TC237 Datasheet, PDF (12/15 Pages) Texas Instruments – 680- × 500-pixel ccd image sensor

TC237
680- × 500-PIXEL CCD IMAGE SENSOR
SOCS044B – JUNE 1994 – REVISED JUNE 1996
optical characteristics, T_A = 40°C, integration time = 16.67 ms (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)
Maximum usable signal, Vuse
Blooming overload ratio (see Note 11)
Antiblooming disabled
Antiblooming enabled
390
mV
180
mV
1000
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 dB
0.05 nA/cm2
1 mV
0.5 mV
0.5 mV
10 mV
15
%
0.5 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
0.50
16
14
0.40
12
0.30
10
.9
8
0.20 ^.8
.7
6
.6
.5
4
0.10 .4
.3
.2
2
.1
0.00
0
300 400 500 600 700 800 900 1000 1100
Wavelength (nm)
Figure 9. Spectral Characteristics of the TC237 CCD Sensor
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