LM4865M National Semiconductor, LM4865M Datasheet - Page 4

• Manufacturer Part Number: LM4865M
• Description: IC, AUDIO PWR AMP, CLASS AB 750mW, SOIC8
• Manufacturer: National Semiconductor

Specifications of LM4865M

• Audio Control Type: Volume
• Output Power: 1W
• Control / Process Application: GSM Phones And Accessories, DECT, Office Phones, Hand Held Radio
• Supply Voltage Range: 2.7V To 5.5V
• No. Of Channels: 1
• Thd + N: 0.6% @ 8ohm, VDD=5V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: MSOP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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External Components Description
Typical Performance Characteristics
(Figure 1 )
Components
1.
2.
3.
C
C
C
S
B
i
THD+N vs Output Power
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. It also creates a
highpass filter with the internal R
1/(2πR
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the section, Proper Selection of
External Components, for information concerning proper placement and selection of C
determine the value of C
THD+N vs Frequency
i
C
i
). Refer to the section, Proper Selection of External Components, for an explanation of how to
i
.
10102505
10102507
i
. The designer should note that10kOhm
Functional Description
4
THD+N vs Output Power
THD+N vs Frequency
<
(Ri)
<
110kOhm.Therefore f
B
.
10102506
10102508
c
=