Capacitive Sensor Chip Configurable For Industrial Applications
February 4, 2010 by admin
Filed under Signal Conditioning
Austriamicrosystems has expanded its interface product portfolio with the AS1716, a sensor designed for interfacing to piezo electronic capacitive sensors.
It operates from a single 4,5 V to 5,5 V supply and 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 device is an analog front end specifically designed for unbiased capacitive sensors, interfacing with sample-and-hold input stages and analog digital converters. Although designed with automotive knock sensors in mind, the chip is also configurable for industrial sensor applications.
The device has been EMC characterised by IEC 61967-4 (1 Ω/150 Ω method) and IEC 62132-4 (direct power injection), is automotive qualified to AECQ100 for IC and PPAP level 3 and comes in an 8-pin SOIC package.
Motion Sensor Meets Tough Automotive Safety Requirements
November 6, 2009 by admin
Filed under Uncategorized
The latest dual die, 12-bit magnetic rotary encoder targets challenging applications
Austriamicrosystems today expanded its extensive magnetic rotary encoder portfolio with the AS5245, a fail-safe magnetic rotary encoder IC specifically designed to address stringent automotive requirements like reliability, accuracy and safety.
AS5245
Austriamicrosystems’ new AS5245 targets safety critical automotive applications such as pedals, transmission and steering wheels where a failure can be lethal and is completely unacceptable. The AS5245 motion sensing IC is based on austriamicrosystems’ industry leading expertise in proven stacked-die technology. This technology fulfills the requirement of true redundancy in safety applications. AS5245 covers the trend towards more active safety with built-in redundancy and on-chip diagnostic features.
Based on austriamicrosystems´ stacked-die technology, the AS5245 provides best phase matching capabilities. No additional temperature compensation, calibration or shielding against external magnetic stray fields is needed.
Customers benefit from the most cost optimized solution for safety critical systems.
To give system designers more flexibility during evaluation, the digital angle data of the AS5245 is provided either as a simple serial interface or as a PWM signal. In addition, an incremental quadrature output mode with an improved interpolation algorithm can be enabled and permanently programmed with a resolution of 10 or 12 bit.
The standard features of austriamicrosystems’ extensive encoder portfolio include user-specific zero programming, Chip-ID and diagnostic functions for the correct positioning of the magnet. An internal voltage regulator allows the AS5245 to operate at either 3.3 V or 5 V supply within a wide ambient temperature range of up to 150°C. The AS5245 is available in a lead-free QFN 32 package.
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