TC236 Datasheet, PDF (11/15 Pages) Texas Instruments – 680-×500-PIXEL CCD IMAGE SENSOR

TC236
680- × 500-PIXEL CCD IMAGE SENSOR
SOCS043A – JUNE 1994 – REVISED NOVEMBER 1994
electrical characteristics over recommended operating range of supply voltage, T_A = –10°C to 45°C
Dynamic range (see Note 2)
PARAMETER
With CDS‡
Without CDS‡
MIN TYP†
68
69
57
58
MAX
70
59
UNIT
dB
Charge conversion factor
20
µV/e
Charge-transfer efficiency (see Note 3)
0.9999 0.99995
1
Signal-response delay time, τ (see Note 4)
TBD
ns
Gamma (see Note 5)
1
Output resistance
Noise-equivalent signal
With CDS‡
Without CDS‡
300
400
500
Ω
8.5
10
12
electrons
30
36
42
ADB (see Note 6)
TBD
Rejection ratio
SRG (see Note 7)
TBD
dB
ABG (see Note 8)
TBD
Supply current
5
10 mA
IAG1, IAG2
2000
Input capacitance, Ci
SRG
RST
70
pF
10
SAG
4000
† _{All typical values are at TA = 25°C.}
‡ _{CDS = Correlated double sampling, a signal-processing technique that improves noise performance by subtraction of reset noise.}
NOTES: 2. Dynamic range is – 20 times the logarithm of the mean noise signal divided by saturation output signal.
3. Charge-transfer efficiency is one 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 pulse and the output-signal valid state.
5. Gamma (γ) is the value of the exponent is 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 b 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.
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