ADC solution for PID control system

Ryder Nguyen

Prodigy 110 points

Other Parts Discussed in Thread: ADS7028, ADS8528

Dear!

I am looking for an ADC solution

I need to measure the differential voltage of 8 pairs of signal

The voltage range is -12V to +12V

I need the ADC chip to work independently with the MCU.

The ADC chip measures all channels and updates the converted data in the buffer, the MCU will read out the data when the system needs it.

Please help to suggest suitable part numbers

Thanks and Best Regards

Ryder

over 2 years ago

0 Tom Hendrick over 2 years ago

TI__Guru**** 181351 points

Hi Ryder,

What sort of conversion speed and resolution are you looking for?

0 Ryder Nguyen over 2 years ago in reply to Tom Hendrick

Prodigy 110 points

hi, it is about 2000 samples per second and 12bit resolution

+1 Tom Hendrick over 2 years ago in reply to Ryder Nguyen

TI__Guru**** 181351 points

Hi Ryder,

The ADS8528 is a 12-bit 8 channel SAR converter that can handle +/-12V. It would need a 'convert start' to come from the MCU or some other timer function to initiate a conversion cycle. There is also the ADS7028 which can run in an autonomous fashion, but the inputs are restricted to 0-5V. We don't have anything that can take +/-12 directly and run in an autonomous fashion.

0 Ryder Nguyen over 2 years ago in reply to Tom Hendrick

Prodigy 110 points

Thanks Tom!

I think I will choose ADS8528

Thanks for your support

BRs

Ryder

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ADC solution for PID control system