WM8501 Wolfson Microelectronics plc, WM8501 Datasheet - Page 17

• Manufacturer Part Number: WM8501
• Description: 24-bit 192khz Stereo Dac With 1.7vrms Line Driver
• Manufacturer: Wolfson Microelectronics plc

Production Data
POWER UP/DOWN SEQUENCE
RECOMMENDED ANALOGUE LOW PASS FILTER
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POWER UP/DOWN SEQUENCE
For click free operation, the WM8501 should be powered up and down in a specific sequence.
Power-up:
1.
2.
3.
Power-down:
1.
2.
3.
Figure 18 Recommended 1
Note: Capacitors should be COG dielectric.
An external single pole RC filter is recommended (see Figure 18) if the device is driving a
wideband amplifier. However the WM8501 does contain an internal low pass filter which should
be adequate in most applications.
Power up AVDD and DVDD and wait to settle
Turn on clocks and data (MCLK, BCLK, LRCLK, SDATA)
Switch ENABLE pin from low to high
Switch Enable from high to low
Remove clocks and data
Power down AVDD and DVDD
st
Order Low Pass Filter
PD, Rev 4.2, July 2009
WM8501
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