wm9711lgefl-v Wolfson Microelectronics plc, wm9711lgefl-v Datasheet - Page 62

• Manufacturer Part Number: wm9711lgefl-v
• Description: Low Power Audio Codec For Portable Applications
• Manufacturer: Wolfson Microelectronics plc

WM9711L
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BTL SPEAKER OUTPUT
COMBINED HEADSET / BTL EAR SPEAKER
COMBINED HEADSET / SINGLE-ENDED EAR SPEAKER
LOUT2 and ROUT2 can differentially drive a mono 8Ω speaker as shown below.
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.
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.
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”).
Instead of a BTL ear speaker, a single-ended ear speaker can also be used, as shown below.
Figure 21 Combined Headset / Single-ended Ear Speaker (OUT3SRC = 01)
WM9711L
WM9711L
WM9711L
INV = 1
OUT3
HPOUTL
HPOUTR
HPGND = 0V
OUT3
HPOUTL
HPOUTR
HPGND = 0V
-1
LOUT2VOL
ROUT2VOL
ear speaker
(single-ended)
BTL ear
speaker
LOUT2
ROUT2
Stereo: V
Mono: V
SPKR
SPKR
= M-(-M) = 2M
= L-(-R) = L+R
PD Rev 4.3 August 2006
Production Data
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