WM8352GEB/V Wolfson Microelectronics, WM8352GEB/V Datasheet - Page 326

• Manufacturer Part Number: WM8352GEB/V
• Description: Audio CODECs Audio CODEC plus pwr management
• Manufacturer: Wolfson Microelectronics

Specifications of WM8352GEB/V

• Number Of Adc Inputs: 2
• Number Of Dac Outputs: 2
• Conversion Rate: 48 KSPS
• Interface Type: Serial (2-Wire, 3-Wire, 4-Wire)
• Resolution: 12 bit
• Operating Supply Voltage: 3.7 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: BGA
• Minimum Operating Temperature: - 25 C
• Number Of Channels: 2 ADC/2 DAC
• Supply Current: 260 uA
• Thd Plus Noise: - 83 dB
• Audio Codec Type: Stereo
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 8
• No. Of Output Channels: 6
• Adc / Dac Resolution: 24bit
• Adcs / Dacs Signal To Noise Ratio: 95dB
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8352
29.2 VOLTAGE REFERENCE (VREF) COMPONENTS
29.3 DC-DC (STEP-DOWN) CONVERTER EXTERNAL COMPONENTS
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A decoupling capacitor is required between CREF and REFGND; a 2.2uF X5R capacitor is
recommended.
A reference resistor is required between RREF and REFGND; a 100kΩ (1%) resistor is
recommended.
The recommended connections to the DC-DC (Step-Down) Converters are illustrated in Figure 88.
Figure 88 DC-DC (Step-Down) Converters External Components
When selecting suitable capacitors, is it imperative that the effective capacitance is within the
required limits at the applicable input/output voltage of the converter. It should be noted that some
components’ capacitance changes significantly depending on the DC voltage applied. Ceramic X7R
or X5R types are recommended.
The choice of output capacitor for DC-DC1 and DC-DC6 varies depending on the required transient
response. A value of 30μF is recommended in the first instance. Larger values (up to 100μF) may be
required for optimum performance under large load transient conditions. Smaller values (down to
10μF) may be sufficient for a steady load in some applications.
For layout and size reasons, users may choose to implement large values of output capacitance by
connecting two or more capacitors in parallel.
To ensure stable operation, the register fields DC1_CAP and DC6_CAP must be set according to the
output capacitance, as detailed in Table 155.
Table 155 Register Control for DC-DC1 and DC-DC6 Output Capacitor
R180 (B4h)
R195 (C3h)
ADDRESS
15:14
15:14
BIT
DC6_CAP
DC1_CAP
LABEL
DEFAULT
00
00
DC-DC1 Output Capacitor
00 = 10uF, 30uF, 45uF
01 = 60uF, 85uF
10 = Not used
11 = 100uF
DC-DC6 Output Capacitor
00 = 10uF, 30uF, 45uF
01 = 60uF, 85uF
10 = Not used
11 = 100uF
DESCRIPTION
PD, March 2010, Rev 4.2
Production Data
326