LM4861M National Semiconductor, LM4861M Datasheet - Page 4

• Manufacturer Part Number: LM4861M
• Description: Audio Power Amplifier IC
• Manufacturer: National Semiconductor

Specifications of LM4861M

• No. Of Channels: 1
• Output Power: 1.1W
• Load Impedance: 8ohm
• Amplifier Case Style: SOIC
• No. Of Pins: 8
• Output Power Pout: 1.1W
• Mounting Type: Surface Mount
• Supply Voltage Min: 2V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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1. R
2. C
3. R
4. C
5. C
6. C
Note 9: Optional component dependent upon specific design requirements. Refer to the Application Information section for more information.
External Components Description
Typical Performance Characteristics
THD+N vs Frequency
THD+N vs Output Power
Components
i
i
f
S
B
f
(Note 9)
Inverting input resistance which sets the closed-loop gain in conjunction with R
high pass filter with C
Input coupling capacitor which blocks DC voltage at the amplifier’s input terminals. Also creates a highpass
filter with R
Feedback resistance which sets closed-loop gain in conjunction with R
Supply bypass capacitor which provides power supply filtering. Refer to the Application Information
section for proper placement and selection of supply bypass capacitor.
Bypass pin capacitor which provides half supply filtering. Refer to the Application Information section for
proper placement and selection of bypass capacitor.
C
high frequency oscillation bursts.
f
in conjunction with R
DS011986-8
DS011986-5
i
at f
C
= 1/(2 R
i
at f
THD+N vs Frequency
THD+N vs Output Power
f
creates a low-pass filter which bandwidth limits the amplifier and prevents possible
C
i
= 1/(2 R
C
i
).
f
C
i
( Figures 1, 2 )
= 1/(2 R
C
i
).
Functional Description
4
f
C
f
)
DS011986-9
DS011986-6
THD+N vs Frequency
THD+N vs Output Power
i
.
f
. This resistor also forms a
DS011986-10
DS011986-7