Details

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BUY LM4808MX https://www.utsource.net/itm/p/6939551.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Supply Voltage	VDD	2.7	5	5.5	V	Operating supply voltage range
Quiescent Current	IQ	-	10	-	mA	Current consumed in standby mode
Output Power	POUT	-	360	-	mW	Maximum output power into 8Ω load
THD+N	-	-	0.5	-	%	Total harmonic distortion plus noise
PSRR	-	-	70	-	dB	Power supply rejection ratio at 217 Hz
SNR	-	-	94	-	dB	Signal-to-noise ratio
Shutdown Current	ISD	-	0.5	-	μA	Current consumed in shutdown mode
Operating Temperature	TOPR	-40	-	85	°C	Operating temperature range

Instructions for LM4808MX

1. Supply Voltage Setup:

   • Ensure the supply voltage (VDD) is within the specified range of 2.7V to 5.5V to avoid damage or improper operation.

2. Quiescent and Shutdown Current Management:

   • The quiescent current is typically 10mA, which should be considered for power budgeting.
   • Use the shutdown pin to reduce current consumption to approximately 0.5μA when not in use.

3. Output Configuration:

   • Connect the output to an 8Ω speaker load to achieve the maximum output power of 360mW.
   • Ensure proper decoupling capacitors are used on the power supply lines to minimize noise and improve stability.

4. Performance Optimization:

   • For optimal performance, maintain a low THD+N of 0.5% by ensuring clean power supply and appropriate PCB layout.
   • Achieve a high SNR of 94dB by placing components carefully to avoid signal interference.

5. Operating Temperature Considerations:

   • Operate within the temperature range of -40°C to +85°C to ensure reliable performance and longevity.

6. Power Supply Rejection Ratio (PSRR):

   • Take advantage of the 70dB PSRR to mitigate the effects of power supply ripple on audio quality.

7. Layout Guidelines:

   • Follow recommended PCB layout practices to minimize parasitic inductance and capacitance that can affect performance.

(For reference only)