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ADVANCED COMMUNICATIONS & SENSING
13.4.8 Mode
Charge pump force ON and OFF allows to force ON or OFF the internal voltage multiplier to avoid
conversion interruptions due to the pump switching off and on when the V
ON takes priority to Force OFF.
VREF chopping control allow chopping of the 1.22V internal bandgap reference. This helps to eliminate
bandgap related internal offset voltage and 1/f noise. The bandgap chop state may be forced High or Low,
or may be set to toggle during conversion at either the same rate or half the rate of the Elementary
Conversion.
Bandgap on D0 pin, outputs the SX8724S internal V
internal bandgap reference or the ability to use an external reference input for the ADC, or the option to
filter the internal V
VREF on D1 pin allows to select D1 pin as reference voltage for the acquisition chain. As described in
Section
13.4.1, D1 can input a V
between 0V and V
ACS - Revision 1.0
© Semtech Corp.
output before feeding back as V
REF
. When using an external V
REF
.
BATT
May 2011
Evaluation Kit for SX8724S Data Acquisition System
on D0 pin. This allows external monitoring of the
REF
input.
REF,ADC
REF,ADC
Page 26
SX8724SEVK
USER GUIDE
supply is near 3V. Force
BATT
input, it may have any value
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