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KXTC8-2850

型号：

KXTC8-2850

品牌：

ROHM[ ROHM ]

页数：

9 页

PDF大小：

302 K

下载PDF手册
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
Product Description  
The KXTC8-2850 is  
a
Tri-axis, silicon micromachined  
accelerometer with a full-scale output range of +/-2.86g (28 m/s/s).  
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 self-test. The accelerometer is delivered in  
a 4 x 4 x 1.3mm Land Grid Array (LGA) plastic package operating  
from a 1.8 – 3.6V DC supply. The KXTC8 features a factory  
programmable low pass filter, eliminating the need for external filter capacitors on the acceleration  
outputs.  
There are 2 factory programmable modes of operation for the KXTC8:  
Mode 00 – The Power Down pin must be high for normal operation and low for power shutdown.  
Mode 01 – The Power Down pin must be low for normal operation and high for power shutdown.  
The KXTC8-2850 is factory programmed to be in MODE 01.  
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  
404-2172M-1104181557  
Page 1 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
Functional Diagram  
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  
404-2172M-1104181557  
Page 2 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-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  
Units  
ºC  
Min  
-40  
Typical  
Max  
85  
-
V
1.581  
1.65  
0.7  
1.719  
Zero-g Offset Variation from RT over Temp.  
Sensitivity  
mg/ºC  
mV/g  
448  
462  
476  
0.01 (xy)  
0.03 (z)  
0.2  
Sensitivity Variation from RT over Temp.  
Offset Ratiometric Error (Vdd = 3.3V 5%)  
Sensitivity Ratiometric Error (Vdd = 3.3V 5%)  
%/ºC  
%
0.4 (xy)  
0.15 (z)  
2.7 (x)  
2.6 (y)  
1.8 (z)  
3500 (xy)  
1800 (z)  
0.2  
%
Self Test Output change on Activation  
Mechanical Resonance (-3dB)1  
g
Hz  
Non-Linearity  
% of FS  
%
Cross Axis Sensitivity  
Noise Density (on filter pins)  
2
µg / √Hz  
130  
Notes:  
1. Resonance as defined by the dampened mechanical sensor.  
Table 2. Electrical  
(specifications are for operation at 3.3V and T = 25C unless stated otherwise)  
Parameters  
Units  
V
Min  
Typical  
Max  
Supply Voltage (Vdd) Operating  
1.8  
3.3  
3.6  
Operating (full power)  
µA  
180  
230  
280  
Current Consumption  
Standby  
µA  
5
32  
Analog Output Resistance(Rout  
Power Up Time1  
)
24  
-
40  
-
kΩ  
ms  
Hz  
5*Rout*C  
Bandwidth (-3dB)2  
no low pass  
Notes:  
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  
404-2172M-1104181557  
Page 3 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
1. Power up time is determined by 5 times the RC time constant of the factory programmed or  
user defined low pass filter.  
2. Factory programmable to have a switched capacitor low pass filter at 2kHz, 1kHz, 500Hz,  
100Hz, 50Hz, or no low pass filter. Optionally, the user can define with external capacitors.  
Maximum defined by the frequency response of the sensors.  
Table 3. Environmental  
Parameters  
Units  
V
Min  
-0.3  
-40  
Typical  
Max  
6.0  
Supply Voltage (Vdd) Absolute Limits  
Operating Temperature Range  
Storage Temperature Range  
-
-
-
ºC  
85  
ºC  
-55  
150  
5000 for 0.5ms  
10000 for 0.2ms  
Mech. Shock (powered and unpowered)  
g
-
-
-
-
ESD  
HBM  
V
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  
404-2172M-1104181557  
Page 4 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
Application Schematic  
Vdd  
16  
15  
14  
13  
1
X
12  
11  
C1  
2
3
4
ST  
C2  
KXTC8  
Y
10  
9
C3  
5
6
7
8
Z
C4  
PD  
Table 4. KXTC8 Pin Descriptions  
Pin  
1
Name  
NC  
ST  
Description  
Not Connected Internally  
2
Self Test (0=normal operating mode, 1 = self test mode)  
Not Connected Internally  
Not Connected Internally  
3
NC  
NC  
4
5
PD  
NC  
Power Down (0 = Enabled, 1 = Disabled)  
Not Connected Internally  
Ground  
6
7
GND  
Z Output  
NC  
8
Analog output of the z-channel. Optionally, a capacitor (C4) placed between this pin and ground will form a low pass filter.  
Not Connected Internally  
9
10  
11  
12  
13  
14  
15  
16  
Y Output  
NC  
Analog output of the y-channel. Optionally, a capacitor (C3) placed between this pin and ground will form a low pass filter.  
Not Connected Internally  
X Output  
NC  
Vdd  
Analog output of the x-channel. Optionally, a capacitor (C2) placed between this pin and ground will form a low pass filter.  
Not Connected Internally  
The power supply input. Decouple this pin to ground with a 0.1uF ceramic capacitor (C1).  
Connect to Vdd or GND  
Not Connected Internally  
NC  
NC  
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  
404-2172M-1104181557  
Page 5 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
Application Design Equations  
The bandwidth is determined by a factory programmable switched capacitor filter. The filter can be set at the  
factory to be 2kHz, 1kHz, 500Hz, 100Hz, 50Hz, or no low pass filter. Alternatively, bandwidth can be reduced  
by addition of a capacitor on the output pins 8, 10, and 12 according to the equation:  
4.97x10−6  
C2 = C3 = C4 =  
fBW  
Note:  
When the PD pin is connected to Vdd or left floating, the KXTC8 is shutdown and drawing very little power.  
When the PD pin is tied to GND, the unit is fully functional.  
Test Specifications  
!
Special Characteristics:  
These characteristics have been identified as being critical to the customer. Every part is tested to verify its  
conformance to specification prior to shipment.  
Table 5. Test Specifications  
Parameter  
Zero-g Offset @ RT  
Sensitivity @ RT  
Specification  
1.65 +/- 0.0693 V  
462 +/- 13.9 mV/g  
Test Conditions  
25C, Vdd = 3.3 V  
25C, Vdd = 3.3 V  
Current Consumption -- Operating 180 <= Idd <= 280 uA 25C, Vdd = 3.3 V  
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  
404-2172M-1104181557  
Page 6 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
Package Dimensions and Orientation  
4 x 4 x 1.3 mm LGA  
+Y  
+Z  
+X  
All dimensions and tolerances conform to ASME Y14.5M-1994  
When device is accelerated in +X, +Y or +Z direction, the corresponding output will increase.  
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  
404-2172M-1104181557  
Page 7 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
Static X/Y/Z Output Response versus Orientation to Earth’s surface (1-g):  
Position  
1
2
3
4
5
6
Diagram  
Top  
Bottom  
Bottom  
Top  
X
Y
Z
1.188 V  
1.65 V  
1.65 V  
1.65 V  
2.112 V  
1.65 V  
2.112 V  
1.65 V  
1.65 V  
1.65 V  
1.188 V  
1.65 V  
1.65 V  
1.65 V  
2.112 V  
1.65 V  
1.65 V  
1.188 V  
X-Polarity  
Y-Polarity  
Z-Polarity  
-
0
0
0
+
0
+
0
0
0
-
0
0
0
+
0
0
-
(1-g)  
Earth’s Surface  
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  
404-2172M-1104181557  
Page 8 of 9  
PART NUMBER:  
2.86g Tri-axis Analog  
Accelerometer Specifications  
KXTC8-2850  
Rev. 2  
Apr-2011  
Revision History  
REVISION DESCRIPTION  
DATE  
12-Oct-2010  
Corrected Vdd and GND pins connection on the functional diagram 18-Apr-2011  
1
2
Production Release  
"Kionix" is a registered trademark of Kionix, Inc. Products described herein are protected by patents issued or pending. No license is granted by implication or otherwise  
under any patent or other rights of Kionix. The information contained herein is believed to be accurate and reliable but is not guaranteed. Kionix does not assume  
responsibility for its use or distribution. Kionix also reserves the right to change product specifications or discontinue this product at any time without prior notice. This  
publication supersedes and replaces all information previously supplied.  
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  
404-2172M-1104181557  
Page 9 of 9  
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