LM4859TL/NOPB vs LM4844TL/NOPB
| Part Number |
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| Category | Linear - Amplifiers - Audio | Linear - Amplifiers - Audio |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC AMP CLASS AB STER 1.6W 30USMD | IC AMP CLSS AB STER 1.2W 30DSBGA |
| Package | Bulk | Bulk |
| Series | Boomer® | Boomer® |
| Type | Class AB | Class AB |
| Features | 3D, Depop, I²C, Mute, Shutdown, Thermal Protection, Volume Control | 3D, Depop, I²C, Mute, Shutdown, Volume Control |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 30-WFBGA | 30-WFBGA, DSBGA |
| Supplier Device Package | 30-DSBGA | 30-DSBGA |
| Output Type | 2-Channel (Stereo) with Stereo Headphones | 2-Channel (Stereo) with Stereo Headphones |
| Max Output Power x Channels @ Load | 1.6W x 2 @ 4Ohm; 75mW x 2 @ 32Ohm | 1.2W x 2 @ 8Ohm; 80mW x 2 @ 32Ohm |
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1. What is an audio amplifier and what does it do?
An audio amplifier is a device that amplifies an audio signal, such as music or speech, to a higher voltage or current level to drive speakers or headphones, ensuring that the sound remains clear and accurate when played at higher volumes.
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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 a Class D audio amplifier and what are its advantages?
Class D audio amplifiers work through Pulse Width Modulation (PWM) technology and have extremely high efficiency (typically up to 90% or higher), making them suitable for use in portable audio equipment or high-efficiency sound systems. It generates less heat because it reduces energy consumption.
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4. 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.
