AS5048
Magnetic Rotary EncoderThe AS5048 is a magnetic rotary encoder from ams OSRAM Group. View the full AS5048 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Official AS5048 datasheet (PDF) — the source this page was extracted from.
AS5048 Key Specifications
| Parameter | Value |
|---|---|
| Interfaces | SPI (AS5048A), I2C (AS5048B), PWM output |
| Resolution | 14-bit (0.0219°/LSB) |
| Output Noise | 0.06° rms max |
| Package Size | 5 x 6.4 mm |
| Supply Current | 15 mA max |
| Magnetic Input Field | 30 mT to 70 mT (50 mT typ) |
| Output Sampling Rate | 10.2 kHz to 12.4 kHz (11.25 kHz typ) |
| Operating Temperature | -40°C to 150°C (5V operation); 125°C max for 3V operation |
| Supply Voltage (VDD5V) | 4.5V to 5.5V (5V operation via LDO) |
| System Propagation Delay | 90.7 µs to 110.2 µs (100 µs typ) |
| Supply Voltage (3.3V Operation) | 3.0V to 3.6V |
AS5048 Overview
Part: AS5048A/AS5048B — ams OSRAM Group
Type: Magnetic Rotary Encoder (14-Bit Angular Position Sensor)
Description: The AS5048 is an easy to use 360° angle position sensor with a 14-bit high resolution output, offering standard SPI (AS5048A) or I²C (AS5048B) interface and PWM output, and a wide operating temperature range of -40°C to 150°C.
Operating Conditions:
- Supply voltage: 3.0–5.5 V
- Operating temperature: -40 to 150 °C (Only for 5V operation. T_amb_max for 3V is 125°C)
- Magnetic input field: 30–70 mT
- Output resolution: 14 Bit
Absolute Maximum Ratings:
- Max supply voltage: 7 V (VDD5V)
- Max junction/storage temperature: 150 °C (Storage temperature)
Key Specs:
- Output resolution: 14 Bit
- Output sampling rate: 10.2–12.4 kHz
- PWM frequency: 0.907–1.102 kHz
- Sensor output noise: 0.06 deg (max, 2.73LSB@14bit, rms value)
- Non-linearity (optimum placement): ±0.8 deg (at 25°C)
- Non-linearity (optimum placement, full temp range): ±1 deg
- Supply current: 15 mA (max)
- Input leakage current: 1 μA (max)
Features:
- Contactless rotary position sensor over 360°
- 3.3V / 5V compliant
- Standard SPI (AS5048A) or I²C (AS5048B) interface and PWM output
- 14-bit resolution (0.0219°/LSB)
- Zero position programmable via SPI or I²C
- Immune to external magnetic stray fields
- Daisy chain capability for serial data read out
Applications:
- Robotic joint position detection
- Industrial motor position control
- Medical robots and fitness equipment
Package:
- 14-pin TSSOP (5 x 6.4mm)
AS5048 Features
The benefits and features of AS5048A/AS5048B, Magnetic Rotary Encoder (14-Bit Angular Position Sensor) are listed below:
Figure 2: AS5048A Block Diagram
Figure 2: AS5048A Block Diagram
- Contactless rotary position sensor over 360°
- Temperature range: -40°C to 150°C
- 3.3V / 5V compliant
- Package: 14-pin TSSOP (5 x 6.4mm)
AS5048 Applications
The applications of AS5048 include:
- Robotic joint position detection
- Industrial motor position control
- Medical robots and fitness equipment
AS5048 Pin Configuration
Figure 4:
TSSOP14 Pin Configurations
Figure 5: TSSOP14 Pin Descriptions for AS5048A
| Pin | AS5048A | Pin Type | Description |
|---|---|---|---|
| 1 | CSn | Digital input with Schmitt trigger | SPI chip select - active low |
| 2 | CLK | Digital input with Schmitt trigger | SPI clock input |
| 3 | MISO | Digital I/O with Schmitt trigger in the input path | SPI master in/slave out |
| 4 | MOSI | Digital input with Schmitt trigger | SPI master out/slave in |
| 5 | TEST | Analog I/O | Test pin should be connected to GND. |
| 6 | TEST | Analog I/O | Test pins should be left open during normal operation. |
| 7 | TEST | Analog I/O | Test pins should be left open during normal operation. |
| 8 | TEST | Analog I/O | Test pins should be left open during normal operation. |
| 9 | TEST | Analog I/O | Test pins should be left open during normal operation. |
| 10 | TEST | Analog I/O | Test pins should be left open during normal operation. |
| 11 | VDD5V | Supply pad | Positive Supply Voltage, 3.0 to 5.5 V |
| 12 | VDD3V | Supply pad | 3.3V Regulator output; internally regulated from VDD. Connect to VDDfor3Vsupplyvoltage. 10μF capacitor to GNDrequired in 5V operation mode |
| 13 | GND | Supply pad | Negative Supply Voltage (GND) |
| 14 | PWM | Digital output - push-pull | Pulse Width Modulation output |
The AS5048A/AS5048B pin assignments are described below.
Figure 6:
AS5048 Electrical Characteristics
Figure 8: Operating Conditions
| Symbol | Parameter | Min | Max | Unit | Note |
|---|---|---|---|---|---|
| VDD5V | Positive supply voltage | 4.5 | 5.5 | V | 5V Operation via LDO |
| VDD3V | 3 | 3.6 | V | LDO output voltage | |
| VDDCORE | Positive core supply voltage | 3 | 3.6 | V | |
| T AMB | Ambient temperature | -40 | 150 | °C | Only for 5V operation. T_amb_maxfor 3V is 125°C |
| I SUP | Supply current | 15 | mA |
AS5048 Absolute Maximum Ratings
Figure 7: Absolute Maximum Ratings
| Symbol | Parameter | Min | Max | Unit | Note |
|---|---|---|---|---|---|
| Electrical Parameters | Electrical Parameters | Electrical Parameters | Electrical Parameters | Electrical Parameters | Electrical Parameters |
| VDD5V | DC supply voltage at VDD pin | -0.3 | 7 | V | |
| VDD3V | DC voltage at VDD3V pin | -0.3 | 5 | V | |
| GND | DC voltage at GNDpin | -0.3 | 0.3 | V | |
| V IN | Input pin voltage | VDD+0.3 | V | ||
| I SCR | Input current (latchup immunity) | -100 | 100 | mA | Jedec 78 |
| Electrostatic Discharge | Electrostatic Discharge | Electrostatic Discharge | Electrostatic Discharge | Electrostatic Discharge | Electrostatic Discharge |
| ESD | Electrostatic discharge | ± | 2 | kV | MIL 883 E method 3015 |
| Power Dissipation | Power Dissipation | Power Dissipation | Power Dissipation | Power Dissipation | Power Dissipation |
| P T | Total power dissipation (all supplies and outputs) | 150 | mW | ||
| Temperature Ranges and Storage Conditions | Temperature Ranges and Storage Conditions | Temperature Ranges and Storage Conditions | Temperature Ranges and Storage Conditions | Temperature Ranges and Storage Conditions | Temperature Ranges and Storage Conditions |
| T STRG | Storage temperature | -55 | 150 | °C | |
| T BODY | Package body temperature | 260 | °C | The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020 'Moisture Solid State Surface Mount Devices' . The lead finish from Pb-free leaded packages is matte tin (100%Sn) | |
| RH NC | Relative humidity non-condensing | 5 | 85 | % | |
| MSL | Moisture sensitivity level | 3 | 3 | Represents a maximum floor life time of 168h |
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under Operating Conditions is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
AS5048 Package Information
The internal Hall elements are placed in the center of the package on a circle with a radius of 1.1 mm.
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| AS5048A | ams OSRAM Group | TSSOP-14 |
| AS5048A-HTSP | ams OSRAM Group | 14-pin TSSOP (5 x 6.4mm) |
| AS5048B | ams OSRAM Group | TSSOP-14 |
| AS5048B-HTSP | ams OSRAM Group | TSSOP 14 |
Other Sensors
- ICM-20948 – TDK InvenSense, 9-axis MotionTracking device
- MPU-6050 – TDK InvenSense, 6-Axis MEMS IMU
- MAX30102 – Analog Devices, Pulse Oximetry and Heart-Rate Monitor Module
- MPU-9250 – TDK InvenSense, 9-Axis MotionTracking IMU
- AD5941 – Analog Devices, High Precision, Impedance, and Electrochemical Front End
- AH3722 – Diodes Incorporated, Hall-effect latch IC
- AH3722-P-A – Diodes Incorporated, Hall-effect latch IC
- AH3722-P-B – Diodes Incorporated, Hall-effect latch IC
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