µPD3720A
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 (IX) 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
x
× 100
∆x : maximum of xj − x
2700
Σ xj
j=1
x=
2700
xj : Output voltage of valid pixel number j
VOUT
x
Register Dark
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.
2700
Σ dj
j=1
ADS (mV) =
2700
dj : Dark signal of valid pixel number j
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