Asahi Kasei Microdevices (AKM) is a leading manufacturer of 3-axis electronic compass using Hall element technology. We have the leading market share in the global 3-axis electronic compass for consumer applications and play a pivotal role in expanding the use of the electronic compass.

AKM electronic compass uses magnetic sensors (Hall element) with wide dynamic range and ideal linearity. The silicon monolithic structure achieves high accuracy and reliability, and it is optimized for high-volume manufacturing. Based on this technology, AKM's electronic compass can detect azimuth direction with a very high accuracy. In addition, with small and thin packaging, AKM’s electronic compass is widely used in products with limited mounting space, such as Smartphones.
AKM, with its extensive knowledge of electronic compass, is the ideal partner if you are considering to implement a “pedestrian navigation with GPS” on a cell phone, mobile tablet or mobile PC.

We provide not only hardware, but also DOE™ compensation software (winning "the Imperial Invention Award of the Japan Institute of Invention and Innovation" FY 2012), in addition to other software applications that enhance the user experience with our electronic compass.
The combination of hardware, software and technical support is an advantageous characteristic of the AKM electronic compass.

We will continue to provide the best solution through development of the compact, low-voltage and high-performance electronic compass and advanced software to our customers in the future.

Lineup

Lineup

AK09917D
AKM releases a 3-axis Electronic Compass with the new I3C interface; the AK09917D is available now

● AK09917D adopted the I3C interface compatible with high-speed communication. Reducing the data acquisition time of the MCU reduces the power consumption of the entire system. Furthermore, while maintaining the high performance of AK09915D, the package size has been reduced to the same size of AK09916C.
AK09917D will contribute to the needs such as low power consumption of the system and reduction of the mounting area.

AK09917D
AK09917D

AK09918C
The World's Smallest Class* 3-axis Electronic Compass for Mobile Devices

● The world's smallest class*

AK09918C realizes the smallest size 0.76 mm × 0.76 mm x 0.5 mm (63% size of the conventional product AK09916C) of our company while maintaining the high performance of the conventional product AK09916C.
It is housed in 0.4mm pitch 4-pin WL-CSP package. (power supply 2 pins, 2 pins for I2C communication)

[Notes] * According to AKM as of January 1, 2017.

AK09918C
AK09918C

AK09915C / AK09915D
The 3-axis Electronic Compass with FIFO* Buffer for Smartphone

● The Electronic Compass with FIFO Buffer

The AK09915C has a 32-step FIFO buffer, which minimizes the load on the host processor reducing the number of interrupts by the electronic compass with FIFO. For example, system power consumption can be reduced using FIFO when executing a data logging that does not need a real-time response.

● Support 200Hz Output Data Rate (ODR)

The AK09915C has built-in magnetic sensitivity adjustment circuit, so users don't need to adjust magnetic sensitivity by software.

●Low-Power Consumption Mode/Low-Noise Mode

The AK09915C has two drive modes: low-power and low-noise drive modes. In low-power mode, the consumption current can be suppressed by 10% compared with the AK09912C. In low-noise mode, measured noise will be reduced to half of that compared to the previous AK09912C. Additional noise reduction is available with a Noise Suppression Filter (NSF).

● One-chip Electronic Compass Architecture with Wide Measurement Range

The AK09915C inherits advanced characteristics from AKM’s established hall elements technology, like a wide measurement range. This wider measurement range makes the compass less sensitive to magnetic interference from other parts within the portable device, providing greater freedom in device design by enabling more flexibility in the placement of the compass on the printed circuit board.

Lineup

Product Name NEW AK09917D
3-axis electronic compass
AK09918C
3-axis electronic compass
AK09915C/D
3-axis electronic compass
AK8963
3-axis electronic compass

AK09917D AK09918C AK09915D
Sales Release January 2018 January 2017 2016 2011
Status Available Now
RND*
Available Now
RND*
Available Now
RND*
Available Now
NRND*
Samples

Distributors /
Representatives

Global WEB Distributor
Digi-Key
Global WEB Distributor
Digi-Key
Global WEB Distributor
Digi-Key

[Notes] * RND: Recommend for New Design * NRND: Not Recommend for New Design

Part# Data
Sheet
Automotive
Qualified
Sensitivity Analog
power
supply
Digital
Interface
supply
Current
consumption
(Power-down)
Current
consumption
(Measurement)
I/F Package
      µT/LSB typ. V V µA typ. µA typ.    
   
AK09915C0.15
1.7 to 3.61.65 to VDD3900@100Hz

I2C/

4-wireSPI

14-WLCSP
AK09917D
0.15/0.30
1.65 to 1.9511100 / 600 @100HzI2C/I3C5-WLCSP
AK09918C0.15
1.65 to 1.9511100@100HzI2C4-WLCSP

The Basics of Electronic Compass

This page and accompanying animations provide a basic overview of an electronic compass and explains how it has become valuable in various applications such as navigation devices.

What is an Electronic Compass?

Electronic Compass : How it works

Design Support

Design Support

Evaluation board

AKM Sensor Control Program support two types of evaluation boards that can be used for developing software of AKM electronic compass are available.

Sensor daughter board

AKM electronic compass and 3 axis acceleration sensor mounted board can be provided.

16×20mm

AKM Sensor Evaluation board for Arduino

Board that connects above Sensor daughter board to the MCU board with Arduino Uno equivalent connector.

* These evaluation boards will be charged. For details, please contact our sales representative or agency.

* Please prepare the MCU board by customer.

Software

Software for Android

Open-source Android software is available for download from the link below.


Download link :
"github.com"

FAQ

FAQ
(Frequently Asked Questions)

How to calibrate the electronic compass

When you are using compass application on a mobile terminal (such as a smartphone), have you ever seen the message such as "Interference from a magnetic field. Re-calibrate by waving the phone in a figure 8 motion"? This message is displayed when the phone moves into a magnetic field, and the electronic compass suffers interference from the field. When this occurs, the electronic compass can't detect the azimuth direction at a high accuracy without a re-calibration.

We don't neet to manually re-calibrate, because the AKM electronic compass has an auto-calibration routine by software. However, the method of "waving the cell phone in a figure 8 motion" is quick and effective method to re-calibration. But, you don't know how to move the phone in "a figure 8 motion", don't you ? So, we have created a web-site that explains in detail how to calibrate the electronic compass.

You can easily learn about how to calibrate while watching the video in this web-site.
Come web-site to see it for yourself.

Web-site link :
"Official Site for Electronic Compass Calibration"

Spec. Comparison

Specifications Comparison

Product Name AK09917D
3-axis electronic compass
AK09918C
3-axis electronic compass
AK09915C/D
3-axis electronic compass

AK09917D AK09918C AK09915D
Sensitivity [μT/LSB]0.15 / 0.30*0.15
Output Data
Resolution
[bit]16
Measurement Range [μT]±4,900
Maximum ODR [Hz]100 / 200*100200
Current Consumption
(@100Hz ODR)
[mA]1.1 / 0.6*1.11.8 / 0.9*
Power Supply Voltage [V]VDD: 1.65 to 1.95VDD: 1.7 to 3.6
Interface
I2C/I3CI2CI2C/4-wire SPI
Interrupter Pin
Open DrainN/APush Pull/Open Drain
FIFO
32 steps-32 steps
Operating Temperature [°C]-30 to 85
Package
(Size)
[mm]5-pin WL-CSP
(1.2 x 0.8 x 0.5)
4-pin WL-CSP
(0.8 x 0.8 x 0.5)
14-pin WL-CSP
(1.6 x 1.6 x 0.5)
Sales Release
January 2018January 20172016
Sample

Distributors/Reprentaive


WEB Distributor
Digi-Key
WEB Distributor
Digi-Key
[Notes]

*Low Power Drive

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