WM8903LGEFK/RV Wolfson Microelectronics, WM8903LGEFK/RV Datasheet - Page 172

• Manufacturer Part Number: WM8903LGEFK/RV
• Description: Audio CODECs ULTRA LOW PWR HI FI CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8903LGEFK/RV

• Audio Codec Type: Stereo Codec
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 6
• No. Of Output Channels: 8
• Adc / Dac Resolution: 24bit
• Sampling Rate: 96kHz
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Adcs / Dacs Signal To Noise Ratio: 96dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8903
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
Figure 67 Recommended External Components
Notes:
1.
2.
C5 (CFB1-CFB2)
C6 (VNEG)
C7 (VPOS)
Table 85 Charge Pump Capacitors
w
COMPONENT
X5R ceramic capacitor is recommended for capacitors C1, C2, C3, C4, C6, C7, C12 and C13.
All decoupling capacitors should be positioned as close to the WM8903 as possible.
The positioning of C12 and C13 is particularly important - these should be as close to the WM8903 as possible.
Specific recommendations for C5, C6 and C7 are provided in Table 85. Note that two different recommendations are provided
for these components; either of these components is suitable, depending upon size requirements and availability.
The positioning of C5 is very important - this should be as close to the WM8903 as possible.
It is important to select a suitable capacitor type for the Charge Pump. Note that the capacitance may vary with DC voltage;
care is required to ensure that required capacitance is achieved at the applicable operating voltage, as specified in Table 85.
The capacitor datasheet should be consulted for this information.
Decoupling Capacitors
Charge Pump Capacitors
CAPACITANCE
≥ 1μF at 2VDC
≥ 2μF at 2VDC
REQUIRED
VALUE
2.2μF
2.2μF
2.2μF
4.7μF
MuRata GRM155R60J225ME15_EIA
MuRata GRM188R61A225KE34D
MuRata GRM155R60J475M_EIA
Kemet C0402C225M9PAC
PART NUMBER
VOLTAGE
6.3v
6.3v
6.3v
10v
PD, Rev 4.0, September 2010
TYPE
X5R
X5R
X5R
X5R
Production Data
0402
0402
0603
0402
SIZE
172