UPD8870 Datasheet, PDF (12/24 Pages) NEC – 10680 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR

µ PD8870
DEFINITIONS OF CHARACTERISTIC ITEMS
1. Saturation voltage : Vsat
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.
PRNU (%) = ^{∆ x} × 100
x
∆ x : maximum of xj − x 
10680
Σ ^xj
j=1
x=
10680
xj : Output voltage of valid pixel number j
VOUT
Register Dark
x
DC level
∆x
4. Average dark signal : ADS
Average output signal voltage of all the valid pixels at light shielding. This is calculated by the following
formula.
10680
Σ ^dj
j=1
ADS (mV) =
10680
dj : Dark signal of valid pixel number j
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Data Sheet S15328EJ2V0DS