TC237B Datasheet, PDF (11/15 Pages) Texas Instruments – 680-×500-PIXEL CCD IMAGE SENSOR

TC237B
680- × 500-PIXEL CCD IMAGE SENSOR
SOCS063 – APRIL 2001
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
Dynamic range (see Note 2)
PARAMETER
With CDS^‡§
Without CDS^‡§
MIN TYP^†
64
58
MAX UNIT
dB
59
Charge conversion factor
Charge transfer efficiency (see Note 3)
13
0.9999 0.99995
µV/e
1
Signal response delay time, τ (see Note 4)
12.5
ns
Gamma (see Note 5)
1
Output resistance
Amplifier noise equivalent signal
With CDS^‡
Without CDS^‡
300
400
500
Ω
15
18
21
electrons
30
36
42
ADB (see Note 6)
20
Rejection ratio
SRG (see Note 7)
ODB (see Note 8)
45
dB
25
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.}
§ _{Performance depends on the particular implementation of the CDS technique and on the selected filter bandwidth that precedes sampling.}
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 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 in the equation below for two points on the linear portion of the transfer function curve (this
value represents points near saturation).
ǒ Ǔ ǒ Ǔ ^g
Exposure (2)
Exposure (1)
+
Output signal (2)
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. ODB rejection ratio is – 20 times the logarithm of the ac amplitude at the output divided by the ac amplitude at ODB.
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