LTC9111

Industrial SPoE PD Controller

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Recommended for New Designs

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Overview

Features and Benefits
Product Details

Features and Benefits

IEEE 802.3cg Compliant
Wide Input Voltage Range: 2.3V to 60V
Supports Serial Communication Classification Protocol (SCCP)
Wakeup Signature
Integrated 3.5V Standby Regulator
150μA Maximum Current During Classification

Drives Low-Side Bridge MOSFETs for Polarity Correction
Charge Pump Enhances External N-Channel MOSFET
Pin Programmable Class Configuration
Available in 12-Pin MSOP and DFN 4mm × 3mm Packages

Product Details

The LTC9111 is an IEEE 802.3cg compliant Single-Pair Power over Ethernet (SPoE) Powered Device (PD) controller. A wide 2.3V to 60V operating range capability with polarity correction make the LTC9111 particularly well suited for classification-based systems in building and factory automation.

SCCP-based classification ensures full operating voltage is applied by the Power Sourcing Equipment (PSE) only when a valid PD is connected. The LTC9111 drives two external N-channel MOSFET switches during classification with micropower operation to minimize reservoir capacitor requirements. An external N-channel MOSFET switch isolates the output capacitance from the connector during classification and inrush. A voltage supervisor enables the external MOSFET when the PD input voltage exceeds the ON voltage threshold for the configured class and after a mandated delay. The EN output asserts after the controlled GATE pin ramp-up. The MOSFET is disabled if the input voltage drops below the OFF voltage threshold for the configured class. The LTC9111 drives a pair of external low-side N-channel MOSFETs with a low start-up voltage of 1.6V for polarity correction with reduced power losses.

APPLICATIONS

Building Automation
Factory Automation
Security Systems
Traffic Control Systems

Product Categories

Power Monitor, Control, and Protection
- PoE Powered Device (PD)

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Product Lifecycle Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

AD-SWIOT1L-SL

Software-configurable Analog and Digital I/O with 10BASE-T1L Evaluation and Development Platform

AD-SWIOT1L-SL

View Detailed Evaluation Kit Information

The AD-SWIOT1L-SL provides a complete software and hardware platform for prototyping intelligent, secure, network capable field devices.

The design incorporates the AD74413R Quad-Channel, Software Configurable Input and Output and the MAX14906 Quad-Channel Industrial Digital Output/Digital Input ICs, allowing the multiplexing of several analog and digital functions on four channels which can be independently configurable through software to act as:

voltage output / input
current output / input
digital input / output
RTD measurement

A 10 Mbps single-pair Ethernet link, using the ADIN1110 10BASE-T1L MAC/PHY, enables remote data acquisition and device configuration. The 10BASE-T1L interface can also be used for powering the system via the Single-pair Power over Ethernet (SPoE) technology using the LTC9111 Powered Device (PD) controller. This way, power and data for the system is provided over the same cable to significantly simplify the cabling infrastructure and cost.

For applications requiring high current capabilities, the system can be powered from an external 24 V supply and up to 1.2 A can be output on any of the channels configured as digital outputs. The power supply solution also includes the ADP1032 high performance, isolated micropower management unit (PMU) to provide power and digital control for software configurable I/O devices in one of the most compact formats. The LT8304 Micropower No-Opto Isolated Flyback Converter completes the power tree to provide isolated power to the digital part of the design.

The on-board MAX32650 Ultralow Power ARM^® Cortex^®-M4 Microcontroller exposes all the necessary debug and programming features to enable a complete software development experience with the system. It is coupled with a 1 Gb (128 MB) external RAM and a 64 Mb (8 MB) external flash memory to meet the most demanding applications and provide the flexibility to implement any protocol stack. Security features are enabled by the MAXQ1065 security coprocessor.

The system is accompanied by an open-source software stack and associated collateral, enabling a complete experience from evaluation and prototyping all the way to production firmware and applications development. An external programmer such as the MAX32625PICO MAXDAP Programming Adapter, or any other similar programmer supporting the SWD interface, is required to enable firmware programming and debug. The system’s firmware is based on Analog Devices’ open-source no-OS framework which includes all the tools required for embedded code development and debugging as well as libraries enabling host-side connectivity for system configuration and data transfer over the UART or the 10BASE-T1L interfaces. A PC application with a user-friendly graphical interface is provided to enable easy system configuration and displaying the acquired data in different ways.

Specifications
I/O
Channels	4 Software Configurable IO channels
Digital input	Type 1 and 3, or Type 2
Digital output	High-Side (HS) Switch or Push-Pull (PP) Driver
Analog input	Voltage (0 V to 10 V), Current (0 mA to 25 mA)
Analog output	Voltage (0 V to 11 V), Current (0 mA to 25 mA)
RTD measurements	2-wire RTD (0 Ω to 1 MΩ)
Computing Resources
CPU	MAX32650 Ultra-Low-Power Arm Cortex-M4 with FPU-Based Microcontroller (MCU) with 3 MB Flash and 1MB SRAM
Memory	1 Gb RAM
Storage	64 Mb QSPI Flash
Connectivity
Ethernet	10BASE-T1L
Power Supply
External power	24 DC @ 6A
Power over Ethernet	SPoE class 12
Operating Conditions
Temperature range	-25°C to 60°C

Features & Benefits

Allows prototyping of intelligent, secure, and connected process control devices
Ultimate flexibility in I/O interface configurability through software
Embedded processing for implementing self-capable edge devices
Long-range single-pair 10BASE-T1L Ethernet interface
Power delivery via the 10BASE-T1L interface or from a field supply enabling both low and high power applications
Fully isolated design for safe operation
Industry standard form factor compatible with DIN rail mounts

Resources

Software

AD-SWIOT1L-SL Software

Documentation & Resources

Data Sheets

LTC9111: Industrial SPoE PD Controller Data Sheet (Rev. 0)
9/19/2022
PDF

Webcasts

10Base-T1 System Design Considerations (EngineerZone)
7/29/2022

Videos

LTC4296-1/LTC9111: SPoE PSE and PD Controllers
6/12/2023

Reference Designs (1)

CN0575

10BASE-T1L Field Device Development Platform with Class 12 and 13 SPoE

CN0575

10BASE-T1L Field Device Development Platform with Class 12 and 13 SPoE

CN0575

10BASE-T1L Field Device Development Platform with Class 12 and 13 SPoE

View Detailed Reference Design Information

Features & Benefits

Data and Power Delivery using Single Pair Power over Ethernet
Power Class 12 and 13 Delivery Capable
Supports Longer Distances up to 1 km
Provides Speeds up to 10 MBPS
Works with Existing Software Stacks like PROFINET, EtherCat, MOD-BUS, and others

Parts Used

Resources

CN0575 Design Files

ZIP

3.89 M

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LTC9111RDE#PBF	Material Declaration	Reliability Data	12-Lead DFN (4mm x 3mm w/ EP)	Ultra Librarian SamacSys
LTC9111RDE#TRPBF	Material Declaration	Reliability Data	12-Lead DFN (4mm x 3mm w/ EP)	Ultra Librarian SamacSys
LTC9111RMSE#PBF	Material Declaration	Reliability Data	12-Lead MSOP w/ EP	Ultra Librarian SamacSys
LTC9111RMSE#TRPBF	Material Declaration	Reliability Data	12-Lead MSOP w/ EP	Ultra Librarian SamacSys
Wafer Fabrication Data

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.