Product Details
●The ADM3251E is a high speed, 2.5 kV fully isolated, single- channel RS-232/V.28 transceiver device that operates from a single 5 V power supply. Due to the high ESD protection on the RIN and TOUT pins, the device is ideally suited for operation in electrically harsh environments or where RS-232 cables are frequently being plugged and unplugged.
●The ADM3251E incorporates dual-channel digital isolators with _iso_Power™ integrated, isolated power. There is no requirement to use a separate isolated dc-to-dc converter. Chip-scale transformer _i_Coupler® technology from Analog Devices, Inc., is used both for the isolation of the logic signals as well as for the inte- grated dc-to-dc converter. The result is a total isolation solution.
●The ADM3251E contains _iso_Power technology that uses high frequency switching elements to transfer power through thetransformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to Application Note AN-0971, _Control of Radiated Emissions with isoPower Devices_, for details on board layout considerations. The ADM3251E conforms to the EIA/TIA-232E and ITU-T V. 28 specifications and operates at data rates up to 460 kbps. Four external 0.1 μF charge pump capacitors are used for the voltage doubler/inverter, permitting operation from a single 5 V supply.
●The ADM3251E is available in a 20-lead, wide body SOIC package and is specified over the −40°C to +85°C temperature range.
●Applications
● High noise data communications
● Industrial communications
● General-purpose RS-232 data links
● Industrial/telecommunications diagnostic ports
● Medical equipment
●### Features and Benefits
● 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
●UL recognition
●2500 V rms for 1 minute per UL 1577
●VDE Certificate of Conformity (pending)
●DIN EN 60747-5-2 (VDE 0884 Teil 2): 2003-01
●CSA Component Acceptance Notice #5A (pending)
● Operating temperature range: −40°C to +85°C
● Wide body, 20-lead SOIC package
