Datasheet

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AC Power Supply Rejection Ratio (AC PSRR)
(ExpressedindBc)
DV
SUP
DV
OUT
10
PSRR=20Log
(8)
Common-Mode Rejection Ratio (CMRR)
(ExpressedindBc)
DV
CM
DV
OUT
10
CMRR=20Log
(9)
Voltage Overload Recovery
ADS6145, ADS6144
ADS6143, ADS6142
SLWS198B – JULY 2007 – REVISED MARCH 2008
AC PSRR is the measure of rejection of variations in the supply voltage of the ADC. If Δ V
SUP
is the change in the
supply voltage and Δ V
OUT
is the resultant change in the ADC output code (referred to the input), then
CMRR is the measure of rejection of variations in the input common-mode voltage of the ADC. If Δ Vcm is the
change in the input common-mode voltage and Δ V
OUT
is the resultant change in the ADC output code (referred
to the input), then
The number of clock cycles taken to recover to less than 1% error for a 6-dB overload on the analog inputs. A
6-dBFS sine wave at Nyquist frequency is used as the test stimulus.
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Product Folder Link(s): ADS6145, ADS6144 ADS6143, ADS6142