ADS1013-Q1: About FSR

Koji Hayashi92

Part Number: ADS1013-Q1

Hi HI-Team

In my recognition that FSR is fixed at ± 2.048 V regardless of the VDD voltage.
If it it correct, the error of the VDD voltage does not affect the error of AD conversion.
Is it correct ?

Best Regards,
Koji Hayashi

over 5 years ago

0 Joachim Wuerker over 5 years ago

TI__Mastermind 21285 points

Hi Hayashi-san,

your understanding is correct.
The ADS1013-Q1 only offers the +/-2.048V FSR setting and this FSR setting is independent of the supply voltage that is used.

However changes in the supply voltage can in theory still affect the accuracy or resolution of the conversion result. On higher resolution ADCs we express this dependency usually as a PSRR specification. For ADS1013-Q1 we do not specify a PSRR because the effect is unnoticeable. Means the effect is much smaller than an LSB size.

Regards,

0 Koji Hayashi92 over 5 years ago in reply to Joachim Wuerker

Mastermind 6970 points

Hi Joachim-san

Thank you for quick response.

I understand.

Best Regards,

Koji Hayashi

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ADS1013-Q1: About FSR