PART NUMBER:
± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
KXTF9-2050
Rev. 7
Jun-2011
Product Description
The KXTF9 is a tri-axis +/-2g, +/-4g or +/-8g silicon
micromachined
accelerometer
with
integrated
orientation, tap/double tap, and activity detecting
algorithms. The sense element is fabricated using
Kionix’s proprietary plasma micromachining process
technology. Acceleration sensing is based on the
principle of a differential capacitance arising from
acceleration-induced motion of the sense element,
which further utilizes common mode cancellation to
decrease errors from process variation, temperature,
and environmental stress. The sense element is
hermetically sealed at the wafer level by bonding a
second silicon lid wafer to the device using a glass frit.
A separate ASIC device packaged with the sense
element provides signal conditioning, and intelligent
user-programmable application algorithms. The
accelerometer is delivered in a 3 x 3 x 0.9 mm LGA
plastic package operating from a 1.8 – 3.6V DC supply. I
2
C interface is used to communicate to
the chip to configure and check updates to the orientation, Directional Tap
TM
detection and activity
monitoring algorithms.
36 Thornwood Dr. – Ithaca, NY 14850
tel: 607-257-1080 – fax:607-257-1146
www.kionix.com -
info@kionix.com
© 2010 Kionix – All Rights Reserved
424-2397-1106241613
Page 1 of 49
PART NUMBER:
± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
KXTF9-2050
Rev. 7
Jun-2011
Functional Diagram
X
Sensor
Y
Sensor
Charge
Amp
A/D
Z
Sensor
Vdd
5
IO Vdd
1
GND
4
7
9
10
I
2
C
Digital Engine
Digital
Filter
36 Thornwood Dr. – Ithaca, NY 14850
tel: 607-257-1080 – fax:607-257-1146
www.kionix.com -
info@kionix.com
© 2010 Kionix – All Rights Reserved
424-2397-1106241613
Page 2 of 49
PART NUMBER:
± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
KXTF9-2050
Rev. 7
Jun-2011
Product Specifications
Table 1. Mechanical
(specifications are for operation at 3.3V and T = 25C unless stated otherwise)
Parameters
Operating Temperature Range
Zero-g Offset
Zero-g Offset Variation from RT over Temp.
GSEL1=0, GSEL=0 (± 2g)
Sensitivity (12-bit)
1
Units
ºC
mg
mg/ºC
Min
-40
-125
Typical
-
-
0.7 (xy)
0.4 (z)
Max
85
+125
988
counts/g
494
247
61
30
15
1024
512
256
64
32
16
0.01 (xy)
0.03 (z)
0.3
0.4 (xy)
0.2 (z)
2.9 (x)
2.7 (y)
1.8 (z)
3500 (xy)
1800 (z)
1
2
1060
530
265
67
34
17
GSEL1=0, GSEL0=1 (± 4g)
GSEL1=1, GSEL0=0 (± 8g)
GSEL1=0, GSEL=0 (± 2g)
GSEL1=0, GSEL0=1 (± 4g)
GSEL1=1, GSEL0=0 (± 8g)
Sensitivity (8-bit)
1
counts/g
Sensitivity Variation from RT over Temp.
Offset Ratiometric Error (V
dd
= 3.3V ± 5%)
Sensitivity Ratiometric Error (V
dd
= 3.3V ± 5%)
%/ºC
%
%
Self Test Output change on Activation
g
Mechanical Resonance (-3dB)
Non-Linearity
Cross Axis Sensitivity
2
Hz
% of FS
%
Notes:
1. Resolution and acceleration ranges are user selectable via I C.
2. Resonance as defined by the dampened mechanical sensor.
2
36 Thornwood Dr. – Ithaca, NY 14850
tel: 607-257-1080 – fax:607-257-1146
www.kionix.com -
info@kionix.com
© 2010 Kionix – All Rights Reserved
424-2397-1106241613
Page 3 of 49
PART NUMBER:
± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
KXTF9-2050
Rev. 7
Jun-2011
Table 2. Electrical
(specifications are for operation at 3.3V and T = 25C unless stated otherwise)
Parameters
Supply Voltage (V
dd
)
Operating
All On (Res = 1)
Current Consumption All On (RES = 0)
Standby
Output Low Voltage
Output High Voltage
Input Low Voltage
Input High Voltage
Input Pull-down Current
RES = 0
RES = 1, ODR = 25 Hz
RES = 1, ODR = 50Hz
2
Start Up Time
RES = 1, ODR = 100Hz
RES = 1, ODR = 200Hz
RES = 1, ODR = 400Hz
RES = 1, ODR = 800Hz
3
Power Up Time
2
I C Communication Rate
Output Data Rate (ODR)
Bandwidth (-3dB)
5
4
1
Units
V
V
A
V
V
V
V
A
Min
1.8
1.7
740
Typical
3.3
840
360
0.1
-
-
-
-
0
0.050
80
40
20
10
5
2.5
20
50
1.59
ODR/2
Max
3.6
V
dd
940
I/O Pads Supply Voltage (V
IO
)
-
0.9 * V
io
-
0.8 * V
io
0.2 * V
io
-
0.2 * V
io
-
ms
ms
kHz
Hz
kHz
Hz
25
400
800
RES = 0
RES = 1
Notes:
2
1. Assuming I C communication and minimum 1.5k pull-up resistor on SCL and SDA
pins. Assuming Vio < 2V, if Vio > 2 V then the maximum Output Low Voltage is 0.4V.
2. Start up time is from PC1 set to valid outputs.
3. Power up time is from Vdd valid to device boot completion.
2
4. User selectable through I C.
5. User selectable and dependant on ODR and RES.
36 Thornwood Dr. – Ithaca, NY 14850
tel: 607-257-1080 – fax:607-257-1146
www.kionix.com -
info@kionix.com
© 2010 Kionix – All Rights Reserved
424-2397-1106241613
Page 4 of 49
PART NUMBER:
± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
KXTF9-2050
Rev. 7
Jun-2011
Table 3. Environmental
Parameters
Supply Voltage (V
dd
) Absolute Limits
Operating Temperature Range
Storage Temperature Range
Mech. Shock (powered and unpowered)
ESD
HBM
Units
V
ºC
ºC
g
V
Min
-0.3
-40
-55
-
-
Typical
-
-
-
-
-
Max
6.0
85
150
5000 for 0.5ms
10000 for 0.2ms
2000
Caution: ESD Sensitive and Mechanical Shock Sensitive Component, improper handling
can cause permanent damage to the device.
This product conforms to Directive 2002/95/EC of the European Parliament and of the
Council of the European Union (RoHS). Specifically, this product does not contain lead,
mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or
polybrominated diphenyl ethers (PBDE) above the maximum concentration values (MCV)
by weight in any of its homogenous materials. Homogenous materials are "of uniform
composition throughout."
This product is halogen-free per IEC 61249-2-21. Specifically, the materials used in this
product contain a maximum total halogen content of 1500 ppm with less than 900-ppm
bromine and less than 900-ppm chlorine.
HF
Soldering
Soldering recommendations are available upon request or from
www.kionix.com.
36 Thornwood Dr. – Ithaca, NY 14850
tel: 607-257-1080 – fax:607-257-1146
www.kionix.com -
info@kionix.com
© 2010 Kionix – All Rights Reserved
424-2397-1106241613
Page 5 of 49
