WM8960 datasheet(86/92 Pages) WOLFSON

部件名	WM8960

功能描述	Stereo CODEC with 1W Stereo Class D Speaker Drivers and Headphone Drivers for Portable Audio Applications

PDF	92 Pages

Scroll/Zoom	100%

制造商	WOLFSON [Wolfson Microelectronics plc]

网页	http://www.wolfsonmicro.com

标志

86 / 92 page

WM8960

Production Data

PD, August 2013, Rev 4.2

APPLICATIONS INFORMATION

RECOMMENDED EXTERNAL COMPONENTS

SPEAKER SELECTION

For filterless operation, it is important to select a speaker with appropriate internal inductance. The

internal inductance and the speaker's load resistance create a low-pass filter with a cut-off frequency

of:

fc = RL / 2L

e.g. for an 8

 speaker and required cut-off frequency of 20kHz, the speaker should be chosen to

have an inductance of:

L = RL / 2fc = 8 / 2 * 20kHz = 64H

 speakers typically have an inductance in the range 20H to 100H. Care should be taken to

ensure that the cut-off frequency of the speaker's internal filtering is low enough to prevent speaker

damage. The class D outputs of the WM8960 operate at much higher frequencies than is

recommended for most speakers, and the cut-off frequency of the filter should be low enough to

protect the speaker.

WM8960 数据表(PDF) 86 Page - Wolfson Microelectronics plc