Cirrus Logic AN285 - Manual (Page 4)

4 AN285REV1
AN285
Figure 2. CS5343/4 Typical Connection Diagram
4. POWER
4.1 CS5333 Power
The CS5333 receives power to the analog and digital cores through the VA supply pin, while VL powers the
digital interface logic. Both VA and VL on the CS5333 can accept power ranging from +1.7 V to +3.6 V. The
full-scale reference voltage scales with VA such that nominal full-scale voltage is VA/3.6 Vrms. VL deter-
mines the digital interface voltage to within the specifications listed under “Digital Characteristics” in the
CS5333 datasheet.
4.2 CS5343/4 Power
The CS5343/4 features a single supply pin, VA, which powers the analog and digital cores as well as the
digital interface logic. With a range from +3.13 to +5.25 V, VA determines the nominal full-scale input voltage
according to 0.56xVA Vpp. Additionally, VA also determines the digital interface voltage as described further
under “Digital Characteristics” in the CS5343/4 datasheet.
FILT+
0.1 µF
CS5343/4
SCLK
MCLK
VQ
1 µF
+
VA
1
µF
+
SDOUT
LRCK
Audio Data
Processor
Timing Logic
and Clock
0.1
µF
0.1
µF
GND
1µF
+
AINL
AINR
3.3 V to 5 V
Ω 10k
VA or GND
Pull-up to VA for Master Mode
Pull-down to GND for Slave Mode
1
Analog Input
Circuitry
Figure 4
VA
1.
Ω 10k
2
.
Ω 10k
2
Optional pull-up resistor for configuring
clocks in Master Mode as described in
Sections 5.2 and 6.2 2.
A/D Converter