Other Parts Discussed in Thread: BQ79735-Q1
Hello, my name is Sangil Park and I am working on BMS HW development.
I am currently reviewing TI's ADS131M08-Q1 product, which has 24-bit ADC performance, for monitoring battery pack voltage.
I have a few questions for feasibility study of this chip. I look forward to your prompt response.
1. Three questions regarding IC accuracy :
1-1. I would like to calculate the total error to determine the accuracy of the IC. Please check if they are any missing elements in calculating the total error.
Total error : Offset error + offset drift + gain error + gain drift + integral nonlinearity + noise.
(Precondition : Gain 1, FSR 1.2V, Global chop mode disable, 32kSPS, OSR 128)
1-2. Is it okay to remove the error and drift caused by offset and gain if we run calibration?
1-3. Is it correct that the accuracy of 1.2V ref voltage is not considered in the ADC performance?
2. Functional safety
2-1. The product is marked as "FS capable" instead of "FS compliant". I am curious about the meaning of the "capable"
3. Differences from BQ79735
3-1. We have been using TI's BQ79735-Q1 product. Could you explain the main differences compared to this product?
4. Other questions.
4-1. I am curious about the schedule for this product, such as SOP schedule and PPAP schedule, Engineering sample schedule, etc.
4-2. I am interested in the reference unit price of this product. If you could provide the price based on a volume of 100k/year for 5 ears, it would be great.