LM4811 Texas instruments

LM4811

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LM4811

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Описание

The LM4811 is a dual audio power amplifier capable of delivering 105mW per channel of continuous average power into a 16Ω load with 0.1% (THD+N) from a 5V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4811 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4811 features a digital volume control that sets the amplifier's gain from +12dB to −33dB in 16 discrete steps using a two−wire interface. The unity-gain stable LM4811 also features an externally controlled, active-high, micropower consumption shutdown mode. It also has an internal thermal shutdown protection mechanism.

Digital Volume Control Range from +12dB to −33dB
WSON and VSSOP Surface Mount Packaging
"Click and Pop" Suppression Circuitry
No Bootstrap Capacitors Required
Low Shutdown Current

Key Specifications

THD+N at 1kHz, 105mW Continuous Average Output Power into 16Ω 0.1 % (typ)
THD+N at 1kHz, 70mW Continuous Average Power into 32Ω 0.1 % (typ)
Shutdown Current 0.3 μA (typ)

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Output power (W)	0.105
Analog supply (min) (V)	2
Analog supply (max) (V)	5.5
Load (min) (Ω)	16
PSRR (dB)	60
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Headphone channels	Stereo
Volume control	Yes
Shutdown current (ISD) (µA)	0.3
Architecture	Class-AB
Iq per channel (typ) (mA)	0.65