Datasheet

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INP1 or INP2
INM1 or INM2
C
C
Analog Input
Analog Output
OUTP1
OUTM1
RL
Differential Output OUTP/OUTM
OUTP1
OUTM1
RL
Single-Ended Output OUTP/OUTM
C
OUTP2
OUTP3
RL
OUTMV
RL
TLV320AIC12, TLV320AIC13
TLV320AIC14, TLV320AIC15
TLV320AIC12K, TLV320AIC14K
SLWS115E – OCTOBER 2001 – REVISED JANUARY 2007
Functional Description (continued)
Figure 23. Single-Ended Input
The OUTP and OUTM are differential output from the DAC channel. The OUTP1 and OUTM1 can drive a load
of 600- Ω directly and be either differential or single-ended (see Figure 24 ). The OUTP2 and OUTP3 are output
from two audio amplifiers to drive low-voltage speakers like those in the handset and headset. They can drive a
load of 16- Ω directly and be configured as either differential output or single-ended output as by bit D7 of the
control register 6 (see Figure 25 ). If OUTP2 and OUTP3 are differential output, the OUTMV pin becomes the
common inverting output. Both OUTP2 and OUTP3 can be used simultaneously if each differential load R
L
>
32 Ω . This is because OUTMV amplifier can drive a maximum load of 16 Ω only (only one driver used) or a
parallel combination of two 32- Ω loads (both drivers used). If both OUTP2 and OUTP3 are used simultaneously,
they are muted at the same time if MUTE is selected.
Otherwise, the OUTMV pin is configured as the virtual ground for single-ended output and equal to the common
mode voltage at 1.35 V.
Figure 24. OUTP1/OUTM1 Output
Figure 25. Single-Ended/Differential Connection of OUTP2/OUTP3 Output
Analog Output Configuration
SPEAKER DRIVER CONFIGURATION NO. OF SPEAKER DRIVERS ON MIN LOAD
Single-ended 1 16- Ω
Single-ended 2 32- Ω
Differential 1 16- Ω
25
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