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參數(shù)資料
| 型號： | PNX3000 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Analog front end for digital video processors |
| 中文描述： | 模擬前端數(shù)字視頻處理器 |
| 文件頁數(shù)： | 43/51頁 |
| 文件大?。?/td> | 285K |
| 代理商： | PNX3000 |
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2004 Oct 04
43
Philips Semiconductors
Preliminary specification
Analog front end for digital video
processors
PNX3000
13 TEST AND APPLICATION INFORMATION
13.1
Power supply decoupling
For optimal THD and SNR performance of the analog and digital audio channels, it is important to have stable 5 V and
8 V supply voltages for the audio part of the PNX3000.
The following pins need a stable supply voltage without disturbances in the baseband audio frequency range:
Pins V
CC(1ASW)
and V
CC(2ASW)
(pins 98 and 88); the supply voltage for the analog audio switches. The supply current
to both of these pins is less than 5 mA. Note that this supply voltage may be 5 V or 8 V.
Pin VAADCP (pin 91); the 5 V full scale reference for the audio ADCs. The current consumption of this pin is about
0.25 mA. This pin must only be connected to the 5 V supply if an audio supply voltage (pins V
CC(1ASW)
and V
CC(2ASW)
)
of 5 V is used. If an audio supply of 8 V is used, this pin must not be connected to the 5 V supply voltage. In this case
the reference voltage is generated by the IC itself, and only a decoupling capacitor should be connected to this pin.
Pin V
CC(AADC)
(pin 77) is the 5 V supply voltage for the audio ADCs. The supply current for this pin is about 23 mA.
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