13

µPD3725A

DEFINITIONS OF CHARACTERISTIC ITEMS

1.

Output signal voltage at which the response linearity is lost.

2.

Saturation exposure: SE

3.

Photo response non-uniformity: PRNU

The peak/bottom ratio to the average output voltage of all the valid bits calculated by the following formula.

4.

Average dark signal: ADS

Output average voltage in light shielding

5.

Dark signal non-uniformity: DSNU

The difference between peak or bottom output voltage in light shielding and ADS.

6.

Output pin impedance viewed from outside.

7.

Response: R

Output voltage divided by exposure (Ix•s).

Note that the response varies with a light source.

PRNU(%)=

x 100

n: Number of valid bits

n

j=1

–1

1

n

n

ADS(mV) =

j=1

1

n

Register Dark

DC level

S

n

j=1

1

n

Register Dark

DC level

ADS

DSNU MIN.

DSNU MAX.