Thd+N Vs Voltage (600 Ω) - Texas Instruments DRV601EVM User Manual

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6.1 THD+N vs Voltage (600-Ω Load)
10
0.5
0.2
0.1
0.05
0.02
0.01
0.005
0.002
0.001
The THD+N from 10m Vrms to approximately 0.5 Vrms is dominated by noise.
0.005
0.002
0.001
Here the THD+N versus output voltage is shown with linear scale, this makes it easier to see where
clipping occurs. Clipping is often defines as THD+N=1%. For the DRV601 this is 2.25 Vrms with a 3.3-V
supply and 600-Ω load.
SLOU215 – January 2008
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5
2
1
10m 20m 50m
V - Output Voltage - Vrms
Figure 6. THD+N vs Voltage (600 Ω)
10
5
1.8 V DVDD
2
1
0.5
0.2
0.1
0.05
0.02
0.01
250m 500m750m 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75
V - Output Voltage - Vrms
Figure 7. THD+N vs Voltage (600 Ω)
1.8 V DVDD
3.3 V DVDD
4.5 V DVDD
100m 200m 500m
O
3.3 V DVDD
O
DRV601EVM Performance
1 2 4
4.5 V DVDD
4
DRV601EVM 9