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| Diagonal 9.04 mm (Type 1/1.8) 5.13M-Pixel CCD Image Sensor for High-Resolution Digital Still Cameras ICX452AQ ICX452AQF The needs for higher pixel counts and further miniaturization are increasing in the digital still camera market that has been experiencing rapid and continuous growth for several years. Sony has now developed the ICX452AQ/AQF diagonal 9.04 mm (Type 1/1.8) 5.13M-pixel CCD image sensor to respond to these needs. The ICX452AQ/AQF takes full advantage of the latest semiconductor fabrication technologies and achieves not only the high resolution of 5M pixels, but also better sensitivity and saturation signal level characteristics than the ICX406AQ, which shares the same optical system size. s s s s s ICX452AQ: Primary color filters, DIP ICX452AQF: Primary color filters, SOP Diagonal 9.04 mm (Type 1/1.8), effective 5.13M pixels (2616H x 1960V) Three-field readout method High sensitivity: 235 mV (G signal) High saturation signal level: 500 mV The ICX452AQ/AQF is a diagonal 9.04 mm (Type 1/1.8), 5.13M-pixel CCD image sensor that was developed for highresolution digital still cameras. In conjunction with a mechanical shutter, this sensor can acquire high-resolution images. Since this product has the same image diagonal as the conventional ICX406AQ, a 5Mpixel digital still camera can be implemented without changes to the lens optical system. Table 1 lists the device structure of the ICX452AQ/AQF and table 2 lists its imaging characteristics. Extensive Lineup Figure 1 shows Sony's digital still camera CCD lineup. Sony supports customer needs with its extensive product line that, starting with the ICX202 developed in 1997, covers image sizes from Type 2/3 to Type 1/3.6 with pixel counts from 1.25M to 5M pixels. The newly-developed ICX452AQ/AQF can be seen as both a reduced size version of the ICX282 Type 2/3 5M-pixel sensor, and as an increased pixel count version of the ICX406 Type 1/1.8 4M-pixel sensor. As such, Sony is confident that it will contribute to even further growth of the consumer digital still camera market. High Sensitivity In addition to the fabrication technology used for the on-chip microlenses, Sony has optimized the lens shape and adopted thinfilm primary color filters to improve the optical condensing characteristics. This improved technology allows the ICX452AQ/AQF to achieve a sensitivity of 235 mV, despite the 2.775 m diagonal unit pixel. Timing Generator IC Sony provides the CXD3619R drive timing generator IC, which includes vertical and horizontal drivers. This IC supports both high frame rate readout mode and AF mode. High Saturation Signal Level To increase the dynamic range even further, the ICX452AQ/AQF adopts the same three-field readout system used in the ICX432DQ/DQF. This allows the area occupied by the photodiode in the unit pixel to be increased over that of conventional Sony products, and achieves a saturation signal of 500 mV. V O I C E We developed this new Type 1/1.8 5M-pixel CCD to respond to market demands for further miniaturization and higher pixel counts. The idea behind this product is to enable miniature digital still cameras to achieve even better picture quality. I strongly recommend that you consider developing a digital still camera that can take advantage of the characteristics of this device. s Table 1 Device Structure Pixel count 5M Type 2/3 ICX282 ICX452 Type 1/2 or 1/1.8 4M ICX406 Type 1/2.7 ICX252 3M ICX432 Item Image size Transfer method Readout method Vertical register transfer clock signals Total number of pixels Number of effective pixels Number of active pixels Number of recommended recording pixels (Aspect ratio: 4:3) Chip size ICX452AQ Diagonal 9.04 mm (Type 1/1.8) Frame readout interline transfer method Three field readout method 8 signal lines Approx. 5.25M (2668H x 1970V) Approx. 5.13M (2616H x 1960V) Approx. 5.09M (2608H x 1952V) Approx. 5.04M (2592H x 1944V) 8.23 mm (H) x 6.68 mm (V) 2.775 m (H) x 2.775 m (V) Square pixels 24.3 MHz 20-pin plastic DIP/SOP 2M ICX224 ICX284 ICX434 Type 1/3.2 ICX202 1M ICX232 Type 1/3.6 Unit cell size Horizontal drive frequency Package 1997 1998 1999 2000 2001 2002 Year (FY) s Figure 1 Digital Still Camera CCD Lineup s Table 2 Image Sensor Characteristics GND GND V5B V5A V3B V3A V6 V4 V2 V1 Item Sensitivity (G sensitivity) Saturation signal ICX452AQ 235 mV Remarks 3200K, 706 cd/m2, F5.6, 1/30 s accumulation 10 9 8 7 6 5 4 3 2 1 500 mV -90 dB During frame readout None when a mechanical shutter is used R Vertical register G B G B G B G R G R G R G R G B G B Smear G B G B Frame readout mode High frame rate readout mode Frame readout mode G R G R G R -77 dB 3.75 frames/s 30 frames/s (NTSC mode) 25 frames/s (PAL mode) 60 frames/s (NTSC mode) 50 frames/s (PAL mode) Frame rate G B G (Note) High frame rate readout mode Horizontal register AF mode 11 VOUT 12 VDD 13 RG 14 H2B 15 H1B 16 SUB 17 CSUB 18 VL 19 H1A 20 H2A Note: The small squares ( ) are photosensors. s Figure 2 ICX452 Block Diagram |
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