IAM-20680HT
High Performance Automotive 6-Axis MotionTracking Device
InvenSense, Inc. reserves the right to change
specifications and information herein without notice
unless the product is in mass production and the
datasheet has been designated by InvenSense in
writing as subject to a specified Product / Process
Change Notification Method regulation.
InvenSense, Inc.
1745 Technology Drive, San Jose, CA 95110 U.S.A
+1(408) 988–7339
www.invensense.com
Document Number: DS-000481
Revision: 1.0
Rev. Date: 10/21/2021
GENERAL DESCRIPTION
The IAM-20680HT is a 6-axis MotionTracking device for
Automotive non-safety applications that combines a 3-
axis gyroscope and a 3-axis accelerometer in a thin
3x3x0.75mm
3
(16-pin LGA) package. It also features a
4096-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-20680HT, with its 6-axis
integration, enables manufacturers to eliminate the
costly and complex selection, qualification, and system
level integration of discrete devices, guaranteeing
optimal motion performance.
The gyroscope has a programmable full-scale range of
±250 dps, ±500 dps, ±1000 dps and ±2000 dps. 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 two programmable interrupts.
The device features I
2
C 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
APPLICATIONS
IAM-20680HT address a wide range of Automotive
applications, including but not limited to:
• Navigation Systems Aids for Dead Reckoning
• Lift Gate Motion Detection
• Accurate Location for Vehicle to Vehicle and
Infrastructure
• View Camera Stabilization and Vision Systems
• Head-up display (HUD) and augmented reality HUD
• Car Alarm
• Telematics
• Insurance Vehicle Tracking
ORDERING INFORMATION
PART
AXES
PACKAGE
MSL*
IAM-20680HT
†
X, Y, Z
16-Pin LGA
3
†Denotes RoHS and Green-compliant package
* Moisture sensitivity level of the package
FEATURES
• Digital-output X-, Y-, and Z-axis angular rate sensors
(gyroscopes) with a user-programmable full-scale
range of ±250dps, ±500dps, ±1000dps, and
±2000dps, integrated 16-bit ADCs.
• Digital-output X-, Y-, and Z-axis accelerometer with
a user-programmable full-scale range of ±2g, ±4g,
±8g, and ±16g and integrated 16-bit ADCs
• User-programmable digital filters for gyroscope,
accelerometer, and temperature sensor
• Embedded Self-test
• Two interrupt lines
• Wake-on-Motion interrupt for low-power operation
of applications processor
• Reliability testing performed according to
AEC–Q100: PPAP and qualification report available
upon request
• Final test at -40°C, 25°C, and +105°C
TYPICAL OPERATING CIRCUIT
IAM-20680HT
Document Number: DS-000481 Page 2 of 53
Revision: 1.0
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 .............................................................................................................................................................. 5
LIST OF TABLES ................................................................................................................................................................ 6
1 Introduction ......................................................................................................................................................... 7
Purpose and Scope .................................................................................................................................... 7
Product Overview...................................................................................................................................... 7
Applications ............................................................................................................................................... 7
2 Features ............................................................................................................................................................... 8
Gyroscope Features .................................................................................................................................. 8
Accelerometer Features ............................................................................................................................ 8
Additional Features ................................................................................................................................... 8
3 Electrical Characteristics ...................................................................................................................................... 9
Gyroscope Specifications .......................................................................................................................... 9
Accelerometer Specifications .................................................................................................................. 10
Electrical Specifications ........................................................................................................................... 11
I
2
C Timing Characterization ..................................................................................................................... 14
SPI Timing Characterization .................................................................................................................... 15
Absolute Maximum Ratings .................................................................................................................... 16
Thermal Information ............................................................................................................................... 16
4 Applications Information ................................................................................................................................... 17
Pin Out Diagram and Signal Description ................................................................................................. 17
Typical Operating Circuit ......................................................................................................................... 18
Bill of Materials for External Components .............................................................................................. 18
Block Diagram ......................................................................................................................................... 19
Overview ................................................................................................................................................. 19
Three-Axis MEMS Gyroscope with 16-bit ADCs and Signal Conditioning ............................................... 20
Three-Axis MEMS Accelerometer with 16-bit ADCs and Signal Conditioning ......................................... 20
I
2
C and SPI Serial Communications Interfaces ........................................................................................ 20
Self-Test................................................................................................................................................... 21
Clocking ................................................................................................................................................... 21
Sensor Data Registers ............................................................................................................................. 21
FIFO ......................................................................................................................................................... 22
Interrupts ................................................................................................................................................ 22