TLV320DAC3101_15 Datasheet, PDF (15/100 Pages) Texas Instruments – Low-Power Stereo Audio DAC With Audio Processing and Stereo Class-D Speaker Amplifier

TLV320DAC3101
www.ti.com
SLAS666A – JANUARY 2010 – REVISED MAY 2012
4.2 Class-D Speaker Driver Performance
TOTAL HARMONIC DISTORTION + NOISE
vs
OUTPUT POWER
0
AVDD = HPVDD = 3.3 V
−10 ^{IOVDD = 3.3 V}
SPLVDD = 5.5 V
DVDD = 1.8 V
−20 _{RL = 8 Ω}
−30
Driver Gain
= 24 dB
−40
Driver Gain
= 18 dB
−50
Driver Gain
= 12 dB
−60
Driver Gain
−70
= 6 dB
−80
0.0
0.5
1.0
1.5
2.0
PO − Output Power − W
G014
Figure 4-4. Max Class-D Speaker-Driver Output
Power
TOTAL HARMONIC DISTORTION + NOISE
vs
OUTPUT POWER
0
SPLVDD = 3.3 V
−10
−20
−30
SPLVDD = 3.6 V
−40
SPLVDD = 4.3 V
−50
−60
−70
−80
0.0
SPLVDD = 5.5 V
0.5
1.0
AVDD = 3.3 V
HPVDD = 3.3 V
IOVDD = 3.3 V
DVDD = 1.8 V
Gain = 18 dB
R_L = 8 Ω
1.5
2.0
PO − Output Power − W
G015
Figure 4-5. Class-D Speaker-Driver Output Power
4.3 Analog Bypass Performance
AMPLITUDE
vs
FREQUENCY
20
20
AVDD = HPVDD = 3.3 V
0
IOVDD = SPLVDD = 3.3 V
0
DVDD = 1.8 V
−20
−20
AMPLITUDE
vs
FREQUENCY
AVDD = HPVDD = 3.3 V
IOVDD = SPLVDD = 3.3 V
DVDD = 1.8 V
−40
−40
−60
−60
−80
−80
−100
−100
−120
−120
−140
−140
−160
0
5
10
15
20
f − Frequency − kHz
G024
Figure 4-6. FFT – Line-In Bypass to Line Output
−160
0
5
10
15
20
f − Frequency − kHz
G027
Figure 4-7. FFT – Line-In Bypass to Headphone
Output
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TYPICAL PERFORMANCE
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