Si8440/41/42/45
2. Functional Description
2.1. Theory of Operation
The operation of an Si844x 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 Si844x channel is shown in
Figure 5.
Transmitter
RF
OSCILLATOR
Semiconductor-
Receiver
A
MODULATOR
Based Isolation
Barrier
DEMODULATOR
B
Figure 5. 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 6 for more details.
Input Signal
Modulation Signal
Output Signal
Figure 6. Modulation Scheme
18
Rev. 1.6
相关PDF资料
SI8451BB-A-IS1 IC ISOLATOR DGTL 5CH 16SOIC
SI8460BB-A-IS1 IC ISOLATOR DGTL 6CH 16SOIC
SI8606AC-B-IS1 IC ISOLATOR BIDIR 3.75KV 16SOIC
SI8621ED-B-IS IC ISOLATOR 2CH 5KV 16-SOIC
SI8631EC-B-IS1 IC ISOLATOR 3CH 3.75KV 16-SOIC
SI8641ED-B-IS IC ISOLATOR 4CH 5.0KV 16-SOIC
SI8652BD-B-IS IC ISOLATOR 5CH 5.0KV 16-SOIC
SI8662EC-B-IS1 IC ISOLATOR 6CH 3.75KV 16-SOIC
相关代理商/技术参数
Si8442BB-C-IS1R 功能描述:隔离器接口集成电路 QuadCh 2.5kV Isolatr 150M 2/2 RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
SI8442BB-C-ISR 制造商:Silicon Laboratories Inc 功能描述:QUAD CH 2.5KV ISOLATOR, 150M, 2/2, SOIC16, LEAD FREE - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:Quad Ch 2.5kV Isolator 150M 2/2
Si8442BB-D-IS 功能描述:隔离器接口集成电路 Quad Ch 2.5kV Isolator 150M 2/2 RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
Si8442BB-D-IS1 功能描述:隔离器接口集成电路 QuadCh 2.5kV Isolatr 150M 2/2 RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
SI8442BB-D-IS1R 功能描述:隔离器接口集成电路 QuadCh 2.5kV Isolatr 150M 2/2 RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
SI8442BB-D-ISR 制造商:Silicon Laboratories Inc 功能描述:QUAD CH 2.5KV ISOLATOR, 150M, 制造商:Silicon Laboratories Inc 功能描述:QUAD CH 2.5KV ISOLATOR, 150M, 2/2, SOIC16, LEAD FREE - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC ISOLATOR 4CH 5.5V 16-SOIC 制造商:Silicon Laboratories Inc 功能描述:Quad Ch 2.5kV Isolator 150M
SI8442-B-IS 功能描述:隔离器接口集成电路 QUAD CH 2.5K V ISOLATOR 10M 2/2 RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
SI8442-C-IS 功能描述:IC ISOLATOR 4CH 2.5KV 150M16SOIC RoHS:是 类别:隔离器 >> 数字隔离器 系列:ISOpro 产品培训模块:IsoLoop® Isolator 标准包装:50 系列:IsoLoop® 输入 - 1 侧/2 侧:5/0 通道数:5 电源电压:3 V ~ 5.5 V 电压 - 隔离:2500Vrms 数据速率:110Mbps 传输延迟:12ns 输出类型:CMOS 封装/外壳:16-SOIC(0.154",3.90mm 宽) 供应商设备封装:16-SOIC N 包装:管件 工作温度:-40°C ~ 85°C 其它名称:390-1053-5