2700 PIXELS × 3 COLOR CCD LINEAR IMAGE SENSOR

The µPD3794 is a color CCD (Charge Coupled Device) linear image sensor which changes optical images to electrical signal and has the function of color separation.

The µPD3794 has 3 rows of 2700 pixels, and each row has a single-sided readout type of charge transfer register. And it has reset feed-through level clamp circuits, a clamp pulse generation circuit, an RGB selector and voltage amplifiers. Therefore, it is suitable for 300 dpi/A4 color image scanners, color facsimiles and so on.

FEATURES

• Valid photocell : 2700 pixels × 3

• Photocells pitch : 8 µm

• Line spacing : 32 µm (4 lines) Green line-Blue line, Blue line-Red line

• Color filter : Primary colors (red, green and blue), pigment filter (with light resistance 107 lx•hour)

• Resolution : 12 dot/mm A4 (210 × 297 mm) size (shorter side)

300 dpi US letter (8.5” × 11”) size (shorter side)

• Drive clock level : CMOS output under 5 V operation

• Data rate : 4 MHz MAX.

• Power supply : +12 V

• On-chip circuits : Reset feed-through level clamp circuits

Clamp pulse generation circuit

RGB selector

Voltage amplifiers