Product Summary

The KXSD9 is a tri-axis silicon micromachined accelerometer with a user selectable full-scale output range of ±2g, ±4g, ±6g or ±8g. The KXSD9 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 KXSD9 is delivered in a 3 x 3 x 0.9 mm LGA plastic package operating from a 1.8 to 3.6V DC supply. Either I2C or SPI interfaces can be used to communicate to the chip to trigger A/D conversions or manage power consumption.

Parametrics

KXSD9 absolute maximum ratings: (1)Supply Voltage (Vdd):-0.3V to 6.0V; (2)Operating Temperature Range:-40℃ to 85℃ ; (3)Storage Temperature Range:-55℃ to 150℃; (4)Mech. Shock (powered and unpowered):5000g for 0.5ms, 10000g for 0.2ms ; (5)ESD and HBM:2000V.

Features

KXSD9 features: (1)Power up digital accelerometer; (2)nCS low to select; (3)Write operational mode commands to the 8-bit control registers; (4)nCS high for at least 130nS; (5)nCS low to select; (6)Send convert axis command:There should be a minimum of 200μs between the command byte and readback bytes in order to give the A/D conversion adequate time to complete; (7)The 12-bit A/D data is read to the second and third SDO bytes; (8)After receiving the last byte of required data, return nCS high for at least 130nS to reset the autoincrement; (9)Repeat data read cycle; (10)Recommend reading X-axis, Y-axis, Z-axis, and the three Control Registers for each read cycle to verify the mode selections and status.

Diagrams

KXSD9 block diagram