Analog Devices / Maxim Integrated MAX22191 Digital Isolator
Analog Devices Inc. MAX22191 Digital Isolator is an IEC 61131-2 compliant industrial Digital Input (DI) device that converts a 24V digital input to a 2.4mA current. This digital isolator drives the current for the optical isolators. The voltage thresholds and current levels in MAX22191 comply with Type 1 and Type 3 inputs that minimize power dissipation. This isolator is parasitically powered as the operating power is derived from the input signal eliminating the need for any external field-side power supply. ADI MAX22191 isolator consists of a CMOS-compatible test input for safety diagnostics. This digital isolator acquires robust functionality and integrated thermal shutdown.
ADI MAX22191 features 250ns (max) fast response time, reduced heat dissipation, limited current input, and high integration for flexible circuit designs. This isolator is available in a small 6-lead SOT-23 package and operates at -40°C to 125°C ambient temperature range. The MAX22191 isolator applications include industrial automation, process automation, motor controls, individually isolated inputs, and current sourcing inputs.
Features
- High integration for flexible circuit designs
- 250ns (max) response time
- Parasitically powered from the field input
- Current sourcing input with optical isolators
- Current sinking input with optical isolators
- Current sinking input with logic devices
- Test pulse input
- Reduced power and heat dissipation
- A current limited input
- Robust design
- -60V to 60V input voltage
- -40°C to 125°C ambient operating temperature
Applications
- Process automation
- Industrial automation
- Motor controls
- Individually isolated inputs
- Current sourcing inputs
Videos
Block Diagram
Related Development Tool
Analog Devices / Maxim Integrated MAX22191EVKIT Evaluation Kit
Fully assembled and tested board with two circuits to evaluate MAX22191 digital isolator.
Published: 2018-06-12
| Updated: 2023-04-12