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LM48556 Datasheet(PDF) 12 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM48556
Description  Fully Differential, Mono, Ceramic Speaker Driver
PDF  20 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM48556 Datasheet(HTML) 12 Page - National Semiconductor (TI)

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f = 1 / 2
πR
INCIN
(Hz)
(3)
Where the value of R
IN is determined by equation (1) in the
Gain Setting Resistor Selection section.
When the LM48556 is using a single-ended source, power
supply noise on the ground is seen as an input signal. Setting
the high-pass filter point above the power supply noise fre-
quencies, 217Hz in a GSM phone, for example, filters out the
noise such that it is not amplified and heard on the output.
Capacitors with a tolerance of 1% or better are recommended
for impedance matching and improved CMRR and PSRR.
SINGLE-ENDED AUDIO AMPLIFIER CONFIGURATION
The LM48556 is compatible with single-ended sources. Fig-
ure 2 shows the typical single-ended applications circuit. In
30057286
FIGURE 2. Single-Ended Input Configuration
www.national.com
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