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ams 3.5mm jack interface lets smart active noise cancellation (ANC) headsets run battery-free


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 ams 3.5mm jack interface smart active noise cancellation (ANC) headsets

First-to-market Accessory Communication Interface (ACI) enables small form factor noise cancellation headsets while offering the flexibility to include sensors, LEDs and displays

ams AG (SIX: AMS), a leading provider of high performance sensor solutions, announced the launch of a technology which enables noisecancelling headsets with a four-pole 3.5mm jack to operate for the first time without a dedicated battery power supply.

The new Accessory Communications Interface (ACI) invented by ams uses the microphone (MIC) wire – one of four wires in a standard 3.5mm audio cable – to carry power and bidirectional data with a rate of up to 16 Mbit/sec, as well as digital audio signals. By implementing the ams ACI solution and eliminating the headset’s battery, manufacturers can significantly reduce the size, weight and bill-of-materials cost of their connected accessory using the popular and mechanical very robust 3.5mm connector.

The new capabilities provided by ams’ ACI make the familiar 3.5mm connector even more useful than before. An ACI equipped ANC headset performs Receive (Rx) noise cancellation and enables Transmit (Tx) noise cancellation on voice calls which increases audio quality significantly. The device can use headset-mounted sensors to add features including gesture recognition, proximity sensing, heart-rate measurement, temperature sensing and others. Moreover, a display or special light effects can be added to the headset providing innovative opportunities for differentiation.

The ams 3.5mm audio solution consumes 60% less power than USB Type-C systems, keeping the drain on the handset’s battery to a minimum. The ACI system also requires fewer components than a USB Type-C system and therefore keeps system costs low, enabling manufacturers to afford to bundle an ANC headset with a mobile phone. In addition, the system is compatible with legacy headsets that do not have ACI technology.

By freeing noise-cancelling 3.5mm headsets of their dedicated battery, ams’ new ACI gives OEMs the opportunity to completely rethink their product designs. “Not only can OEMs make headsets smaller, lighter and more convenient, but with the addition of sensors, LEDs or displays they can add a variety of features which helps them differentiate their products”, said Christian Feierl, Marketing Manager at ams.

The system is available for sampling now. For more technical information and sample requests, please go to

About ams

ams is a global leader in the design and manufacture of advanced sensor solutions. Our mission is to shape the world with sensor solutions by providing a seamless interface between humans and technology. ams’ highperformance sensor solutions drive applications requiring small form factor, low power, highest sensitivity and multi-sensor integration. Products include sensor solutions, sensor ICs, interfaces and related software for consumer, communications, industrial, medical, and automotive markets.

With headquarters in Austria, ams employs over 3,300 people globally and serves more than 8,000 customers worldwide. ams is listed on the SIX Swiss stock exchange (ticker symbol: AMS). More information about ams can be found at


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