WM8523 datasheet(47/51 Pages) WOLFSON

47 / 51 page

Production Data

WM8523

PD, Rev 4.1, August 2011

RECOMMENDED ANALOGUE LOW PASS FILTER

Figure 41 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 41 has a -3dB cut-off at 105.26kHz and a droop of 0.15dB at

20kHz. The typical output from the WM8523 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 WM8523.

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

WM8523 데이터시트(PDF) 47 Page - Wolfson Microelectronics plc