ADI公司的AD7403是高性能二阶Delta-Sigma调制器,能把模拟输入信号转换成高速单比特数据流,外时钟频率5-20MHz,16位不丢失码,SNR 88dB,温度漂移1.6 μV/℃, 满刻度输入范围±320 mV,工作温度−40℃ 到 + 125℃,主要用在马达控制,电源和太阳能逆变器,数据收罗系统,风能逆变器,并联电流监督器等.本文先容了AD7403主要特点,框架图, 评估板EVAL-AD7403FMCZ主要特点,框架图,电路图,质料清单和PCB元件结构图. The AD7403 is a high performance, second-order, Σ-Δ modulator that converts an analog input signal into a high speed, single-bit data stream, with on-chip digital isolation based on Analog Devices, Inc., iCoupler® technology. The AD7403 operates from a 5 V (VDD1) power supply and accepts a differential input signal of ±250 mV (±320 mV full-scale). The differential input is ideally suited to shunt voltage monitoring in high voltage applications where galvanic isolation is required. The analog input is continuously sampled by a high performance analog modulator, and converted to a ones density digital output stream with a data rate of up to 20 MHz. The original information can be reconstructed with an appropriate digital filter to achieve 88 dB signal to noise ratio (SNR) at 78.1 kSPS. The serial input/output can use a 5 V or a 3 V supply (VDD2). The serial interface is digitally isolated. High speed complementary metal oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices. The AD7403 device is offered in a 16-lead, wide-body SOIC package and has an operating temperature range of −40℃ to +125℃. AD7403主要特点: 5 MHz to 20 MHz external clock input rate AD7403应用: Shunt current monitoring 评估板EVAL-AD7403FMCZ The EVAL-AD7403FMCZ is a full featured evaluation board designed to allow the user to easily evaluate all features of the AD7403 isolated analog-to-digital converter (ADC). The evaluation board can be controlled by the EVAL-SDP-CH1Z via FMCZ connector (J9). The SDP-H1 board (EVAL-SDP-CH1Z) allows the evaluation board to be controlled through a USB port of a PC using the evaluation board software available for download from the product page or from the included installer CD. On-board components include the following: 评估板EVAL-AD7403FMCZ主要特点: 评估板EVAL-AD7403FMCZ包罗: 详情请复制打开此衔接地址: AD7403.pdf |