Product Overview
The AS5055A is a low-voltage, low-power, 12-bit magnetic rotary position sensor designed for precise and reliable absolute angle measurement. It integrates a Hall element array, a high-resolution ADC, and a smart power management controller. The sensor communicates angle position, alarm bits, and magnetic field information via a 3-wire or 4-wire SPI interface. Its compact QFN 16-pin package and wide operating temperature range make it ideal for small, compact, and battery-operated designs, including servo motor control and robotics. The AS5055A offers immunity to external magnetic stray fields and an interrupt pin to signal data availability.
Product Attributes
- Brand: ams
- Package: QFN 16-pin 4x4x0.85 mm
- Operating Temperature: -40C to 85C
Technical Specifications
| Parameter | Conditions | Min | Typ | Max | Units | Description |
| VDD | DC supply voltage | 3.0 | 3.6 | V | Analog and digital power supply | |
| VDDp | Peripheral supply voltage | 1.8 | VDD | V | Peripheral power supply | |
| Tamb | Ambient operating temperature | -40 | 85 | C | ||
| ION | Current consumption | 8.5 | mA | Normal operating mode | ||
| IOFF | Current consumption | 33 | A | Low power mode with activated POR (POR_OFF = 0x00) - default setting | ||
| IOFF | Current consumption | 3 | A | Low power mode with deactivated POR (POR_OFF = 0x5A) | ||
| treadout | Readout rate (Time between READ ANGLE command and INTERRUPT) | 500 | s | |||
| tPwrUp | Power up time (Minimum time after power up before the sensor is operational) | 580 | s | |||
| Rd | Lateral displacement range (Misalignment of the center of the magnet to the center of the die) | 0.5 | mm | |||
| BZ | Magnetic input field | 30 | 90 | mT | ||
| BZ00 | Magnetic input field range (Gain = 00) | 58 | 90 | mT | ||
| BZ01 | Magnetic input field range (Gain = 01) | 51 | 80 | mT | ||
| BZ10 | Magnetic input field range (Gain = 10) | 39 | 62 | mT | ||
| BZ11 | Magnetic input field range (Gain = 11) | 30 | 47 | mT | ||
| N00 | Noise (rms) (Within Bz00 magnetic input field range and Gain = 00) | 0.128 | degr ms | |||
| N01 | Noise (rms) (Within Bz01 magnetic input field range and Gain = 01) | 0.149 | degr ms | |||
| N10 | Noise (rms) (Within Bz10 magnetic input field range and Gain = 10) | 0.192 | degr ms | |||
| N11 | Noise (rms) (Within Bz11 magnetic input field range and Gain = 11) | 0.256 | degr ms | |||
| INL | Integral Non Linearity (Using Bomatec 6x2.5 mm NdFeB magnet with a maximum x/y-displacement radius of 250 m from package center) | -1.41 | 1.41 | deg | ||
| VIH | High level input voltage | 0.7 * VDDp | V | Digital pads: MISO, MOSI, SCK, SS/, EN_INT/, INT/, WM | ||
| VIL | Low level input voltage (VDDp > 2.7V) | 0.3 * VDDp | V | Digital pads: MISO, MOSI, SCK, SS/, EN_INT/, INT/, WM | ||
| VIL | Low level input voltage (VDDp < 2.7V) | 0.25 * VDDp | V | Digital pads: MISO, MOSI, SCK, SS/, EN_INT/, INT/, WM | ||
| ILEAK | Input leakage current | 1 | A | Digital pads: MISO, MOSI, SCK, SS/, EN_INT/, INT/, WM | ||
| VOH | High level output voltage | VDDp - 0.5 | V | Digital pads: MISO, MOSI, SCK, SS/, EN_INT/, INT/, WM | ||
| VOL | Low level output voltage | VSS + 0.4 | V | Digital pads: MISO, MOSI, SCK, SS/, EN_INT/, INT/, WM | ||
| CL | Capacitive load | 35 | pF | Digital pads: MISO, MOSI, SCK, SS/, EN_INT/, INT/, WM |
2411192313_AMS-AS5055A-BQFM_C2655177.pdf
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