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| 型号： | SI8401AB-B-ISR |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 14/34页 |
| 文件大小： | 0K |
| 描述： | ISOL DGTL 2.5KVRMS 2CH 8SOIC |
| 视频文件： | Digital Isolation Overview Digital Isolators vs. Optocouplers |
| 标准包装： | 2,500 |
| 输入 - 1 侧/2 侧： | 2/1 |
| 通道数： | 2 |
| 电源电压： | 3 V ~ 5.5 V |
| 电压 - 隔离： | 2500Vrms |
| 数据速率： | 10Mbps |
| 输出类型： | 开路漏极 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
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Si840x
3.3. Layout Recommendations
To ensure safety in the end user application, high voltage circuits (i.e., circuits with >30 V AC ) must be physically
separated from the safety extra-low voltage circuits (SELV is a circuit with <30 V AC ) by a certain distance
(creepage/clearance). If a component, such as a digital isolator, straddles this isolation barrier, it must meet those
creepage/clearance requirements and also provide a sufficiently large high-voltage breakdown protection rating
(commonly referred to as working voltage protection). Table 6 on page 9 and Table 7 on page 9 detail the working
voltage and creepage/clearance capabilities of the Si84xx. These tables also detail the component standards
(UL1577, IEC60747, CSA 5A), which are readily accepted by certification bodies to provide proof for end-system
specifications requirements. Refer to the end-system specification (61010-1, 60950-1, etc.) requirements before
starting any design that uses a digital isolator.
The following sections detail the recommended bypass and decoupling components necessary to ensure robust
overall performance and reliability for systems using the Si84xx digital isolators.
3.3.1. Supply Bypass
Digital integrated circuit components typically require 0.1 μF (100 nF) bypass capacitors when used in electrically
quiet environments. However, digital isolators are commonly used in hazardous environments with excessively
noisy power supplies. To counteract these harsh conditions, it is recommended that an additional 1 μF bypass
capacitor be added between VDD and GND on both sides of the package. The capacitors should be placed as
close as possible to the package to minimize stray inductance. If the system is excessively noisy, it is
recommended that the designer add 50 to 100 ? resistors in series with the VDD supply voltage source and 50 to
300 ? resistors in series with the digital inputs/outputs (see Figure 8). For more details, see "5.Errata and Design
Migration Guidelines" on page 22.
All components upstream or downstream of the isolator should be properly decoupled as well. If these components
are not properly decoupled, their supply noise can couple to the isolator inputs and outputs, potentially causing
damage if spikes exceed the maximum ratings of the isolator (6 V). In this case, the 50 to 300 ? resistors protect
the isolator's inputs/outputs (note that permanent device damage may occur if the absolute maximum ratings are
exceeded). Functional operation should be restricted to the conditions specified in Table 3, “Si8400/01/02/05
Electrical Characteristics for Bidirectional I2C Channels 1 ,” on page 5. and Table 4, “Electrical Characteristics for
Unidirectional Non-I2C Digital Channels (Si8402/05),” on page 7
3.3.2. Pin Connections
No connect pins are not internally connected. They can be left floating, tied to V DD , or tied to GND.
3.3.3. Output Pin Termination
The nominal output impedance of an non-I 2 C isolator driver channel is approximately 85 ? , ±40%, which is a
combination of the value of the on-chip series termination resistor and channel resistance of the output driver FET.
When driving loads where transmission line effects will be a factor, output pins should be appropriately terminated
with controlled impedance PCB traces. The series termination resistor values should be scaled appropriately while
keeping in mind the recommendations described in “3.3.1. Supply Bypass” above.
V Source 1
R1 (50 – 100 ? )
V Source 2
R2 (50 – 100 ? )
C1
0.1 ? F
50 – 300 ?
AVDD
Ax
BVDD
Bx
50 – 300 ?
C4
0.1 ? F
C2
C3
1 ? F
Input/Output
50 – 300 ?
Ax
AGND
Bx
BGND
Input/Output
50 – 300 ?
1 ? F
Figure 8. Recommended Bypass Components for the Si84xx Digital Isolator Family
14
Rev. 1.6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SI8401DB | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:P-Channel 20-V (D-S) MOSFET |
| SI8401DB-T1 | 功能描述:MOSFET 20V 4.9A 1.47W RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| SI8401DB-T1-E1 | 功能描述:MOSFET 20V 4.9A 2.77W 65mohm @ 4.5V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| SI8401DB-T1-E3 | 功能描述:MOSFET 20V 4.9A 2.77W 65mohm @ 4.5V RoHS:否 制造商:STMicroelectronics 晶体管极性:N-Channel 汲极/源极击穿电压:650 V 闸/源击穿电压:25 V 漏极连续电流:130 A 电阻汲极/源极 RDS（导通）:0.014 Ohms 配置:Single 最大工作温度: 安装风格:Through Hole 封装 / 箱体:Max247 封装:Tube |
| SI8401DB-T1-E3 | 制造商:Vishay Siliconix 功能描述:MOSFET |
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