National Semiconductor LM4926 Ground-Referenced, Ultra Low Noise, Fixed Gain, 80mW Stereo Headphone Amplifier Data Sheet
Summary
This highly efficient, ground-referenced stereo headphone amplifier provides reliable 80mW output with ultra-low noise for demanding portable electronics. Designed for applications like mobile phones and MP3 players where minimal power draw is essential, its unique features eliminate external coupling capacitors and reduce audible pops. The comprehensive manual guides designers through its performance specifications, low-power standby modes, advanced pop & click circuitry, and ideal integration into battery-operated devices.
Manual Details
| Brand | National |
|---|---|
| Pages | 22 |
| File Size | 1.54 MB |
| Published | May 30, 2026 |
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Frequently Asked Questions
Does the LM4926 require external capacitors for normal operation?
No, it is designed to eliminate output coupling and bootstrap capacitors needed in other audio amplifiers.
How does the amplifier manage power consumption when idle?
It features an Automatic Standby Mode that enters a low current standby after about 12 seconds with no input signal.
What voltage range should be used for this device to function properly?
The LM4926 operates optimally within a supply voltage range of 1.6V to 4.2V.
Does the amplifier generate noise during power transitions?
No, advanced pop & click circuitry is implemented to eliminate noises that typically occur during turn-on and turn-off transitions.