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CMOS and CCD comparision table
Feature |
CCD |
CMOS |
Signal out of pixel |
Electron packet |
Voltage |
Signal out of chip |
Voltage (analog) |
Bits (digital) |
Signal out of camera |
Bits (digital) |
Bits (digital) |
Fill factor |
High |
Moderate |
Amplifier mismatch |
N/A |
Moderate |
System Noise |
Low |
Moderate |
System Complexity |
High |
Low |
Sensor Complexity |
Low |
High |
Camera components |
Sensor + multiple support chips + lens |
Sensor + lens possible, but additional support chips common |
Relative R&D cost |
Lower |
Higher |
Relative system cost |
Depends on Application |
Depends on Application |
Performance |
CCD |
CMOS |
Responsivity |
Moderate |
Slightly better |
Dynamic Range |
High |
Moderate |
Uniformity |
High |
Low to Moderate |
Uniform Shuttering |
Fast, common |
Poor |
Uniformity |
High |
Low to Moderate |
Speed |
Moderate to High |
Higher |
Windowing |
Limited |
Extensive |
Antiblooming |
High to none |
High |
Biasing and Clocking |
Multiple, higher voltage |
Single, low-voltage |
