FSYNC
RESV
RESV
INT
Signal Conditioning
IAM-20381
High Performance 3-Axis MotionTracking Accelerometer
GENERAL DESCRIPTION APPLICATIONS
The IAM-20381 is a 3-axis MotionTracking accelerometer Navigation Systems Aids for Dead Reckoning
for Automotive applications in a small 3x3x0.75 mm (16- Lift Gate Motion Detections
pin LGA) package. It also features a 512-byte FIFO that Accurate Location for Vehicle to Vehicle and
can lower the traffic on the serial bus interface and Infrastructure
reduce power consumption by allowing the system 360 View Camera Stabilization
processor to burst read sensor data and then go into a Car Alarm
low-power mode. IAM-20381, with its 3-axis integration, Telematics
enables manufacturers to eliminate the costly and Insurance Vehicle Tracking
complex selection, qualification, and system level
ORDERING INFORMATION
integration of discrete devices, guaranteeing optimal
motion performance.
PART AXES TEMP RANGE PACKAGE MSL*
IAM-20381 X,Y,Z -40C to +85C 16-Pin LGA 3
The accelerometer has a user-programmable
accelerometer full-scale range of 2g, 4g, 8g, and
Denotes RoHS and Green-compliant package
16g. Factory-calibrated initial sensitivity of both sensors
* Moisture sensitivity level of the package
reduces production-line calibration requirements.
FEATURES
Other industry-leading features include on-chip 16-bit
Digital-output X-, Y-, and Z-axis accelerometer
ADCs, programmable digital filters, an embedded
with a programmable full scale range of 2g,
temperature sensor, and programmable interrupts. The
2 4g, 8g, and 16g and integrated 16-bit ADCs
device features I C and SPI serial interfaces, a VDD
User-programmable digital filters for
operating range of 1.71V to 3.6V, and a separate digital
accelerometer, and temperature sensor
IO supply, VDDIO from 1.71V to 3.6V.
Self-test
BLOCK DIAGRAM
Wake-on-motion interrupt for low power
operation of applications processor
IAM-20381
Reliability testing performed per
INT
AECQ100
Interrupt
Status
o PPAP and qualification data available
Register
CS
upon request
Slave I2C and
SA0 / SDO
Self SPI Serial
X Accel ADC FIFO
test Interface SCL / SPC
SDA / SDI
TYPICAL OPERATING CIRCUIT
User & Config
Self Registers
Y Accel
ADC
test FSYNC
Sensor
Self 1.8 3.3VDC
Registers
Z Accel
ADC
test
VDD
C2, 0.1 F C4, 2.2 F
REGOUT
Temp Sensor ADC 16 15 14
C1, 0.47 F
VDDIO GND
1.8 3.3 VDC 1 13
C3, 10 nF RESV
SCL/SPC
SCL 2 12
SDA/SDI
IAM-20381 RESV
SDA 3
11
SA0/SDO RESV
Bias & LDOs
AD0
4 10
VDDIO
CS
RESV
5 9
VDD GND REGOUT
6 7 8
TDK Corporation Document Number: DS-000216
InvenSense reserves the right to change the detail
1745 Technology Drive, San Jose, CA 95110 U.S.A Revision: 1.0
specifications as may be required to permit
+1(408) 9887339 Rev. Date: 03/29/2017
improvements in the design of its products.
www.invensense.com
IAM-20381
TABLE OF CONTENTS
General Description ............................................................................................................................................. 1
Block Diagram ...................................................................................................................................................... 1
Applications ......................................................................................................................................................... 1
Ordering Information ........................................................................................................................................... 1
Features ............................................................................................................................................................... 1
Typical Operating Circuit ...................................................................................................................................... 1
TABLE OF CONTENTS....................................................................................................................................................... 2
LIST OF FIGURES .............................................................................................................................................................. 4
LIST OF TABLES ................................................................................................................................................................ 5
1 Introduction ......................................................................................................................................................... 6
Purpose and Scope .................................................................................................................................... 6
Product Overview...................................................................................................................................... 6
Applications ............................................................................................................................................... 6
2 Features ............................................................................................................................................................... 7
Accelerometer Features ............................................................................................................................ 7
Additional Features ................................................................................................................................... 7
3 Electrical Characteristics ...................................................................................................................................... 8
Accelerometer Specifications .................................................................................................................... 8
Electrical Specifications ............................................................................................................................. 9
2
I C Timing Characterization ..................................................................................................................... 12
SPI Timing Characterization .................................................................................................................... 13
Absolute Maximum Ratings .................................................................................................................... 14
4 Applications Information ................................................................................................................................... 15
Pin Out Diagram and Signal Description ................................................................................................. 15
Typical Operating Circuit ......................................................................................................................... 16
Bill of Materials for External Components .............................................................................................. 16
Block Diagram ......................................................................................................................................... 17
Overview ................................................................................................................................................. 17
Three-Axis MEMS Accelerometer with 16-bit ADCs and Signal Conditioning ......................................... 18
2
I C and SPI Serial Communications Interfaces ........................................................................................ 18
Self-Test................................................................................................................................................... 19
Clocking ................................................................................................................................................... 19
Sensor Data Registers ......................................................................................................................... 19
FIFO ..................................................................................................................................................... 20
Interrupts ............................................................................................................................................ 20
Digital-Output Temperature Sensor ................................................................................................... 20
Bias and LDOs ..................................................................................................................................... 20
Charge Pump ...................................................................................................................................... 20
Standard Power Modes ...................................................................................................................... 20
Document Number: DS-000216 Page 2 of 44
Revision: 1.0