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OP176GBC Folha de dados(PDF) 8 Page - Analog Devices |
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OP176GBC Folha de dados(HTML) 8 Page - Analog Devices |
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8 / 21 page  OP176 REV. 0 –8– APPLICATIONS Short Circuit Protection The OP176 has been designed with output short circuit protection. The typical output drive current is ±50 mA. This high output current and wide output swing combine to yield an excellent audio amplifier, even when driving large signals, at low power and in a small package. Total Harmonic Distortion Total Harmonic Distortion + Noise (THD + N) of the OP176 is well below 0.001% with any load down to 600 Ω. However, this is dependent upon the peak output swing. In Figure 23 it is seen that the THD + Noise with 3 V rms output is below 0.001%. In the following Figure 24, THD + Noise is below 0.001% for the 10 k Ω and 2 kΩ loads but increases to above 0.01% for the 600 Ω load condition. This is a result of the output swing capability of the OP176. Notice the results in Figure 25, showing THD vs. V IN (V rms). FIGURE 23. THD + Noise vs. Frequency 0.1 0.010 0.001 0.0001 20 100 1k 10k 20k ±V S = ±18V VO = 10Vrms Ω600Ω 2k Ω 10k Ω Figure 24. THD + Noise vs. R LOAD Figure 25. THD + Noise vs. Output Amplitude (V rms) The output of the OP176 is designed to maintain low harmonic distortion while driving 600 Ω loads. However, driving 600 Ω loads with very high output swings results in higher distortion if clipping occurs. To attain low harmonic distortion with large output swings, supply voltages may be increased. Figure 26 shows the perfor- mance of the OP176 driving 600 Ω loads with supply voltages varying from ±18 volts to ±20 volts. Notice that with ±18 volt supplies the distortion is fairly high, while with ±20 volt supplies it is a very low 0.0007%. 0.1 0.010 0.001 0.0001 20 100 1k 10k 20k ΩR L = 600Ω VO = ±18V VO = ±20V VO = ±19V VO = ±22V Figure 26. THD + Noise vs. Supply Voltage ±V S = ±15V VO = 3Vrms 0.1 0.010 0.001 .0001 20 100 1k 10k 20k Ω600Ω 0.1 0.010 0.001 .0001 20 100 1k 10k 20k ±V S = ±18V ΩR L = 600Ω Ω10Vrms Ω5Vrms Ω3Vrms Ω1Vrms |
Nº de peça semelhante - OP176GBC |
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Descrição semelhante - OP176GBC |
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