TC221 Datasheet, PDF (11/14 Pages) Texas Instruments – SMALL-FORMAT CCD IMAGE SENSORS

TC221, TC225, TC227
SMALL-FORMAT CCD IMAGE SENSORS
SOCS037C – DECEMBER 1991 – REVISED AUGUST 1997
electrical characteristics over recommended operating ranges of supply voltage and operating
free-air temperature (unless otherwise noted)
PARAMETER
MIN TYP†
MAX UNIT
Dynamic range (see Note 2)
60
dB
Charge-conversion factor
9.5
µV/e
Charge-transfer efficiency (see Note 3)
0.99990
1.00000
Signal-response delay (see Note 4)
30
ns
Gamma (see Note 5)
0.90
1.0
Noise-equivalent signal (KTC noise without CDS circuit)
36
e
Output resistance
600 Ω
ADB (see Note 6)
– 20
Rejection ratio
SRG (see Note 7)
– 40
dB
ABG (see Note 8)
– 50
Supply current
5 mA
IAG
600
Input capacitance, Ci (TC221)
SRG
ABG
20
pF
240
IAG
1320
Input capacitance, Ci (TC225)
SRG1, SRG2
TRG
40
pF
60
ABG
520
IAG
200
Input capacitance, Ci (TC227)
SRG
ABG
10
pF
100
† _{All typical values are at TA = 25°C.}
NOTES: 2. Dynamic range is – 20 times the logarithm of the mean-noise signal divided by the saturation-output signal.
3. Charge-transfer efficiency is 1 minus the charge loss per transfer in the output register. The test is performed in the dark using an
electrical-input signal.
4. Signal-response delay time is the time between the falling edge of the SRG clock pulse and the output-signal valid state.
5. Gamma (γ) is the value of the exponent in the equation below for two points on the linear portion of the transfer-function curve (this
ǒ Ǔ + ǒ Ǔ value represents points near saturation):
g
Exposure (2)
Output signal (2)
Exposure (1)
Output signal (1)
6. ADB rejection ratio is – 20 times the logarithm of the ac amplitude at the output divided by the ac amplitude at ADB.
7. SRG rejection ratio is – 20 times the logarithm of the ac amplitude at the output divided by the ac amplitude at SRG.
8. ABG rejection ratio is – 20 times the logarithm of the ac amplitude at the output divided by the ac amplitude at ABG.
optical characteristics, T_A = 25°C, integration time = 16.67 ms (unless otherwise noted)
PARAMETER
MIN
TYP
MAX UNIT
Sensitivity (see Note 9)
No IR Filter
With IR Filter
210
mV/lx
30
Saturation signal (see Note 10)
350
380
400 mV
Maximum usable signal
170
190
200 mV
Blooming overload ratio (see Note 11)
5
Image-area well capacity
40
ke
Dark current
Dark signal uniformity
Shading
TA = 21°C
TA = 45°C
Output signal = 100 mV
0.27
nA/cm2
10 mV
20%
NOTES: 9. Sensitivity is measured at a source temperature of 2856 K. A 1-mm CM-500 filter is used.
10. Saturation is the condition in which further increase in exposure does not lead to further increase in output signal.
11. Blooming-overload ratio is the ratio of blooming exposure to saturation exposure.
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