Product Overview
The AS5048 is an easy-to-use 14-bit high-resolution magnetic rotary encoder that measures the absolute position of a magnet's rotation angle. It integrates Hall sensors, an analog-to-digital converter, and digital signal processing to provide absolute position information accessible via PWM, SPI (AS5048A), or IC (AS5048B) interfaces. The zero position is programmable, simplifying assembly and eliminating the need for mechanical alignment. Its robustness against misalignment, air gap variations, temperature fluctuations, and external magnetic fields, coupled with a wide operating temperature range (-40C to 150C), makes it ideal for harsh industrial and medical environments. Multiple AS5048 ICs can be daisy-chained for serial data readout. The device supports both 3.3V and 5V supply voltages.
Product Attributes
- Brand: ams
- Product Type: Magnetic Rotary Encoder (14-Bit Angular Position Sensor)
- Interfaces: SPI (AS5048A), IC (AS5048B), PWM
- Resolution: 14-bit
- Operating Temperature: -40C to 150C
- Supply Voltage: 3.3V / 5V
- Package: 14-pin TSSOP (5 x 6.4mm)
Technical Specifications
| Parameter | AS5048A/AS5048B | Unit | Notes |
| Supply Voltage (VDD5V) | 4.5 - 5.5 | V | 5V Operation via LDO |
| Supply Voltage (VDD3V) | 3 - 3.6 | V | LDO output voltage |
| Core Supply Voltage (VDDCORE) | 3 - 3.6 | V | |
| Ambient Temperature (TAMB) | -40 - 150 | C | Only for 5V operation. T_amb_max for 3V is 125C |
| Supply Current (ISUP) | 15 | mA | |
| High Level Input Voltage (VIH) | 0.7 * VDDCORE | V | CMOS Digital Input with Schmitt Trigger: CSn, CLK, MOSI and SCL, A1, A2 |
| Low Level Input Voltage (VIL) | 0.3 * VDDCORE | V | CMOS Digital Input with Schmitt Trigger: CSn, CLK, MOSI and SCL, A1, A2 |
| Input Leakage Current (ILEAK) | 1 | A | CMOS Digital Input with Schmitt Trigger |
| High Level Output Voltage (VOH) | VDDCORE - 0.5 | V | CMOS Output: PWM, MISO, SDA |
| Low Level Output Voltage (VOL) | GND+0.4 | V | CMOS Output: PWM, MISO, SDA |
| Capacitive Load (CL) | 50 | pF | CMOS Output |
| Output Current (IOUT) | 4 | mA | CMOS Output |
| Magnetic Input Field (Bz) | 30 - 70 | mT | |
| Output Sampling Rate (fsample) | 10.2 - 12.4 | kHz | |
| Output Resolution | 14 | Bit | |
| Sensor Output Noise | 2.73LSB@14bit, rms value | 0.06 deg | |
| System Propagation Delay (tprop) | 90.7 - 110.2 | s | |
| PWM Frequency (fPWM) | 0.907 - 1.102 | kHz | |
| Non-linearity (INLOPT @25C) | 0.8 | deg | Optimum placement of the magnet |
| Non-linearity (INL OPT+TEMP) | 1 | deg | Optimum placement of the magnet over the full temperature range |
| Non-linearity (INL DIS+TEMP) | 1.2 | deg | @ displacement of magnet and temperature (-40C to 150C), Assuming N35H magnet (D=8mm, H=3mm), 500m displacement in x and y, z-distance @ 2000m |
| Startup Time (tstartup) | 10 | ms |
2410010401_AMS-AS5048B-HTSP-500_C2655184.pdf
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