TC236P Datasheet, PDF (6/17 Pages) Texas Instruments – 680-×500-PIXEL CCD IMAGE SENSOR

TC236P
680- × 500-PIXEL CCD IMAGE SENSOR
SOCS055A – JUNE 1996 – REVISED APRIL 1997
spurious nonuniformity specification
The spurious nonuniformity specification of the TC236P is based on several sensor characteristics:
• Amplitude of the nonuniform pixel
• Polarity of the nonuniform pixel
– Black
– White
• Column amplitude
The CCD sensor is characterized in both an illuminated condition and a dark condition. In the dark condition,
the nonuniformity is specified in terms of absolute amplitude as shown in Figure 4. In the illuminated condition,
the nonuniformity is specified as a percentage of the total illumination as shown in Figure 5.
The specification for the TC236P is as follows:
WHITE SPOT
(DARK)
x < 15 mV
WHITE SPOT
(ILLUMINATED)
x < 30%
LOW-LEVEL
WHITE SPOT
(OVER 3.5 mV)
x < 1000
PEAK WHITE
BLEMISH
(OVER 3 mV)
None
OPTICAL
GRAININESS
None
COLUMN
(DARK)
x < 0.5 mV
BLACK SPOT
(ILLUMINATED)
x < 30%
The conditions under which this specification is defined are as follows:
1. The integration time is 1/60 second except for illuminated white spots and illuminated black spots; and
in these cases, the integration time is 1/240 second.
2. The temperature is 45°C.
3. The CCD video-output signal is 60 mV ± 10 mV.
mV
Amplitude
% of Total
Illumination
t
Figure 4. Pixel Nonuniformity,
Dark Condition
t
Figure 5. Pixel Nonuniformity,
Illuminated Condition
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