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參數(shù)資料
| 型號： | ADAV400KSTZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費家電 |
| 英文描述： | Audio Codec with Embedded SigmaDSP Processor |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO80 |
| 封裝： | 14 X 14 MM, ROHS COMPLIANT, MS-026BEC, LQFP-80 |
| 文件頁數(shù)： | 14/36頁 |
| 文件大?。?/td> | 446K |
| 代理商： | ADAV400KSTZ |
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ADAV400
HEADPHONE AMPLIFIER
The ADAV400 has an integrated stereo headphone amplifier
capable of driving 32 mW into a 32 Ω load.
Rev. 0 | Page 14 of 36
VOLTAGE REGULATOR
The ADAV400 includes an on-chip voltage regulator that
enables the chip to be used in systems where a 1.8 V supply is
not available. The only external components needed are a PNP
transistor (such as FZT953), a single capacitor, and a single
resistor. The recommended design for the voltage regulator is
shown in Figure 19.
Here, VDD is the main system voltage (3.3 V). A voltage of 1.8 V
is generated at the transistor’s collector and is connected to the
DVDD pins. VDRIVE is an output from the internal regulator
circuit on the ADAV400 and is connected to the base of the
PNP transistor
ADAV400
+
D
+
D
V
O
+
VDD
0
Figure 19. Voltage Regulator Design
There are two specifications to take into consideration when
choosing the regulator’s transistor. First, h
FE
should be at least 100.
Second, the collector power dissipation, P
C
, must be greater than
P
C
= (3.3 V 1.8 V) × 135 mA = 202.5 mW
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相關代理商/技術參數(shù) |
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| ADAV400KSTZ-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Audio Codec with Embedded SigmaDSP Processor |
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