Austriamicrosystems unveils sensor interface

An Austriamicrosystems product story

Edited by the Electronicstalk editorial team Nov 19, 2009

Austriamicrosystems has expanded its interface product portfolio with the AS1716, a sensor designed for interfacing to Piezo Electronic capacitive sensors.

'Piezo Electronic sensors are self-generating and need no external excitation; they are also compact and have excellent linearity,' said Bruce Ulrich, marketing director consumer and communications at Austriamicrosystems.

'In automotive engine designs the knock sensor is an integral part of the engine management system, helping to increase overall reliability and improve fuel efficiency.

'The AS1716 provides the automotive customer with a complete, flexible, differential to single-ended solution,' he ended.

The AS1716 operates from a single supply (4.5V to 5.5V).

The device provides differential inputs, a first order low-pass filter to cut off the high-frequency noise components, differential to single-ended conversion, programmable gain stage and a two-pole, low-pass multiple feedback filter.

The AS1716 is an analogue front end specifically designed for unbiased capacitive sensors, interfacing with sample and hold input stages and analogue-to-digital converters.

The device has been EMC characterised by IEC 61967-4 (1ohm/150ohm Method), by IEC 62132-4 (direct power injection), is automotive qualified to AECQ100 for IC and PPAP level 3 and comes in an eight-pin SOIC package.