KX022 Accelerometer
2x2x0.9mm Accelerometer with FIFO/FILO Buffer
FEATURES
2x2x0.9mm 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 KX022 is a robust, low-power, I2C/SPI, 3-axis
accelerometer with 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. The KX022 also offers accelerometer
outputs with 16-bit resolution for greater precision. User-
selectable parameters include ± 2g, 4g or 8g ranges and
Output Data Rates (ODR) with programmable high-pass and
low-pass filters. It is packaged in an ultra-small, 12-pin,
2x2x0.9mm LGA plastic package.
PERFORMANCE SPECIFICATIONS
PARAMETERS
UNITS
KX022-1020
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
KX022-1020
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
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.
KX022 Accelerometer
2x2x0.9mm Accelerometer with FIFO/FILO Buffer
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).
