KXTI9 Accelerometer
3x3x0.9mm Accelerometer with FIFO/FILO Buffer
FEATURES
Small Package - 3x3x0.9mm LGA
User-selectable g Range
User-selectable Output Data Rate
Enhanced integrated Directional Tap/Double-
TapTM, Activity-monitoring, and Device-orientation
Algorithms
Digital I2C
8-bit or 12-bit Resolution
FIFO/FILO Memory Buffer
Digital High-Pass Filter Outputs
Low Power Consumption
Lead-free Solderability
Excellent Temperature Performance
High Shock Survivability
Factory Programmable Offset and Sensitivity
Self-test Function
APPLICATIONS
User Interface
Power Management
Active/Inactive Monitoring
Device Orientation
Inclination and Tilt Sensing
Gesture Recognition
Tap Detection
Pedometer/Activity Monitoring
FOR
Smartphones and Mobile Devices
Laptops
Gaming and Virtual Reality
Health and Fitness
PRODUCT OVERVIEW
The Kionix KXTI9 is a low power, high performance tri-axis
accelerometer with digital I2C output. The KXTI9 features user
selectable parameters including 8 or 12 bit modes, g-ranges from
+- 2, 4 or 8g, and Output Data Rates from 12.5 Hz to 800 Hz. A
252 byte FIFO/FILO buffer offers programmable watermark
interrupt and provides a triggered low resolution or high resolution
mode.
Pin and register compatible with Kionix’ popular KXTF9, the KXTI9
features enhanced embedded Screen Rotation, Directional
Tap/Double Tap, Orientation Detection and Low Power Motion
Interrupt.
The KXTI9 has internal voltage regulators that allow operation from
1.8 V to 3.6 V and is delivered in a 3x3x0.9mm, 10-pin, LGA
package with an operating temperature range of -40°C to +85°C.
PERFORMANCE SPECIFICATIONS
PARAMETERS
UNITS
KXTI9-1001
CONDITION
Range
g
±2.0, ±4.0, ±8.0
User-selectable full-scale output range
Sensitivity1
counts/g
64, 32, 16
8-bit
1024, 512, 256
12-bit
0g Offset vs. Temp
mg/°C
±0.7 (xy) ±0.4 (z) typical
-40°C to +85°C
Sensitivity vs. Temp
%/°C
±0.01 (xy) ±0.03 (z) typical
-40°C to +85°C
Mechanical Resonance2
Hz
3500 (xy) 1800 (z) typical
-3dB
Output Data Rate (ODR)3
Hz
12.5 min; 800 max
Bandwidth (-3dB)4
kHz
1.59
RES = 0
Hz
ODR/2
RES = 1
Non-Linearity
% of FS
1.0 typical
% of full scale output
Cross-axis Sensitivity
%
2.0 typical
I2C Communication Rate
kHz
400 max
Power Supply
V
2.6 typical
1.8V – 3.6V
Current Consumption
µA
325 typical
RES = 1; Operating
165 typical
RES = 0; ODR = 400Hz;
Directional TapTM
100 typical
RES = 0; ODR ≤ 25Hz; Low Power
10 typical
Standby
ENVIRONMENTAL SPECIFICATIONS
PARAMETERS
UNITS
KXTI9-1001
CONDITION
Operating Temperature
°C
-40 to 85
Powered
Storage Temperature
°C
-55 to 150
Un-powered
Mechanical Shock
g
5,000, 0.5 ms
10,000, 0.2 ms
Powered or un-powered,
halversine
ESD
V
2,000
Human body model
NOTES
1 Resolution and acceleration ranges are user selectable via I2C.
2 Resonance as defined by the dampened mechanical sensor.
3 User selectable through I2C.
4 User selectable; dependent on ODR and 8-bit or 12-bit resolution.
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.
KXTI9 Accelerometer
3x3x0.9mm Accelerometer with FIFO/FILO Buffer
