Analog Devices Inc. ADM3251EARWZ - IC supplier, IC distributor, Semicon electronics

Mfr	Analog Devices Inc.
Type	RS-232 Interface IC
Number of Drivers/Receivers	1 Driver/1 Receiver
Isolation Voltage	2.5 kV rms
Data Rate	460 kbps
Supply Voltage (Min)	3 V
Supply Voltage (Max)	5.5 V
ESD Protection	±15 kV Human Body Model (HBM)
Package/Sizes	20-SOIC
Operating Temperature	-40°C to +85°C
Mounting Style	Surface Mount
RoHS Compliance	Yes

ADM3251EARWZ 2.5 kV rms Signal Isolated RS-232 Line Driver/Receiver Introduction

The ADM3251EARWZ is a high-performance, isolated single-channel RS-232 line driver/receiver designed by Analog Devices. It features a 2.5 kV fully isolated (power and data) RS-232 transceiver with an integrated isoPower™ isolated DC-to-DC converter, providing reliable communication in electrically harsh environments. This device supports a data rate of up to 460 kbps and meets the EIA/TIA-232E specifications, ensuring compatibility with standard RS-232 interfaces. It is housed in a 20-lead wide body SOIC package and operates over a temperature range of -40°C to +85°C.

ADM3251EARWZ Isolated RS-232 Transceiver Chip Features

The ADM3251EARWZ offers several key features that enhance its performance and reliability. It provides robust isolation with a 2.5 kV insulation barrier between the primary and secondary sides, protecting against high-voltage surges and noise. The integrated isoPower technology eliminates the need for an external isolated DC-to-DC converter, simplifying design and reducing component count. Additionally, it features ±8 kV contact discharge and ±15 kV air gap discharge ESD protection on the RIN and TOUT pins, ensuring high reliability in harsh environments. The device also boasts high common-mode transient immunity (>25 kV/μs) and requires only four 0.1 μF charge pump capacitors for operation.

ADM3251EARWZ Applications

The ADM3251EARWZ is widely used in applications where reliable RS-232 communication is required in noisy or high-voltage environments. These include industrial automation systems, where it protects control systems from voltage spikes and noise, ensuring stable data transmission. It is also used in general-purpose RS-232 data links, industrial communication systems, medical devices, and diagnostic ports in industrial and telecommunications equipment. Its ability to withstand harsh conditions makes it ideal for applications with frequent RS-232 cable plug/unplug operations.

ADM3251EARWZ Advantages

The ADM3251EARWZ provides several advantages over traditional RS-232 transceivers. Its integrated isolation and DC-to-DC converter reduce the need for external components, lowering overall system cost and complexity. The high isolation voltage and ESD protection ensure reliable operation in electrically noisy environments, while the wide operating temperature range (-40°C to +85°C) makes it suitable for industrial and outdoor applications. Additionally, its fast data rate (up to 460 kbps) and low propagation delay support high-speed communication.

Alternative IC Models
- ADM3251E: A non-reel version of the ADM3251EARWZ with the same features and specifications.
- ADM3251EARWZ-REEL: A reel version of the chip, suitable for automated assembly processes.
- ADM3251E-REEL7: Another reel variant, offering the same functionality but in a different packaging format.