WAU8822YG Nuvoton Technology Corporation of America, WAU8822YG Datasheet - Page 11

• Manufacturer Part Number: WAU8822YG
• Description: IC STER AUDIO CODEC 24BIT 32-QFN
• Manufacturer: Nuvoton Technology Corporation of America
• Series: emPowerAudio™r
• Type: Stereo Audior

Specifications of WAU8822YG

• Data Interface: I²C, Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 90 / 94
• Voltage - Supply, Analog: 2.5 V ~ 3.6 V
• Voltage - Supply, Digital: 1.65 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• For Use With: WAU8822EVB - BOARD EVALUATION FOR WAU8822
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2
2.1
Note 1: All non-polar capacitors are assumed to be low ESR type parts, such as with MLC construction or similar.
Note 2: Load resistors to ground on outputs may be helpful in some applications to insure a DC path for the output
Note 3: To minimize pops and clicks, large polarized output capacitors should be a low leakage type.
Note 4: Depending on the microphone device and PGA gain settings, common mode rejection can be improved by
WAU8822 Data Sheet Rev 0.86
emPowerAudio
Jack Switch
Detection
Example
1200 ohm
1200 ohm
R4
R3
220K ohm
“electret”
“electret”
Typical Application Schematic
type Mic
type Mic
Application Information
ECM
ECM
VSS
R5
If capacitors are not low ESR, additional 0.1ufd and/or 0.01ufd capacitors may be necessary in parallel with
the bulk 4.7ufd capacitors on the supply rails.
capacitors to charge/discharge to the desired levels. If the output load is always present and the output load
provides a suitable DC path to ground, then the additional load resistors may not be necessary. If needed,
such load resistors are typically a high value, but a value dependent upon the application requirements.
choosing the resistors on each node of the microphone such that the impedance presented to any noise on
either microphone wire is equal.
Figure 2: Schematic with recommended external components for typical application with
™
VDDB
1000 ohm
R2
1000 ohm
No Connection
Analog Inputs:
AC-coupled headphones and stereo electret (ECM) style microphones.
if “not used”
R1
4.7uF
C10
C15
C16
1uF
C13
1uF
C14
1uF
C12
C11
1uF
1uF
1uF
10
16
17
15
18
11
19
20
32
8
7
9
3
6
2
1
5
4
MCLK
BCLK
FS
DACIN
ADCOUT
SCLK
SDIO
CSB/GPIO1
MODE
LLIN/GPIO2
RLIN/GPIO3
LAUXIN
RAUXIN
LMICN
RMICN
RMICP
MICBIAS
LMICP
WAU8822
Page 11 of 21
VREF
27
VSS
4.7uF
C9
RSPKOUT
AUXOUT2
LSPKOUT
AUXOUT1
V
V
DDSPK
V
SSSPK
RHP
V
V
V
V
LHP
DDC
DDA
DDB
SSA
SSD
14
13
24
12
21
22
29
23
25
31
26
28
30
1uF
1uF
C5
C6
220uF
+
220uF
+
C7
C8
vss
vss
VDDSPK
VSS
optional
optional
4.7uF
C1
R9
R8
R7
R6
VDDA
September 4, 2008
4.7uF
C2
VDDC
“sleeve” on 3.5mm
Audio connector
Stereo connector
Right Headphone
Stereo connector
Left Headphone
“ring” on 3.5mm
“tip” on 3.5mm
4.7uF
C3
VSS
VDDB
4.7uF
C4