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Si8410/20/21
2. Functional Description
2.1. Theory of Operation
The operation of an Si84xx channel is analogous to that of an opto coupler, except an RF carrier is modulated
instead of light. This simple architecture provides a robust isolated data path and requires no special
considerations or initialization at start-up. A simplified block diagram for a single Si84xx channel is shown in
Figure 3.
Transmitter
RF
OSCILLATOR
Semiconductor-
Receiver
A
MODULATOR
Based Isolation
Barrier
DEMODULATOR
B
Figure 3. Simplified Channel Diagram
A channel consists of an RF Transmitter and RF Receiver separated by a semiconductor-based isolation barrier.
Referring to the Transmitter, input A modulates the carrier provided by an RF oscillator using on/off keying. The
Receiver contains a demodulator that decodes the input state according to its RF energy content and applies the
result to output B via the output driver. This RF on/off keying scheme is superior to pulse code schemes as it
provides best-in-class noise immunity, low power consumption, and better immunity to magnetic fields. See
Figure 4 for more details.
Input Signal
Modulation Signal
Output Signal
Figure 4. Modulation Scheme
Rev. 1.5
17
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Si8501-C-GM 功能描述:板上安装电流传感器 5A Current Sensor Single Output RoHS:否 制造商:Honeywell 电流额定值:+/- 56 A 传感器/变换器类型: 电源电压:4.75 VDC to 5.25 VDC 响应时间:< 0.2 us 输出电压: 工作温度:- 40 C to + 85 C 准确性:+/- 0.24 % 频率范围:
SI8501-C-GMR 制造商:Silicon Laboratories Inc 功能描述:5A CURRENT SENSOR, SINGLE OUTPUT - Tape and Reel
Si8501-C-IM 功能描述:板上安装电流传感器 5A SINGLE OUTPUT 1kV RoHS:否 制造商:Honeywell 电流额定值:+/- 56 A 传感器/变换器类型: 电源电压:4.75 VDC to 5.25 VDC 响应时间:< 0.2 us 输出电压: 工作温度:- 40 C to + 85 C 准确性:+/- 0.24 % 频率范围:
SI8501-C-IMR 制造商:Silicon Laboratories Inc 功能描述:5A CURRENT SENSOR, SINGLE OUTPUT 1KV QFN12 - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:SENSOR CURRENT 5A 5.5V UNI 12QFN 制造商:Silicon Laboratories Inc 功能描述:5A Current Sensor Single Output 1kV
Si8501-C-IS 功能描述:板上安装电流传感器 5A SINGLE OUTPUT 5kV RoHS:否 制造商:Honeywell 电流额定值:+/- 56 A 传感器/变换器类型: 电源电压:4.75 VDC to 5.25 VDC 响应时间:< 0.2 us 输出电压: 工作温度:- 40 C to + 85 C 准确性:+/- 0.24 % 频率范围: