SA58631TK,157 vs LM4861MX/NOPB
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | NXP USA Inc. | Texas Instruments |
| Description | IC AMP CLASS AB MONO 3W 8HVSON | IC AMP CLASS AB MONO 1.5W 8SOIC |
| Package | Tape & Reel (TR) | Cut Tape (CT) |
| Series | - | Boomer® |
| Type | Class AB | Class AB |
| Features | Depop, Mute, Short-Circuit and Thermal Protection, Standby | Shutdown, Thermal Protection |
| Voltage - Supply | 2.2V ~ 18V | 2V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 8-VDFN Exposed Pad | 8-SOIC (0.154\", 3.90mm Width) |
| Supplier Device Package | 8-HVSON (4x4) | 8-SOIC |
| Output Type | 1-Channel (Mono) | 1-Channel (Mono) |
| Max Output Power x Channels @ Load | 3W x 1 @ 8Ohm | 1.5W x 1 @ 8Ohm |
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1. What types of audio amplifiers are available?
Common types of audio amplifiers include:
Class A amplifiers: have the highest sound quality, but are less efficient.
Class B amplifiers: More efficient, but may produce crossover distortion.
Class AB amplifiers: between Class A and Class B with good balance.
Class D amplifier: highest efficiency, suitable for portable devices, but slightly lower sound quality. -
2. What is the Total Harmonic Distortion (THD) of an audio amplifier?
Total Harmonic Distortion (THD) is the distortion component introduced by an audio amplifier during the signal amplification process. the lower the THD, the closer the amplified audio signal will be to the original signal, and usually high quality audio amplifiers have a THD value of less than 1%.
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3. What is the signal-to-noise ratio (SNR) of an audio amplifier?
Signal-to-noise ratio (SNR) is a measure of the ratio of the audio signal to the background noise, with higher values indicating less noise in the audio signal. A high SNR usually means clearer sound output.
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4. Does the audio amplifier need to match the impedance of the speakers?
Yes, the output impedance of the audio amplifier should match the impedance of the speaker. Typically speakers have an impedance of 4Ω, 8Ω or 16Ω. Matching the impedance ensures that the amplifier delivers maximum power and the best sound quality from the speaker.
