Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Isolation | 2.5 kV power and data isolation |
| Data rate | Up to 460 kbps |
| Channels | 1 transmitter / 1 receiver |
| Supply | Single 5 V supply |
| ESD on RIN/TOUT | ±8 kV contact, ±15 kV air-gap |
| CMTI | >25 kV/µs |
| Package | 20-lead SOIC_W, RW-20 |
| Operating temperature | −40°C to +85°C |
Product Overview
ADM3251EARWZ is the base order code for the ADM3251E isolated single-channel RS-232 transceiver. It integrates the RS-232 interface, digital isolation, and isolated power conversion so the cable side can be galvanically separated from local logic from a single 5 V input supply.
Its 460 kbps rate, 2.5 kV isolation, and high RIN/TOUT ESD protection define the electrical selection. The absence of the -REEL suffix does not alter those limits but remains relevant to the exact procurement identity.
Key Features
- Single isolated RS-232 transmit and receive path.
- Integrated isoPower isolated dc-to-dc converter.
- 460 kbps EIA/TIA-232E operation.
- High ESD protection on RIN and TOUT.
Functional Highlights
Isolation of logic, isolated power generation, and RS-232 level translation are consolidated into one package.
Internal isolation-power switching means decoupling and emissions-aware PCB layout remain necessary even with a reduced external BOM.
Application Fit
- High-noise data communications.
- Industrial communications and diagnostic ports.
- General-purpose isolated RS-232 links.
Design Considerations
- Use the specified 0.1 µF charge-pump capacitors close to the device.
- Follow isoPower layout and emissions guidance.
- Check the 460 kbps limit against cable and timing requirements.
- Preserve ADM3251EARWZ as the exact BOM identity.
Product Status
Manufacturer status: PRODUCTION
Analog Devices currently lists ADM3251EARWZ as PRODUCTION.
Related Engineering Resources
Alternative Candidates for Engineering Evaluation
| MPN | Manufacturer | Package |
|---|---|---|
| ADM3251EARWZ-REEL | ADI | SOIC-20-300mil |
Candidate alternative parts require engineering verification before substitution. Electrical characteristics, pinout, package, qualification, and application requirements should be verified before use.
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the exact manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
