LM4831VF National Semiconductor, LM4831VF Datasheet
LM4831VF
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LM4831VF Summary of contents
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... Beep circuitry for “wake-up” while in shutdown n 44 Pin TQFP Packaging Applications n Portable and Desktop Computers Connection Diagram DS100057-1 See NS Package Number VEJ44A DS100057 August 2000 0.6% (typ) 10µV (typ) 16mA (typ) 2µA (typ) DS100057-3 Top View Order Number LM4831VF www.national.com ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) Junction Temperature Soldering Information Small Outline Package ...
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Electrical Characteristics (Notes 1, 2) The following specifications apply for V measurements represent the full audio chain from Input A of each channel to their respective output. Limits apply for T = 25˚C. A Symbol Parameter THD Total Harmonic Distortion ...
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Typical Application www.national.com FIGURE 3. Typical Application Circuit 4 DS100057-2 ...
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Pin Descriptions VDDA This is the analog power supply pin which powers all internal circuitry, with the exceptions of the output amplifiers and the digital logic in the Beep and Switching circuit sections. This pin should be connected to the ...
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Pin Descriptions (Continued) PWRDWN This pin is used to power down the entire IC (except BEEP Circuitry). Placing a logic high on the PWRDWN pin will place the LM4831 in a low supply current state. To minimize the shutdown-mode supply ...
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Pin Descriptions (Continued) MIC+IN This pin is the positive input of the microphone amplifier. The microphone amplifier is typically configured as an inverting amplifier, so this pin should be connected to the BYPASS pin to properly bias the amplifier. Further, ...
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Typical Performance Characteristic THD+N vs Frequency DS100057-17 THD+N vs Output Power DS100057-14 Power Amplifier Noise Floor DS100057-28 Power Amplifier Crosstalk to Mic www.national.com (Continued) THD+N vs Output Power DS100057-11 THD+N vs Output Power DS100057-15 Power Amplifer Crosstalk, Bridged DS100057-13 Power ...
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Typical Performance Characteristic Power Dissipation, Bridged DS100057-25 Ouput Power vs Supply Voltage Bridged DS100057-24 Microphone THD+N vs Frequency DS100057-19 (Continued) Power Dissipation, Single-Ended Ouput Power vs Supply Voltage Single-Ended DS100057-27 Microphone THD+N vs Output Level DS100057-18 9 DS100057-26 Output Power ...
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Typical Performance Characteristic Line Out THD+N vs Frequency DS100057-9 Equalizer Output Noise Floor Application Information GROUNDING Certain grounding techniques should be followed when lay- ing out the LM4831 circuit. Figure 4 shows how to setup the grounds for the LM4831. ...
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Application Information sible. For low frequency considerations, a 10µF or greater tantalum or electrolytic capacitor should be paralleled with the high frequency bypass capacitor. If power supply bypass capacitors are not sufficiently large, the current in the power supply leads, ...
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Application Information LM4831. The microphone input pin is connected to the in- verting node of a CMOS op amp, so the input impedance is > very high ( 10M ) BEEP CIRCUITRY The beep circuitry is designed to allow a ...
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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted 44-Lead Thin Quad Flat Package Order Number LM4831VF NS Package Number VEJ44A 2. A critical component is any component of a life ...