IA2008-MB20A Contact image sensor heads Monochrome image sensor head (8pixel / mm) IA2008-MB20A The IA2008-MB20A is a state-of-the-art compact, lightweight A4-size monochrome image sensor head that resulted from the combination of ROHM’s LSI circuit technology and thermal printhead mounting technology. zApplications Facsimiles Image scanning devices zFeatures 1) The amplifiers, resistors, capacitors, and other discrete components that were normally externally attached, are built into the sensor IC. 2) Compact body and lightweight achieved by the placement of the LED light source and sensor IC on the same board. 3) Uses a special ROHM developed prism that provides superior light gathering characteristics and uniform light dispersion. 4) Uses a ceramic board as the base board for minimal temperature fluctuations and uniform thermal dispersion. 5) This is excellent in the point of γ (gamma) characteristics, and it realizes clear gradation. (Exceptionally clear print quality is given by all bits conpensation in the both case of dark output and white output.) zExternal dimensions (Units : mm) 4-φ1.9 Effective Depth7 (0.16) 13±0.3 17.5±0.3 10.5±0.5 3.75±0.5 Paper Feed Direction (6) 2.25±0.2 No.1 Pixel 232±0.5 216 (Effective Reading Width : 212) (13.8) (25) Notes : 1. Curvature of glass surface : With the A-direction positive, 0 to 0.22 with respect to the cover glass. 2. The frame material is UL94V-0. (Connecter part number) Socket Housing : IL-Z-7S-S125C3 (JAE) Socket Contact : IL-Z-C3-A-15000 (JAE) (49.5) (1.41) No.7 (10.4) No.1 Max.2 11.18±0.3 5.5±0.5 (133) A PIN No. No.1 No.2 No.3 No.4 No.5 No.6 No.7 SIGNAL Ao GND VDD SI CLK GLED VLED IA2008-MB20A Contact image sensor heads zCharacteristics Symbol Typ. Unit Effective scanning width − 212 mm Primary scan dot density − 8 pixel / mm Total dot number − 1728 dots Power supply voltage VDD 5 V Scanning speed SLT 5 ms / line kHz Parameter Clock frequency CLK 500 Maximum dynamic range VRmax 1.6 V Dark output Vodmax 550 mV − 5~45 °C Operating temperature zPin assignments No. Circuit I/O Functions 1 AO O Analog output 2 GND I Ground 3 VDD I Power supply 4 SI I Serial-in 5 CLK I Clock 6 GLED I LED ground 7 VLED I LED power supply IA2008-MB20A Contact image sensor heads zTiming chart (a) CLK Timing Chart 1/fCLK tw1 tw2 0 CLK 1 11 12 13 tSETUP tHOLD SI ts Ao 1pixel Fig.1 (b) Data Output Timing Chart After turning on the SI pulse, the analog output shape starts from the setting up point of 12CLK pulse. 0 2 4 6 8 10 12 14 16 CLK SI 1 2 3 4 5 Ao Note) The CLK section area which is over the effective pixel numbers (Output blank part) cannot be used as the analog Output standard level. 2pixel IA2008-MB20A Contact image sensor heads zEquivalent circuit 1 VDD 1728 0.1µF×2 GND AO SI 1728 BIT SHIFT REGISTER CLK VLED GLED Fig.2