參數(shù)資料
型號: LM4550BVHX/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 消費家電
英文描述: LM4550B AC '97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 1000/Reel
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝: 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48
文件頁數(shù): 29/31頁
文件大小: 998K
代理商: LM4550BVHX/NOPB
Typical Application
APPLICATION HINTS
The LM4550B must be initialized by using RESET# to perform a Power On Reset as shown in the Power On Reset Timing
Diagram
Don’t leave unused Analog inputs floating. Tie all unused inputs together and connect to Analog Ground through a capacitor
(e.g. 0.1 F)
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) througha1F capacitor
If using a non-standard AC Link controller take care to keep the SYNC and SDATA_OUT signals low during Cold Reset to
avoid accidentally activating the ATE or Vendor test modes
The PC_Beep input should be explicitly muted if not used since it defaults to 0 dB gain on reset, unlike the mute default of the
other analog inputs
20123703
FIGURE 1. LM4550B Typical Application Circuit, Single Codec, 1 Vrms inputs
LM4550B
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