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[原创] ADI ADM3055E带信号隔离通道CAN物理层收发器解决方案

关键词:电源管理 DC/DC转换器 iCoupler isoPower ADM3055E

时间:2019-01-23 10:29:26       作者:ADI       来源:中电网

ADI公司的ADM3055E是集成了逻辑侧开关键控(OOK)信号隔离通道和isoPower® DC/DC 转换器的控制器局域网(CAN)物理层收发器,满足CAN FD规范,工作速率5Mbps或更高的12 Mbps,和ISO 11898-2: 2016标准兼容.隔离电压5 kV rms/3 kV rms,工作温度−40℃到+105℃,主要用在CANOpen,DeviceNet和其它CAN总线,工业自动化,过程控制和建筑物控制,交通和基础设备.本文介绍了ADM3055E/ADM3057E主要特性,框图,以及评估板EVAL-ADM3055EEBZ主要特性,电路图,材料清单和PCB设计图.

The ADM3055E/ADM3057E are 5 kV rms and 3 kV rms isolated controller area network (CAN) physical layer transceivers with integrated isolated dc-to-dc converters. The ADM3055E/ ADM3057E meet flexible data rate (CAN FD) requirements for operation to 5 Mbps and higher and comply with the ISO 11898-2: 2016 standard. The ADM3055E/ADM3057E are capable of supporting data rates as high as 12 Mbps.

The devices employ Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a CAN transceiver, and an Analog Devices isoPower® dc-to-dc converter into a single, surface-mount, small outline integrated circuit (SOIC) package. The devices are powered by a single 5 V supply, realizing a fully isolated solution for CAN and CAN FD. Radiated emissions from the high frequency switching of the dc-to-dc convertors are kept below EN 55022 Class B limits by continuous adjustments to the switching frequency.

The ADM3055E/ADM3057E provide complete isolation between the CAN controller and physical layer bus. Safety and regulatory approvals (pending) for 5 kV rms isolation voltage, 10 kV surge test, and 8.3 mm creepage and clearance ensure the ADM3055E meets application reinforced isolation requirements. The ADM3057E has an isolation voltage of 3 kV rms and 7.8 mm creepage in a 20-lead, wide body SOIC.

Low propagation delays through the isolation support longer bus cables. Slope control mode is available for standard CAN at low data rates. Standby mode minimizes power consumption when the bus is idle or if the node goes offline. Silent mode allows the TXD input to be ignored for listen only mode.

Dominant timeout functionality protects against bus lock up in a fault condition. The current limiting and thermal shutdown features protect against output short circuits. The devices are fully specified over an industrial temperature range of −40℃ to +105℃.

ADM3055E/ADM3057E主要特性:

5 kV rms/3 kV rms signal and power isolated CAN transceivers
isoPower integrated isolated dc-to-dc converter
VIO pin for 1.7 V to 5.5 V logic levels
ISO 11898-2:2016 compliant (CAN FD)
Data rates up to 12 Mbps for CAN FD
Low maximum loop propagation delay: 150 ns
Extended common-mode range: ±25 V
Bus fault protection: ±40 V on CANH and CANL pins
Low power standby support remote wake request
Extra isolated signal for control (such as termination switches)
Passes EN 55022 Class B by 6 dB
Slope control for reduced EMI
Safety and regulatory approvals (ADM3055E)
VDE certificate of conformity, VDE V 0884-10 (pending)
VIORM = 849 VPEAK
UL: 5000 V rms for 1 minute per UL 1577 (pending)
CSA Component Acceptance Notice 5A (pending)
IEC 60950-1, IEC 61010-1
Creepage and clearance
ADM3055E: 8.3 mm minimum with 20-lead SOIC_IC
ADM3057E: 7.8 mm minimum with 20-lead SOIC_W
High common-mode transient immunity: >75 kV/μs
Industrial operating temperature range: −40℃ to +105℃

ADM3055E/ADM3057E应用:

CANOpen, DeviceNet, and other CAN bus implementations
Industrial automation
Process control and building control
Transport and infrastructure

图1.ADM3055E/ADM3057E功能框图

评估板EVAL-ADM3055EEBZ

The EVAL-ADM3055EEBZ allows the user to evaluate the ADM3055E and the ADM3057E isolated signal and power transceivers for controller area network (CAN) or CAN with flexible data rate (CAN FD) networks. The EVAL-ADM3055EEBZ allows all of the input and output functions to work without the need for external components.

Based on the Analog Devices, Inc., iCoupler® technology, the ADM3055E and the ADM3057E integrate logic side on-off keying (OOK) signal isolation channels and an Analog Devices isoPower® dc-to-dc converter to provide regulated, isolated power that is well below EN55022 Class B limits when transmitting on a 2-layer printed circuit board (PCB) with ferrites.

The EVAL-ADM3055EEBZ comes populated with an ADM3055E. Full specifications of the ADM3055E and the ADM3057E can be found in the ADM3055E and the ADM3057E data sheets, available from Analog Devices and must be consulted in conjunction with this user guide when using the EVAL-ADM3055EEBZ.

The EVAL-ADM3055EEBZ is compatible and can be used to evaluate the ADM3057E. The ADM3055E and the ADM3057E differ by package and isolation capabilities, but both devices are functionally equivalent for evaluation.

评估板EVAL-ADM3055EEBZ主要特性:

ADM3055E with isoPower integrated, isolated, dc-to-dc converter
2-layer PCB with low radiated emissions, passes EN55022 Class B
On-board LDO for 6 V to 9 V supply, providing 5 V to the ADM3055E VCC pin
Screw terminal connectors include
6 V to 9 V LDO, 5 V power supply to the VCC pin and the VIO pin
5 V direct power supply to VCC pin
1.7 V to 5.5 V direct power supply to the VIO pin
TXD pin, RXD pin, STBY pin, SILENT pin, AUXIN pin, AUXOUT pin, and RS pin signals
Divided PCB return planes for GND1 and GND2
SMA connectors for TXD pin and RXD pin signals

评估板EVAL-ADM3055EEBZ包括:

EVAL-ADM3055EEBZ evaluation board
ADM3055EBRIZ
ADP7104
LTC6900

图2.评估板EVAL-ADM3055EEBZ外形图

图3.评估板EVAL-ADM3055EEBZ电路图
评估板EVAL-ADM3055EEBZ材料清单:


图4.评估板EVAL-ADM3055EEBZ PCB设计图(1):顶层丝印

图5.评估板EVAL-ADM3055EEBZ PCB设计图(2):顶层布局

图6.评估板EVAL-ADM3055EEBZ PCB设计图(3):底层

图6.评估板EVAL-ADM3055EEBZ PCB设计图(3):底层丝印
详情请见:
https://www.analog.com/media/en/technical-documentation/data-sheets/ADM3055E-3057E.pdf
https://www.analog.com/media/en/technical-documentation/user-guides/EVAL-ADM3055EEBZ-UG-1372.pdf
ADM3055E-3057E.pdf
EVAL-ADM3055EEBZ-UG-1372.pdf

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