ROHM Semiconductor's KXTJ3-1057 is a tri-axis ±2g, ±4g, ±8g, or ±16g silicon micromachined accelerometer. The sense element is fabricated using Kionix's proprietary plasma micromachining process technology. Acceleration sensing is based in 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 mm x 2 mm x 0.9 mm LGA plastic package operating from a 1.71 VDC to 3.6 VDC 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.
Value proposition:
- Ideal for battery-operated and handheld applications where cost, power consumption, and size are critical
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- Small footprint: 2 mm x 2 mm x 0.9 mm LGA package
- Low current consumption: 0.9 µA in standby, 10 µA in low power, and 155 µA in high resolution modes
- Wide supply voltage range: 1.71 V to 3.6 V with internal voltage regulator
- Extended user-configurable g-ranges: ±2 g, ±4 g, ±8 g, or ±16 g
- I2C digital communication interface up to 3.4 MHz
- High-resolution wake-up function with threshold configurable down to 3.9 mg
- User-configurable output data rates from 0.781 Hz to 1600 Hz
- Improved design to virtually eliminate post reflow offset and sensitivity shift
- Highly configurable interrupt control
- RoHS / REACH compliant
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- Mobile phones
- Tablets and PCs
- Wearable devices
- IoT devices
- Gaming
- Toys
- Tags
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Application Block Diagram
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ROHM Semiconductor's KXTJ3-1057 is a tri-axis ±2g, ±4g, ±8g, or ±16g silicon micromachined accelerometer. The sense element is fabricated using Kionix's proprietary plasma micromachining process technology. Acceleration sensing is based in 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. 
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