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參數(shù)資料
| 型號(hào)： | LM4550VHX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 X 1.40 MM, LQFP-48 |
| 文件頁數(shù)： | 28/30頁 |
| 文件大小： | 611K |
| 代理商： | LM4550VHX/NOPB |
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Typical Application
APPLICATION HINTS
The LM4550 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
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
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
10097203
FIGURE 1. LM4550 Typical Application Circuit, Single Codec, 1 Vrms inputs
LM4550
www.national.com
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