Spark Logic

AK8963 three-axis magnetometer connection guide

AK8963 three-axis magnetometer WLCSP-14 · 1.59 × 1.59 mm wiring guide with power, signal assignments, and bench checks.

QFN-16 · 3 × 3 mm 16 contacts

WLCSP-14 · 1.59 × 1.59 mm

14 contacts Current package

Asahi Kasei Microdevices ·

Connect an I²C host

Required

Use a 3.3 V rail for both supplies and tie CSB and RSTN high. Tie both address straps low for 0x0C. Leave SO, RSV, TRG, TST1, and DRDY open for polling.

R1 4.7 kΩ between +3.3 V and I²C data+3.3 VR1 4.7 kΩI²C data
R2 4.7 kΩ between +3.3 V and I²C clock+3.3 VR2 4.7 kΩI²C clock
C1 100 nF (VDD) between +3.3 V and Ground+3.3 VC1 100 nF (VDD)Ground
C2 100 nF (VID) between +3.3 V and Ground+3.3 VC2 100 nF (VID)Ground

Bench checks

  • Confirm an acknowledgement at 0x0C and read company ID 0x48 from register 0x00.
  • After reading the sensitivity adjustments as described in the datasheet, return to power-down mode. Write 0x11 to CNTL1 (0x0A) for one 16-bit measurement.
  • Poll ST1 for data ready, then read all six axis bytes and ST2. Read ST2 to finish the acquisition and check its overflow flag before using the result.

Asahi Kasei Microdevices MS1356-E-02 (October 2013), §§ 4–5 and 7–11. Manufacturer PDF hosted by MikroElektronika.

WLCSP-14 · 1.59 × 1.59 mm wiring map

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

4321 D C B A
Transparent top view as in §10.2. The index dot is at the lower right near A1. Scroll the map to reach all contacts.
Selected pin details

A1 · DRDY

Output · Interrupts

Active-high data-ready signal. The host can also read the data-ready status bit.

Asahi Kasei Microdevices MS1356-E-02 (October 2013), §§ 4–5 and 7–11. Manufacturer PDF hosted by MikroElektronika.

Electrical limits · Pin in the reference

Models and documents

Separate maps cover the AK8963N QFN and AK8963C wafer-level packages. Match the package-specific magnetic axes in the datasheet.

AK8963C
WLCSP-14 with two unpopulated ball positions.