AS5048A magnetic rotary encoder connection guide

AS5048A magnetic rotary encoder TSSOP-14 wiring guide with power, signal assignments, and bench checks.

TSSOP-14

14 contacts Current package

ams OSRAM ·

Read absolute angle with a 3.3 V host

Required

Tie VDD5V and VDD3V together on the 3.3 V rail. Fit both bypass capacitors and ground test pin 5 only. Center a diametrically magnetized magnet over the sensor.

+3.3 V
- VDD5V (11)
- VDD3V (12)
- Host 3.3 V
- C1.1
- C2.1
Ground
- GND (13)
- TEST (5)
- Host ground
- C1.2
- C2.2
Chip select
- CSn (1)
- Host CS
Serial clock
- CLK (2)
- Host SCK
Host to encoder
- MOSI (4)
- Host MOSI
Encoder to host
- MISO (3)
- Host MISO

Bench checks

Start at 1 MHz in SPI mode 1, most significant bit first. Send a read of address 0x3FFF in one 16-bit frame and clock the reply in the next frame.
Check response parity and the error flag. Rotate the magnet and confirm that the code changes and wraps once per revolution.

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

TSSOP-14 wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

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

Selected pin details

12 · VDD3V

Supply or regulator output · Power

Tie to VDD5V for 3.3 V operation. In 5 V operation, fit the specified 10 µF capacitor and attach no external load.

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

Electrical limits · Pin in the reference

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.