ADuM321x是采用ADI公司iCoupler® 技术的双通道数字隔离器。这款隔离器件将高速CMOS与单芯片变压器技术融为一体,具有优于光耦合器等替代器件的出色性能特征。
iCoupler器件不用LED和光电二极管,因而不存在一般与光耦合器相关的设计困难。简单的iCoupler数字接口和稳定的性能特征,可消除光耦合器通常具有的电流传输比不确定、非线性传递函数以及温度和使用寿命影响等问题。这些iCoupler产品不需要外部驱动器和其它分立器件。此外,在信号数据速率相当的情况下,iCoupler器件的功耗只有光耦合器的1/10至1/6。
ADuM321x的双通道属于独立式隔离通道,提供两种配置选择、两种不同数据速率,最高可达10 Mbps(见订购指南)。它们均可采用2.7 V至5.5 V电源电压工作,与低压系统兼容,并且能够跨越隔离栅实现电压转换功能。相比ADuM3200/ ADuM3201的默认输出高电平特性,ADuM321x隔离器具有默认输出低电平特性。该系列器件还提供125°C温度等级。
与ADuM120x隔离器相比,ADuM321x隔离器包含多项电路和布局改进,系统级IEC 61000-4-x测试(ESD、突波和浪涌)显示其性能大大增强。对于ADuM120x或ADuM321x产品,这些测试的精度主要取决于用户电路板或模块的设计与布局。更多信息,请参考应用笔记AN-793:“iCoupler隔离产品的ESD/闩锁考虑因素。”
应用
尺寸至关重要的多通道隔离
SPI接口/数据转换器隔离
RS-232/RS-422/RS-485收发器隔离
数字现场总线隔离
栅极驱动接口
特点和优势
汽车应用版本已通过AEC-Q100认证
增强的系统级ESD保护性能,符合IEC 61000-4-x标准
工作温度最高可达125°C
默认低电平输出
8引脚窄体SOIC封装,符合RoHS标准
低功耗运行-见数据手册
3 V/5 V电平转换
高数据速率:dc至10 Mbps (NRZ)
欲了解更多信息,请参考数据手册
FEATURES
Enhanced system-level ESD performance per IEC 61000-4-x
High temperature operation: 125°C
Default low output
Narrow body, RoHS-compliant, 8-lead SOIC
Low power operation
5 V operation
1.7 mA per channel maximum at 0 Mbps to 2 Mbps
3.7 mA per channel maximum at 10 Mbps
7.0 mA per channel maximum at 25 Mbps
3 V operation
1.5 mA per channel maximum at 0 Mbps to 2 Mbps
2.5 mA per channel maximum at 10 Mbps
4.7 mA per channel maximum at 25 Mbps
3 V/5 V level translation
High data rate: dc to 25 Mbps (NRZ)
Precise timing characteristics
3 ns maximum pulse width distortion at 5 V operation
3 ns maximum channel-to-channel matching
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals
UL recognition: 2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 560 V peak
Qualified for automotive applications
APPLICATIONS
Size-critical multichannel isolation
SPI interface/data converter isolation
RS-232/RS-422/RS-485 transceiver isolation
Digital field bus isolation
Gate drive interfaces
Hybrid electric vehicles, battery monitor, and motor drive
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