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AN3383 Datasheet(PDF) 4 Page - STMicroelectronics |
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AN3383 Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 29 page Functional description of the demonstration board AN3383 4/29 Doc ID 018691 Rev 1 1 Functional description of the demonstration board The following terms used in this application note are defined as follows: ● THD+N vs. Freq: Total harmonic distortion plus noise versus frequency curve ● THD+N vs. Pout: Total Harmonic Distortion (THD) plus noise versus output power ● S/N ratio: Signal-to-noise ratio ● FFT: Fast Fourier Transform Algorithm (method) ● CT: Channel separation L to R, or R to L channel crosstalk The equipment used includes the following: ● Audio Precision (System 2700) by AP Co., USA) ● DC power supply (4.5 V to 26 V) ● Digital oscilloscope (TDS3034B by Tektronix) ● PC (with APWorkbench GUI control software installed) 1.1 Connections Power supply signal and interface connection 1. Connect the positive voltage of 24V DC power supply to the +Vcc pin and negative to GND. 2. Connect the APWorkbench board to the J1 connector of the STA350BW demonstration board. 3. Connect the S/PDIF signal cable to the RCA jack on the APWLink board, connecting to the signal source such as Audio precision or DVD player. Note: The voltage range of the DC power supply for VCC is 4.5 V to 26 V. 1.2 Output configuration The STA350BW demo board is specifically configured in 2 BTL channels. For the software setup, please refer to the APWUserManualR1.0.pdf. |
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