BH1721FVC-TR Rohm Semiconductor, BH1721FVC-TR Datasheet - Page 9

• Manufacturer Part Number: BH1721FVC-TR
• Description: Industrial Optical Sensors Ambient Light Sensor Digital 16bit Serial
• Manufacturer: Rohm Semiconductor
• Type: Ambient Light Sensor with Digital Outputr

Specifications of BH1721FVC-TR

• Product: Ambient Light Sensor
• Wavelength: 560nm
• Output Type: I²C™
• Package / Case: SOT-665
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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BH1721FVC
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Rise time of power supply: 100µs or less
ex 4) LPF using CR is inserted between VCC and DVI.
◆ Example of designing set when CR ( C = 1µF, R = 1kΩ ) is inserted between VCC and DVI with VCC=2.8V
①The rise time to 0→2.4V of VCC must use the power supply of 100µs or less.
②Please wait 25ms or more after VCC turn off ( VCC <= 0.05V ), because it is necessary to secure reset section
This method has the possibility that the Reset section of turning on the power supply can not satisfied. Cannot be
satisfied. Please design the set considering the characteristic of the power supply enough.
◆ Notes when CR is inserted between VCC and DVI
※Please note that there is a possibility that reset section ( 1µs ) can not be satisfied because the power supply is turned on when the rise time of VCC is slow
※When VCC is turned off, the DVI voltage becomes higher than VCC voltage but IC destruction is not occred if recommended constant
※Please note that there is a possibility that Reset section (1µsec) cannot be satisfied if wait time is not enough long after turning off VCC.
(1µs or more).
0V
( R1 = 1kΩ, C1 = 1µF ) is used.
(It is necessary to consider DVI voltage level after turning off VCC.)
t1
2.8V
0V
* Please do the application design to secure Reset section 1µs or more after the reclosing of the power supply.
* Please do the application design to secure Reset section 1µs or more after the reclosing of the power supply.
0.1µF
0V
0.05V
BH1721FVC
GND
SDA
VCC SCL
0.1µF
Time to power supply reclosing: 25ms or more
DVI
t2
9/15
R1 : 1kΩ
C1 : 1µF
Reset Section: 1µs or more
0.4V
2.4V
Reset Section: 1µs or more
2.4V
0.4V
Technical Note
2010.02 - Rev.A
VCC
DVI
VCC
DVI