TPA005D12 Class-D EVM Performance Characteristics
3.6 TPA005D12
The TPA005D12
The frequency response shown in Figure 3±17 is a relatively flat 20 dB over the 20 Hz to 100 kHz frequency range. The lower and upper frequency corners can be adjusted to extend the frequency response.
Figure 3±11.
VOLTAGE AMPLIFICATION
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| 22.5 |
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| 20 |
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dB | 17.5 |
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15 |
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Amplification | 12.5 |
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10 |
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7.5 |
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Voltage | 5 |
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2.5 |
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| 0 | VDD = 5 V |
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| ±2.5 | RL = 4 Ω |
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| TA = 25° C |
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| ±5 |
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| 10 | 100 | 1k | 10k | 100k |
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| f ± Frequency ± Hz |
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Total harmonic distortion plus noise (THD+N) versus output power and frequency is shown in Figures 3±12 through 3±15 below. Figures 3±12 and 3±13 show power sweeps at a fixed frequency of 1 kHz. Switching and input noise begins to dominate at low power, while the distortion at the mid to upper power levels is a function of the
Midrange distortion is a combination of the switching noise of the output power transistors in the IC and the magnetic field created by the inductors. This distortion is minimized by good separation of the output filter inductors for each channel and through good
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