ADUM1240

RECOMMENDED FOR NEW DESIGNS

Micropower, Dual-Channel Digital Isolators, Default High (2/0 Channel Directionality)

Data Sheet (Rev. C) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.79

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Overview

Ultralow power operation

3.3 V operation

5.6 µA per channel quiescent current, refresh enabled
0.3 µA per channel quiescent current, refresh disabled
148 µA/Mbps per channel typical dynamic current

2.5 V operation

3.1 µA per channel quiescent current, refresh enabled
0.1 µA per channel quiescent current, refresh disabled
116 µA/Mbps per channel typical dynamic current

Small, 20-lead SSOP package and small 8-lead SOIC package
Bidirectional communication
Up to 2 Mbps data rate nonreturn to zero (NRZ)
High temperature operation: 125°C
High common-mode transient immunity: >25 kV/µs

Safety and Regulatory Approvals
- R-8 [SOIC] package
- RS-20 [SSOP] package

The ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 are micropower, dual-channel digital isolators based on the Analog Devices, Inc., iCoupler^® technology. (Quad-channel products available). Combining high speed, complementary metal oxide semiconductor (CMOS) and monolithic air core transformer technologies, these isolation components provide outstanding performance characteristics superior to the alternatives, such as optocoupler devices.

The 20-lead SSOP version of the ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 allows control of the internal refresh functions. As shown in Figure 3, in standard operating mode, when EN_x = 0 (internal refresh enabled), the current per channel is less than 10 μA.

When EN_x = 1 (internal refresh disabled), the current per channel drops to less than 1 μA.

The ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 are packaged in either a 20-lead SSOP for 3.75 kV reinforced isolation or an 8-lead SOIC for 3 kV basic isolation. The devices meet regulatory requirements, such as UL and CSA standards.

In addition to the space saving package options, the ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 operate with supplies as low as 2.25 V. All models provide low, pulse width distortion at <8 ns. In addition, every model has an input glitch filter to protect against extraneous noise disturbances.&

Product Highlights

Outstanding Power Performance.
These 3 kV digital isolators operate with 2.5 V supplies.
Distortion and Noise Protection.
Low pulse width distortion (< 8 ns for A grade models) and an input glitch filter for extraneous noise disturbance protection.

Applications

General-purpose, low power, multichannel isolation
1 MHz low power SPI
4 mA to 20 mA loop process control

Part Models: 4
1ku List Price: Starting From $1.79

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADUM1240ARSZ	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADUM1240ARSZ-RL7	20-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADUM1240ARZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADUM1240ARZ-RL7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 29, 2025 - 25_0067 Update Data Sheet Regulatory Information for Select Data Isolator Products
		PCN25_0067_Form Material_Report Datasheet Specification Comparison
ADUM1240ARSZ	PRODUCTION
ADUM1240ARSZ-RL7	PRODUCTION
ADUM1240ARZ	PRODUCTION
ADUM1240ARZ-RL7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

ADUM1240 IBIS Models 2

Evaluation Kits

ADuM124x Evaluation Board

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Product Details

The EVAL-ADuM1241EBZ supports the ADuM1240ARSZ, ADuM1241ARSZ, ADuM1245ARSZ, and ADuM1246ARSZ, which are ultralow power, 2-channel iCoupler^® isolators. The evaluation board provides a JEDEC standard 20-lead SSOP pad layout, support for signal distribution, loopback, and loads referenced to V_DDx or GNDx, as well as optimal by pass capacitance. Signal sources can be wired onto the board as well as brought on to the board through edge-mounted SMA connectors (sold separately) or terminal blocks for power connections. The board includes 200mil header positions for compatibility with Tektronix active probes.

The board follows best printed circuit board (PCB) design practices for 4-layer boards, including a full power and ground plane on each side of the isolation barrier. No other EMI or noise mitigation design features are included on this board. In cases of very high speed operation or when ultralow emissions are required, refer to the AN-1109 application note for additional board layout techniques.

Resources

UG-663: Evaluating the iCoupler ADuM1240ARSZ/ADuM1241ARSZ/ADuM1245ARSZ/ADuM1246ARSZ with the EVAL-ADuM1241EBZ Evaluation System
4/1/2014

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ADUM1240

Overview

Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Safety and Regulatory Compliance 1

Video 1

Solutions Bulletin & Brochure 1