NOIL2SM1300A-GWC ON Semiconductor, NOIL2SM1300A-GWC Datasheet - Page 34

• Manufacturer Part Number: NOIL2SM1300A-GWC
• Manufacturer: ON Semiconductor

Specifications of NOIL2SM1300A-GWC

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Full Frame Mode
Figure 18 on page 24 is read out. Figure 33 shows the
Off Chip Automatic Black Level Calibration
two dummy columns, six grey columns, and eight black
columns. The grey column values are used to perform off
chip black level calibration to maintain a constant black
level against any type of drift. These values gauge the
response of normal pixels in the dark conditions.
integration time (black timer register) to the columns. Black
columns share the same minimal integration time;
additionally, the pixels in that column are shielded. Grey
columns can be used if the integration time is large
compared to the minimal integration time. Black columns
are used if the integration time is in the same order of
magnitude as the minimal integration time.
In this operation mode, the entire sensor shown in
The last time slot not only contains valid pixels but also
Grey columns are generated by applying a minimal
The procedure is as follows:
1. Decide what digital code should be the desired
black level. 0x00 cannot be chosen to avoid
underflow in FPN correction.
Data channel
Sync Channel
Data channel
Sync Channel
Data Channel
Sync Channel
Data Channel
Sync Channel
Sequencer
internal state
Sequencer
internal state
Figure 34. Full Frame Mode Readout with On Chip Black Level Calibration Disabled
FOT ROT
FOT ROT
T
T
T
T
timeslot
FS
FS
timeslot
1
1
black
black
Figure 33. Full Frame Mode Readout
D
D
timeslot
D
D
timeslot
ROT
ROT
2
2
D
D
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line 0
line 0
timeslot
D
D
timeslot
3
3
D
D
34
ROT
ROT
internal state of the sequencer, and the behavior of the data
and sync channels (overview and detail of one line).
line 1
line 1
♦
♦
2. Set the sensor to safe settings; DACVREFADC
3. Read-out the grey (or black) columns.
4. Calculate the average value of this grey (or black)
5. Adapt the DACVREFADC if the calculated value
6. Repeat the procedure for temperature changes.
read out without clipping.
including dc-shifts due to Vt and temperature
differences.
Make sure that the grey (or black) columns can be
Make sure that this is the case for every sensor
must be on a value that never clips the grey (or
black) columns.
data; also average it out over the different grey
columns.
deviate from the desired black level value and
return to step (2).
timeslot
D
D
timeslot
53
line
53
line
1022
1022
D GB LE CR
D
D
timeslot
ROT
ROT
timeslot
54
54
LE CR
line
line
1023
1023
timeslot
timeslot
C
C
CRC
CRC
T
T
T
T