WM1824B Production Data
w
PD, Rev 4.0, November 2012
20
RECOMMENDED ANALOGUE LOW PASS FILTER
LINEVOUT
2.7nF
560Ω
Figure 14 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 14 has a -3dB cut-off at 105.26kHz and a droop of 0.15dB at
20kHz. The typical output from the WM1824B is 2.1Vrms – when a 10k load is placed at
the output of this recommended filter the amplitude across this load is 1.99Vrms.
RELEVANT APPLICATION NOTES
The following application notes, available from www.wolfsonmicro.com, may provide
additional guidance for use of the WM1824B.
DEVICE PERFORMANCE:
WAN0129 – Decoupling and Layout Methodology for Wolfson DACs, ADCs and CODECs
WAN0144 – Using Wolfson Audio DACs and CODECs with Noisy Supplies
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
