详解ADI公司的ADM3055E产品

ADI公司的ADM3055E是集成了隔离DC/DC转换器的5kVrms隔离的CAN物理层收发器,满足CAN灵活数据(FD)速率要求,可以工作高达5Mbps或更高,并和ISO 11898-2标准兼容.器件采用ADI的iCoupler®技术,把三路隔离器,CAN收发器和ADI isoPower® DC/DC转换器集成在SOIC表面安装封装中,工作电压5V,工作温度−40℃到 +105℃,主要用在CANOpen,DeviceNet和其它CAN总线应用,工业自动化,过程控制和建筑物控制以及交通运输和基础设备.本文介绍了ADM3055E主要特性和功能框图,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 is a 5 kV rms isolated controller area network (CAN) physical layer transceiver with an integrated isolated dc-to-dc converter. The ADM3055E meets CAN flexible data (FD) rate requirements for operation to 5 Mbps and higher, and complies with the ISO 11898-2 standard.

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

The ADM3055E provides complete isolation between the CAN controller and physical layer bus. Safety and regulatory approvals (pending) for 5 kV withstand voltage, 565 VPEAK working voltage, 10 kV surge test, and 8.3 mm creepage and clearance ensure that the ADM3055E meets application isolation requirements.

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.

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 device is fully specified over an industrial temperature range of −40℃to +105℃.

ADM3055E主要特性:

5 kV rms signal and power isolated CAN transceiver
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
VDE certificate of conformity, VDE V 0884-10 (pending): VIORM = 565 VPEAK
UL: 5000 V rms for 1 minute per UL 1577 (pending)
CSA Component Acceptance 5A at 5 kV rms (pending)
IEC 60950-1, IEC 61010-1
Creepage and clearance: 8.3 mm with 20-lead SOIC_IC
High common-mode transient immunity: >75 kV/μs
Industrial temperature range: −40℃to +105℃

ADM3055E应用:

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

图1.ADM3055E功能框图

评估板EVAL-ADM3055EEBZ

The EVAL-ADM3055EEBZ allows the user to evaluate the ADM3055E isolated signal and power transceiver 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 integrates 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 CISPR22/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 can be found in the ADM3055E data sheet, available from Analog Devices, Inc., and must be consulted in conjunction with this user guide when using the EVAL-ADM3055EEBZ.

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 CISPR22/EN55022 Class B
On-board LDO for 6 V to 9 V supply, providing 5 V to the ADM3055E VCC pin
Screw terminal connectors for the following:
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
1.8 V to 5.0 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

图6.评估板EVAL-ADM3055EEBZ PCB设计图(3):底层

图7.评估板EVAL-ADM3055EEBZ PCB设计图(4):底层丝印