WM8533 datasheet(39/41 Pages) WOLFSON

39 / 41 page

Production Data

WM8533

PD, July 2012, Rev 4.0

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

The following application notes, available from www.wolfsonmicro.com, may provide additional

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

WM8533 Datasheet(PDF) 39 Page - Wolfson Microelectronics plc