AMS AS5171A HSIT magnetic sensor with ISO26262 SEooC certification and simple two pole magnet operation
Product Overview
The AS5171 is a high-resolution on-axis magnetic angular position sensor designed for precise absolute angle measurement. It utilizes Hall sensor technology to measure the orthogonal component of magnetic flux density, compensating for stray fields with a robust 14-bit sensor array and analog front-end. Available with analog (AS5171E) or programmable digital (AS5171B) output interfaces (PWM or SENT-compliant), it requires only a simple two-pole magnet for operation. The device offers robust protection against overvoltage and reverse polarity, operating at a 5V supply. Its System-in-Package (SIP) design integrates the sensor and decoupling capacitors, eliminating the need for external components and PCBs, thereby reducing system costs. The AS5171 is defined as a Safety Element out of Context (SEooC) according to ISO26262.
Product Attributes
- Brand: ams OSRAM
- Certifications: AEC-Q100 Grade 0 qualified, ISO26262 (SEooC)
Technical Specifications
| Parameter | AS5171E | AS5171B | Units | Conditions |
|---|---|---|---|---|
| Output Interface | Analog | PWM or SENT-compliant | - | - |
| Resolution | 14-bit (Core), 12-bit (Analog, min @90) | 14-bit (Core), 12-bit (Digital) | bit | - |
| Integral Non-Linearity (INL) | -0.5 to 0.5 (optimum, 25C, full turn) | deg | Best aligned reference magnet(1) at 25C over full turn 360 | |
| Integral Non-Linearity (INL) | -0.9 to 0.9 (optimum, over temperature) | deg | Best aligned reference magnet(1) over temperature -40C to 150C over full turn 360 | |
| Integral Non-Linearity (INL) | -1.4 to 1.4 (over temperature and displacement) | deg | Best aligned reference magnet(1) over temperature -40C to 150C over full turn 360 and displacement | |
| Output Noise (peak to peak) | 1 LSB | LSB | Static conditions - filter on | |
| Supply Voltage (VDD) | 4.5 to 5.5 | V | Operating | |
| Regulated Voltage (VDD3V3) | 3.3 to 3.45 | V | - | |
| Supply Current (IDD_A) | 4 to 12 | - | mA | AS5171E, AGC=255, no magnet, no output load, no short circuit |
| Supply Current (IDD_B) | - | 4 to 10 | mA | AS5171B, AGC=255, no magnet, no output load, no short circuit |
| Start-up Time (TSUP) | 10 | ms | Functional mode | |
| Operating Temperature Range | -40 to 150 | C | Ambient temperature | |
| Storage Temperature Range | -55 to 150 | C | - | |
| Magnetic Field Strength (Bz) | 30 to 70 | mT | Required orthogonal component, MFER = 0 | |
| Magnetic Field Strength (BzE) | 10 to 90 | mT | Required orthogonal component, MFER = 1 | |
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