Part Number:TAS5709
Hi, team,
My customer is using TAS5709, found THD+N is very large when the Master volume is small. As the red font shown in the following table. For example, when the Master Volume= 0x72, THD+N reaches 80.1%. This should not be related to noise. Please help to analyze the issue, thank you!
Input Signal | Master Volume | L | R | ||
Output Power (W) | THD+N (%) | Output Power (W) | THD+N (%) | ||
1000Hz_-9dB.wav | 0x24 | 8.21 | 0.423 | 8.11 | 0.341 |
1000Hz_-9dB.wav | 0x27 | 5.887 | 0.306 | 5.797 | 0.237 |
1000Hz_-9dB.wav | 0x2A | 4.192 | 0.214 | 4.131 | 0.161 |
1000Hz_-9dB.wav | 0x2D | 2.984 | 0.155 | 2.93 | 0.117 |
1000Hz_-9dB.wav | 0x30 | 2.116 | 0.12 | 2.081 | 0.09 |
1000Hz_-9dB.wav | 0x33 | 1.502 | 0.103 | 1.473 | 0.075 |
1000Hz_-9dB.wav | 0x36 | 1.064 | 0.08 | 1.045 | 0.057 |
1000Hz_-9dB.wav | 0x39 | 0.756 | 0.052 | 0.739 | 0.041 |
1000Hz_-9dB.wav | 0x3C | 0.536 | 0.04 | 0.526 | 0.034 |
1000Hz_-9dB.wav | 0x3F | 0.3784 | 0.033 | 0.3715 | 0.031 |
1000Hz_-9dB.wav | 0x42 | 0.2675 | 0.031 | 0.2631 | 0.03 |
1000Hz_-9dB.wav | 0x45 | 0.1894 | 0.032 | 0.1859 | 0.032 |
1000Hz_-9dB.wav | 0x48 | 0.134 | 0.0031 | 0.132 | 0.031 |
1000Hz_-9dB.wav | 0x4B | 0.0949 | 0.034 | 0.0931 | 0.034 |
1000Hz_-9dB.wav | 0x4E | 0.067 | 0.039 | 0.066 | 0.038 |
1000Hz_-9dB.wav | 0x51 | 0.0475 | 0.04 | 0.0467 | 0.04 |
1000Hz_-9dB.wav | 0x54 | 0.0337 | 0.06 | 0.0331 | 0.06 |
1000Hz_-9dB.wav | 0x57 | 0.0239 | 0.07 | 0.0235 | 0.07 |
1000Hz_-9dB.wav | 0x5A | 0.017 | 0.08 | 0.0167 | 0.08 |
1000Hz_-9dB.wav | 0x5D | 0.012 | 0.094 | 0.012 | 0.096 |
1000Hz_-9dB.wav | 0x60 | 0.0086 | 0.11 | 0.0085 | 0.11 |
1000Hz_-9dB.wav | 0x63 | 0.0061 | 0.11 | 0.006 | 0.13 |
1000Hz_-9dB.wav | 0x66 | 0.0044 | 0.13 | 0.0043 | 0.13 |
1000Hz_-9dB.wav | 0x69 | 0.0032 | 0.15 | 0.0031 | 0.15 |
1000Hz_-9dB.wav | 0x6C | 0.0023 | 0.17 | 0.0023 | 0.17 |
1000Hz_-9dB.wav | 0x6F | 1.69 mW | 0.8 | 1.67 mW | 1.7 |
1000Hz_-9dB.wav | 0x72 | 1.25 mW | 20 | 1.25 mW | 40 |
1000Hz_-9dB.wav | 0x7B | 580 uW | 80.1 | 590 uW | 78.7 |
1000Hz_-9dB.wav | 0x7E | 470 uW | 74 | 483 uW | 72 |
1000Hz_-9dB.wav | 0x87 | 303 uW | 55.3 | 318 uW | 53.6 |
1000Hz_-9dB.wav | 0x8D | 256 uW | 42 | 272 uW | 40.6 |
1000Hz_-9dB.wav | 0x96 | 225 uW | 26.8 | 243 uW | 25.7 |
1000Hz_-9dB.wav | 0x99 | 220 uW | 22.8 | 237 uW | 21.8 |
1000Hz_-9dB.wav | 0x9C | 216 uW | 19.3 | 235 uW | 18.5 |
1000Hz_-9dB.wav | 0xAE | 212 uW | 7 | 227 uW | 6.7 |
1000Hz_-9dB.wav | 0xBD | 211 uW | 2.9 | 227 uW | 2.7 |
1000Hz_-9dB.wav | 0xC0 | 210 uW | 2.43 | 226 uW | 2.3 |
1000Hz_-9dB.wav | 0xC3 | 210 uW | 2.03 | 226 uW | 1.95 |
1000Hz_-9dB.wav | 0xC6 | 210 uW | 1.72 | 226 uW | 1.65 |
1000Hz_-9dB.wav | 0xC9 | 210 uW | 1.48 | 226 uW | 1.42 |
1000Hz_-9dB.wav | 0xCC | 209 uW | 1.26 | 226 uW | 1.21 |