LUPA-4000_07 Datasheet, PDF (11/38 Pages) Cypress Semiconductor – 4M Pixel CMOS Image Sensor

LUPA-4000
Setting of the ADC reference voltages
Figure 7. In- and external ADC connections
2.5V
RHIGH_ADC
REF_HIGH ~ 2 V
R_ADC
external
internal
REF_LOW ~ 1 V
external
RLOW_ADC
The internal resistor R_ADC has a value of approximately 300Ω.
This results in the values for the external resistors:
Resistor
R_{ADC_VHIGH}
R_ADC
Value (Ω)
75
300
Resistor
R_{ADC_VLOW}
Value (Ω)
220
The values of the resistors depend on the value of R_ADC. The
voltage difference between ADC_VLOW and ADC_VHIGH
should be at least 1.0V to assure proper working of the ADC.
Synchronous shutter
In a synchronous (snapshot) shutter light integration takes
place on all pixels in parallel, although subsequent readout is
sequential.
Figure 8. Synchronous shutter operation
Line number
Integration time
Document Number: 38-05712 Rev. *B
Time axis
Burst Readout time
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