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[原创] Maxim MAX14827A低功耗超小型IO-Link收发器解决方案

关键词:工业应用 IO-Link收发器 MAX14827A

时间:2017-08-09 09:52:56       作者:Maxim       来源:中电网

Maxim公司的MAX14827A是低功耗超小型双驱动IO-Link收发器,工作电压从通常的24V到高达60V,具有灵活控制接口,引脚控制逻辑输入允许开关传感器不需要微控制器(MCU),集成了3.3V和5V线性稳压器,主要用在工业传感器,IO-Link传感器和激励器以及安全应用.本文介绍了MAX14827A主要优势和特性,框图,典型应用电路图以及MAX14827评估板EVK主要特性,电路图,材料清单和PCB设计图.

The MAX14827A integrates the high-voltage functionscommonly found in industrial sensors, including driversand regulators. The MAX14827A features two ultra lowpowerdrivers with active reverse-polarity protection.

Operation is specified for normal 24V supply voltagesup to 60V. Transient protection is simplified due to highvoltage tolerance allowing the use of micro TVS.

The device features a flexible control interface. Pincontrollogic inputs allow for operation with switchingsensors that do not use a microcontroller. For sensors thatuse a microcontroller, an SPI interface is available withextensive diagnostics. For IO-Link operation, a three-wireUART interface is provided, allowing interfacing to themicrocontroller UART. Finally, a multiplexed UART/SPIoption allows using one serial microcontroller interface forshared SPI and UART interfaces.

The device includes on-board 3.3V and 5V linearregulators for low-noise analog/logic supply rails.

The MAX14827A is available in a (4mm x 4mm) 24-pinTQFN package and a (2.5mm x 2.5mm) 25-pin waferlevelpackage (WLP) and is specified over the extended-40℃ to +125℃ temperature range.

MAX14827A主要优势和特性:

●● Low Power Dissipation for Small Sensors
• 2.3Ω/2.7Ω (typ) Driver On-Resistance
• 70mW (typ) Power Dissipation at 100mA (WhenBoth C/Q and DO Drivers Are Driving)
●● High Configurability and Integration Reduce SKUs
• Auxiliary 24V Digital Output and Input
• Selectable Driver Current: 50mA to 250mA
• SPI/Pin-Control Interface for Configuration andMonitoring
• Multiplexed SPI/UART Interface Option
• 5V and 3.3V Linear Regulators
• Optional External Transistor Supports HigherRegulator Load Capability
• Integrated LED Driver
●● Selectable Driver Integrated Protection EnablesRobust Communication
• 65V Absolute Maximum Ratings on Interface andSupply Pins Allows for Flexible TVS Protection
• 9V to 60V Specified Operation
• Glitch Filters for Improved Burst Resilience andNoise
• Thermal Shutdown Auto-Retry Cycling
• Hot-Plug Supply Protection
• Reverse Polarity Protection of All Sensor InterfaceInputs/Outputs
• -40 ℃ to +125 ℃ Operating Temperature Range

MAX14827A应用:

●● Industrial sensors
●● IO-Link sensors and actuators
●● Safety applications

图1.MAX14827A框图

图2. MAX14827A典型应用电路图

MAX14827评估板EVK

The MAX14827 evaluation kit (EV kit) consists of aMAX14827 evaluation board is a fully assembled and testedcircuit board that evaluates the MAX14827 IO-Link®device transceiver.

The EV kit is designed to operate as a stand-alone boardor with an mbed® board for easy software evaluation.The MAX14827 EV kit can also be used to evaluate theMAX14827A.


图3.MAX14827评估板EVK外形图

MAX14827评估板EVK主要特性:

●● IO-Link-Compliant Device Transceiver
●● IO and SPI Interface Terminals
●● Proven PCB Layout
●● Fully Assembled and Tested


图4. MAX14827评估板EVK电路图
MAX14827评估板EVK材料清单:




图5. MAX14827评估板EVK PCB设计图(1)

图6. MAX14827评估板EVK PCB设计图(2)

图7. MAX14827评估板EVK PCB设计图(3)

图8. MAX14827评估板EVK PCB设计图(4)

图9. MAX14827评估板EVK PCB设计图(5)

图10. MAX14827评估板EVK PCB设计图(6)
详情请见:
https://datasheets.maximintegrated.com/en/ds/MAX14827A.pdf
https://datasheets.maximintegrated.com/en/ds/MAX14827EVKIT.pdf
MAX14827A.pdf
MAX14827EVKIT.pdf

 

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