WM8960CGEFLSLASHV datasheet(89/94 Pages) CIRRUS

89 / 94 page

WM8960

Rev 4.4

APPLICATIONS INFORMATION

RECOMMENDED EXTERNAL COMPONENTS

0.1uF

4.7uF

0.1uF

4.7uF

100uF

HEADPHONE_L

HEADPHONE_R

MICBIAS

2k2

MICBIAS

SCLK

ADCLRC/

GPIO

SDIN

DACLRC

BCLK

MCLK

DACDAT

ADCDAT

1uF

MONO_OUT

1uF

LINE_INL

LINE_INR

DCVDD

DBVDD

SPKVDD1

SPKVDD2

AVDD

ADCLRC/GPIO

DACLRC

BCLK

ADCDAT

DACDAT

MCLK

LINPUT3

LINPUT2

LINPUT1

RINPUT3

RINPUT2

RINPUT1

SCLK

SDIN

DGND

AGND

SPKGND1

SPKGND2

VMID

MICBIAS

HP_L

HP_R

OUT3

SPK_LP

SPK_LN

SPK_RP

SPK_RN

GNDPADDLE

Notes:

1. AGND and DGND should be connected as close to the WM8960 as possible.

2. Supply decoupling capacitors on DCVDD, DBVDD, SPKVDD and AVDD shoule be positioned as close to the WM8960 as possible.

3. Capacitor types should be carefully chosen. Capacitors with very low ESR are recommended for optimum performance.

4. Microphone common mode noise performance can be improved by adding resistors from the microphone negative terminal to

ground.

5. The speakers should be connected as close as possible to the WM8960. When this is not possible, filtering should be placed on the

speaker outputs close the the WM8960.

4.7uF

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.

WM8960CGEFL/V Datasheet(PDF) 89 Page - Cirrus Logic

WM8960CGEFL/V Datasheet(HTML) 89 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94

Datasheet Download

Link URL