TC237B Datasheet, PDF (12/15 Pages) Texas Instruments – 680-×500-PIXEL CCD IMAGE SENSOR

TC237B
680- × 500-PIXEL CCD IMAGE SENSOR
SOCS063 – APRIL 2001
optical characteristics, T_A = 40°C (unless otherwise noted)
PARAMETER
MIN
TYP
MAX UNIT
Sensitivity (see Note 9)
No IR filter
With IR filter
256
mV/lux
32
Saturation signal, Vsat (see Note 10) Antiblooming disabled
TA =45°C
320
mV
Maximum usable signal, Vuse
Antiblooming enabled
TA =45°C
120
mV
Blooming overload ratio (see Note 11)
500
Image area well capacity
22K
30K
38K electrons
Smear (see Note 12)
Dark current
Dark signal
Dark-signal uniformity
Dark-signal shading
Spurious nonuniformity
Column uniformity
Dark
Illuminated, F#8
See Note 13
TA = 21°C
TA = 45°C
TA = 45°C
TA = 45°C
TA = 45°C
TA = 45°C
– 78
0.05
1
0.5
0.5
10
15
0.5
dB
nA/cm2
mV
mV
mV
mV
%
mV
Electronic shutter capability
1/50,000
1/60
s
NOTES: 9. Theoretical value
10. Saturation is the condition in which further increase in exposure does not lead to further increase in output signal.
11. Blooming is the condition in which charge is induced in an element by light incident on another element. Blooming-overload ratio
is the ratio of blooming exposure to saturation exposure.
12. Smear is a measure of the error introduced by transferring charge through an illuminated pixel in shutterless operation. It is
equivalent to the ratio of the single-pixel transfer time to the exposure time using an illuminated section that is 1/10 of the image-area
vertical height with recommended clock frequencies.
13. The exposure time is 16.67 ms, the fast-dump clocking rate during vertical transfer is 12.5 MHz, and the illuminated section is 1/10
the height of the image section.
TYPICAL CHARACTERISTICS
TC237B Spectral Responsivity
16.6 ms T-int (diagonal lines represent QE)
0.4
60%
40%
0.2
DATA
20%
Responsivity [A/W]
0
400 500 600 700 800 900 1000 1100
Wavelength [nm]
Figure 9. Spectral Characteristics of the TC237B CCD Sensor
12
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