Defibrillation/ESD Protector For Medical Devices

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To protect medical equipment such as defibrillators and ECG monitors against defibrillation pulses and electrostatic discharge (ESD), Maxim Integrated has unveiled MAX30034, a tiny 3 x 5mm device which is claimed to replace existing multilevel protection circuitry and provides > 75% space savings.

The device can withstand over 100,000 defibrillation pulses without failure and still maintain a leakage current under 10pA (100x less than GDT/TVS-based approaches), according to the firm.

The ECG input amplifiers in defibrillators and ECG monitors must withstand high-voltage pulses for cardiac resuscitation. These pulses can easily damage the sensitive electronic circuitry which captures the millivolt level heart signals.

The firm emphasises that preventing this damage has required multiple components including a per-channel gas-discharge tube (GDT) and/or transient-voltage suppression (TVS) device, as well as ESD-protection diodes. Further, leakage current is relatively high, at about 1-2nA.

Offered in a small 3mm x 5mm µMAX package, the MAX30034 is designed to replace these conventional solutions. Further, the device can withstand over 100,000 defibrillation pulses without failure and still maintain a leakage current under 10pA (100x less than GDT/TVS-based approaches), the firm says.

“Customers need innovative, tightly focused components like this,” said Andrew Baker, Executive Director for Industrial and Healthcare at Maxim Integrated. “It completely changes the component solution to the long-standing challenge of protecting the medical device against a defibrillation pulse.”

The device is specified for 0 to 70°C operating temperature range.

The MAX30034 is priced at $3.40 (1000-up, FOB USA). An evaluation kit, the MAX30034EVKIT#, is available for $25.

For further details, click here.

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