UPD3778 datasheet(11/24 Pages) NEC

11 / 24 page

µPD3778

Data Sheet S14374EJ1V0DS00

DEFINITIONS OF CHARACTERISTIC ITEMS

Saturation voltage: Vsat

Output signal voltage at which the response linearity is lost.

Saturation exposure: SE

Product of intensity of illumination (IX) and storage time (s) when saturation of output voltage occurs.

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.

Average dark signal: ADS

Average output signal voltage of all the valid pixels at light shielding. This is calculated by the following formula.

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.

DC level

VOUT

∆x

ADS

DSNU

DC level

VOUT

PRNU (%) =

x =

xj : Output voltage of valid pixel number j

∆x

∆x : maximum of xj − x 

10600

j=1

10600

× 100

ADS (mV) =

dj : Dark signal of valid pixel number j

10600

j=1

10600

dj : Dark signal of valid pixel number j

DSNU (mV) : maximum of

dj − ADS j = 1 to 10600

UPD3778 Datasheet(PDF) 11 Page - NEC