TC221, TC225, TC227

SMALL-FORMAT CCD IMAGE SENSORS

SOCS037C – DECEMBER 1991 – REVISED AUGUST 1997

11

POST OFFICE BOX 655303

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

20

pF

ABG

240

IAG

1320

Input capacitance Ci (TC225)

SRG1, SRG2

40

pF

Input capacitance, Ci (TC225)

TRG

60

pF

ABG

520

IAG

200

Input capacitance, Ci (TC227)

SRG

10

pF

ABG

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

value represents points near saturation):

Exposure (2)

Exposure (1)

g

+

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. ABG rejection ratio is – 20 times the logarithm of the ac amplitude at the output divided by the ac amplitude at ABG.

PARAMETER

MIN

TYP

MAX

UNIT

Sensitivity (see Note 9)

No IR Filter

210

mV/lx

Sensitivity (see Note 9)

With IR Filter

30

mV/lx

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

TA = 21°C

0.27

nA/cm2

Dark signal uniformity

TA = 45°C

10

mV

Shading

Output signal = 100 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.