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ADS117L11: power supply

Part Number: ADS117L11
Other Parts Discussed in Thread: ADS7052

Used in single power supply, low-speed mode.
The specification sheet states AVDD1 to AVSS, low-speed mode 2.85 5.5V,
Is it possible to use AVDD1=AVDD2=IOVDD=+1.8V, AVSS=DGND=GND(0V)?

  • Hello Hiroyuki-san,

    Unfortunately no;  AVDD1 requires a minimum voltage of 2.85V relative to AVSS.  With AVSS=DGND=0V, AVDD1 also requires a minimum voltage of 2.85V relative to DGND.

    We do not have many precision ADC's that can operate with an analog supply voltage down to 1.8V.  However, the ADS7052 is a 14b, 1MSPS SAR ADC that can operate down to 1.65V supply voltage.  You could average several readings to improve the effective resolution of the ADC if needed.

    Keith Nicholas
    Precision ADC Applications

  • Thank you very much.