IC Integrated Circuits ADM3251EARWZ SOIC-20 Digital Isolators
IC Integrated Circuits ADM3251EARWZ SOIC-20 Digital Isolators
DESCRIPTION:
The ADM3251E1 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 isoPower™ integrated, isolated power. There is no requirement to use a separate isolated dc-to-dc converter. Chip-scale transformer iCoupler® technology from Analog Devices, Inc., is used both for the isolation of the logic signals as well as for the integrated dc-to-dc converter. The result is a total isolation solution. The ADM3251E contains isoPower technology that uses high frequency switching elements to transfer power through the transformer. 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 RS232 data links
Industrial/telecommunications diagnostic ports
Medical equipment
Parameter Table:
| Product Attribute | Attribute Value |
| Manufacturer: | Analog Devices Inc. |
| Product Category: | Digital Isolators |
| Series: | ADM3251E |
| Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-20 |
| Number of Channels: | 1 Channel |
| Polarity: | Unidirectional |
| Data Rate: | 460 kb/s |
| Isolation Voltage: | 2500 Vrms |
| Isolation Type: | Magnetic Coupling |
| Supply Voltage - Max: | 5.5 V |
| Supply Voltage - Min: | 4.5 V |
| Operating Supply Current: | 110 mA |
| Propagation Delay Time: | 190 ns |
| Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 85 C |
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Quality Warranty Period:12 Months.
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All products were tested before shipment, and the quality problems were negligible.
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