MAX14906

PRODUCTION

Quad-Channel Industrial Digital Output, Digital Input

Robust, Compact, Fully Configurable Multi-Channel DIO with SafeDemagTM

Data Sheet (Rev. 4) Product Selection Table
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Overview

  • Per-Channel Configurability Enables Wide Range of Applications 
    • Digital Output: High-Side (HS) Switch or Push-Pull (PP) Driver
    • Digital Input: Software Selectable Type 1 and 3, or Type 2
    • Current Limit Settable from 130mA to 1.2A
    • Serial (SPI) or Direct Operation Using Pins
    • Independent Channel Powering
  • Fault Tolerant with Built-In Diagnostics
    • Per-Channel Diagnostics
    • Integrated Voltage Supply Monitoring and Short-to-VDD Detection
    • Open-Wire/Open-Load Detection 
    • Thermal Shutdown Protection
    • Watchdog Timer
    • 5-Bit CRC Code Generation and Checking for SPI Error Detection
  • High Integration Reduces BOM Count and PCB Space 
    • Integrated LDO Compatible with 5V Logic Devices
    • Internal Active Clamps for Fast Inductive Load Turn-Off 
    • 0.6μs (typ) DO and 1μs (typ) DI Propagation Delays
    • Addressable SPI
    • 7mm x 7mm TQFN Package
  • Reduced Power and Heat Dissipation
    • Low RDSON for High-Side Switches, 120mΩ (typ)
    • Accurate Output Current Limiting
    • Accurate Input Current Sinks, Type 1 and 3, or Type 2
  • Robust Design
    • 10V to 40V Operating Supply Range, 65V Tolerant
    • SafeDemagTM Allows Fast Turn-Off of Unlimited Inductance
    • ±16kV Air-Gap ESD and ±8kV Contact ESD
    • ±1kV Surge Tolerant Using TVS Protection on VDD to GND
    • -40°C to +125°C Operating Temperature

The MAX14906 is an IEC 61131-2 compliant, high-speed, four-channel industrial digital output, digital input device that can be configured on a per-channel basis as a high-side (HS) switch, push-pull (PP) driver, or a Type 1 and 3, or Type 2 digital input. The MAX14906 is specified for operation with a supply voltage up to 40V and is tolerant to 65V.

The high-side switch current limiting is settable from 130mA to 1.2A with the option of 2x load inrush current. The high-side driver on-resistance is 120mΩ (typ) at 25°C ambient temperature. Optional push-pull operation allows high speed driving of cables and fast discharge of load capacitance. For digital input operation, current sinks for 2.3mA (Type 1 and 3) or 7mA (Type 2) are provided.

The SPI interface has a built-in chip addressing decoder, allowing communication with multiple MAX14906 devices utilizing a shared SPI with a common chip select active-low CS. The SPI interface provides flexibility for global and per-channel configuration and diagnostics, including supply overvoltage and undervoltage detection, wire-break or open-wire detection, thermal overload and current limit reporting, and more. For high-speed operation, the digital input and output states can be monitored and changed directly using pins for increased system speed and throughput.

Open-wire detection monitors open-wire/open-load conditions with switches in the off state. LED drivers provide indication of per-channel fault, status, and supply undervoltage conditions. Internal active clamps allow for fast turn-off of inductive loads. Integrated line-to-ground and line-to-line surge protection only requires a TVS on VDD.

The MAX14906 is available in a compact 48-pin 7mm x 7mm QFN package.

Applications

  • Industrial Digital Output and Input Module
  • Configurable Digital Input/Output
  • Motor Control
  • PLC Systems
  • Distributed Control Systems (DCS)
MAX14906
Quad-Channel Industrial Digital Output, Digital Input
MAX14906: Functional Diagram
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Documentation

Data Sheet 1

Application Note 3

Technical Articles 2

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Software Resources

Device Drivers 2

Tools & Simulations

Software Development 3

IBIS Model 1

Evaluation Kits

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EVAL-AD74413R-DIOZ

Evaluating the AD74413R-DIOZ Quad-Channel Software Configurable Input and Output

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Features and Benefits

  • Quad-channel, software configurable input and output functionality for the AD74413R and the MAX14906
  • Single, 24 V external supply
  • On-board MAX14483, 6-channel, low power, 3.75 kV RMS SPI digital isolator
  • On-board MAX17552, 60 V, 100 mA, ultrasmall, high-efficiency, synchronous step-down DC-to-DC converter
  • Windows GUI for control

Product Details

The EVAL-AD74413R-DIOZ (see Figure 1 in the user guide) is an evaluation board used to demonstrate and evaluate the full software configurable input and output (SWIO) features that the AD74413R and the MAX14906 provide when working together. The board has functionality for digital input, digital output, analog input, and analog output. The EVAL-AD74413R-DIOZ is controlled with a USB2PMB2 adapter board. The USB2PMB2 board controls the EVAL-AD74413R-DIOZ board via the USB port of a PC using the AD74413R-DIOZ demo software.

The EVAL-AD74413R-DIOZ requires an analog power (AVDD) operating supply of 14 V to 28.8 V. The USB2PMB2 board is supplied from the PC.

See the AD74413R data sheet for more information about the AD74413R, and see the MAX14906 data sheet for more information about the MAX14906. Users must consult both data sheets in conjunction with the user guide when using the EVAL-AD74413RDIOZ.

eval board
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AD-SWIOT1L-SL

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

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Features and 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

Product Details

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

eval board
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MAX14906EVKIT

Evaluation Kit for the MAX14906

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Features and Benefits

  • Easy Evaluation of the MAX14906 with Per-Channel Configuration
  • SafeDemag™ for Safe Turn-Off of Unlimited Inductance in Digital Output Modes
  • Configurable for IEC 61131-2 Type 1 and 3, or Type 2 Digital Input
  • Support up to 3.75kVRMS Galvanic Isolation with MAX14483 and MAX14937
  • Support Communicating with External Microcontroller or FPGA
  • Allow Output Switching with High-Speed Parallel Interface or SPI Serial Interface
  • Windows® 10, Windows 8.1, and Windows 7 Compatible GUI Software
  • Proven PCB Layout
  • Fully Assembled and Tested
  • RoHS Compliant

Product Details

The MAX14906 evaluation kit (EV kit) provides a proven design to evaluate the MAX14906, a four-channel industrial digital-output, digital-input device. The EV kit allows the MAX14906 to be configured on a per-channel basis as either a digital output (in High-Side switch or Push-Pull driver configuration) or a Type 1 and 3, or Type 2 digital input. The EV kit monitors the MAX14906 diagnostic information, including open-wire condition, state of the output channels, multiple undervoltage alarms, global and per-channel overtemperature alarms, and multiple fault alarms.

The EV kit must be powered from an external 24V DC power supply that can provide up to 6.4A (max), when all DOI_ output channels are fully loaded with the option of 2x load inrush current.

The MAX14906 EV kit communicates with a graphical user interface (GUI) on a PC through a USB port. The EV kit features an on-board FT2232 controller interfacing to the MAX14906 control signals. Alternatively, an external SPI interface from a microcontroller or FPGA can be used through the 20-pin header (J13).

The MAX14906 EV kit comes with the MAX14906ATM+ installed in a 48-pin, 7mm x 7mm QFN package.

Applications

  • Configurable Digital Input/Output
  • Distributed Control Systems (DCS)
  • Industrial Digital Output and Input Module
  • Motor Control
  • PLC Systems

eval board
schematic 9
MAX14906PMB

Evaluation Kit for the MAX14906

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Features and Benefits

  • Easy Evaluation of the MAX14906
  • Configurable as Type 1/3 or Type 2 Digital Input or High-Side or Push-Pull Digital Output
  • SafeDemag™ for Safe Turn-Off of Unlimited Inductance in Digital Output Modes
  • Accurate Internal Current Limiter for Type 1/3 or Type 2 Digital Inputs
  • Support Load Current Up to 1.2A per Channel
  • Works with USB2PMB2# or USB2GPIO# Adapter and Munich GUI Software
  • Fully Assembled and Tested
  • Proven PCB Layout
  • RoHS Compliant

Product Details

The MAX14906 peripheral module provides the hardware to evaluate the MAX14906 four-channel configurable industrial digital input/output (DIO) device. Refer to the MAX14906 IC data sheet for detailed information regarding the operation of the IC. The module takes advantage of the features in the MAX14906 that allow DOI_ to be configured as a high-side or push-pull digital output, or a type 1/3 or type 2 digital input. The external pMOS on board allows the DOI_ to go higher than the 24V field supply for full IEC 61131-2 digital input compatibility.

Note: The module provides a subset of the MAX14906 features. For greater flexibility, refer to the MAX14906 Evaluation Kit.

The MAX14906PMB# has a 12-pin Pmod™-compatible connector for SPI communication. The peripheral module can be used in various ways; Analog Devices sells the low-cost USB2PMB2# and USB2GPIO# adapter boards that use the Munich GUI software for SPI communication through a USB cable. This is not included with this board but is available from Analog Devices or one of its distributors. Alternatively, any microcontroller or FPGA with a 12-pin Pmod-compatible connector for SPI communication can be used.

The PCB dimension is just 62mm x 22.6mm, with the width determined by the size of the DOI terminal block J2. Figure 1 shows the MAX14906PMB# board photo.

Applications

  • Configurable Digital Input/Output
  • Distributed Control Systems (DCS)
  • Industrial Digital Output and Input Module
  • Motor Control
  • PLC Systems
EVAL-AD74413R-DIOZ
Evaluating the AD74413R-DIOZ Quad-Channel Software Configurable Input and Output
EVAL-AD74413R-DIOZ Evaluation Board EVAL-AD74413R-DIOZ Evaluation Board - Top View EVAL-AD74413R-DIOZ Evaluation Board - Bottom View
AD-SWIOT1L-SL
Software-configurable Analog and Digital I/O with 10BASE-T1L Evaluation and Development Platform
AD-SWIOT1L-SL Block Diagram AD-SWIOT1L-SL AD-SWIOT1L-SL - Top View AD-SWIOT1L-SL GUI view
MAX14906EVKIT
Evaluation Kit for the MAX14906
MAX14906EVKIT: Board Photo
MAX14906PMB
Evaluation Kit for the MAX14906
MAX14906PMB: Board Photo

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