ADuM140x* 是采用ADI公司iCoupler® 技術(shù)的四通道數(shù)字隔離器。這些隔離器件將高速CMOS與單芯片空芯變壓器技術(shù)融為一體,具有優(yōu)于光耦合器等替代器件的出色性能特征。
iCoupler 器件不用LED和光電二極管,因而不存在一般與光耦合器相關(guān)的設(shè)計困難。簡單的iCoupler 數(shù)字接口和穩(wěn)定的性能特征,可消除光耦合器通常具有的電流傳輸比不確定、非線性傳遞函數(shù)以及溫度和使用壽命影響等問題。
這些 iCoupler 產(chǎn)品不需要外部驅(qū)動器和其它分立器件。此外,在信號數(shù)據(jù)速率相當(dāng)?shù)那闆r下,iCoupler 器件的功耗只有光耦合器的1/10至1/6。
ADuM140x隔離器提供四個獨立的隔離通道,支持多種通道配置和數(shù)據(jù)速率(請參考數(shù)據(jù)手冊“訂購指南”部分)。所有型號任一端均可采用2.7 V至5.5 V電源電壓工作,與低壓系統(tǒng)兼容,并且支持跨越隔離柵的電壓轉(zhuǎn)換功能。此外,ADuM140x具有低脈沖寬度失真(CRW級小于2 ns)和嚴(yán)格的通道間匹配(CRW級小于2 ns)特性。與其它光耦合器不同,ADuM140x隔離器具有已取得專利的刷新特性,可確保不存在輸入邏輯轉(zhuǎn)換時及缺少一個電源條件下的直流正確性。
應(yīng)用
--通用多通道隔離
--SPI接口/數(shù)據(jù)轉(zhuǎn)換器隔離
--RS-232/RS-422/RS-485 收發(fā)器
--工業(yè)現(xiàn)場總線隔離
--汽車系統(tǒng)
*受美國專利第5,952,849號、6,873,065號、6,903,578號和7,075,329號保護(hù),其它專利正在申請中。
特點和優(yōu)勢
汽車應(yīng)用版本已通過AEC-Q100認(rèn)證
低功耗工作
雙向通信
3 V/5 V 電平轉(zhuǎn)換
工作溫度最高可達(dá)125°C
高數(shù)據(jù)速率:DC至90 Mbps (NRZ)
精密定時特性
高共模瞬變抗擾度:>25 kV/µs
欲了解更多特性,請參考數(shù)據(jù)手冊
FEATURES
Qualified for automotive applications
Low power operation
5 V operation
1.0 mA per channel maximum @ 0 Mbps to 2 Mbps
3.5 mA per channel maximum @ 10 Mbps
31 mA per channel maximum @ 90 Mbps
3 V operation
0.7 mA per channel maximum @ 0 Mbps to 2 Mbps
2.1 mA per channel maximum @ 10 Mbps
20 mA per channel maximum @ 90 Mbps
Bidirectional communication
3 V/5 V level translation
High temperature operation: 125°C
High data rate: dc to 90 Mbps (NRZ)
Precise timing characteristics
2 ns maximum pulse width distortion
2 ns maximum channel-to-channel matching
High common-mode transient immunity: >25 kV/μs
Output enable function
16-lead SOIC wide body package
RoHS-compliant models available
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
TÜV approval: IEC/EN/UL/CSA 61010-1
APPLICATIONS
General-purpose multichannel isolation
SPI interface/data converter isolation
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
Automotive systems
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