TABLE I.

Measured Performance Summary

Process technology	AMI 0.5µm CMOS
Chip size	1.5mm by 1.5mm
Supply voltage	3.3V
Amplifier Bandwidth	200Hz-20kHz
Amplifier Gain	53dB
Amplifier Output swing	2.2V
Input-referred rms noise	2.8µV
Amplifier power (4-channel)	75.9µW
Sampling Method	Level-crossing sampling
Resolution	5 bit
Reconstruction Method	Software
Chip power* (4-channel static)	118.8µW
Chip power* (4-channel pulse rate 240k/sec total)	501.6µW
Conversion Efficiency	1.6nJ/conversion

^*including ADC, front-end amplifier and buffer