WM9711LEFT/RV 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

부품명

상세내역

제조사

WM9711LEFT/RV

Low Power Audio CODEC for Portable Applications

Wolfson Microelectronics plc 

WM9711L

BTL SPEAKER OUTPUT

LOUT2 and ROUT2 can differentially drive a mono 8Ω speaker as shown below.

Production Data

WM9711L

INV = 1

LOUT2

LOUT2VOL

-1

ROUT2

ROUT2VOL

Stereo: VSPKR = L-(-R) = L+R

Mono: VSPKR = M-(-M) = 2M

Figure 19 Speaker Output Connection (INV = 1)

The right channel is inverted by setting the INV bit, so that the signal across the loudspeaker is the

sum of left and right channels.

COMBINED HEADSET / BTL EAR SPEAKER

In smartphone applications with a loudspeaker and separate ear speaker (receiver), a BTL ear

speaker can be connected at the OUT3 pin, as shown below.

OUT3

WM9711L

HPOUTL

HPOUTR

BTL ear

speaker

HPGND = 0V

Figure 20 Combined Headset / BTL Ear Speaker (OUT3SRC = 00)

The ear speaker and the headset play the same signal. Whenever the headset is plugged in, the

headphone outputs are enabled and OUT3 disabled. When the headset is not plugged in, OUT3 is

enabled (see “Jack Insertion and Auto-Switching”).

COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER

Instead of a BTL ear speaker, a single-ended ear speaker can also be used, as shown below.

OUT3

WM9711L

HPOUTL

HPOUTR

HPGND = 0V

ear speaker

(single-ended)

Figure 21 Combined Headset / Single-ended Ear Speaker (OUT3SRC = 01)

w

PD Rev 4.1 April 2004

62

Share Link: