PD8827B_15 Datasheet, PDF (16/26 Pages) Renesas Technology Corp – 7500 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR

μ PD8827B
DEFINITIONS OF CHARACTERISTICS
1. Saturation voltage: Vsat
The output signal voltage at which the response linearity is lost
2. Saturation exposure: SE
Product of intensity of illumination (lx) and storage time (s) when saturation of output voltage occurs
3. Photo response non-uniformity: PRNU
The output signal non-uniformity of all the valid pixels when the photosensitive surface is applied with the light of
uniform illumination. This is calculated by the following formula, and it is defined by each six of them.
Δx
PRNU (%) =
× 100
x
VOUT
3750
Σ xj
j=1
x=
3750
Δx : maximum of | xj − x |
xj : Output voltage of valid pixel number j
x
Register Dark
DC level
Δx
4. Average dark signal: ADS
Average output signal voltage of all the valid pixels at light shielding. This is calculated by the following formula, and
it is defined by each six of them.
ADS (mV) =
3750
Σ dj
j=1
3750
dj : Dark signal of valid pixel number j
5. Dark signal non-uniformity: DSNU
Absolute maximum of the difference between ADS and voltage of the highest or lowest output pixel of all the valid
pixels at light shielding. This is calculated by the following formula, and it is defined by each six of them.
DSNU (mV) : maximum of | dj − ADS | j = 1 to 3750
dj : Dark signal of valid pixel number j
VOUT
Register Dark
DC level
ADS
DSNU
6. Output impedance: ZO
Impedance of the output pins viewed from outside
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Data Sheet S20022EJ1V1DS