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A/D converter changes sensor signals

Bodenheim, Germany — IC-Haus GmbH unveiled a 13-bit monolithic analog-to-digital converter, which by applying a count-safe vector follower principle, converts sine and cosine sensor signals with a selectable resolution and hysteresis into angle position data.

This absolute value is output via a high-speed synchronous-serial BiSS interface and trails a master clock rate of up to 10 Mbits/s, or, alternatively, can be set so that it is compatible with SSI . A 24-bit period counter, which can be read using BiSS multicycle data (MCD) supplements the position data with a multiturn count.

An output is only performed for A/B quadrature signals that can be reliably counted and processed by the subsequent system. This is guaranteed by patented signal processing for glitch-free digital signals with hysteresis, which always keep a pre-selectable minimum spacing between the signal edges. Matching the application and the environmental noise conditions, input interferences are filtered without increasing the signal transmission delay. The incremental encoder signals are supplemented with a generated zero signal if the release is enabled at the zero input.

Being the first BiSS slave on the market, the IC-NQ provides absolute position data with 24-bit multiturn count within a few microseconds, according to the company.

Applications include optical rotary encoders, magnetic rotary encoders, linear displacement measurement, motor commutation, built-in sensors for DC motors, and automotive (electronic power assisted steering, wheel sensor technology, and pedal evaluation).

With a single side +5V supply the component operates in the industrial operating temperature range of -20°C to +85°C. For automobile applications a component qualification test can be performed according to the requirements. The converter chip is already designed for operating temperatures from -40°C to +125°C.

The product is available now in a TSSOP20 package and is priced at $9.60 in 1,000-piece quantities. Click here for the IC-NQ data sheet.

IC-Haus , 1-630-357-7275, www.ICHaus.de.

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