UPD8670A Datasheet, PDF (16/28 Pages) NEC – 7400 PIXELS CCD LINEAR IMAGE SENSOR

µ PD8670A
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 
7400
Σ ^xj
j=1
x=
7400
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.
ADS (mV) =
7400
Σ ^dj
j=1
7400
dj: Dark signal of valid pixel number j
16
Data Sheet S17147EJ1V0DS