The AD7405 is a high-performance, second-order sigma-delta modulator with on-chip digital isolation using Analog Devices' iCoupler® technology to convert analog input signals into high-speed, single-bit LVDS data streams. The AD7405 operates from a 5 V (VDD1) supply and can input a differential signal ± 250 mV (full-scale±320 mV). This differential input signal is ideal for monitoring shunt voltages in high-voltage applications requiring galvanic isolation.
The analog input is continuously sampled by a high-performance analog modulator and converted into a digital output stream with a data rate of up to 20 MHz and a density of 1. The raw information can be reconstructed with appropriate digital filters to achieve a signal-to-noise ratio (SNR) of 88 dB at 78.1 kSPS. LVDS inputs/outputs can be operated from either a 5 V or 3.3 V supply (VDD2).
The LVDS interface is digitally isolated. By combining LVDS interface technology with monolithic transformer technology, on-chip isolation provides better operating characteristics than other components such as traditional optocouplers. The AD7405 is available in a 16-pin, wide-body SOIC package with an operating temperature range of −40°C to +125°C.
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分路电流监控
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交流电机控制
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功率和太阳能逆变器
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风轮机逆变器
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数据采集系统
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模数及光隔离器的方案替代
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