Part Number: ADM3251EARWZ-REEL

Manufacturer: Analog Devices, Inc.

Description: DGTL ISO 2500VRMS RS232 20SOIC

Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of ADM3251EARWZ-REEL

Datasheet  ADM3251EARWZ-REEL datasheet
Category Isolators
Family Digital Isolators
Manufacturer Analog Devices Inc.
Series IsoPower?, iCoupler?
Packaging Tape & Reel (TR)
Part Status Active
Technology Magnetic Coupling
Type RS232
Isolated Power Yes
Number of Channels 2
Inputs – Side 1/Side 2 1/1
Channel Type Unidirectional
Voltage – Isolation 2500Vrms
Common Mode Transient Immunity (Min) 25kV/μs
Data Rate 460Kbps
Propagation Delay tpLH / tpHL (Max)
Pulse Width Distortion (Max)
Rise / Fall Time (Typ) 2.3ns, 2.3ns
Voltage – Supply 4.5 V ~ 5.5 V
Operating Temperature -40°C ~ 85°C
Package / Case 20-SOIC (0.295″, 7.50mm Width)
Supplier Device Package 20-SOIC


The ADM3251EARWZ-REEL is a high-speed, fully isolated, single-channel RS-232/V.28 transceiver intended to work in difficult electrical environments or situations where RS-232 cables are often plugged in and out. With a single 5 V power source and built-in isolation technology, this device offers strong ESD protection and a variety of features that make it a versatile solution for many applications.

Overview of ADM3251EARWZ-REEL

The ADM3251EARWZ-REEL is an advanced single-channel transceiver with integrated isolated power, designed for high-speed communication in challenging environments. It features dual-channel digital isolators and eliminates the need for a separate DC-to-DC converter. The device uses Analog Devices’ iCoupler® technology for reliable isolation and a simplified design. With isoPowerTM technology, it efficiently manages power without an additional converter. The transceiver adheres to industry standards, handles data rates up to 460 kbps, and operates from a single 5 V power source. Its wide temperature range (-40°C to +85°C) and 20-lead SOIC package offer versatility. For PCB design and emissions control, refer to Application Note AN-0971. This transceiver is a robust choice for high-speed communication in demanding applications.

● ESD Protection and Isolation

Electrostatic Discharge (ESD) safety is especially good on the RIN and TOUT pins of the ADM3251EARWZ-REEL. This advanced feature protects against ESD damage and ensures top performance in electrically harsh settings, such as those with a lot of cable connections. You can count on the ADM3251EARWZ-REEL to work reliably and consistently, even when there are problems with the electricity. This makes it a great choice for ESD-sensitive uses.

● High-Speed and Reliable Communication

The ADM3251EARWZ-REEL is fast because its predecessor was also fast. With data rates of up to 460 kbps and compliance with EIA/TIA-232E and ITU-T V.28 standards, this transceiver makes sure that transmission is smooth and reliable in a variety of situations.

● Robust Isolation

The strong separation that the ADM3251EARWZ-REEL provides is one of its best features. With 2.5 kV channels that are fully isolated from each other, this device offers great safety in places with a lot of electricity. The built-in dual-channel digital isolators not only keep signals from getting messed up, but they also provide a different source of power, so you don’t need a separate dc-to-dc converter.

● IsoPower™ Technology

The innovative isoPowerTM technology in the ADM3251EARWZ-REEL uses high-frequency switching elements to move power through the built-in generator. This integration makes the design simpler by getting rid of the need for a separate DC-to-DC converter. This makes the design more efficient and reduces the number of parts.

● Chip-Scale Transformer iCoupler® Technology

The isolation and power solutions of the ADM3251EARWZ-REEL are based on the advanced chip-scale transformer iCoupler® technology from Analog Devices, Inc. This technology not only keeps logic data separate, but it also has a dc-to-dc converter built in. As a result, there is a complete solution for isolating the system, which improves performance and reliability.

● Power Efficiency and Supply Flexibility:

The ADM3251EARWZ-REEL has a clever voltage doubler/inverter system that, along with the strategic use of external 0.1 F charge pump capacitors, makes it possible to run the device smoothly from a single 5 V source. The ADM3251EARWZ-REEL is a technical marvel in the world of transceiver devices because of its innovative design. Not only does it improve supply flexibility, but it also saves a lot of power.

● System for Voltage Doubler/Inverter

At the heart of this setup is a voltage doubler, which is a circuit that doubles the power coming in. The ADM3251EARWZ-REEL takes advantage of this idea, so it can run on a single 5 V source. By cleverly turning this 5 V power source into a higher voltage level, the gadget can do more without needing more power sources.

Also, the inverter makes sure that this high power can be used both as a positive and a negative supply. This symmetrical way of doing things is important for the transceiver to work right, especially when sending and receiving RS-232 or V.28 signals.

● External 0.1 F Charge Pump Capacitors

The voltage doubler/inverter system is fine-tuned with the help of these external capacitors. The ADM3251EARWZ-REEL doubles the voltage by carefully placing 0.1-F charge pump capacitors. This makes the process stable, reliable, and more efficient. These capacitors store energy and make it easier for the input voltage to be changed to the amount needed for the transceiver to work.

● Improved Power Efficiency

The use of external charge pump capacitors and the voltage doubler/inverter system work together to make a big difference in power efficiency. The ADM3251EARWZ-REEL makes sure that the device works well and uses as little power as possible by managing the energy conversion process effectively.

This improved power efficiency is very helpful, especially in designs that try to save energy and in battery-powered apps. It not only makes the battery last longer, but it also uses less power overall. This makes the ADM3251EARWZ-REEL a good choice for situations where the power economy is very important.

In short, the voltage doubler/inverter system and the strategic use of external 0.1 F charge pump capacitors make it possible for the ADM3251EARWZ-REEL to work smoothly from a single 5 V source, which makes it much more energy efficient. This smart design strikes a balance between performance and energy use, making the transceiver a top choice for projects where freedom and efficiency are key.

● Temperature Range and Packaging

The ADM3251EARWZ-REEL is made to work successfully in a wide range of temperatures, from -40°C to +85°C. It comes in a 20-lead, wide-body SOIC package, which makes it easy to build and use in different applications.

● PCB Layout and Emissions Standards

Due to the device’s advanced technology and integration of isoPowerTM, the PCB layout must be done with extra care to meet emissions standards. Application Note AN-0971, “Control of Radiated Emissions with IsoPower Devices,” gives engineers more information about how to lay out a board.


In conclusion, the ADM3251EARWZ-REEL is the pinnacle of high-performance, isolated RS-232/V.28 transceivers. With robust ESD protection, simplified power management, and cutting-edge tech integration, it’s the ultimate choice for dependable high-speed communication and isolation. Follow our guide to unlocking the ADM3251EARWZ-REEL’s full potential in your designs for top-tier performance and reliability. Secure yours through ICRFQ, the premier Chinese supplier of electronic components, and elevate your projects today.

4.8/5 - (397 votes)
Kevin Chen