lm4834 National Semiconductor Corporation, lm4834 Datasheet
lm4834
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lm4834 Summary of contents
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... DC volume control, and a bridged audio power amplifier capable of producing 1.75W into 4Ω with less than 1.0% (THD). In addition, the headphone/lineout amplifier is ca- pable of driving 70 mW into 32Ω with less than 0.1%(THD). The LM4834 incorporates a volume control and an input microphone preamp stage capable of driving a 1 kΩ load impedance. Boomer ® ...
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... LM4834 Typical Limit (Note 6) (Note 7) 4.5 5.5 17.5 26 0.6 2.0 LM4834 Typical Limit (Note 6) (Note 7) 2.6 3.65 -75 -88 -92 -105 -92 -105 = 25˚C. A LM4834 Typical Limit (Note 6) (Note 7) 0.9 = 123 OUT = 1 kΩ 4.72 1.2 28 220˚C 29˚C/W 95˚C/W ≤ 5.5V Units (Limits) V (min) V (max) mA (max) µA (max) Units (Limits) dB (max) dB (min) ...
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... R = 32Ω 1.0 µ 120 Hz,V B RIPPLE 200 mVmrs 1.1W OUT A-Wtd Filter − T )/θ .For the LM4834MS 150˚C, and the typical junction-to-ambient thermal resistance, when board A JA JMAX 3 = 25˚C. A LM4834 Typical Limit (Note 6) (Note 7) 2.5 2.5 LM4834 Typical ...
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Typical Application Truth Table for Logic Inputs Mode Mute www.national.com FIGURE 2. Typical Application Circuit HP Sense DC Vol. Control Line/HP Left 0 Adjustable Fixed Level 1 Adjustable ...
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External Components Description Components Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a high i pass filter with explanation of how to determine the value ...
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Typical Performance Characteristics THD+N vs Frequency Bridge Power Amp THD+N vs Frequency Line Out/HP Amplifiers THD+N vs Output Power Bridged Power Amp www.national.com (Continued) THD+N vs Frequency Line Out/HP Amplifiers 10001506 THD+N vs Frequency Line Out/HP Amplifiers 10001508 THD+N vs ...
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Typical Performance Characteristics THD+N vs Output Power Bridged Power Amp THD+N vs Output Power Line Out/HP Amplifiers Output Power vs Load Resistance Bridged Power Amp (Continued) THD+N vs Output Power 10001512 THD+N vs Output Power 10001514 10001516 7 Line Out/HP ...
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Typical Performance Characteristics Volume Control Characteristics Noise Floor Line Out/HP Amp Power Supply Rejection Ratio Bridged Power Amp www.national.com (Continued) 10001525 10001520 Line Out/HP Amplifiers 10001522 8 Noise Floor Bridged Power Amp 10001519 Noise Floor Mic Preamp 10001521 Power Supply ...
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Typical Performance Characteristics Power Supply Rejection Ratio Mic Preamp Power Dissipation vs Output Power Line Out/HP Amplifiers Power Derating Curve (Continued) 10001524 Low Frequency Enhancement 10001526 10001528 9 Power Dissipation vs Output Power Bridged Power Amp 10001518 Characteristics Bridged Power ...
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Typical Performance Characteristics Crosstalk Line Out/HP Amplifiers www.national.com (Continued) 10001530 10 ...
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... MUTE FUNCTION By placing a logic level high on the mute pin (pin 15), the Right and Left Sum Out pins will be muted. If the LM4834 is in the headphone mode, the HP/Line out pins as well as the Sum Out pins are muted. The mute pin must not be floated. ...
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... JA = 95˚C/W and T = The LM4834’s bridged amplifier should be used in low gain JMAX , of the configurations to minimize THD+N values, and maximize the A signal to noise ratio. Low gain configurations require large input signals to obtain a given output power. Input signals equal to or greater than 1Vrms are available from sources such as audio codecs ...
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... CLICK AND POP CIRCUITRY The LM4834 contains circuitry to minimize turn-on transients or “click and pops”. In this case, turn-on refers to either power supply turn-on or the device coming out of shutdown mode. When the device is turning on, the amplifiers are internally configured as unity gain buffers ...
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... English www.national.com Français Tel: +33 ( 8790 SSOP Package Order Number LM4834MS NS Package Number MSA028CB for SSOP 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...