ADS1148: Required acquisition circuit / sampling frequency of ADS1148

Ganesh Potdar

Part Number: ADS1148

Hi,

We are using ADC IC ADS1148 for in our project for different types of Analog Sensors (Hall, Temperature etc..). We did not find Acquisition circuit with HOLD capacitor and Interconnect resistor. To calculate the sampling frequency for different analog input channels these details are required. If not, please suggest other method to calculate the sampling frequency.

Regards,

Ganesh Potdar

over 5 years ago

0 Alexander Smith over 5 years ago

TI__Guru 55152 points

Hi Ganesh,

The ADS1148 is a delta-sigma ADC, so the input signal is sampled at the modulator frequency, fmod, which is based on the output data rate. Please see Table 5. in section 9.3.4 Modulator.

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ADS1148: Required acquisition circuit / sampling frequency of ADS1148