UPD3794 查看數據表（PDF） - NEC => Renesas Technology

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UPD3794

2700 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR

NEC => Renesas Technology 

µPD3794

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 × 100

x

∆x : maximum of xj − x 

2700

Σ xj

j=1

x=

2700

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.

2700

Σ dj

j=1

ADS (mV) =

2700

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.

DSNU (mV) : maximum of dj − ADS j = 1 to 2700

dj : Dark signal of valid pixel number j

VOUT

Register Dark

DC level

ADS

DSNU

12

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