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LM4549A bảng dữ liệu(PDF) 9 Page - Texas Instruments

tên linh kiện LM4549A
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OBSOLETE
LM4549
www.ti.com
SNOS987E – NOVEMBER 2002 – REVISED APRIL 2013
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
VREF must be pulled high to AVDD with a 10 kΩ 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)
through a 1 µF 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
Copyright © 2002–2013, Texas Instruments Incorporated
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