KMX61-1021-PR

KMX61-1021-PR Datasheet

KMX61-1021 Rev. July 14

Part	Datasheet
KMX61-1021-PR	KMX61-1021-PR (pdf)

Related Parts	Information
KMX61-1021-FR	KMX61-1021-FR

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Digital Tri-axis Magnetometer/ Tri-axis Accelerometer Specifications PART NUMBER: Product Description KMX61 is a 6 Degrees-of-Freedom inertial sensor system that features 14-bit digital outputs accessed through I2C communication. The KMX61 sensor consists of a tri-axial magnetometer plus a tri-axial accelerometer coupled with an ASIC. It is packaged in a 3x3x0.9mm Land Grid Array LGA package. The ASIC is realized in standard 0.18um CMOS technology and features flexible user programmable ±2g/±4g/±8g full scale range for the accelerometer. Accelerometer and Magnetometer data can be accumulated in an internal 512 byte FIFO buffer and transmitted to the application processor. Acceleration sensing is based on the principle of a differential capacitance arising from acceleration-induced motion of the sense element, which utilizes common mode cancellation to decrease errors from process variation, temperature, and environmental stress. Capacitance changes are amplified and converted into digital signals which are processed by a dedicated digital signal processing unit. The digital signal processor applies filtering, bias and sensitivity adjustment, as well as temperature compensation. Magnetic sensing is based on the principle of magnetic impedance. The magnetic sensor detects very small magnetic fields by passing an electric pulse through a special electron spin aligned amorphous wire. Due to the high Curie temperature of the wire, the sensor’s thermal performance shows excellent stability. Noise performance is excellent with bias stability over temperature. Bias errors resulting from assembly can be trimmed digitally by the user. These sensors can accept supply voltages between 1.8V and 3.3V, and digital communication voltages between and 3.3V. 36 Thornwood Dr. Ithaca, NY 14850 tel 607-257-1080 fax:607-257-1146 - Kionix Confidential 2014 Kionix All Rights Reserved Page 1 of 51 Digital Tri-axis Magnetometer/ Tri-axis Accelerometer Specifications PART NUMBER: Table of Contents PRODUCT DESCRIPTION TABLE OF FUNCTIONAL DIAGRAM PRODUCT TABLE 5 TABLE ACCELEROMETER 7 TABLE 9 KMX61 TRANSITION TIMING DIAGRAM 10 TABLE TRANSITION 10 KMX61 START UP 11 TABLE START UP TIME 11 KMX61 I2C TIMING DIAGRAM 12 TABLE I2C TIMING FAST MODE 12 TABLE 13 APPLICATION SCHEMATIC 14 TABLE KMX61 PIN DESCRIPTIONS 14 PACKAGE DIMENSIONS AND ORIENTATION 15 ORIENTATION 16 BOARD 16 KMX61 DIGITAL INTERFACE I2C SERIAL 17 I2C OPERATION 18 WRITING TO A KMX61 8-BIT 19 READING FROM A KMX61 8-BIT 19 DATA TRANSFER SEQUENCES 20 HS-MODE 21 POWER OFF MODE 22 INITIAL 22 STAND-BY MODE 23 SLEEP MODE 23 ENABLE MODE 23 KMX61 EMBEDDED REGISTERS MAGNETOMETER 26 36 Thornwood Dr. Ithaca, NY 14850 tel 607-257-1080 fax:607-257-1146 - Kionix Confidential 2014 Kionix All Rights Reserved Page 2 of 51 Digital Tri-axis Magnetometer/ Tri-axis Accelerometer Specifications PART NUMBER: ACCELEROMETER OUTPUTS 27 TEMPERATURE OUTPUT 28 REGISTER 29 30 STATUS_REG 30 31 ACCEL_OUT_HPF 31 32 CTRL_REG1 33 CTRL_REG2 34 INC1 36 INC2 36 INC3 37 COTR STR 38 WUF_THRESH ATH 38 BTS_THRESH 38 SELF_TEST 39 40 41 BUF_CLEAR 41 BUF_STATUS 41 42 SAMPLE BUFFER FEATURE DESCRIPTION FIFO Mode 43 Stream 43 Trigger 44 FILO Mode 44 Buffer Operation 44 36 Thornwood Dr. Ithaca, NY 14850 tel 607-257-1080 fax:607-257-1146 - Kionix Confidential 2014 Kionix All Rights Reserved Page 3 of 51 Functional Diagram

PDF Datasheet Preview

Digital Tri-axis Magnetometer/ Tri-axis Accelerometer Specifications

PART NUMBER:

Product Description

KMX61 is a 6 Degrees-of-Freedom inertial sensor system that features 14-bit digital outputs accessed through I2C communication. The KMX61 sensor consists of a tri-axial magnetometer plus a tri-axial accelerometer coupled with an ASIC. It is packaged in a 3x3x0.9mm Land Grid Array LGA package. The ASIC is realized in standard 0.18um CMOS technology and features flexible user programmable ±2g/±4g/±8g full scale range for the accelerometer. Accelerometer and Magnetometer data can be accumulated in an internal 512 byte FIFO buffer and transmitted to the application processor.

Acceleration sensing is based on the principle of a differential capacitance arising from acceleration-induced motion of the sense element, which utilizes common mode cancellation to decrease errors from process variation, temperature, and environmental stress. Capacitance changes are amplified and converted into digital signals which are processed by a dedicated digital signal processing unit. The digital signal processor applies filtering, bias and sensitivity adjustment, as well as temperature compensation.

Magnetic sensing is based on the principle of magnetic impedance. The magnetic sensor detects very small magnetic fields by passing an electric pulse through a special electron spin aligned amorphous wire. Due to the high Curie temperature of the wire, the sensor’s thermal performance shows excellent stability.

Noise performance is excellent with bias stability over temperature. Bias errors resulting from assembly can be trimmed digitally by the user. These sensors can accept supply voltages between 1.8V and 3.3V, and digital communication voltages between and 3.3V.
36 Thornwood Dr. Ithaca, NY 14850 tel 607-257-1080 fax:607-257-1146 -

Kionix Confidential
2014 Kionix All Rights Reserved

Page 1 of 51

Digital Tri-axis Magnetometer/ Tri-axis Accelerometer Specifications

PART NUMBER:

Table of Contents

PRODUCT DESCRIPTION

TABLE OF

FUNCTIONAL DIAGRAM

PRODUCT

TABLE 5 TABLE ACCELEROMETER 7 TABLE 9 KMX61 TRANSITION TIMING DIAGRAM 10 TABLE TRANSITION 10 KMX61 START UP 11 TABLE START UP TIME 11 KMX61 I2C TIMING DIAGRAM 12 TABLE I2C TIMING FAST MODE 12 TABLE 13 APPLICATION SCHEMATIC 14 TABLE KMX61 PIN DESCRIPTIONS 14 PACKAGE DIMENSIONS AND ORIENTATION 15 ORIENTATION 16 BOARD 16

KMX61 DIGITAL INTERFACE

I2C SERIAL 17 I2C OPERATION 18 WRITING TO A KMX61 8-BIT 19 READING FROM A KMX61 8-BIT 19 DATA TRANSFER SEQUENCES 20 HS-MODE 21

POWER

OFF MODE 22 INITIAL 22 STAND-BY MODE 23 SLEEP MODE 23 ENABLE MODE 23

KMX61 EMBEDDED REGISTERS

MAGNETOMETER 26
36 Thornwood Dr. Ithaca, NY 14850 tel 607-257-1080 fax:607-257-1146 -

Kionix Confidential
2014 Kionix All Rights Reserved

Page 2 of 51

Digital Tri-axis Magnetometer/ Tri-axis Accelerometer Specifications

PART NUMBER:

ACCELEROMETER OUTPUTS 27 TEMPERATURE OUTPUT 28

REGISTER
29 30 STATUS_REG 30 31 ACCEL_OUT_HPF 31 32 CTRL_REG1 33 CTRL_REG2 34 INC1 36 INC2 36 INC3 37 COTR STR 38 WUF_THRESH ATH 38 BTS_THRESH 38 SELF_TEST 39 40 41 BUF_CLEAR 41 BUF_STATUS 41 42

SAMPLE BUFFER FEATURE DESCRIPTION

FIFO Mode 43 Stream 43 Trigger 44 FILO Mode 44 Buffer Operation 44
36 Thornwood Dr. Ithaca, NY 14850 tel 607-257-1080 fax:607-257-1146 -

Kionix Confidential
2014 Kionix All Rights Reserved

Page 3 of 51

Functional Diagram

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Datasheet ID: KMX61-1021-PR 644873