Overview
The ADM3251E, produced by Analog Devices Inc., is a high-speed, 2.5 kV fully isolated, single-channel RS-232/V.28 transceiver device. It operates from a single 5 V power supply and is designed to provide robust performance in electrically harsh environments. The device incorporates isoPower™ integrated, isolated power and uses chip-scale transformer iCoupler® technology for both logic signal isolation and the integrated dc-to-dc converter. This ensures a total isolation solution, making it ideal for applications requiring high reliability and safety standards.
Key Specifications
| Parameter | Value |
|---|---|
| Isolation Voltage | 2.5 kV |
| Data Rate | Up to 460 kbps |
| Power Supply | Single 5 V |
| ESD Protection | ±8 kV: contact discharge, ±15 kV: air gap discharge |
| Operating Temperature | −40°C to +85°C |
| Package Type | 20-lead, wide body SOIC |
| Safety and Regulatory Approvals | UL recognition 2500 V rms for 1 minute per UL 1577, VDE Certificate of Conformity DIN EN 60747-5-2 (VDE 0884 Teil 2): 2003-01, CSA Component Acceptance Notice #5A |
Key Features
- 2.5 kV fully isolated (power and data)
- isoPower integrated, isolated dc-to-dc converter
- Meets EIA/TIA-232E and ITU-T V.28 specifications
- High common-mode transient immunity: >25 kV/μs
- ESD protection on RIN and TOUT pins
- Four external 0.1 μF charge pump capacitors for voltage doubler/inverter
- Internal 5 kΩ pull-down resistor on the RS-232 input
Applications
- High noise data communications
- Industrial communications
- General-purpose RS-232 data links
- Industrial/telecommunications diagnostic ports
- Medical equipment
Q & A
- What is the isolation voltage of the ADM3251E?
The ADM3251E has a 2.5 kV isolation voltage. - What is the maximum data rate supported by the ADM3251E?
The ADM3251E supports data rates up to 460 kbps. - What type of power supply does the ADM3251E require?
The ADM3251E operates from a single 5 V power supply. - What level of ESD protection does the ADM3251E offer?
The ADM3251E offers ±8 kV: contact discharge and ±15 kV: air gap discharge ESD protection. - What is the operating temperature range of the ADM3251E?
The operating temperature range is −40°C to +85°C. - What type of package is the ADM3251E available in?
The ADM3251E is available in a 20-lead, wide body SOIC package. - Does the ADM3251E meet any safety and regulatory standards?
Yes, it has UL recognition 2500 V rms for 1 minute per UL 1577, VDE Certificate of Conformity DIN EN 60747-5-2 (VDE 0884 Teil 2): 2003-01, and CSA Component Acceptance Notice #5A. - What are the key applications of the ADM3251E?
The key applications include high noise data communications, industrial communications, general-purpose RS-232 data links, industrial/telecommunications diagnostic ports, and medical equipment. - How does the ADM3251E achieve isolation?
The ADM3251E uses chip-scale transformer iCoupler® technology for both logic signal isolation and the integrated dc-to-dc converter. - What is the purpose of the charge pump capacitors in the ADM3251E?
The charge pump capacitors are used for the voltage doubler/inverter to generate the required ±10 V supply from the 5 V input.
