TLV320AIC3262_14 Datasheet, PDF (34/65 Pages) Texas Instruments – Ultra Low Power Stereo Audio Codec With miniDSP, DirectPath Headphone, and Stereo Class-D Speaker Amplifier

TLV320AIC3262
SLAS679 – DECEMBER 2011
www.ti.com
TOTAL HARMONIC DISTORTION+NOISE
vs
HEADPHONE (GCHP) OUTPUT POWER
9dB Gain
TOTAL HARMONIC DISTORTION+NOISE
vs
DIFFERENTIAL RECEIVER OUTPUT POWER
32Ω Load
0
CM=0.75v,32Ohm,
−10 _{HVDD=CPVDD=1.5V}
−20
−30
−40
−50
−60
−70
−80
0
CM=0.75v,16Ohm,
HVDD=CPVDD=1.5V
CM=0.9v,32Ohm,
HVDD=CPVDD=1.8V
CM=0.9v,16Ohm,
HVDD=CPVDD=1.8V
10
20
30
40
50
60
70
Output Power (mW)
G007
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
0
CM=0.75V,
CM=0.9V,
RECVDD=1.65V RECVDD=1.8V
CM=1.25V,
RECVDD=2.5V
CM=1.5V,
RECVDD=3V
CM=1.65V,
RECVDD=3.3V
20 40 60 80 100 120 140 160 180
Output Power (mW)
G008
Figure 16.
Figure 17.
DIFFERENTIAL RECEIVER SNR AND OUTPUT POWER
vs
OUTPUT COMMON MODE SETTING
32Ω Load
120
150
110
125
SNR
100
100
90
75
80
Output Power
50
70
25
60
0.8
1.0
1.2
1.4
Output Common Mode Setting (V)
Figure 18.
0
1.6
G009
Class-D Driver Performance
TOTAL HARMONIC DISTORTION + NOISE
vs
OUTPUT POWER
Different Gain Settings, 8Ω Load,
SLVDD=SRVDD=SPK_V=3.6V
0
−10
−20
−30
−40
12dB
24dB
−50
18dB 30
−60
−70
−80
0
6dB
200
400
600
800
Output Power (mW)
Figure 19.
1000
1200
G010
TOTAL HARMONIC DISTORTION + NOISE
vs
OUTPUT POWER
Different SLVDD/SRVDD/SPK_V Supplies, 8Ω Load, 12dB
Gain
0
2.7V 3.6V 4.2V 5.0V 5.5v
−10
−20
−30
−40
−50
−60
−70
−80
0
200 400 600 800 1000 1200 1400 1600 1800
Output Power (mW)
G011
Figure 20.
34
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