AS5048A magnetic rotary encoder pinout

The AS5048A reads the absolute angle of a rotating diametrically magnetized magnet. It reports 14-bit angular position over SPI and provides a separate PWM output.

TSSOP-14

14 contacts Current package

ams OSRAM ·

TSSOP-14 pinout

Top view. Start at the package pin-1 index and follow the numbered leads.

Selected pin details

14 · PWM

Push-pull output · Outputs

Pulse-width-modulated angle output. Leave open if unused.

ams OSRAM DS000298 v1-11, Figures 4–5 and 11, and the SPI interface section.

Electrical limits · Link to this pin

All 14 pins

Pin	Signal	Direction	Function
1	CSn Input	Input	Active-low SPI chip select.
2	CLK Input	Input	SPI clock.
3	MISO Output	Output	Serial data from sensor to host.
4	MOSI Input	Input	Serial data from host to sensor.
5	TEST Tie to ground	Tie to ground	This test pin must connect to ground.
6	TEST Leave open	Leave open	Leave this test contact open in normal operation.
7	TEST Leave open	Leave open	Leave this test contact open in normal operation.
8	TEST Leave open	Leave open	Leave this test contact open in normal operation.
9	TEST Leave open	Leave open	Leave this test contact open in normal operation.
10	TEST Leave open	Leave open	Leave this test contact open in normal operation.
11	VDD5V Supply input	Supply input	Main input in both the 5 V and 3.3 V configurations.
12	VDD3V Supply or regulator output	Supply or regulator output	Tie to VDD5V for 3.3 V operation. In 5 V operation, fit the specified 10 µF capacitor and attach no external load.
13	GND Supply return	Supply return	Connect to the common ground plane or bench return.
14	PWM Push-pull output	Push-pull output	Pulse-width-modulated angle output. Leave open if unused.

Signal assignments

SPI

16-bit SPI frames with even parity. The reply arrives in the following frame.

PWM

Angle can also be measured from the PWM timing without using the serial interface.

PWM (14)

Electrical limits

Parameter	Limit	Conditions and source
Supply configurations3.0–3.6 V or 4.5–5.5 V	3.0–3.6 V or 4.5–5.5 V	Select the wiring for VDD3V according to the supply configuration. ams OSRAM DS000298 v1-11, Figures 4–5 and 11, and the SPI interface section.
Angle code14 bits · 0 to 16383	14 bits · 0 to 16383	One turn is 360°, so one ideal code step is approximately 0.022°. This is resolution. ams OSRAM DS000298 v1-11, Figures 4–5 and 11, and the SPI interface section.
SPI transfer16 bits · even parity	16 bits · even parity	Read the response and error flag on the frame after the command. ams OSRAM DS000298 v1-11, Figures 4–5 and 11, and the SPI interface section.

Models and documents

This map covers the SPI AS5048A. The I²C AS5048B has different functions on pins 1–4.

AS5048A: SPI and PWM version.

AS5048A manufacturer documentation· ams OSRAM DS000298 v1-11, Figures 4–5 and 11, and the SPI interface section.