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ADUM2250 Arkusz danych(PDF) 1 Page - Analog Devices

Numer części ADUM2250
Szczegółowy opis  Hot-Swappable, Dual I2C Isolators, 5 kV
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ADUM2250 Arkusz danych(HTML) 1 Page - Analog Devices

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Hot-Swappable, Dual I2C Isolators, 5 kV
Data Sheet
ADuM2250/ADuM2251
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007–2011 Analog Devices, Inc. All rights reserved.
FEATURES
Bidirectional I2C communication
Open-drain interfaces
Suitable for hot-swap applications
30 mA current sink capability
1000 kHz operation
3.0 V to 5.5 V supply/logic levels
16-lead SOIC wide body package version (RW-16)
16-lead SOIC wide body enhanced creepage version (RI-16)
High temperature operation: 105°C
Safety and regulatory approvals (RI-16 package)
UL recognition: 5000 V rms for 1 minute per
UL 1577
CSA Component Acceptance Notice #5A
IEC 60601-1: 250 V rms (reinforced)
IEC 60950-1: 400 V rms (reinforced)
VDE Certificate of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
VIORM = 846 V peak
APPLICATIONS
Isolated I2C, SMBus, or PMBus Interfaces
Multilevel I2C interfaces
Power supplies
Networking
Power-over-Ethernet
GENERAL DESCRIPTION
The ADuM2250/ADuM22511 are hot-swappable digital
isolators with nonlatching bidirectional communication
channels that are compatible with I2C® interfaces. This
eliminates the need for splitting I2C signals into separate
transmit and receive signals for use with standalone
optocouplers.
The ADuM2250 provides two bidirectional channels support-
ing a complete isolated I2C interface. The ADuM2251 provides
one bidirectional channel and one unidirectional channel for
those applications where a bidirectional clock is not required.
The ADuM2250/ADuM2251 contain hot-swap circuitry to
prevent data glitches when an unpowered card is inserted
onto an active bus.
These isolators are based on iCoupler® chip-scale transformer
technology from Analog Devices, Inc. iCoupler is a magnetic
isolation technology with performance, size, power consump-
tion, and functional advantages compared to optocouplers.
The ADuM2250/ADuM2251 integrate iCoupler channels
with semiconductor circuitry to enable a complete, isolated
I2C interface in a small form-factor package.
1 Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329; other patents
pending.
FUNCTIONAL BLOCK DIAGRAMS
DECODE
ENCODE
ENCODE
DECODE
DECODE
ENCODE
ENCODE
DECODE
GND1
NC
VDD1
NC
SDA1
SCL1
GND1
NC
GND2
NC
VDD2
NC
SDA2
SCL2
GND2
NC
8
7
5
6
4
3
2
1
9
10
12
11
13
14
15
16
ADuM2250
NC = NO CONNECT
DECODE
ENCODE
ENCODE
DECODE
ENCODE
DECODE
GND1
NC
VDD1
NC
SDA1
SCL1
GND1
NC
GND2
NC
VDD2
NC
SDA2
SCL2
GND2
NC
8
7
5
6
4
3
2
1
9
10
12
11
13
14
15
16
ADuM2251
NC = NO CONNECT
Figure 1. ADuM2250 Functional Block Diagram
Figure 2. ADuM2251 Functional Block Diagram


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