Part Number: ADS1675REF
I am looking for fast ADC chip that can produce 1M sample per second with less than 0.5mV error. TI's ADS1299 is a good ADC chip widely used in EEG HW. Its error can be less than 0.1mV with 250 sample rate. However its max sample rate is only 16k.
ADS1675 seems a good choice. I wonder if there is any breakout board for it. Its evaluation board is rather expensive $499.