參數資料
型號: ADAU1701JSTZ-RL
廠商: ANALOG DEVICES INC
元件分類: 消費家電
英文描述: SigmaDSP 28/56-Bit Audio Processor with 2ADC/4DAC
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝: ROHS COMPLIANT, PLASTIC, MS-026BBC, LQFP-48
文件頁數: 16/43頁
文件大?。?/td> 625K
代理商: ADAU1701JSTZ-RL
ADAU1701
Preliminary Technical Data
Rev. PrF | Page 16 of 43
3.3V
1 k
Ω
VDRIVE
DVDD
ADAU1701
10 uF
100 nF
Figure 18. Voltage Regulator Design
Two specifications need to be taken into consideration when
choosing a regulator transistor. First, the transistor’s current
amplification factor (h
FE
or beta) should be at least 100. Second,
the transistor’s collector needs to be able to dissipate the heat
generated when regulating from 3.3 V to 1.8 V. The maximum
digital current draw of the ADAU1701 is 60 mA. The equation
to determine the transistor’s minimum power dissipation specs
is as follows:
(3.3 V – 1.8 V) × 60 mA = 90 mW
There are many transistors with these specifications available in
small packages (i.e. SOT-23 or SOT-223), such as the 2N3906 or
FZT953.
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