Sensor interface IC enables next-gen intelligent electrochemical sensors

Believed to be the only IC that incorporates potentiostat and electrochemical impedance spectroscopy (EIS) functionality on a single chip, the ADuCM355 has been released by Analog Devices.

The precision analogue microcontroller with bio-sensor and chemical sensor is designed for applications such as industrial gas sensing, instrumentation, vital signs monitoring and disease management. According to the company, it features the industry’s most advanced sensor diagnostics, best-in-class low noise and low power performance, and smallest form factor. Unlike traditional discrete solutions, it does not need multiple ICs to achieve similar performance, for increased reliability and cost savings.

It combines the high performance, low power, small form factor and feature set needed to enable next generation portable gas detectors and to set new benchmarks in reliable gas detection while minimising the cost of ownership, said Jacob Spector, global marketing manager, Portable Gas Detection for Honeywell Industrial Safety.

It has been used by PalmSens for mobile gas detection: “PalmSens is committed to make electrochemistry easier, more portable and more accessible,” said Niels van Velzen, CTO at PalmSens. “ADI’s ADuCM355 is at the heart of the new EmStat Pico, the world’s smallest general purpose electrochemical interface module. EmStat Pico is a hardware and software design platform that allows measurement in minutes and is ideal for the development of portable, wearable and space constrained sensor applications,” he added.

The ADuCM355 low power precision analogue microcontroller is based on the ARM Cortex M3 processor, with 26MHz core, 128kbyte Flash and 64kbyte SRAM. Designed to control and measure chemical and biosensors, it supports dual potentiostat (8.5-micro A, 1.6-microV RMS) and three or more sensor electrodes.  It has a flexible, 16-bit, 400ksamples per second measurement channel.

There are advanced sensor diagnostics and integrated analogue hardware accelerators, integrated into the 72-pin LGA package, measuring 6.0 x 5.0mm.•

The ADuCM355 is sampling now, with production quantities available.

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