LM4819MX National Semiconductor, LM4819MX Datasheet - Page 13
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LM4819MX
Manufacturer Part Number
LM4819MX
Description
IC AMP AUDIO PWR .35W MONO 8SOIC
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Specifications of LM4819MX
Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
350mW x 1 @ 16 Ohm
Voltage - Supply
2 V ~ 5.5 V
Features
Depop, Differential Inputs, Shutdown
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
LM4819MXTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4819MX
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM4819MX/NOPB
Manufacturer:
TI
Quantity:
6 700
www.national.com
Application Information
The LM4819 is unity-gain stable and requires no external
components besides gain-setting resistors, an input coupling
capacitor, and proper supply bypassing in the typical appli-
cation. However, if a closed-loop differential gain of greater
than 10 is required, a feedback capacitor (C
needed as shown in Figure 2 to bandwidth limit the amplifier.
This feedback capacitor creates a low pass filter that elimi-
nates possible high frequency oscillations. Care should be
FIGURE 2. HIGHER GAIN AUDIO AMPLIFIER
(Continued)
4
) may be
12
taken when calculating the -3dB frequency in that an incor-
rect combination of R
20kHz. A typical combination of feedback resistor and ca-
pacitor that will not produce audio band high frequency rolloff
is R
-3dB point of approximately 320 kHz. It is not recommended
that the feedback resistor and capacitor be used to imple-
ment a band limiting filter below 100kHz.
3
= 20kΩ and C
4
= 25pF. These components result in a
3
and C
20013624
4
will cause rolloff before