KXTI9-1001 datasheet(1/54 Pages) ETC2

Part #	KXTI9-1001

Description	2g/4g/8g Tri-axis Digital Accelerometer Specifications

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± 2g / 4g / 8g Tri-axis Digital

Accelerometer Specifications

PART NUMBER:

KXTI9-1001

Rev. 2

Jul-2011

36 Thornwood Dr. – Ithaca, NY 14850

tel: 607-257-1080 – fax:607-257-1146

438-2322-1107191455

www.kionix.com - info@kionix.com

Page 1 of 54

Product Description

The KXTI9 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. 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. I

2C digital protocol is used to communicate with the chip to configure and check for updates to

the orientation, Directional Tap

TM detection and activity monitoring algorithms.

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