CS3301A
made using the MUX0 and MUX1 pins as shown in When using bipolar power supplies, the analog sig-
Table 1 on page 7.
nal common mode voltage should be biased to 0 V.
The analog power supplies are recommended to be
bypassed to system ground using 0.1 µF X7R type
capacitors.
Although a mux selection is provided to enable the
INA and INB switches simultaneously, signal cur-
rent should not be driven through them in this
mode. The CS3301A mux switches will maintain The VA- supply is connected to the CMOS sub-
good linearity only with minimal signal currents.
strate and as such must remain the most negative
applied voltage. It is recommended to clamp the
VA- supply to system ground using a reversed bi-
ased Schottky diode to prevent possible damage re-
lated to mis-matched power supply initialization.
2.2.4
Power Down Selection
A power-down mode is available to shut down the
amplifier when not in use. When enabled, all inter-
nal circuitry is disabled, the analog inputs and out-
puts go high-impedance, and the device enters a
2.3.2
Digital Power Supplies
micro-power state. Power down mode is selected The digital voltage across the VD and GND pins is
using the PWDN pin, which is active high.
specified for a +3.3 V power supply. The digital
power supply should be bypassed to system ground
using a 0.01 µF X7R type capacitor.
2.3
Power Supplies
2.3.1
Analog Power Supplies
The analog power pins of the CS3301A are speci-
fied to run from bipolar ±2.5 V power supplies.
DS757F1
11
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