Table 3.

Comparison with other types of the column-parallel ADC.

Reference	[14]	[4]	[6]	[7]	This Work
Technology	0.18-μm	0.18-μm	0.25-μm	0.35-μm	0.18-μm
Pixel array	N/A	160 × 140	400 × 330	320 × 240	1024 × 32
Pixel pitch	N/A	5.6 μm	7.4 μm	5.6 μm	15 μm
Chip size	N/A	2 × 1.5 mm2	5 × 5 mm2	3.6 × 3.6 mm2	18.5 × 11.9 mm2
Architecture	Single Slope	Single Slope	Multiple-ramp SS	Two-step SS	Two-step SS
Resolution	10-bit	8-bit	10-bit	10-bit	12-bit
Conversion time	31 μs	120 μs	16 μs	4 μs	36 μs
Column power	137 μW	46 μW	95 μW	150 μW	128 μW