MAX22199

PRODUCTION

Octal Industrial Digital Input

Small, Robust, and 8-Channel Digital Input

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.60

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Overview

High Integration Reduces BOM Count and Board Space
- Eight Input Channels with Serializer
- Operates Directly from Field Supply (7V to 65V)
- Compatible with 3.3V or 5V Logic
- 5mm x 5mm TQFN Package

Reduced Power and Heat Dissipation
- 0.6mA (typ) Supply Current
- ±11% Accurate Input-Current Limiters
- Energyless Field-Side LED Drivers
- Low Power Dissipation with Negative Input Voltage

Fault Tolerant
- Input Protection to ±40V
- Integrated Field-Supply Voltage Monitors
- 5-Bit CRC SPI Error Detection

Configurability Enables Wide Range of Applications
- Configurable Input Current from 0.5mA to 3.4mA
- Selectable Input Debounce Filtering
- Current Sources Can Be Disabled
- Supports Daisy-Chain SPI and Direct SPI

Robust Design
- ±8kV Contact ESD and ±15kV Air-Gap ESD Using Minimum 1kΩ Resistor
- ±2kV Surge Tolerant Using Minimum 1kΩ Resistor
- -40°C to +125°C Ambient Operating Temperature

Advanced Diagnostics Can Be Provided by MAX22190
- Pin-to-Pin Compatible
- Register Compatible

The MAX22199 is an IEC 61131-2 compliant industrial digital input device. The MAX22199 translates eight 24V current-sinking industrial inputs to a serialized SPI-compatible output that interfaces with 3V to 5.5V logic. It can operate as eight Type 1/Type 3 digital inputs or four Type 2 digital inputs. The device provides diagnostic functions, including thermal shutdown, 24V under voltage alarm, 24V missing voltage alarm, and SPI and CRC communication error detection. All of the faults can be configured to generate an interrupt using the active-low FAULT pin.

For robust operation in industrial environments, each input includes a programmable glitch filter. Noise filters on each channel can be independently programmed to one of eight values between 50µs and 20ms or filter bypass.

The MAX22199 has a 4-pin SPI interface and, in addition, uses the active-low LATCH input for synchronizing input data sampling across multiple devices.

The MAX22199 field-side accepts a single 7V to 65V supply to the V_DD24 pin. When powered by the field supply, the MAX22199 generates a 3.3V output from an integrated LDO regulator, which can provide up to 25mA of current for external loads in addition to powering the MAX22199. Alternatively, the MAX22199 can be powered from a 3.0V to 5.5V logic side supply connected to the V_DD pin. For flexibility, the SPI interface operates at 3.3V or 5V logic levels as controlled by the V_L pin.

Applications

Building Automation
Distributed Control System
Motor Control
Programmable Logic Controllers

Part Models: 2
1ku List Price: Starting From $2.60

Documentation

Data Sheet 1

MAX22199: Octal Industrial Digital Input Data Sheet (Rev.0) 11/12/2021

Technical Articles 1

How to Design Digital Input Modules with Parallel Interface Using Industrial Serialized Digital Inputs 07/15/2025

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX22199ATJ+	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX22199ATJ+T	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

Software Development 1

MAX22199 EV Kit Software, 1.0.0

IBIS Model 1

MAX22199 IBIS Model

Evaluation Kits

Evaluation Kit for the MAX22199

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Features and Benefits

Easy Evaluation of the MAX22199
EV Kit Logic Side is USB-Powered
Configured for IEC 61131-2 Type 1, 3
Galvanic Isolation using MAX14483
Supports Transient Immunity Testing to IEC 61000-4- 2, IEC 61000-4-4, and IEC 61000-4-5

Robust Design ±2kV Surge Tolerant Line-to-Ground and Line-to-Line, ±8kV Contact ESD, and ±15kV Air-Gap ESD at field inputs
Windows^® 10 Compatible Software
Fully Assembled and Tested
Proven PCB Layout
RoHS Compliant

Product Details

The MAX22199 evaluation kit (EV kit) provides the hardware and software necessary to evaluate the MAX22199 Octal Industrial Digital Input device. The MAX22199 EV kit receives commands from a PC through the USB port to create a SPI interface for communication between the software and the MAX22199 on the EV kit. The MAX22199 EV kit also has a Pmod™ compatible connector for SPI communication with an external host device such as a MCU or FPGA.

The EV kit includes a graphical user interface (GUI) that provides communication between the target device and the PC. The MAX22199 EV kit has a MAX22199 device that supports Type 1, 3 inputs with the current sink limit set by an on-board resistor. The MAX22199 EV kit is designed to support transient immunity testing for ESD, EFT, and Surge according to IEC 61000-4-2, IEC 61000- 61000-4-4, and IEC 61000-4-5 respectively. The EV kit can operate in multiple modes, as shown in the System Block Diagram:

1) USB Mode: If SW1 are all closed, the MAX22199 SPI receives commands through the USB port from the Maxim-supplied EV kit software.

2) Pmod Mode: If SW1 are all open, the MAX22199 SPI receives commands through the PMOD1 connector. This industry standard connector connects to popular MCU or FPGA platforms. The user is required to generate firmware to provide the SPI commands.