Details

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BUY LM1815N https://www.utsource.net/itm/p/464959.html
LM1815 - Adaptive Variable Reluctance Sensor Amplifier, Package: Soic Narrow, Pin Nb=14

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	Vcc	4.5	-	30	V
Quiescent Current	IQ	-	2.5	3.5	mA
Output Power (into 8Ω)	Pout	-	700	-	mW
Total Harmonic Distortion	THD	-	10	-	% (1 kHz)
Signal-to-Noise Ratio	SNR	-	60	-	dB
Input Sensitivity	Vin	-	200	-	mV (1 kHz)
Operating Temperature	Toper	-40	-	85	°C
Storage Temperature	Tstg	-65	-	150	°C

Instructions for Using LM1815N

1. Power Supply:

   • Connect the positive supply voltage (Vcc) to pin 8.
   • Connect the negative supply voltage (GND) to pin 4.

2. Input Connection:

   • Connect the audio input signal to pin 5 (IN+).
   • Connect the ground of the input signal to pin 4 (GND).

3. Output Connection:

   • Connect the speaker or load to pin 6 (OUT).
   • Ensure the load impedance is at least 8Ω to avoid damage.

4. Decoupling Capacitors:

   • Place a 10μF electrolytic capacitor between Vcc and GND close to the IC to stabilize the power supply.
   • Optionally, place a 0.1μF ceramic capacitor between Vcc and GND for high-frequency noise filtering.

5. Biasing:

   • The internal biasing circuitry ensures proper operation without external components. However, for optimal performance, a 10kΩ resistor can be connected from pin 7 (BIAS) to GND.

6. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high power levels or in high ambient temperatures.
   • Use a heatsink if necessary, especially when driving low-impedance loads.

7. Handling Precautions:

   • Handle the IC with care to avoid static damage.
   • Follow proper soldering techniques to prevent thermal stress on the IC.

8. Testing:

   • Apply a 1kHz sine wave to the input and measure the output across the speaker.
   • Adjust the input level to achieve the desired output power while monitoring distortion levels.

9. Storage:

   • Store the IC in a dry, cool environment to prevent moisture damage.
   • Keep the IC in its original packaging until ready for use.

(For reference only)