ams releases 517x sensor series with ISO26262 safety compliance |

ams releases 517x sensor series with ISO26262 safety compliance

26 April, 2016 -- ams AG, a provider of high performance sensors and analog ICs, released magnetic position sensors fully developed using the automotive industry’s program for ISO26262 safety compliance. The launch of the AS517x sensor series also includes the introduction of ams’ first magnetic position sensor in a System-in-Package (SiP) format.

The AS5170 and AS5171 sensors were developed as SEooC (Safety Element out of Context) devices, as defined in the ISO26262 functional safety standard. The AS517x parts are ams’ first magnetic position sensors to provide full data path diagnostics, enabling automotive system OEMs to achieve a higher level of ISO26262 system-level compliance.

The diagnostic system built into the AS517x series tests the entire device, from the Hall sensor front end, through the DSP engine which converts raw measurements of magnetic field strength into sine and cosine vectors, to the back-end interfaces and pins.

The AS517x series of sensors, which are qualified to AEC-Q100 Grade 0 measure the absolute angle of rotation. Their high 12-bit output resolution enables precise measurements, even for reduced angular excursions down to a minimum arc of 90°. This means, that the ams devices are ideal for a range of safety-critical automotive applications including chassis height, gear shifters, electronic power steering, exhaust gas recirculation, and brake pedal as well as throttle position sensing.

The AS5171 comes in an SiP format, which integrates the sensor die and capacitors in a single, encapsulated three-pin package. The SiP offers improved ESD and EMC performance, as well as enhanced supply protection. The Supply and Output pins are protected against over-voltages up to +20V. The Supply pin also offers -20V of protection against reverse polarity.

The AS5171A provides an analog output, and the AS5171B provides a digital output, which may be programmed either as a PWM interface or as a SENT-compliant interface. The analog AS5170A and digital AS5170B ICs are housed in an 8-pin SOIC package.

The AS5170 and AS5171 benefit from stray magnetic field immunity, enabling unimpaired operation even in the presence of strong magnetic fields generated by electric motors, high current-carrying cables and other external devices.

The high sensitivity of the Hall sensor front-end in the AS517x devices enables the use of small, low cost target magnets and supports a wide magnetic field strength input range of 5-90mT.