Datasheet > ADUM1255

ADUM1255

更新时间： 2024-11-19 17:01:59

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
18页	1688K
描述
I2C Isolator with Unidirectional SCL, Idle-bus Hotswap and Low VOL

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中文翻译

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ADUM1255 数据手册

I²C Isolator with Unidirectional SCL, Idle-bus

Hotswap and Low V_OL

ADuM1255

General Description

Benefits and Features

The ADuM1255 offers two open-drain channels, one

•

Low V

for Greater I C Device Compatibility

OL(MAX)

unidirectional and one bidirectional for applications,

• Side 1: 0.69V

• Side 2: 0.4V

such as I C, that require data to be transmitted in both

directions on the same line, but have a unidirectional

clock. To prevent latch-up action, side 1 outputs

•

Independent V

/V Supplies Support 3.3V and

DD1 DD2

5V Logic Voltage Levels and Allow Level Shifting

2.25V to 5.5V for Both Sides

Hot-Swappable Side 2 I/O Prevents Data Corruption

comprise special buffers that regulate the logic-low

voltage at 0.64V, and the input logic-low threshold is at

least 50mV lower than the output logic-low voltage. Side

2 features conventional buffers that do not regulate

logic-low output voltage.

•

Initial Side 2 Connection Occurs at Bus Idle or

Stop States

The ADuM1255 features independent 2.25V to 5.5V

supplies on both side 1 and side 2 of the isolator. The

device operates up to 2MHz.

•

Bidirectional I C Data Transfer up to 2MHz SCL

Strong Current Sinking Enables Lower R

PULL-UP

Values for Faster Bus Speeds

• Side 1: 5mA

• Side 2: 50mA

The ADuM1255 provides

a disturbance-free bus

connection for hot-plug connections on side 2 by first

precharging the bus pins and then monitoring the bus

•

Robust Galvanic Isolation of Digital Signals

• Continuously Withstands (V

state for either an idle bus or detection of an I C stop

)

IOWM

RMS

condition before connecting side 1 and side 2.

- 8-Narrow SOIC: 445V

• Withstands ±10kV Surge per IEC 61000-4-5

• Package Creepage and Clearance

- 8-Narrow SOIC: 4mm

The ADuM1255 is available in an 8-pin narrow-body

SOIC package. The devices are rated for operation at

ambient temperatures of -40°C to +125°C.

Safety and Regulatory Approvals (Pending)

• IEC60747-17 (Pending)

- Reinforced VIORM Narrow SOIC: 630VPEAK

• UL 1577 (Pending)

- 8-Narrow SOIC: 3000VRMS for 1min

• IEC/EN/CSA 62368-1 (Pending)

• IEC/EN/CSA 61010-1 (Pending

• CAN/CSA-C22.2 No. 14-18 (Pending)

Key Applications

•

Isolated I C/SMBus Interface

Battery Management Systems

Power Over Ethernet (PoE)

Motor Control Systems

Simplified Application Diagram

3.3V

Ordering Information appears at end of data sheet.

0.1µF

1nF

0.1µF

1nF

DD2

DD1

ADuM1255

SDA1

SCL1

SDA

SCL

SDA

SCL

SDA2

SCL2

µC

GND2

GND1

19-101763; Rev 0; 10/23

12 3 4 5 6 7...18

中文翻译

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