參數(shù)資料
型號： IBIS4-6600-M-1
廠商： Cypress Semiconductor Corp.
英文描述： High resolution 6.6 M Pixel Rolling shutter CMOS Image sensor
中文描述： 高像素分辨率6.6米，卷簾門的CMOS圖像傳感器
文件頁數(shù)： 18/63頁
文件大?。?/td> 1286K
代理商： IBIS4-6600-M-1
IBIS4-6600
Datasheet
3.5.4 Offset DACs
Cypress Semiconductor Corporation
Contact: info@Fillfactory.com Document #: 38-05708 Rev.**(Revision 1.3 ) Page 18 of 63
3901 North First Street
San Jose, CA 95134
408-943-2600
Figure 10 shows how the DAC registers influence the black reference voltages of the
two different channels. The offset is mainly given through DAC_raw. DAC_fine can
be used to shift the reference voltage of bus 2 up or down to compensate for different
offsets in the two channels.
DAC_raw
D
AC
_
RAW
_
REG
<0:7>
out
DAC_fine
VDDA
out
10K
200K
50K
50K
10K
200K
blackref
bus1
blackref
bus2
GNDA
D
AC
_
FINE
_
REG
<0:7>
rcal
rcal
pad
RCAL
_
DAC
_
OUT
floating
RCAL
VCAL
+
Figure 10: Offset for the two channels through DAC_raw and DAC_fine
Assume that V
outfull
is the voltage that depends on the bit values that are applied to the
DAC and ranges from
)
11111111
(
)
2
1
1
)
00000000
(
0
:
8
values
bit
VDDA
values
bit
V
outfull
→
Externally, the output range of DAC_raw can be changed by connecting a resistor R
cal
to R
CAL
_
DAC
_
OUT
and applying a voltage V
cal
. The output voltage V
out
of DAC_raw
follows relation (R = 10 k
)
cal
cal
outfull
cal
cal
out
V
R
R
R
+
V
R
R
R
R
2
V
+
+
+
=
2
Special case: R
cal
=
∞
then V
out
= V
outfull
(e.g. for DAC_fine)
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