CS3302
This voltage is typically from a bipolar ±2.5 V sup-
the VA- supply before analog signals are applied to
ply. When using bipolar supplies the analog signal the device. It is recommended to clamp the VA-
common mode voltage should be biased to 0 V.
The analog power supplies are recommended to be
supply to system ground using a reverse biased
Schottky diode to prevent possible latch-up condi-
bypassed to system ground using 0.1 µF X7R type tions related to mismatched supply rail initializa-
capacitors.
tion.
2.3.2
Digital Power Supplies
The VA- supply is connected to the CMOS sub-
strate and as such must remain the most negative
applied voltage to prevent potential latch-up condi-
tions. Care should be taken to ensure analog input
voltages do not drop more than -0.3 V below the
VA- supply. Care should also be taken to establish
The digital power supply across the VD and DGND
pins is flexible and can be set to interface with
3.3 V or 5 V logic. The digital power supply should
be bypassed to system ground using a 0.01 µF X7R
type capacitor.
12
DS596F3
CIRRUS [ CIRRUS LOGIC ]
