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ADUM7440CRQZ

更新时间： 2024-11-27 06:36:27
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20页 425K
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1 kV RMS Quad-Channel Digital Isolators

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ADUM7440CRQZ 数据手册

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1 kV RMS Quad-Channel Digital Isolators  
ADuM7440/ADuM7441/ADuM7442  
FEATURES  
GENERAL DESCRIPTION  
Small, 16-lead QSOP  
The ADuM744x1 are 4-channel digital isolators based on the  
Analog Devices, Inc., iCoupler® technology. Combining high  
speed CMOS and monolithic air core transformer technologies,  
these isolation components provide outstanding performance  
characteristics superior to the alternatives, such as optocoupler  
devices and other integrated couplers.  
1000 V rms isolation rating  
Safety and regulatory approvals (pending)  
UL recognition  
UL 1577: 1000 V rms for 1 minute  
CSA Component Acceptance Notice #5A  
Low power operation  
The ADuM744x family of quad 1 kV digital isolation devices  
is packaged in a small 16-lead QSOP. While most 4-channel  
5 V operation  
2.25 mA per channel maximum @ 0 Mbps to 1 Mbps  
11.5 mA per channel maximum @ 25 Mbps  
3.3 V operation  
1.5 mA per channel maximum @ 0 Mbps to 1 Mbps  
8.25 mA per channel maximum @ 25 Mbps  
Bidirectional communication  
isolators come in 16-lead wide SOIC packages, the ADuM744x  
frees almost 70% of board space and yet can still withstand high  
isolation voltage and meet regulatory requirements such as UL  
and CSA standards (pending). In addition to the space savings,  
the ADuM744x offers a lower price than 2.5 kV or 5 kV  
isolators where only functional isolation is needed.  
Up to 25 Mbps data rate (NRZ)  
This family, like many Analog Devices isolators, offers very  
low power consumption, consuming one-tenth to one-sixth  
the power of comparable isolators at comparable data rates up  
to 25 Mbps. Despite the low power consumption, all models of  
the ADuM744x provide low pulse width distortion (< 5 ns for  
C grade). In addition, every model has an input glitch filter to  
protect against extraneous noise disturbances.  
3 V/5 V level translation  
High temperature operation: 105°C  
High common-mode transient immunity: >15 kV/μs  
APPLICATIONS  
General-purpose, multichannel isolation  
SPI interface/data converter isolation  
RS-232/RS-422/RS-485 transceivers  
Industrial field bus isolation  
The ADuM744x isolators provide four independent isolation  
channels in a variety of channel configurations and two data  
rates (see the Ordering Guide) up to 25 Mbps. All models  
operate with the supply voltage on either side ranging from  
3.0 V to 5.5 V, providing compatibility with lower voltage  
systems as well as enabling voltage translation functionality  
across the isolation barrier. All products also have an output  
default high logic state in the absence of the input power.  
1 Protected by U.S. Patents 5,952,849, 6,873,065 and 7,075,329. Other patents  
pending.  
FUNCTIONAL BLOCK DIAGRAMS  
1
2
3
16  
15  
14  
1
2
3
16  
15  
14  
1
2
3
16  
15  
14  
V
V
V
V
V
V
DD1A  
DD2A  
DD1A  
DD2A  
DD1A  
DD2A  
ADuM7441  
ADuM7442  
ADuM7440  
GND  
GND  
GND  
GND  
GND  
GND  
1
2
1
2
1
2
V
V
ENCODE  
ENCODE  
ENCODE  
ENCODE  
DECODE  
DECODE  
DECODE  
DECODE  
V
V
V
V
V
ENCODE  
ENCODE  
ENCODE  
DECODE  
DECODE  
DECODE  
DECODE  
ENCODE  
V
V
V
V
V
ENCODE  
ENCODE  
DECODE  
DECODE  
DECODE  
DECODE  
ENCODE  
ENCODE  
V
V
V
IA  
OA  
OB  
OC  
OD  
IA  
OA  
OB  
OC  
ID  
IA  
OA  
OB  
IC  
4
5
13  
12  
4
5
13  
12  
4
5
13  
12  
IB  
IB  
IB  
V
V
V
V
IC  
IC  
OC  
6
7
8
11  
10  
9
6
7
8
11  
10  
9
6
7
8
11  
10  
9
V
V
V
V
V
V
V
V
OD  
OD  
ID  
ID  
V
V
V
DD1B  
DD2B  
DD1B  
DD2B  
DD1B  
DD2B  
GND  
GND  
GND  
GND  
2
GND  
GND  
1
2
1
2
1
Figure 1. ADuM7440  
Figure 2. ADuM7441  
Figure 3. ADuM7442  
Rev. 0  
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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.461.3113  
www.analog.com  
©2009 Analog Devices, Inc. All rights reserved.  
 
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ADUM7440CRQZ 替代型号

型号 品牌 替代类型 描述 数据表
ADUM7440CRQZ-RL7 ADI

完全替代

 1 kV RMS Quad-Channel Digital Isolators
MAX14130FAEE+ MAXIM

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