参数资料
型号: SI8421BD-B-IS
厂商: Silicon Laboratories Inc
文件页数: 20/37页
文件大小: 0K
描述: ISOLATOR 2CH 5KV 150M 16SOIC
视频文件: Digital Isolation Overview
Digital Isolators vs. Optocouplers
标准包装: 46
系列: ISOpro
输入 - 1 侧/2 侧: 1/1
通道数: 2
电源电压: 2.7 V ~ 5.5 V
电压 - 隔离: 5000Vrms
数据速率: 150Mbps
传输延迟: 8ns
输出类型: 逻辑
封装/外壳: 16-SOIC(0.295",7.50mm 宽)
供应商设备封装: 16-SOIC W
包装: 管件
工作温度: -40°C ~ 125°C
产品目录页面: 628 (CN2011-ZH PDF)
其它名称: 336-1936-5
SI8421BD-B-IS-ND
Si8410/20/21 (5 kV)
Si8 422/23 ( 2. 5 & 5 k V)
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 4.
Transmitter
RF
OSCILLATOR
Semiconductor-
Receiver
A
MODULATOR
Based Isolation
Barrier
DEMODULATOR
B
Figure 4. 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 5 for more details.
Input Signal
Modulation Signal
Output Signal
Figure 5. Modulation Scheme
20
Rev. 1.3
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