Production Data

WM8533

w

PD, July 2012, Rev 4.0

39

RECOMMENDED ANALOGUE LOW PASS FILTER

Figure 36 Recommended Analogue Low Pass Filter (one channel shown)

An external single-pole RC filter is recommended if the device is driving a wideband amplifier. Other

filter architectures may provide equally good results.

The filter shown in Figure 36 has a -3dB cut-off at 105.26kHz and a droop of 0.15dB at 20kHz. The

typical output from the WM8533 is 2.1Vrms – when a 10kΩ load is placed at the output of this

recommended filter the amplitude across this load is 1.99Vrms.

RELEVANT APPLICATION NOTES

guidance for use of the WM8533.

DEVICE PERFORMANCE:

WAN0129 – Decoupling and Layout Methodology for Wolfson DACs, ADCs and CODECs

WAN0144 – Using Wolfson Audio DACs and CODECs with Noisy Supplies

WTN0302 - WM8524 Recommended Power Sequence and Timing (for hardware mode)

GENERAL:

WAN0108 – Moisture Sensitivity Classification and Plastic IC Packaging

WAN0109 – ESD Damage in Integrated Circuits: Causes and Prevention

WAN0158 – Lead-Free Solder Profiles for Lead-Free Components

WAN0161 – Electronic End-Product Design for ESD