LUPA-1300 CYPRESS [Cypress Semiconductor], LUPA-1300 Datasheet - Page 21

• Manufacturer Part Number: LUPA-1300
• Description: 1.3 M Pixel High Speed CMOS Image Sensor
• Manufacturer: CYPRESS [Cypress Semiconductor]

3.7 Non-destructive readout (NDR)
The sensor can also be read out in a non-destructive way. After a pixel is initially
reset, it can be read multiple times, without resetting. The initial reset level and all
intermediate signals can be recorded. High light levels will saturate the pixels
quickly, but a useful signal is obtained from the early samples. For low light levels,
one has to use the later or latest samples.
Essentially an active pixel array is read multiple times, and reset only once. The
external system intelligence takes care of the interpretation of the data. Table 6
summarizes the advantages and disadvantages of non-destructive readout.
3.8 Operation and signaling
One can distinguish the different signals into different groups:
Cypress Semiconductor Corporation
Contact [e-mail]
Advantages
Low noise – as it is true CDS.
High sensitivity – as the conversion
capacitance is kept rather low.
High dynamic range – as the results
includes signal for short and long
integrations times.
• Power supplies and grounds
• Biasing and analog signals
• Pixel array signals
• Digital signals
• Test signals
LUPA-1300
Datasheet
Table 6: Advantages and disadvantages of non-destructive readout.
Figure 10. Principle of non-destructive readout.
Document # : 38-05711 Rev.**( Revision 3.1)
3901 North First Street
Disadvantages
System memory required to record the
reset level and the intermediate samples.
Requires multiples readings of each pixel,
thus higher data throughput.
Requires system level digital calculations.
San Jose, CA 95134
Page 21 of 48
408-943-2600
time