参数资料
型号: ADAU1701JSTZ
厂商: Analog Devices Inc
文件页数: 13/53页
文件大小: 0K
描述: IC AUDIO PROC 2ADC/4DAC 48-LQFP
设计资源: Analog Audio Input, Class-D Output with ADAU1701, SSM2306, and ADP3336 (CN0162)
标准包装: 1
系列: SigmaDSP®
类型: 音频处理器
应用: 车载,监视器,MP3
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 托盘
产品目录页面: 776 (CN2011-ZH PDF)
配用: EVAL-ADAU1701MINIZ-ND - BOARD EVAL SIGMADSP AUD ADAU1701
ADAU1701
Rev. B | Page 19 of 52
VOLTAGE REGULATOR
Two specifications must be considered when choosing a regulator
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
ADAU1701 is 60 mA. The equation to determine the minimum
power dissipation of the transistor is as follows:
The digital voltage of the ADAU1701 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
ADAU1701
+
06
41
2-
01
6
Figure 16. Voltage Regulator Configuration
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ADAU1701JSTZ-RL 功能描述:IC AUDIO PROC 2ADC/4DAC 48-LQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:SigmaDSP® 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP(10x10) 包装:Digi-Reel® 其它名称:497-11050-6
ADAU1701MINIBZ 制造商:Analog Devices 功能描述:EVAL BD SIGMADSPMULTICHANAUDIO PROCESSOR - Bulk
ADAU1702 制造商:AD 制造商全称:Analog Devices 功能描述:SigmaDSP 28-56-Bit Audio Processor with Two ADCs and Four DACs
ADAU1702JSTZ 功能描述:IC AUDIO PROC 2ADC/4DAC 48-LQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:SigmaDSP® 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP(10x10) 包装:Digi-Reel® 其它名称:497-11050-6
ADAU1702JSTZ-RL 功能描述:IC AUDIO PROC 2ADC/4DAC 48-LQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:SigmaDSP® 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP(10x10) 包装:Digi-Reel® 其它名称:497-11050-6