Accelerometer. IAM-20381 Datasheet

IAM-20381 Datasheet PDF


Part

IAM-20381

Description

High Performance 3-Axis MotionTracking Accelerometer

Manufacture

TDK

Page 30 Pages
Datasheet
Download IAM-20381 Datasheet


IAM-20381 Datasheet
IAM-20381
High Performance 3-Axis MotionTracking Accelerometer
GENERAL DESCRIPTION
The IAM-20381 is a 3-axis MotionTracking accelerometer
for Automotive applications in a small 3x3x0.75 mm (16-
pin LGA) package. It also features a 512-byte FIFO that
can lower the traffic on the serial bus interface and
reduce power consumption by allowing the system
processor to burst read sensor data and then go into a
low-power mode. IAM-20381, with its 3-axis integration,
enables manufacturers to eliminate the costly and
complex selection, qualification, and system level
integration of discrete devices, guaranteeing optimal
motion performance.
The accelerometer has a user-programmable
accelerometer full-scale range of ±2g, ±4g, ±8g, and
±16g. Factory-calibrated initial sensitivity of both sensors
reduces production-line calibration requirements.
Other industry-leading features include on-chip 16-bit
ADCs, programmable digital filters, an embedded
temperature sensor, and programmable interrupts. The
device features I2C and SPI serial interfaces, a VDD
operating range of 1.71V to 3.6V, and a separate digital
IO supply, VDDIO from 1.71V to 3.6V.
BLOCK DIAGRAM
Self
test
X Accel
Self Y Accel
test
Self
test
Z Accel
ADC
ADC
ADC
Temp Sensor
ADC
IAM-20381
Interrupt
Status
Register
FIFO
User & Config
Registers
Sensor
Registers
Slave I2C and
SPI Serial
Interface
INT
CS
SA0 / SDO
SCL / SPC
SDA / SDI
FSYNC
Bias & LDOs
VDD
GND REGOUT
APPLICATIONS
• Navigation Systems Aids for Dead Reckoning
• Lift Gate Motion Detections
• Accurate Location for Vehicle to Vehicle and
Infrastructure
• 360º View Camera Stabilization
• Car Alarm
• Telematics
• Insurance Vehicle Tracking
ORDERING INFORMATION
PART
IAM-20381
AXES TEMP RANGE
X,Y,Z -40°C to +85°C
PACKAGE
16-Pin LGA
MSL*
3
†Denotes RoHS and Green-compliant package
* Moisture sensitivity level of the package
FEATURES
• Digital-output X-, Y-, and Z-axis accelerometer
with a programmable full scale range of ±2g,
±4g, ±8g, and ±16g and integrated 16-bit ADCs
• User-programmable digital filters for
accelerometer, and temperature sensor
• Self-test
• Wake-on-motion interrupt for low power
operation of applications processor
• Reliability testing performed per
AEC–Q100
o PPAP and qualification data available
upon request
TYPICAL OPERATING CIRCUIT
1.8 – 3.3VDC
C2, 0.1 µF
VDD
C4, 2.2 µF
REGOUT
16 15 14
1.8 – 3.3 VDC
C3, 10 nF
VDDIO
VDDIO
1
SCL SCL/SPC 2
SDA SDA/SDI 3
AD0 SA0/SDO 4
CS 5
IAM-20381
GND
13
RESV
12
11 RESV
10 RESV
9 RESV
678
C1, 0.47 µF
InvenSense reserves the right to change the detail
specifications as may be required to permit
improvements in the design of its products.
TDK Corporation
1745 Technology Drive, San Jose, CA 95110 U.S.A
+1(408) 988–7339
www.invensense.com
Document Number: DS-000216
Revision: 1.0
Rev. Date: 03/29/2017

IAM-20381 Datasheet
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
I2C 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
I2C 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
Revision: 1.0
Page 2 of 44


Features Datasheet pdf IAM-20381 High Performance 3-Axis Motion Tracking Accelerometer GENERAL DESCRIP TION The IAM-20381 is a 3-axis MotionTr acking accelerometer for Automotive app lications in a small 3x3x0.75 mm (16pin LGA) package. It also features a 512-b yte FIFO that can lower the traffic on the serial bus interface and reduce pow er consumption by allowing the system p rocessor to burst read sensor data and then go into a low-power mode. IAM-2038 1, with its 3-axis integration, enables manufacturers to eliminate the costly and complex selection, qualification, a nd system level integration of discrete devices, guaranteeing optimal motion p erformance. The accelerometer has a use r-programmable accelerometer full-scale range of ±2g, ±4g, ±8g, and ±16g. Factory-calibrated initial sensitivity of both sensors reduces production-line calibration requirements. Other indust ry-leading features include on-chip 16- bit ADCs, programmable digital filters, an embedded temperature sensor, and programmable interrupts. The d.
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