LM4917MTX/NOPB vs LMV1091TM/NOPB
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC AMP CLSS AB STER 95MW 14TSSOP | IC AMP CLASS AB STEREO 25USMD |
| Package | Tray | Tape & Reel (TR) |
| Series | Boomer® | - |
| Type | Class AB | Class AB |
| Features | Depop, Short-Circuit and Thermal Protection, Shutdown | Differential Inputs, Microphone, Shutdown |
| Voltage - Supply | 1.4V ~ 3.6V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 14-TSSOP (0.173\", 4.40mm Width) | 25-WFBGA |
| Supplier Device Package | 14-TSSOP | 25-µSMD (2.02x2.02) |
| Output Type | Headphones, 2-Channel (Stereo) | 2-Channel (Stereo) |
| Max Output Power x Channels @ Load | 95mW x 2 @ 16Ohm | - |
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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 a power amplifier and how is it different from an audio amplifier?
A power amplifier is a type of audio amplifier designed to drive high-power loads such as speakers. It is capable of amplifying audio signals to a sufficient power output to drive speakers to produce greater volume.
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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.
