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參數(shù)資料
| 型號： | ADUM2251ARWZ-RL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Hot-Swappable, Dual I2C Isolators, 5 kV |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封裝： | ROHS COMPLIANT, MS-013AA, SOIC-16 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 221K |
| 代理商： | ADUM2251ARWZ-RL |
Hot-Swappable, Dual I
2
C Isolators, 5 kV
ADuM2250/ADuM2251
FEATURES
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 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: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
1
Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329; other patents
pending.
FUNCTIONAL BLOCK DIAGRAMS
Bidirectional I
2
C 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
Wide body, 16-lead SOIC package with >8 mm creepage
High temperature operation: 105°C
Safety and regulatory approvals
UL recognition (pending)
5000 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
V
IORM
= 846 V peak
APPLICATIONS
Isolated I
2
C, SMBus, or PMBus Interfaces
Multilevel I
2
C interfaces
Power supplies
Networking
Power-over-Ethernet
GENERAL DESCRIPTION
The ADuM2250/ADuM2251
1
are hot-swappable digital
isolators with nonlatching bidirectional communication
channels that are compatible with I
2
C interfaces. This
eliminates the need for splitting I
2
C signals into separate
transmit and receive signals for use with standalone
optocouplers.
The ADuM2250 provides two bidirectional channels support-
ing a complete isolated I
2
C 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
i
Coupler chip-scale transformer
technology from Analog Devices, Inc.
i
Coupler is a magnetic
isolation technology with performance, size, power consump-
tion, and functional advantages compared to optocouplers.
The ADuM2250/ADuM2251 integrate
i
Coupler channels
with semiconductor circuitry to enable a complete, isolated
I
2
C interface in a small form-factor package.
DECODE
ENCODE
ENCODE
DECODE
DECODE
ENCODE
ENCODE
DECODE
GND
1
NC
V
DD1
NC
SDA
1
SCL
1
GND
1
NC
GND
2
NC
V
DD2
NC
SDA
2
SCL
2
GND
2
NC
0
8
7
5
6
4
3
2
1
9
10
12
11
13
14
15
16
ADuM2250
NC = NO CONNECT
Figure 1. ADuM2250 Functional Block Diagram
DECODE
ENCODE
ENCODE
DECODE
ENCODE
DECODE
GND
1
NC
V
DD1
NC
SDA
1
SCL
1
GND
1
NC
GND
2
NC
V
DD2
NC
SDA
2
SCL
2
GND
2
NC
0
8
7
5
6
4
3
2
1
9
10
12
11
13
14
15
16
ADuM2251
NC = NO CONNECT
Figure 2. ADuM2251 Functional Block Diagram
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