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Image ADUM1201
型号: ADUM1201
厂商: Analog Devices Inc Analog Devices Inc
分类: 半导体
描述: dual-channel digital isolators
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Dual-Channel Digital Isolators  
ADuM1200/ADuM1201  
GENERAL DESCRIPTION  
FEATURES  
Narrow body SOIC 8-lead package  
Low power operation  
5 V operation  
The ADuM120x are dual-channel digital isolators based on  
Analog Devices’ iCoupler? technology. Combining high speed  
CMOS and monolithic transformer technology, these isolation  
components provide outstanding performance characteristics  
superior to alternatives such as optocoupler devices.  
1.1 mA per channel maximum @ 0 Mbps to 2 Mbps  
3.7 mA per channel maximum @ 10 Mbps  
8.2 mA per channel maximum @ 25 Mbps  
3 V operation  
0.8 mA per channel maximum @ 0 Mbps to 2 Mbps  
2.2 mA per channel maximum @ 10 Mbps  
4.8 mA per channel maximum @ 25 Mbps  
Bidirectional communication  
By avoiding the use of LEDs and photodiodes, iCoupler devices  
remove the design difficulties commonly associated with  
optocouplers. The typical optocoupler concerns regarding  
uncertain current transfer ratios, nonlinear transfer functions,  
and temperature and lifetime effects are eliminated with the  
simple iCoupler digital interfaces and stable performance  
characteristics. The need for external drivers and other discrete  
components is eliminated with these iCoupler products.  
Furthermore, iCoupler devices consume one-tenth to one-sixth  
the power of optocouplers at comparable signal data rates.  
3 V/5 V level translation  
High temperature operation: 105°C  
High data rate: dc to 25 Mbps (NRZ)  
Precise timing characteristics  
3 ns maximum pulse-width distortion  
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 EN 60747-5-2 (VDE 0884 Part 2): 2003-01  
DIN EN 60950 (VDE 0805): 2001-12; DIN EN 60950: 2000  
VIORM = 560 V peak  
The ADuM120x isolators provide two independent isolation  
channels in a variety of channel configurations and data rates  
(see the Ordering Guide). Both parts operate with the supply  
voltage on either side ranging from 2.7 V to 5.5 V, providing  
compatibility with lower voltage systems as well as enabling a  
voltage translation functionality across the isolation barrier. In  
addition, the ADuM120x provide low pulse-width distortion  
(< 3 ns for CR grade) and tight channel-to-channel matching  
(< 3 ns for CR grade). Unlike other optocoupler alternatives, the  
ADuM120x isolators have a patented refresh feature that  
ensures dc correctness in the absence of input logic transitions  
and during power-up/power-down conditions.  
APPLICATIONS  
Size-critical multichannel isolation  
SPI? interface/data converter isolation  
RS-232/RS-422/RS-485 transceiver isolation  
Digital field bus isolation  
FUNCTIONAL BLOCK DIAGRAMS  
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
V
V
V
V
V
V
V
V
DD1  
DD2  
OA  
DD1  
DD2  
IA  
ENCODE  
ENCODE  
DECODE  
DECODE  
DECODE  
ENCODE  
ENCODE  
DECODE  
V
V
V
OA  
IA  
V
IB  
OB  
IB  
OB  
GND  
GND  
GND  
GND  
2
1
2
1
Figure 1. ADuM1200 Functional Block Diagram  
Figure 2. ADuM1201 Functional Block Diagram  
Rev. B  
Information furnished by Analog Devices is believed to be accurate and reliable.  
However, no responsibility is assumed by Analog Devices for its use, nor for any  
infringements of patents or other rights of third parties that may result from its use.  
Specifications subject to change without notice. No license is granted by implication  
or otherwise under any patent or patent rights of Analog Devices. Trademarks and  
registered trademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
? 2004 Analog Devices, Inc. All rights reserved.  
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