KX023 Accelerometer
3x3x0.9mm Accelerometer with FIFO/FILO Buffer
FEATURES
3x3x0.9mm LGA package
Full-featured algorithm engine including:
o Tap detection, orientation detection,
activity monitoring, and embedded
motion wake-up algorithms
Low current consumption in all modes:
o 0.9 μA in standby,
o 10 μA at normal resolution, and
o 145 μA at high resolution
Two interrupt registers
User-configurable, embedded wake-up
function to conserve battery power
Internal voltage regulator to maintain
constant internal operating voltages
throughout the 1.8 - 3.6V input supply range
APPLICATIONS
User Interface
Power Management
Active/Inactive Monitoring
Device Orientation
Inclination and Tilt Sensing
Gesture Recognition
Pedometer/Activity Monitoring
Motion-controlled user interface
FOR
Smartphones and Mobile Devices
Laptops
Gaming and Virtual Reality
Health and Fitness
PRODUCT OVERVIEW
The KX023 accelerometer delivers unparalleled flexibility,
enabling you to optimize power and noise performance to meet
your product design needs. By simply selecting the output
data rate (ODR) and amount of oversampling for data
averaging you can tune power and noise performance to meet
the needs of your specific application.
In addition, the 3-axis KX023 offers I2C/SPI output and an
integrated FIFO/FILO buffer that features a wide range of
embedded functionality, including tap detection, orientation,
activity, and wake-up algorithms. Kionix’s XAC sensor
provides outstanding stability with a market-leading
combination of improved shock, reflow, and thermal
performance.
PERFORMANCE SPECIFICATIONS
PARAMETERS
UNITS
KX023-1025
CONDITION
Range
g
±2.0, ±4.0, ±8.0
User-selectable full-scale output range
Sensitivity1
counts/g
16384, 8192, 4096
16-bit
64, 32, 16
8-bit
0g Offset vs. Temp
mg/°C
0.2
-40°C to +85°C
Sensitivity vs. Temp
%/°C
0.01
-40°C to +85°C
Mechanical Resonance2
Hz
3500 (xy) 1800 (z) typical
-3dB
Output Data Rate (ODR)3
Hz
0.781 min; 50 typical; 1600 max
Non-Linearity
% of FS
0.6 typical
% of full scale output
Cross-axis Sensitivity
%
2.0 typical
Noise4
mg
0.75 typical
I2C Communication Rate
MHz
3.4 max
SPI Communication Rate
MHz
10 max
Power Supply
V
1.8V – 3.6V typical
Current Consumption5
µA
145 typical
High resolution (RES = 1)
10 typical
Low resolution (RES = 0)
0.9 typical
Standby
ENVIRONMENTAL SPECIFICATIONS
PARAMETERS
UNITS
KX023-1025
CONDITION
Operating Temperature
°C
-40 to 85
Powered
Storage Temperature
°C
-55 to 150
Un-powered
Mechanical Shock
g
5,000, 0.5 ms
Powered or un-powered,
10,000, 0.2 ms
halversine
ESD
V
2,000
Human body model
KX023 Accelerometer
3x3x0.9mm Accelerometer with FIFO/FILO Buffer
The performance parameters below are programmed and tested at 2.6 volts and T = 25°C. The device can accept
supply voltages from 1.8V to 3.6V. Due to internal voltage regulators, there should be minimal change with supply
voltage variations.
NOTES
1 Resolution and acceleration ranges are user selectable via I2C or SPI.
2 Resonance as defined by the dampened mechanical sensor.
3 User selectable through I2C or SPI.
4 RMS at 50Hz with low-pass filter = ODR/9
5 Current varies with Output Data Rate (ODR).
