301020013 datasheet(23/109 Pages) AMSOSRAM

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Dragster

Functional description

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For sensors with multiple segments, the added 2K (7 μm) and 4K (3.5 µm) segments have

only 2048 or 4096 sensitive pixels, respectively. Regarding readout, these segments are

completely independent. This can be exploited to align the readout of the light sensitive pixels

from each segment. To do so, the readout is started in the most left segment 16 pixel clock

cycles earlier than the segments farther to the right. The individual start of readout for different

segments can also be exploited to reduce the required signal bandwidth by sequentially

addressing the SRAM blocks of different 2K/4K segments and multiplexing the data lines.

The sensor features a 13-bit ramp ADC1 with programmable conversion gain and end of range

stage. The on chip digital control circuit generates all necessary control for conversion and the

readout modes. However, the readout of a new line can be triggered over an external signal if

required. The ADC conversion range (maximum number of bits) can be programmed over the

serial interface. Higher conversion range requires longer ADC conversion time.

7.1.1

Placement of pixels

7.1.1.1

DR-XK-7

Figure 7: Placement of pixels sensors with 7 µm pixel pitch (DR8K7)

The first 32 pixels include not only dark pixels but also special pixels like described:

•

The output from the first pixel is directly connected to the pad 1.2

•

The output from the second pixel is directly connected to the pad 21.2

•

The third pixel is a black pixel, electrically fixed to ADC low saturation.

•

The fourth pixel is a white pixel, electrically fixed to ADC high saturation.

1 It is recommended to only use 12-bit ADC resolution, making use of “Enable Saturation” feature (register CONTROL 1 (0x01), bit

5). For more details, check Section 9.1.1.

2 These pixels are light sensitive. The respective outputs are connected to a test point on the headboard for debugging purpose in

certain package variations.

...

2081

2082

...

4128

4129

...

6174

6175

...

8223

8224

7 µm

Special Pixels

Active Pixels

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