On 9/9/06, Mark Rages wrote: > On 9/9/06, Xiaofan Chen wrote: > > The other vendors who offer 16bit ADCs are Analog Device and Silicon Labs > > but the price is much higher. I really need the 16bit resolution. > > > > Can you really get that resolution on an integrated ADC? 16-bits is > 96 dB. With a 4V signal range, the LSB is 61 microvolts. It seems > like a microcontroller would have more noise than this. I could be > wrong. I think we could get the resolution but not the absolute accuracy of 1LSB. We need to do caliberation as well in order to correct the offset and non-linearity. There are MCUs integrated with 24bit ADCs like the TI MSC 12xx 8051 based MicroSystem Mixed-Signal Data Converters. I was thinking of using them but they are not cheap. > What frequencies are you looking at? Audio ADCs are cheap, but may > not go to DC. I only need 1ksps but the analog input signal will be low frequency and can be DC. Regards, Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist