FXOS8700CQ
NXP
Figure 4 shows the electrical connections for one-shot method using Freescale FXOS8700 magnetometer. ... FXOS8700CQ
Application NoteNxp
Optimizing Magnetic Sensor Power Operations for Low Data Rates
Guide to reducing power consumption in NXP MAG3110 and FXOS8700CQ magnetometers using one-shot and power cycling methods for low data rate IoT applications.
Overview
This application note (AN4984) describes methods to minimize power consumption in the NXP MAG3110 digital magnetometer and FXOS8700 6-axis e-compass for applications with data rates below 1 Hz. It details two specific measurement techniques: the one-shot method, which transitions the sensor to standby between samples, and the power cycling method, which completely deactivates the sensor to achieve average currents as low as 500 nA at 0.1 Hz. The document provides application circuits, register-level configuration steps, and comparative analysis regarding ADC settling times and hardware modifications like bypass capacitor optimization to reduce charge/discharge cycles.
Use Cases
- Battery-powered IoT sensing
- Low data rate magnetic field monitoring
- Power budget optimization for electronic compasses
- Ultra-low power sensor interfacing
Topics
MAG3110
FXOS8700CQ
magnetometer
low power
one-shot measurement
power cycling
IoT
current consumption
e-compass
Referenced Parts
MAG3110
NXP
This application note describes two measurement methods associated with reducing current consumption in low data rate applications for two Freescale magnetometers (FXOS8700 6-Axis E-Compass and MAG3110 Digital Magnetometer)
| FXOS8700CQ | NXP | Figure 4 shows the electrical connections for one-shot method using Freescale FXOS8700 magnetometer. ... FXOS8700CQ |
| MAG3110 | NXP | This application note describes two measurement methods associated with reducing current consumption in low data rate applications for two Freescale magnetometers (FXOS8700 6-Axis E-Compass and MAG3110 Digital Magnetometer) |