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LM4549A Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM4549A
Descripción Electrónicos  AC ??7 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound
Download  28 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4549A Datasheet(HTML) 7 Page - National Semiconductor (TI)

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Typical Application
APPLICATION HINTS
The LM4549A must be initialized by using RESET# to perform a Power On Reset as shown in the Power On Reset Timing
Diagram
V
REF must be pulled high to AVDD witha10k
Ω resistor to ensure correct operation
Don’t leave unused inputs floating. Tie all unused inputs together and connect to Analog Ground through a capacitor (e.g. 0.1
µF)
Do not leave CD_GND floating when using the CD stereo input. CD_GND is the AC signal reference for the CD channels and
should be connected to the CD source ground (Analog Ground may also be acceptable) througha1µF capacitor
If using a non-standard AC Link controller take care to keep the SYNC and SDATA_IN signals low during Cold Reset to avoid
entering the ATE or Vendor test modes by mistake
The PC_Beep input should be muted if not used since it defaults to 0 dB gain on reset, unlike the mute default of the other
analog inputs
20029903
FIGURE 1. LM4549A Typical Application Circuit, Single Codec, 1 Vrms inputs
www.national.com
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