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CS3301A
made using the MUX0 and MUX1 pins as shown in
Table 1 on page 7 .
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
good linearity only with minimal signal currents.
When using bipolar power supplies, the analog sig-
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 μ F X7R type
capacitors.
The VA- supply is connected to the CMOS sub-
strate and as such must remain the most negative
2.2.4
Power Down Selection
applied voltage. It is recommended to clamp the
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-
VA- supply to system ground using a reversed bi-
ased Schottky diode to prevent possible damage re-
lated to mis-matched power supply initialization.
puts go high-impedance, and the device enters a
2.3.2
Digital Power Supplies
micro-power state. Power down mode is selected
using the PWDN pin, which is active high.
The digital voltage across the VD and GND pins is
specified for a +3.3 V power supply. The digital
2.3
2.3.1
Power Supplies
Analog Power Supplies
power supply should be bypassed to system ground
using a 0.01 μ F X7R type capacitor.
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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