MAX22191
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MAX22191

Ultra-Low-Power, Parasitically Powered Digital Input

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Industry's Smallest, Robust, Digital Input

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Part Details
Part Models 2
1ku List Price Starting From $0.75
Features
  • High Integration for Flexible Circuit Designs
    • Interfaces to Optocouplers or Digital Isolators
    • Capable of Driving an Optocoupler and Status LED
    • Operational as Sink or Source Digital Input
    • Ultra-High Speed: 250ns (max) Propagation Delay
    • Test Pulse Diagnostic
    • Allows for Small Footprint TVS Surge Protection
  • Reduced Power and Heat Dissipation
    • Parasitically Powered from the Field Input
    • Accurate ±15% Input-Current Limiting
    • 100µA (typ) Quiescent Current with Optocoupler
    • 96% (typ) Current-Transfer Efficiency to Optocoupler
  • Robust Design
    • Operates from -60V to +60V Input Voltage
    • -40°C to +125°C Ambient Operating Temperature
Additional Details
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The MAX22191 is an IEC 61131-2 compliant, industrial digital input (DI) device. The MAX22191 translates a 24V industrial switching signal to a 3.3V/5V CMOS-level output, or to a 2.3mA (typ) current output for driving an optocoupler and/or LED. Voltage thresholds and current levels in the MAX22191 are compliant with Type 1 and Type 3 inputs, while minimizing power dissipation. The MAX22191 is also compliant with 48V inputs, with the addition of external resistors.

Operating power is derived from the input signal, eliminating the need for an external field-side power supply. A 250ns (max) fast response time is ideal for high-speed inputs. Additionally, a CMOS-compatible test input is available for safety diagnostics.

The MAX22191 features robust functionality for harsh industrial systems and is capable of normal operation with input signals ranging from -60V to +60V. Integrated thermal shutdown further protects the device when VCC is present.

The MAX22191 is available in a small, 6-lead SOT23 package and operates over the -40°C to +125°C ambient temperature range.

Design Solution: Worried About Heat in Your I/O Module? No Need to Sweat ›

Applications

  • Current Sourcing Inputs
  • Individually Isolated Inputs
  • Industrial Automation
  • Motor Controls
  • Process Automation
Part Models 2
1ku List Price Starting From $0.75

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Jan 11, 2021

- 1703RN

ASSEMBLY

MAX22191AUT+

PRODUCTION

MAX22191AUT+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Jan 11, 2021

- 1703RN

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ASSEMBLY

MAX22191AUT+

PRODUCTION

MAX22191AUT+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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MAX22191PMB

Evaluation Kit for the MAX22191 Peripheral Module

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MAX22191PMB

Evaluation Kit for the MAX22191 Peripheral Module

Evaluation Kit for the MAX22191 Peripheral Module

Features and Benefits

  • Easy Evaluation of the MAX22191
  • Isolated, Paristically Powered and Logic-Powered Circuits for Easy Evaluation
  • Proven PCB Layout
  • Works with USB2PMB2# or USB2GPIO# Adapter and Munich GUI Software

Product Detail

The MAX22191PMB# peripheral module provides the hardware to evaluate the MAX22191 parasitically powered digital input. Refer to the MAX22191 IC data sheet for detailed information regarding operation of the IC. The PMB features two circuits: one for isolated parasitically powered circuit (using an optoisolator) and one for a 24V input signal with the circuit powered from a low-voltage logic supply.

The module can be used in various ways. Maxim sells low-cost USB2PMB1#, USB2PMB2#, and USB2GPIO# adapter boards that use the Munich GUI software for communication through a USB cable. This is not included with this board. Alternatively, any microcontroller or FPGA with a 12-pin Pmod™-compatible connector can be used. Another option for the user is to wire-wrap a temporary connection from their system to the pins on connector X1. For these later two options the user needs to write their own control software.

The Pmod PCB dimension is just 42mm long x 20mm wide, with the width determined by the size of the X1 connector.

Applications

  • Current Sourcing Inputs
  • Individually Isolated Inputs
  • Industrial Automation
  • Motor Controls
  • Process Automation

MAX22191EVKIT

Evaluation Kit for the MAX22191

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MAX22191EVKIT

Evaluation Kit for the MAX22191

Evaluation Kit for the MAX22191

Features and Benefits

  • 24V and 48V Circuits for Easy Evaluation
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX22191 evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the functionality of the MAX22191 digital input in an optical isolator circuit. The EV kit features two circuits: one for a 24V digital input signal and one for a 48V input signal.

Applications

  • Building Automation
  • Industrial Automation
  • Process Automation
  • Programmable Logic Controllers

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