ADuM144x Low-Power Digital Isolators


Micropower quad-channel digital isolators from Analog Devices

Analog Devices has introduced the ADuM144x family, the industry's lowest-power digital isolators. Based on ADI's proprietary iCoupler technology, the ADuM144x can be powered by as little as 1 μW of power, delivering power levels over 1,000 times lower than optocouplers and competing digital isolators. At these levels, the ADuM144x family is ideally suited for industrial and instrumentation systems such as 4-20 mA current loops, remote sensors, and green systems that demand high energy efficiency or depend on limited power sources, such as batteries.

The ADuM144x are quad-channel data isolators available in three different channel configurations with a one-minute isolation safety rating of 2.5 kV rms. They have an operating voltage range of 2.25 V to 3.6 V, further reducing power constraints and providing the lowest isolator operating voltage on the market. Quiescent power supply current at 2.5 V is less than 5 μA per channel, and power supply current at 2 Mbps is less than 380 μA per channel. A power saving mode can reduce current levels to as little as 0.1 μA per channel, resulting in an industry-best 1 μW of total power for the entire isolator. In addition to the significant power savings, the ADuM144x is also available in a 16-lead QSOP package, making it the industry’s smallest quad-channel digital isolators with a 2.5 kV rms isolation rating.

ADuM144x Low-Power Digital Isolators

Manufacturer Part Number Description Available Quantity Datasheets
ADUM1440ARQZ DGTL ISO 2.5KV GEN PURP 16QSOP 97
ADUM1441ARQZ DGTL ISO 2.5KV GEN PURP 16QSOP 489
ADUM1442ARQZ DGTL ISO 2.5KV GEN PURP 16QSOP 238
ADUM1445ARQZ DGTL ISO 2.5KV GEN PURP 16QSOP 0
ADUM1446ARQZ DGTL ISO 2.5KV GEN PURP 16QSOP 181
ADUM1447ARQZ DGTL ISO 2.5KV GEN PURP 16QSOP 111

Evaluation Board

Manufacturer Part Number Description Available Quantity Datasheets
EVAL-ADUM1441EBZ BOARD EVAL FOR ADUM144X 16QSOP 4