Product Description
The KXTJ2 is a tri-axis +/-2g, +/-4g or +/-8g silicon micromachined accelerometer. 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 digital
communications.  The accelerometer is delivered in a 2 x
2 x 0.9 mm LGA plastic package operating from a 1.8 –
3.6V DC supply.  Voltage regulators are used to maintain
constant internal operating voltages over the range of
input supply voltages. This results in stable operating
characteristics over the range of input supply voltages and virtually undetectable ratiometric error.  The I2C digital protocol is used to communicate with the chip to configure the part and monitor outputs.
Functional Diagram
Product Specifications
timeout of 5000ms exceededTable 1.  Mechanical
Notes:
1. Resolution and acceleration ranges are user selectable via I2C.
2. 14-bit Resolution is only available for registers 0x06h – 0x0Bh in the 8g Full Power mode
3. Resonance as defined by the dampened mechanical sensor.
Table 2.  Electrical
Notes:
1. Current varies with Output Data Rate (ODR) see table below.
2. For I2C communication, this assumes a minimum 1.5kΩ pull-up resistor on SCL and
SDA pins.
3. Start up time is from PC1 set to valid outputs.  Time varies with Output Data Rate
(ODR); see chart below
4. Power up time is from Vdd and IO_Vdd valid to device boot completion.
5. User selectable through I2C.
6. User selectable and dependent on ODR and RES.

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