BD6086GU_11 Datasheet, PDF (67/81 Pages) Rohm – 13LEDs ALC* Flash and Illumination

BD6086GU
3. I/V conversion
Gain switching function is built in to extend the dynamic range.
Effective / non-effect of automatic gain control are register setup.
GC1 and the output logic of GC2 can be set up by the manual
at the time of automatic gain control invalid.
Bit ：GAIN (1:0)
Technical Note
No Gain
control
Gain control
ex1(BH1600FVC and connection)
SBIAS
ex3
SBIAS
Ambient light
ex3
SBIAS
Application
circuit
VCC _IOUT
BH1600
GC1
GND ^GC2
SSENS
GC1
GC2
SGND
SSENS
GC1
GC2
SGND
Resistance is a relative valu
SSENS
GC1
GC2
SGND
Operation mode Automatic
Manual
Automatic
Manual
Fixation
GAIN(1:0)
00
01
10
00
01
00
01
GC1 output
HL
H
L
HL
H
L
L
GC2 output
LH
L
H
LH
L
H
L
Sensor
Application
Automatic High
Low Automatic High Low
-
Gain state
Auto Luminous control operates as Low Gain as High Gain at the time of "10" when GAIN (1:0) is "01."
(*1) Please set the relative ratio of resistance. In this case, be careful of the difference in brightness conversion in High Gain mode and Low Gain mode.
4. AD conversion
・Detection of Ambient light information is periodically performed for low-power realization.
Bit : ADCYC(1:0)
・The current which turns off SBIAS and ADC and is generated by the sensor is controlled except the time of Ambient light
measurement.
・SBIAS output equips with intermittent operation mode and always ON-mode. Pull-down [ SBIAS and a SSENS terminal ]
inside at the time of OFF.
Bit : SBIASON
ALCEN
A D C C ycle
S B IA S O utput
ADC Movem ent
GC1, GC2
AM B(3:0)
AD C YC (1:0)
T w ait= 64m s(typ)
W hen SBIASO N =1
T AD = 16.4m s(typ)
GC1, GC2=00
T A M B = 80.4m s(typ)
AM B (3:0)
A D start signal
T A D one= 1.024m s(typ)
16 tim es m easurem ent
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2011.04 - Rev.A