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參數(shù)資料
| 型號(hào)： | EVAL-ADAU1401EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/52頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR ADAU1401 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | SigmaDSP® |
| 主要目的： | 音頻編解碼器 |
| 嵌入式： | 是，DSP |
| 已用 IC / 零件： | ADAU1401 |
| 主要屬性： | 在 50-MIPS 時(shí)的 28/56 位音頻處理器，2 ADC，4 DAC |
| 次要屬性： | 均衡，交叉，低音增強(qiáng)，多頻帶動(dòng)態(tài)處理，延遲等 |
| 已供物品： | 2 個(gè)板，線纜，電源 |
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ADAU1401
Data Sheet
Rev. C | Page 20 of 52
VOLTAGE REGULATOR
Two specifications must be considered when choosing a regu-
lator transistor: The transistor’s current amplification factor
(hFE or beta) should be at least 100, and the transistor’s collector
must be able to dissipate the heat generated when regulating
from 3.3 V to 1.8 V. The maximum digital current drawn from
the ADAU1401 is 60 mA. The equation to determine the
minimum power dissipation of the transistor is as follows:
The digital voltage of the ADAU1401 must be set to 1.8 V. The
chip includes an on-board voltage regulator that allows the
device to be used in systems without an available 1.8 V supply
but with an available 3.3 V supply. The only external components
needed in such instances are a PNP transistor, a resistor, and a
few bypass capacitors. Only one pin, VDRIVE, is necessary to
support the regulator.
(3.3 V 1.8 V) × 60 mA = 90 mW
There are many transistors, such as the FZT953 from Zetex
Semiconductors, with these specifications available in small
SOT-23 or SOT-223 packages.
The recommended design for the voltage regulator is shown
in Figure 16. The 10 μF and 100 nF capacitors shown in this
configuration are recommended for bypassing, but are not
necessary for operation. Each DVDD pin should have its own
100 nF bypass capacitor, but only one bulk capacitor (10 μF to
47 μF) is needed for both DVDD pins. With this configuration,
3.3 V is the main system voltage; 1.8 V is generated at the
transistor’s collector, which is connected to the DVDD pins.
VDRIVE is connected to the base of the PNP transistor. If the
regulator is not used in the design, VDRIVE can be tied to ground.
3.3V
1k
VDRIVE
DVDD
10F
100nF
ADAU1401
06
75
2-
01
6
+
Figure 16. Voltage Regulator Configuration
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-ADAU1401-EBZ | 制造商:Analog Devices 功能描述:EVALUATION KIT ((NS)) |
| EVAL-ADAU1442EBZ | 功能描述:BOARD EVAL FOR ADAU1442 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:SigmaDSP® 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| EVAL-ADAU1446EBZ | 功能描述:BOARD EVAL FOR ADAU1446 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:SigmaDSP® 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| EVAL-ADAU1590EBZ | 制造商:Analog Devices 功能描述:EVAL BOARD - Bulk |
| EVAL-ADAU1592EBZ | 制造商:Analog Devices 功能描述:Evaluation Board For ADAU1592 制造商:Analog Devices 功能描述:EVAL BOARD - Boxed Product (Development Kits) |
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