Title :
Balanced Low Noise High Dynamic Photodiode Interface for Automotive
Author_Institution :
AMIS Mixed Signal Design Center, Brno
Abstract :
A high performance balanced photodiode sensor interface for the automotive industry is introduced. A novel switched current based architecture provides 100dB input current dynamic range. Correlated double sampling technique is used for 1/f noise suppression in the MOS input circuitry. Sigma delta ADC (13 bit) is used. The measured SNR is >66dB. Embedded offset compensation supports fast 236mus conversion cycle per channel. Mixed signal chip architecture is described. EMC emissions measurement results meet the strict automotive limits
Keywords :
1/f noise; automotive electronics; electromagnetic compatibility; interference suppression; mixed analogue-digital integrated circuits; optical sensors; peripheral interfaces; photodiodes; switched current circuits; 1/f noise suppression; 13 bit; 236 mus; EMC emissions measurement; MOS input circuitry; automotive industry is introduced; balanced photodiode sensor interface; double sampling technique; embedded offset compensation; low noise high dynamic photodiode interface; mixed signal chip; sigma delta ADC; switched current; Automotive engineering; Circuit noise; Delta-sigma modulation; Dynamic range; Electromagnetic compatibility; Photodiodes; Sampling methods; Semiconductor device measurement; Signal to noise ratio; Vehicle dynamics; 1/f noise; 100dB input current dynamic range; Balanced photodiode sensor interface; SNR; correlated double sampling; mixed signal chip;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.320992
