3) Main read format
1. Case of read data after indicate register address and read data ( Master issues restart condition )
Slave Address
0111000
ST
Slave Address
0111000
ST
Data specified at register address
field + 1
2.
W
0
ACK
R
1
ACK
・・・・・・
ACK
ACK
Indicate register address
010XXXXX
ACK
Data specified at register address
field
ACK
Data specified at register
address field + N
NACK
Data specified at register address
field
ACK
Data specified at register address
field + N
NACK
SP
Case of read data after selecting register address
ST
Slave Address
0111000
Data specified at register address
field + 1
R
1
ACK
・・・・・・
ACK
ACK
SP
BH1772GLC outputs data from specified address field until master issues stop condition.
Read cycle is 40h - 41h - 42h - 43h - 44h - 45h - 46h – 4Ah ……… 5Dh – 5Eh - 40h ………
Ex ) If register address field is 4Ch, then BH1772GLC outputs data like seeing in below.
4Ch - 4Dh -4Eh ……… 5Dh – 5Eh - 40h………It is continued until master issues stop condition.
from slave to master
from master to slave
※
※
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
BH1772GLC operates as I2C bus slave device.
Please refer formality I2C bus specification of NXP semiconductors
7/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Block diagram and block explanation
VDD LED
IrLED
VCC
LEDC
Proximity Sensor
LED
Pulse
Gen.
IrLED
Driver
DC light
rejection
Amp
Reflector
GND_LED
Ambient
Light
Linear
ADC
PS
Control
Logic
Linear /
Log
converter
PD_PS
Data
Registers
INT
interface
INT
POR
Timing Controller
OSC
16bit
ADC
ALS
Control
Logic
PD_ALS
I 2C
Interface
SDA
SCL
Ambient Light Sensor
I2C Interface
GND
GNDNC
2
I C bus interface. 1.8V logic interface is supported.
POR
Power on reset function.
OSC
Internal oscillator.
Timing controller
Internal management block for proximity sensor and ambient light sensor.
INT interface
INT terminal control block. Details are on Page 13 - 14
DATA registers
Register for strage of measurement results or commands. Details are on Page 15.
PS control logic
This block controls proximity sensor analog block
LED Pulse Gen
LED current generator. LED current value is configurable by ILED( 42h ) register.
IrLED Driver
IrLED driver block.
PD_ALS
Photo diode for ambient light sensor. Peak wavelength is approximately 550nm.
16bit ADC
AD converter for ALS.
ALS control logic
This block controls ambient light sensor analog block.
PD_PS
Photo diode for proximity sensor. Peak wavelength is approximately 850nm.
DC light rejection Amp
DC light is rejected in this block. And generated Infrared pulse is passed to linear ADC block.
Linear ADC
2
2
AD converter for proximity sensor. Detection range is very wide ( 1μW/cm - 100mW/cm ).
Linear/Log converter
Linear to logarithm converter for proximity sensor. Output data is 8bit.
PS irradiance calculation example is on Page 23.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
8/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Example of application circuit diagram
If you do not use the INT pin, please connect to GND or opening (non connect).
Regarding NC1 and NC2, please connect to VDD_LED or open (non connect).
1) Standard application circuit example
(ex. SIM-030ST(Rohm))
VDD_LED
2.5 - 5.5V
2.3 – 3.6V
IrLED
(ex. 0.1μF)
(ex. 10μF)
1.65 – 5.5V
VCC
6
LEDC
Proximity Sensor
3
NC1
2
NC2
LED
Pulse
Gen
IrLED
Driver
1
DC light
rejection
Amp
Data
PS
Control
Logic
Linear /
Log
converter
Linear
ADC
Registers
INT
INT
interface
5
1.65 - 3.6V
Controller
PD_PS
POR
or
OSC
Timing Controller
Baseband
SCL
I 2C
Interface
ALS
Control
Logic
16bit
ADC
Micro
Processor
8
SDA
9
PD_ALS
Ambient Light Sensor
4
10
7
GND
GND_LED
GNDNC
2) In case of extending proximity sensor detection distance
BH1772GLC can drive maximum 200mA(Typ) current. By adding simple external circuit, it is possible to increase IrLED
current and to extend detection distance. In case of driving large current for IrLED, note that the current value must not be
over the absolute maximum rating for IrLED.
VDD_LED
4.5 - 5.5V
2.3 – 3.6V
1kOhm
(ex. 0.1μF)
(ex. 10μF)
PMOS
1.65 – 5.5 V
VCC
6
LEDC
Proximity Sensor
3
NC1
NC2
2
1
DC light
rejection
Amp
IrLED
(ex. SIM-030ST
(Rohm))
LED
Pulse
Gen
IrLED
Driver
Data
PS
Control
Logic
Linear /
Log
converter
Linear
ADC
Registers
INT
INT
interface
5
1.65 - 3.6V
PD_PS
POR
or
OSC
Timing Controller
Baseband
R1
SCL
I 2C
Interface
ALS
Control
Logic
16bit
ADC
Micro
Controller
8
Processor
SDA
9
PD_ALS
Ambient Light Sensor
4
GND_LED
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
10
7
GND
9/29
GNDNC
2012. 06 - Rev.F
BH1772GLC
Technical note
●Terminal description
PIN
Terminal Name
No.
1
2
Equivalent Circuit
Terminal for internal test.
Non connect or pull up to VDD_LED
( external IrLED anode terminal )
NC1
Terminal for internal test.
Non connect or pull up to VDD_LED
( external IrLED anode terminal )
NC2
3
LEDC
4
GND_LED
Function
Nch open drain LED current output terminal. LED
current and emitting interval is defined by internal
register. Register value is possible to configure by
I2C bus.
GND terminal for LED driver
5
Nch open drain output.
Interrupt setting is defined by internal register.
2
Register value is possible to configure by I C bus.
INT
Power supply terminal
6
VCC
7
GND
GND terminal
2
I C bus Interface SCL terminal
8
SCL
2
I C bus Interface SDA terminal
9
SDA
Non connect or pull down to GND
VCC
10
GNDNC
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
10/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Proximity sensor measurement sequence
2
The below figure shows proximity sensor measurement sequence. First PS measurement is triggered by I C bus master
writes measurement command to PS_CONTROL register ( 41h ).
1. Forced mode
PS measurement is done only 1time and PS trigger bit ( 44h ) is overwritten from 'H' to 'L' after PS measurement
complete. PS measurement is re-started by master writes PS trigger bit to 'H'.
2. Stand alone mode
PS measurement is continuously done until master select the other mode. Measurement interval is defined at
PS_MEAS_RATE register ( 45h ).
start
measurement
LED
start
measurement
LED
PS meas rate
tMPS
twILED
twILED :
tMPS :
LED current pulse duration, please refer P2 ( Electrical Characteristics ).
Proximity sensor measurement time, please refer P2 ( Electrical Characteristics ).
Measurement result is generated in this term.
PS meas rate : In case of stand alone mode, It is defined at PS_MEAS_RATE register ( 45h ).
In case of forced mode, it means the term until overwriting PS trigger bit to ‘H’.
●Ambient light sensor measurement sequence
2
The below figure shows ambient light sensor measurement sequence. First ALS measurement is triggered by I C bus
master writing measurement command to ALS_CONTROL register ( 40h ).
1. Forced mode
ALS measurement is done only 1time and ALS trigger bit( 44h ) is overwritten from 'H' to 'L' after ALS measurement is
completed. ALS measurement is re-started by master writes ALS trigger bit to 'H'.
2. Stand alone mode
ALS measurement is continuously done until master select the other mode. Measurement interval is defined at
ALS_MEAS_RATE register ( 46h ). If ALS rate disable bit ( 46h ) is ‘H’, there is no interval between measurement.
start
measurement
start
measurement
tMALS
ALS meas rate
tMALS :
Ambient light sensor measurement time, please refer P2 ( Electrical Characteristics ).
Measurement result is generated in this term.
ALS meas rate: In case of stand alone mode, It is defined at ALS_MEAS_RATE register ( 46h )
In case of forced mode, it means the term until overwriting ALS trigger bit to ‘H’.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
11/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Interrupt function
Interrupt function compares ALS or PS measurement result to preset interrupt threshold level. PS uses one threshold level or
two threshold level ( in hysteresis mode ) and ALS uses two threshold level (upper and lower ).
Interrupt status is monitored by INT pin or ALS_PS_STATUS register ( 4Eh ) and Interrupt function is able to be controlled by
INTERRUPT register ( 52h ). Interrupt threshold is defined at ALS_TH_UP and ALS_TH_LOW and PS_TH_H and
PS_TH_L registers ( 53h, 56 - 59h, 5Ch ). PS_TH_L registers is effective when PS hysteresis bit ( 52h ) is ‘H’.
Interrupt persistence function is defined at PERSISTENCE register ( 5Bh ).
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.
There are two output modes about interrupt function ( latched mode and unlatched mode ).
In case of using ALS and PS interrupt functions at the same time, latch mode is recommended.
INT terminal is high impedance when VCC is supplied.
INT terminal becomes inactive by setting INTERRUPT register (52h)[1:0] to “00”. ( It is not worked during power down mode.
Power down mode means ALS_CONTROL(40h)=’0’ and PS_CONTROL(41h) = ‘0’.)
INT terminal keeps just previous state which power down command is sent. So to set INT terminal to high impedance is
recommended. VCC current(approximately 25μA at VCC=2.5V) is consumed during INT terminal is ‘L’. There are two
method to set INT terminal to high impedance.
1) Send software reset command. (Write ‘H’ to ALS_CONTROL(40h). Software reset is also worked during power
down. All registers are initialized by software reset command.)
2) Write “000” to INTERRUPT register(52h).
ex1) In case of using only PS ‘H’ threshold ( INTERRUPT register 52h : ‘0’ )
In case of unlatch mode if the measurement value exceeds the PS interrupt threshold ‘H’ value, the interrupt becomes active.
And if the measurement value goes below the threshold, the interrupt becomes inactive.
In case of latch mode once the interrupt becomes active, it keeps the status until end of measurement after INTERRUPT
register is read.
In case of persistence function is set to active, if the interrupt is inactive, it keeps inactive status until the measurement value
is beyond the threshold ‘H’ value continuously. If the interrupt is active, it keeps active status until the measurement value is
below threshold ‘H’ value continuously or until end of measurement after INTERRUPT register is read.
Master reads INTERRUPT register
Latch mode
Unlatch mode
Unlatch mode
persistence = 2
active
inactive
PS interrupt threshold ‘H’ level
Sequential measurement result
time
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
12/29
2012. 06 - Rev.F
BH1772GLC
Technical note
ex2 ) In case of using PS ‘H/L’ threshold ( INTERRUPT register 52h : ‘1’ )
In case of unlatch mode if the measurement value exceeds the PS interrupt threshold ‘H’ value, the interrupt becomes active.
And if the measurement value goes below the threshold ‘L’ value, the interrupt becomes inactive.
In case of latch mode once the interrupt becomes active, it keeps the status until end of measurement after INTERRUPT
register is read.
In case of persistence function is set to active, if the interrupt is inactive, it keeps inactive status until the measurement value
is beyond the threshold ‘H’ value continuously. If the interrupt is active, it keeps active status until the measurement value is
below threshold ‘L’ value continuously or until end of measurement after INTERRUPT register is read.
Master reads INTERRUPT register
Latch mode
Unlatch mode
Unlatch mode
persistence = 2
active
inactive
PS interrupt threshold ‘H’ level
PS interrupt threshold ‘L’ level
Sequential
Sequential measurement
measurement result
result
time
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
13/29
2012. 06 - Rev.F
BH1772GLC
Technical note
ex3 ) Ambient light sensor interrupt function
In case of unlatch mode if the measurement value is within the range set by ALS interrupt threshold ‘H’ and ‘L’ value, the
interrupt becomes inactive. And if the measurement value is out of the range set by threshold ‘H’ and ‘L’ value, the interrupt
becomes active.
In case of latch mode once the interrupt becomes active, it keeps the status until end of measurement after INTERRUPT
register is read.
In case that persistence function is set to active, if the interrupt is inactive, it keeps inactive status until the measurement
value is continuously out of the range set by threshold ‘H’ and ‘L’ value. If the interrupt is active, it keeps active status until the
measurement value is continuously within the range set by threshold ‘H’ and ‘L’ value or until end of measurement after
INTERRUPT register is read.
Master reads INTERRUPT register
Latch mode
Unlatch mode
Unlatch mode
persistence = 2
active
inactive
ALS interrupt threshold ‘H’ level
ALS interrupt threshold ‘L’ level
Sequentialmeasurement
measurementresult
result
Sequential
time
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
14/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Command set
Address
Type
Register name
Register function
40h
41h
RW
RW
ALS_CONTROL
PS_CONTROL
ALS operation mode control and SW reset
PS operation mode control
42h
RW
I_LED
LED current setting
43h
RW
Reserved register 1
-
44h
RW
ALS_PS_MEAS
Forced mode trigger
45h
RW
PS_MEAS_RATE
PS measurement rate
46h
RW
ALS_MEAS_RATE
ALS measurement rate
4Ah
R
Reserved register 2
-
4Bh
4Ch
4Dh
4Eh
4Fh
50h
51h
52h
R
R
R
R
R
R
R
RW
Reserved register 3
ALS_DATA_0
ALS_DATA_1
ALS_PS_STATUS
PS_DATA
Reserved register 4
Reserved register 5
INTERRUPT
ALS data (Low Byte)
ALS data (High Byte)
Measurement data and interrupt status
PS data
Interrupt setting
53h
54h
55h
56h
57h
58h
59h
5Ah
5Bh
5Ch
5Dh
5Eh
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
PS_TH_H
Reserved register 6
Reserved register 7
ALS_TH_UP_0
ALS_TH_UP_1
ALS_TH_LOW_0
ALS_TH_LOW_1
ALS_SENSITIVITY
PERSISTENCE
PS_TH_L
Reserved register 8
Reserved register 9
PS interrupt H threshold
ALS upper threshold low byte
ALS upper threshold high byte
ALS lower threshold low byte
ALS lower threshold high byte
ALS sensitivity setting
INT pin INTERRUPT persistence setting
PS interrupt L threshold
-
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
15/29
2012. 06 - Rev.F
BH1772GLC
Technical note
○ALS_CONTROL ( 40h )
7
RES
6
5
4
3
2
1
0
RES
RES
RES
ALS
Resolution
SW
Reset
ALS mode
default value 00h
Field
Bit
Type
Description
RES
7:4
RW
Write “0000”
ALS Resolution
3
RW
SW reset
2
RW
ALS mode
1:0
RW
○PS_CONTROL ( 41h )
7
X
6
X
Field
NA
PS mode
5
X
0 : H-Resolution mode, 1 lx step output
1 : M-Resolution mode, 4 lx step output
0 : initial reset is not started
1 : initial reset is started
00 : Standby mode
01 : Don’t use.
10 : Forced mode
11 : Stand alone mode
4
X
3
X
Bit
Type
7:2
-
Description
Ignored
1:0
RW
2
X
1
0
PS mode
default value 00h
00 : Standby mode
01 : Don’t use.
10 : Forced mode
11 : Stand alone mode
○I_LED ( 42h )
7
6
5
4
3
Reserved
2
1
0
LED current
default value 1Bh
Field
Reserved
LED current
○Reserved register 1 ( 43h )
7
6
X
X
Bit
Type
7:3
RW
2:0
RW
Description
write “00011”
000 : 5mA
001 : 10mA
010 : 20mA
011 : 50mA
100 : 100mA
101 : 150mA
11X : 200mA
5
4
3
2
X
X
X
Reserved
1
0
default value 03h
Field
Bit
Type
NA
7:3
-
Description
Ignored
Reserved
2:0
RW
000 : 5mA
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
16/29
2012. 06 - Rev.F
BH1772GLC
Technical note
○ALS_PS_MEAS ( 44h )
7
X
6
5
4
3
2
1
X
X
X
X
X
ALS
PS
trigger
trigger
default value 00h
Field
NA
*2
Bit
Type
7:2
-
ALS trigger
1
RW
PS trigger
0
RW
0
Description
Ignored
0 : Ignored
1 : Start ALS measurement at force mode*2
0 : Ignored
*2
1 : Start PS measurement at force mode
Even if trigger is set during measurement, the measurement doesn’t restart. The measurement will start, in case that It
is set to forced mode by ALS_CONTROL register (40h) or PS_CONTROL register (41h) and is not during
measurement.
○PS_MEAS_RATE ( 45h )
7
X
6
X
5
X
4
X
3
2
PS meas rate
1
0
default value 05h
Field
NA
PS meas rate
○ALS_MEAS_RATE ( 46h )
7
6
ALS
rate
disable
Bit
Type
7:4
-
3:0
5
X
RW
4
X
Description
Ignored
0000 : 10ms
0001 : 20ms
0010 : 30ms
0011 : 50ms
0100 : 70ms
0101 : 100ms
0110 : 200ms
0111 : 500ms
1000 : 1000ms
1001 : 2000ms
101X : 2000ms
11XX : 2000ms
3
X
2
X
1
0
ALS meas rate
default value 02h
Field
ALS rate disable
NA
ALS meas rate
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
Bit
Type
Description
7
RW
0 : ALS meas rate( 46h ) is active
1 : ALS meas rate( 46h ) is inactive
6:3
-
2:0
RW
Ignored
000 : 100ms
001 : 200ms
010 : 500ms
011 : 1000ms
1XX : 2000ms
17/29
2012. 06 - Rev.F
BH1772GLC
Technical note
○Reserved register 2 ( 4Ah )
7
6
X
X
5
4
3
2
1
X
X
X
X
X
X
default value 93h
2
X
1
X
0
X
default value 01h
Field
NA
Bit
7:0
○Reserved register 3 ( 4Bh )
7
6
X
X
Type
R
5
X
Field
NA
4
X
Bit
7:0
○ALS_DATA ( 4Ch, 4Dh )
7
6
ALS data
5
Description
Reserved
3
X
Type
R
4
0
Description
Reserved
3
2
1
0
default value 00h
Register
ALS data LSBs
ALS data MSBs
○ALS_PS_STATUS ( 4Eh )
7
ALS
INT
status
6
ALS
data
status
Address
4Ch
4Dh
5
4
3
Reserved
Bit
Type
ALS INT status
7
R
ALS data status
6
R
5:2
R
PS INT status
1
R
PS data status
0
R
Field
Reserved
Bit
7:0
7:0
Type
R
R
2
Description
ALS data Low byte
ALS data High byte
1
0
PS
PS
INT
data
status
status
default value 00h
Description
0 : ALS interrupt signal inactive
1 : ALS interrupt signal active
0 : ALS old data (data is already read)
1 : ALS new data (data is renewed after previous reading)
0 : PS interrupt signal inactive
1 : PS interrupt signal active
0 : PS old data (data is already read)
1 : PS new data (data is renewed after previous reading)
ALS interrupt signal inactive means that ALS measurement result is within threshold level set by ALS_TH register(56h,
57h, 58h, 59h). ALS interrupt signal active means measurement result is out of threshold level set by ALS_TH register.
PS interrupt signal active means PS measurement result exceeds threshold level defined by PS_TH_H register(53h). PS
interrupt signal inactive means PS measurement result does not exceed threshold level set by PS_TH_H register. When
PS interrupt hysteresis( INTERRUPT register 52h) is ‘H’, if once interrupt signal becomes active, it is kept until
measurement result becomes less than PS_TH_L(5Ch) register value.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
18/29
2012. 06 - Rev.F
BH1772GLC
Technical note
○PS_DATA ( 4Fh )
7
6
5
4
3
2
1
0
PS data
default value 00h
Register
PS data
Bit
7:0
○Reserved register 4 ( 50h )
7
6
X
X
4
3
2
1
X
X
X
X
X
Reserved
X
X
Type
R
3
2
1
X
X
X
X
Bit
Type
R
X
default value 00h
Description
4
7:0
0
Reserved
X
Reserved
X
Bit
7:0
5
Field
○INTERRUPT ( 52h )
7
Description
PS measurement data
5
Field
○Reserved register 5 ( 51h )
7
6
Type
R
0
X
default value 00h
Description
Reserved
6
5
4
3
2
1
X
Interru
pt
source
PS
Interrupt
hysteresis
Output
mode
Interrupt
polarity
Interrupt mode
0
default value 08h
Field
Bit
Type
7:6
-
Interrupt source
5
R
PS Interrupt
hysteresis
4
RW
Output mode
3
RW
Interrupt polarity
2
RW
1:0
RW
NA
Interrupt mode
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
Description
Ignored
0 : First interrupt triggered by ALS
1 : First interrupt triggered by PS
0 : Use PS_TH_H only.
1 : Use PS_TH_H and PS_TH_L for hysteresis
0 : INT pin is latched until INTERRUPT register is read.
1 : INT pin is updated after each measurement.
0 : INT pin is logic ‘L’ when interrupt signal is active
1 : INT pin is logic ‘L’ when interrupt signal is inactive
00 : INT pin is inactive.
01 : Triggered by only PS measurement
10 : Triggered by only ALS measurement
11 : Triggered by PS and ALS measurement
19/29
2012. 06 - Rev.F
BH1772GLC
Technical note
○PS_TH_H ( 53h )
7
6
PS H threshold
5
4
3
2
1
0
default value FFh
Register
PS_TH_H
Bit
7:0
Type
RW
Description
PS Interrupt H threshold level
○Reserved register 6 ( 54h )
7
6
Reserved
5
4
3
2
1
0
default value FFh
Field
Reserved
Bit
7:0
Type
RW
Description
write “11111111”
○Reserved register 7 ( 55h )
7
6
Reserved
5
4
3
2
1
0
default value FFh
Field
Reserved
Bit
Type
Description
7:0
RW
write “11111111”
○ALS_TH_UP ( 56h, 57h )
7
6
5
ALS upper threshold data
4
3
2
1
0
default value FFh
Register
Address
Bit
Type
ALS TH upper LSBs
56h
7:0
RW
ALS TH upper MSBs
57h
7:0
RW
○ALS_TH_LOW ( 58h, 59h )
7
6
5
ALS lower threshold data
4
3
2
Description
ALS interrupt upper threshold
(Low byte)
ALS interrupt upper threshold
(High byte)
1
0
default value 00h
Register
Address
Bit
Type
ALS TH lower LSBs
58h
7:0
RW
ALS TH lower MSBs
59h
7:0
RW
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
20/29
Description
ALS interrupt lower threshold
(Low byte)
ALS interrupt lower threshold
(High byte)
2012. 06 - Rev.F
BH1772GLC
Technical note
○ALS_SENSITIVITY ( 5Ah )
7
6
5
4
3
2
1
0
ALS sensitivity data
default value 35h
Register
ALS sensitivity data
○PERSISTENCE ( 5Bh )
7
6
Bit
7:0
5
4
ALS persistence
Type
RW
Description
ALS sensitivity adjustment register（refer to P24）
3
2
1
0
PS persistence
default value 11h
Field
Bit
ALS persistence
PS persistence
7:4
3:0
Type
RW
RW
Description
Persistence for ALS interrupt.
Persistence for PS interrupt.
○PS_TH_L ( 5Ch )
7
6
5
4
3
2
1
0
PS L threshold
default value 00h
Register
PS_TH_L
Bit
7:0
Type
RW
Description
PS Interrupt L threshold level
○Reserved register 8 ( 5Dh )
7
6
Reserved
5
4
3
2
1
0
default value 00h
Field
Reserved
Bit
Type
Description
7:0
RW
write “00000000”
○Reserved register 9 ( 5Eh )
7
6
Reserved
5
4
3
2
1
0
default value 00h
Field
Reserved
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
Bit
7:0
Type
RW
Description
write “00000000”
21/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Current consumption
BH1772GLC can operate ALS and PS individually. Average current consumption is depend on each statuses and
measurement duration
(set by 45h, 46h register). Major elements which decide VCC current consumption are like following table.
Parameter
Symbol
Typ.
Units
ALS part’s current
IccALS
140
μA
Except for ALS/PS common circuit current.
PS part’s current
IccPS
250
μA
Except for ALS/PS common circuit current.
Current flow for 1.4ms
Icc3
6.5
mA
Icccmn
60
μA
PS current
during driving LED
ALS/PS
common ciruit current
1)
Comment
Current consumption in case of operating only ALS
VCC current consumption can calculate according to following formula.
ICC(only ALS) = IccALS * ( 100ms / ALS meas rate ) +Icccmn
For example in case measurement rate is 500ms, the value is as following.
e. g. ) ICC(onlyALS) = 140μA (100ms / 500ms) + 60μA = 88μA
2)
Current consumption in case of operating only PS
VCC current consumption can calculate according to following formula.
ICC(only PS) = IccPS * ( 1.4ms / PS meas rate ) +Icccmn + Icc3 * ( 200μs / PS meas rate )
VDD_LED current consumption can calculate according to following formula.
IVDD_LED = 200μs / PS meas rate
For example in case it drives 50mA and measurement rate is 100ms, the value is as following.
e. g. ) ICC(onlyPS) = 250μA * ( 1.4ms / 100ms ) + 60μA + 6.5mA * ( 200μs / 100ms ) = 76.5μA
IVDD_LED = 50mA * (200μs / 100ms) = 100μA
3)
Current consumption in case of operating ALS and PS at the same time.
VCC current consumption can calculate according to following formula.
ICC( ALS+PS) = Icc(onlyALS) + Icc(onlyPS) - Icccmn
For example in case ALS measurement rate is 500ms and PS measurement rate is 100ms and it drives 50mA, the value
is as following.
e.g. ) ICC(ALS+PS) = 88μA + 76.5μA - 60μA = 104.5μA
VDD_LED current consumption can calculate same as the case of operating only PS.
4)
In case of waiting trigger at forced mode
ALS/PScommon cucuit current （Icccmn） is flow.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
22/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●ALS Measurement mode explanation
Measurement Mode
H-Resolution mode
M-Resolution mode
Measurement Time
typ. 100ms.
typ.16ms.
Resolution
1 Lx
4 Lx
We recommend to use H-Resolution Mode.
Measurement time ( integration time ) of H-Resolution mode is so long that some kind of noise( including in 50Hz / 60Hz
noise ) is rejected. And H-Resolution mode is 1 l x resolution so that it is suitable for darkness.
●Regarding ALS measurement result
ALS measurement result is registered as following format
ALS DATA LSB ( 4Ch )
7
6
7
2
26
5
25
4
24
3
23
2
22
1
21
0
20
ALS DATA MSB ( 4Dh )
7
6
15
14
2
2
5
13
2
4
12
2
3
11
2
2
10
2
1
9
2
0
8
2
ALS Lux calculation example
ALS DATA LSB = ” 1001_0000 ”
ALS DATA MSB = ” 1000_0011 ”
( 215 + 29 + 28 + 27 + 24 ) ≒ 33680 [ lx ]
●Regarding PS measurement result
PS measurement result is converted to logarithm 8bit data and is registered as following format
PS_DATA ( 4Fh )
7
7
2
6
5
4
3
2
1
0
6
5
4
3
2
1
20
2
2
2
2
2
2
The data seeing above register is possible to change the irradiance.
Approximation formula is seeing in below.
Irradiance : 10 ^ (PS_DATA * 0.0197) [μW/cm^2]
PS irradiance calculation example
PS_DATA = ” 1000_0101 ”
10 ^ ( (27 + 22 + 20 ) x 0.0197) = 10^(133 x0.0197) ≒ 417 [ μW/cm^2 ]
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
23/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●ALS sensitivity adjustment function
BH1772GLC 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 ALS_SENSITIVITY(5Ah). For example, sensitivity 2 times when the value of the register is 2
times, and the measurement time 2 times, too.
The range of adjusting ALS_SENSITIVITY is below.
Adjustable range of
ALS_SENSITIVITY
binary
decimal
Min.
0001_1000
(sensitivity: default * 0.45 )
24
(sensitivity: default * 0.45 )
Typ.
0011_0101
default
53
default
Max.
1111_1110
(sensitivity: default * 4.79 )
254
(sensitivity: default * 4.79 )
It is possible to detect 0.21lx by using this function at H-resolution mode.
The below formula is to calculate illuminant per 1 count.
Illuminant per 1 count ( lx / count ) = 1 * 53 / X
53 : Default value of ALS_SENSITIVITY register (decimal)
X : ALS_SENSITIVITY register value (decimal)
Illuminant per 1 count is as following within adjustable range of ALS_SENSITIVITY.
ALS_SENSITIVITY register value
0001_1000
0011_0101
Illuminant per 1count(lx / count)
2.21
1.00
1111_1110
0.21
Please input the opecode at Power Down state to change ALS_SENSITIVITY register. There is a possibility of malfunction
when the opecode to change ALS_SENSITIVITY register is input while the illuminant measurement is on-going
In stand alone mode, if ALS measurement time exceeds the value defined ALS_MEAS_RATE register, ALS_MEAS_RATE
register value is ignored. Next measurement is started immediately after one measurement completion.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
24/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Recommended land pattern
unit : mm
●Optical window design above the device
Sensing area; (0.55mm x 0.55mm)
1.4
Min. 0.55
Min. 0.55
Recommended light receiving area;
Please design the optical window
so that light can cover at least this area.
Min.
0.55
Min.
0.55
unit : mm
1.4
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
25/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●The method of distinguishing 1pin
There is the following methods of distinguishing 1pin.
①
Distinguishing by Pad design of top side.
There are 5 pads in the one side of a top side. There is a space between 2 pads and 3 pads.
②
Distinguishing by Die pattern.
1Pin
2 pads
A
①
C
3 pads
②Die pattern
Top View
③
Distinguishing by Pad design of bottom side.
1Pin
Bottom View
Pad of 1pin cuts the corner.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
26/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Power on reset function
BH1772GLC has power on reset function. By operating this function, all of registers are reset when the power is supplied.
Please note followings and design the application.
①
Power on time : t1
BH1772GLC becomes operational after 2ms since VCC voltage crosses 1.9V from being less than 0.4V.
②
Power off time : t2
Before the power is supplied, VCC voltage should be less than 0.4V at least for 1ms.
1.9V
VCC
0.4V
t1
t2
t1
BH1772GLC
Don’t care
active
Don’t care
active
*”active state” means that BH1772GLC is correctly operational.
INT terminal is high impedance when VCC is supplied.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
27/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Cautions on use
1)
Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage ( Vccmax, VSDAmax, VSCLmax, VINTmax,
VGNDNCmax, VLEDCmax ), 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 and GND_LED terminal so that they 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. In addition, apply to the
input terminals a voltage 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.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
28/29
2012. 06 - Rev.F
BH1772GLC
Technical note
●Ordering part number
B
H
1
Part No.
7
7
2
G
Part No.
L
C
Package
GLC: WLGA010V28
-
E
2
Packaging and forming specification
E2:Embossed tape and reel
WLGA010V28
2.8±0.1
2.65±0.1(MOLD)
0.9± 0.1 2.65±0.1(MOLD)
2.8± 0.1
8
Top View
1
4
9
6
Tape
Embossed carrier tape (with dry pack)
Quantity
3000pcs
Direction
of feed
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
S
0.08 S
Bottom View
0.5
0.4 1.0
9
0.35 0.7 0.7 0.7 0.35
0.2
0.4 0.4
0.4
2.0
2.8± 0.1
0.2
1
6
0.5
0.4
2.8±0.1
4
1.0 0.4
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
1pin
(Unit : mm)
Reel
29/29
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2012. 06 - Rev.F
Datasheet
Notice
Precaution on using ROHM Products
1.
Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
(Note 1)
, transport
intend to use our Products in devices requiring extremely high reliability (such as medical equipment
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU
CHINA
CLASSⅢ
CLASSⅡb
CLASSⅢ
CLASSⅢ
CLASSⅣ
CLASSⅢ
2.
ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3.
Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4.
The Products are not subject to radiation-proof design.
5.
Please verify and confirm characteristics of the final or mounted products in using the Products.
6.
In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7.
De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual
ambient temperature.
8.
Confirm that operation temperature is within the specified range described in the product specification.
9.
ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Precaution for Mounting / Circuit board design
1.
When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2.
In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the
ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
Precautions Regarding Application Examples and External Circuits
1.
If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2.
You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
Precaution for Storage / Transportation
1.
Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2.
Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3.
Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4.
Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
Precaution for Foreign Exchange and Foreign Trade act
Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,
please consult with ROHM representative in case of export.
Precaution Regarding Intellectual Property Rights
1.
All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable
for infringement of any intellectual property rights or other damages arising from use of such information or data.:
2.
No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the information contained in this document.
Other Precaution
1.
This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
2.
The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
3.
In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.
4.
The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
General Precaution
1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s
representative.
3.
The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or
liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or
concerning such information.
Notice – WE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.001
工商网监
湘ICP备2023018690号
