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WM9711 Datasheet(PDF) 62 Page - Wolfson Microelectronics plc |
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WM9711 Datasheet(HTML) 62 Page - Wolfson Microelectronics plc |
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62 / 66 page  WM9711L Production Data w PD Rev 4.1 April 2004 62 BTL SPEAKER OUTPUT LOUT2 and ROUT2 can differentially drive a mono 8 Ω speaker as shown below. LOUT2 ROUT2 WM9711L INV = 1 Stereo: V SPKR = L-(-R) = L+R Mono: V SPKR = M-(-M) = 2M ROUT2VOL LOUT2VOL -1 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. HPOUTL HPOUTR HPGND = 0V WM9711L OUT3 BTL ear speaker 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. HPOUTL HPOUTR HPGND = 0V WM9711L OUT3 ear speaker (single-ended) Figure 21 Combined Headset / Single-ended Ear Speaker (OUT3SRC = 01) |
Similar Part No. - WM9711 |
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Similar Description - WM9711 |
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