2.5 kV fully isolated (power and data) RS-232 transceiver
isoPower integrated, isolated dc-to-dc converter
460 kbps data rate
1 Tx and 1 Rx
Meets EIA/TIA-232E specifications
ESD protection on RIN and TOUT pins
±8 kV: contact discharge
±15 kV: air gap discharge
0.1 μF charge pump capacitors
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals (pending)
2500 V rms for 1 minute per UL 1577
VDE Certificate of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12VIORM = 560 V peak
Operating temperature range: −40°C to +85°C
Wide body, 20-lead SOIC package
High noise data communications
General-purpose RS-232 data links
Industrial/telecommunications diagnostic ports
The ADM3251E is a high speed, 2.5 kV fully isolated, singlechannelRS-232/V.28 transceiver device that operates from asingle 5 V power supply. Due to the high ESD protection on theRIN and TOUT pins, the device is ideally suited for operation inelectrically harsh environments or where RS-232 cables arefrequently being plugged and unplugged.
The ADM3251E incorporates dual-channel digital isolators withisoPower™ integrated, isolated power. There is no requirementto use a separate isolated dc-to-dc converter.
Chip-scale transformeriCoupler® technology from Analog Devices, Inc., is usedboth for the isolation of the logic signals as well as for theintegrated dc-to-dc converter. The result is a total isolation solution.
The ADM3251E conforms to the EIA/TIA-232E and ITU-T V. 28specifications and operates at data rates up to 460 kbps.Four external 0.1 μF charge pump capacitors are used for thevoltage doubler/inverter, permitting operation from a single5 V supply.
The ADM3251E is available in a 20-lead, wide body SOIC packageand is specified over the −40°C to +85°C temperature range.
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