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高精度AD转换器LTC1606及其应用 总被引:7,自引:0,他引:7
介绍了一种高精度单通道16位并行输出A/D转换器LTC1606的功能特点和工作过程 ,给出了LTC1606与DSP芯片TMS320LF2407A的硬件接口方法以及和数据采集相关的主要汇编源程序 相似文献
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《电子技术》2005,32(12):16-16
凌特公司推出14位105M sps双路高速A D C LTC2284,在70M H z可提供平坦的72.2dBSN R响应以及在基带的88dBSFD R。LTC2284是以低功耗、小解决方案尺寸和卓越的串扰规范而得到公认的引脚兼容双路A D C系列的最新产品。配合LTC2284还有10位LTC2280和12位LTC2282105M sps双路A D C。这3种双路A D C宽带宽采样率为105M sps,扩充了已有的10M sps至105M sps10位、12位和14位3V系列器件。3种A D C的功耗是每通道仅270m W,通道间串扰为-110dB。LTC2284提供在两个输入范围之间进行选择的灵活性。这个A D C系列为高达140M H z信… 相似文献
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《电子元器件应用》2008,10(2):I0007-I0007
Linear Technology Corporation日前推出一系列引脚和软件都兼容的16位和12位SAR ADC,这个系列的器件保证在-40℃至+125℃的汽车温度范围内工作。16位LTC1864/LTC1865和12位LTC1860/LTC1861都用单5V电源工作,每个器件仅消耗850μA电流,并保证输出率高达250ksps。LTC1864和LTC1860是引脚和软件兼容的ADC,在纤巧MSOP-8封装测量单个差分通道。LTC1865和LTC1861是引脚和软件兼容的ADC,采用MSOP-10封装测量两个单端通道。 相似文献
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目前,国内采用的多路D/A转换器,各路间大都是相互独立的。如图1所示,每路都有一片D/A转换芯片和一个电流-电压变换器(I/V变换器)。微处理器CPU只需向相应的口地址送入需要转换的数字量,D/A转换就可以进行。由于输入端数字锁存器的锁存功能,模拟输出电压可以一直保持下去,直到送入下一个不同的数字量。这种转换器的优点是各通道间互相独立互不影响,通道间无干扰,转换精度高,占用CPU时间少,在实时过程软件中编程 相似文献
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LTC2400是凌特公司(Linear)生产的一种微功耗、高精度24位A/D转换器 ,该芯片内部集成有振荡器 ,工作电压为2.7~5.5V ,积分线性误差 (INL)为4ppm ,RMS噪声为0.3ppm ,供电电流仅为200μA(待机时为20μA) ,采用Δ -Σ技术及独特的体系结构 ,建立时间为单周期。文中介绍了LTC2400的主要功能和串行接口方法,给出了LTC2400与单片机的接口电路。 相似文献
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LTC6910-1、LTC6910-2和LTC6910-3是占用PCB空间非常小的低噪声数字控制可编程增益放大器.它们可通过3位数字输入来提供8种电压增益以供选择.文中简要介绍LTC6910的主要特性、内部结构、引脚功能和工作原理,给出LTC6910的实际应用电路. 相似文献
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介绍了Linear公司的双路电流输出的数模(D/A)转换器LTC2753的主要特性、电路结构及应用电路.并在此基础上设计了偏移量和增益调整电路. 相似文献
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A power amplifier for a loudspeaker and the earpiece of a telephone subset, integrated in the codec chip ARCOFI-SP (audio ringing codec filter featuring speakerphone function), are presented. The ARCOFI-SP is part of a subscriber telephone chip set. The analog section of the receive path comprises a low-noise programmable gain microphone amplifier with a maximum gain of 30-dB followed by a 16-b second-order sigma-delta analog-to-digital (A/D) converter. The analog section of the transmit path consists of two 16-b second-order sigma-delta D/A converters, one driving a pair of handset amplifiers for 200- Omega differential load and the other one a pair of loudspeaker amplifiers for 50- Omega differential load. The loudspeaker amplifier is described. A digital signal processor calculates the filter functions and handles frequency and tone generation. The amplifier has 1.2-mA quiescent current, 64-mA peak current, and >60 dB S/THD with 3.2-V output swing into a 25- Omega load.<> 相似文献
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首先介绍了四开关Buck-Boost控制器LTC3780的基本功能及原理,并以LTC3780为基础设计了一款24~26 V/300 W直流开关电源,然后利用LINEAR公司提供的电路仿真软件LTspiceIV对其进行仿真,在此基础上完成了PCB设计,并给出了一些PCB布局的建议。 相似文献
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《Solid-State Circuits, IEEE Journal of》1987,22(3):390-395
A complete monolithic stereo 16-bit D/A converter primarily intended for use in compact-disc players and digital audio tape recorders is described. The D/A converter achieves 16-bit resolution by using a code-conversion technique based upon oversampling and noise shaping. The band-limiting filters required for waveform smoothing and out-of-band noise reduction are included. Owing to the oversampling principle most applications will require only a few components for an analog postfilter. The converter has a linear characteristic and linear phase response. The chip is processed in a 2-/spl mu/m CMOS process and the die size is 44 mm/SUP 2/. Only a single 5-V supply is needed. 相似文献
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提出了一种基于TMS320VC549定点DSP微处理器芯片的语音信号压缩/解压缩处理系统。该系统采用TLC320AD50C模数、数模转换器,采样率为8kHz,处理能力为100MIPS。系统配置有大容量存储器,具备资源扩展能力,适用于语音信号压缩/解压缩和语音识别、语音合成等其他领域。实验结果表明。系统对语音信号的压缩解压缩处理具有稳定性、灵活性和通用性。 相似文献
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Hao Lu Guangliu Ran Yuqiang Liu Zengliang Pei Wenxu Liu Yahui Liu Zheng Tang Wenkai Zhang Zhishan Bo 《Advanced functional materials》2023,33(40):2301866
Nowadays, it is still a great challenge to obtain high-performance green-solvent-processed organic solar cells (OSCs). In this study, a ternary blend strategy (one donor and two acceptors, 1D/2A) is developed to solve the difficulty of film morphology modulation during the fabrication of high-performance green-solvent-processed OSCs. A typical high-performance halogenated-solvent processable binary system D18:BTP-eC9-4F is selected as the host, its green-solvents-processed devices show an inferior power conversion efficiency (PCE) of ≈16%. SM16 with two 3D shape persistent end groups is selected as the third component due to its high fluorescence quantum yield, reduced intermolecular interaction, good solubility, and moderate crystallinity. As a result, the ternary devices display bicontinuous interpenetrating networks, reduced energy loss, and suppressed charge carrier recombination losses. Hence, an excellent PCE of 18.20% is achieved for the D18:BTP-eC9-4F:SM16 ternary devices, which is much higher than D18:BTP-eC9-4F-based binary ones and also one of the highest PCEs for the green-solvents-processed OSCs. Besides, this strategy also demonstrates a good universality for other binary systems and becomes an effective pathway for the development of green-solvent processable high-performance OSCs. 相似文献