on October 30th 4,141

LIS3DHTR Sensor Overview Features and Practical Uses

The LIS3DHTR accelerometer is a powerful sensor that helps detect movement in three dimensions, making it perfect for a range of smart devices. This article covers its features, applications, and how to use it with various platforms.

Catalog

Overview of the LIS3DHTR Accelerometer

The LIS3DHTR is a three-axis linear accelerometer known for its high performance and low power use. Designed for applications where both accuracy and battery life are valued, this sensor has modes that let it operate efficiently while conserving energy. Its I2C and SPI digital output interfaces make it versatile for various devices, allowing smooth integration into electronic systems. With this sensor, you can detect movement across three dimensions, making it useful for applications ranging from mobile devices to wearable tech. Its design also includes several modes that help it adjust its performance based on your needs, enabling better control over power use and accuracy.

LIS3DHTR CAD Model

LIS3DHTR Symbol

LIS3DHTR Footprint

LIS3DHTR 3D Model

Pin Configuration for LIS3DHTR

Pin Number	Name	Function
1	Vdd_IO	Power supply for I/O pins
2	NC	Not connected
3	NC	Not connected
4	SCL / SPC	I²C serial clock (SCL) / SPI serial port clock (SPC)
5	GND	0 V supply
6	SDA / SDI / SDO	I²C serial data (SDA) / SPI serial data input (SDI) / 3-wire interface serial data output (SDO)
7	SDO / SA0	SPI serial data output (SDO) / I²C less significant bit of the device address (SA0)
8	CS	SPI enable / I²C/SPI mode selection: 1: SPI idle mode / I²C communication enabled, 0: SPI communication mode / I²C disabled
9	INT2	Inertial interrupt 2
10	RES	Connect to GND
11	INT1	Inertial interrupt 1
12	GND	0 V supply
13	ADC3	Analog-to-digital converter input 3
14	Vdd	Power supply
15	ADC2	Analog-to-digital converter input 2
16	ADC1	Analog-to-digital converter input 1

LIS3DHTR Block Diagram

LIS3DHTR Specifications

Technical specifications, features, characteristics, and components with comparable specifications of STMicroelectronics LIS3DHTR

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 7 months ago)
Factory Lead Time	16 Weeks
Contact Plating	Gold
Mounting Type	Surface Mount
Package / Case	16-VFLGA
Surface Mount	YES
Number of Pins	16
Usage Level	Industrial grade
Operating Temperature	-40°C ~ 85°C TA
Packaging	Tape & Reel (TR)
JESD-609 Code	e4
Part Status	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Number of Terminations	16
ECCN Code	EAR99
Type	Digital
HTS Code	8542.39.00.01
Voltage - Supply	1.71V ~ 3.6V
Terminal Position	Bottom
Terminal Form	Butt
Peak Reflow Temperature (°C)	260
Number of Functions	1
Supply Voltage	2.5V
Terminal Pitch	0.5mm
Depth	3mm
Time@Peak Reflow Temperature-Max (s)	30
Base Part Number	LIS3
Pin Count	16
Output Type	I2C, SPI
Operating Supply Voltage	2.5V
Interface	I2C, SPI
Operating Supply Current	11μA
Resolution	2 B
Sensor Type	3 Axis
Max Supply Voltage (DC)	3.6V
Min Supply Voltage (DC)	1.71V
Axis	X, Y, Z
Acceleration Range	±2g, 4g, 8g, 16g
Features	Adjustable Bandwidth, Selectable Scale, Temperature Sensor
Sensitivity (LSB/g)	1000 (±2g) ~ 83 (±16g)
Height	1mm
Length	3mm
Width	3mm
REACH SVHC	No SVHC
Radiation Hardening	No
RoHS Status	ROHS3 Compliant
Lead Free	Lead Free

Key Features of LIS3DHTR

Wide Voltage Range

This sensor operates with a flexible voltage range, from 1.71 V to 3.6 V. This flexibility allows it to fit into a variety of power configurations without needing additional converters, making it easy to use across different devices and setups.

Independent IO Supply

An independent IO supply, set at 1.8 V, ensures compatibility with other low-voltage devices. This feature enables smooth communication and data sharing with a broad range of microcontrollers and processing units.

Ultra-Low Power Consumption

With power consumption as low as 2 μA, the LIS3DHTR offers a good choice for battery-powered applications. You can use it for extended periods without draining the battery, making it practical for wearables, IoT devices, and portable electronics.

Dynamic Full-Scale Range

The sensor provides selectable full-scale ranges of ±2g, ±4g, ±8g, and ±16g. This flexibility allows you to adjust the sensitivity depending on your specific application needs, whether you need precise measurements for smaller movements or broader range detection.

I2C/SPI Digital Interface

Equipped with both I2C and SPI interfaces, the LIS3DHTR is compatible with various microcontroller platforms. This dual interface option allows you to choose the protocol that best suits your design, ensuring easier integration and adaptability.

High-Resolution 16-Bit Data Output

The sensor outputs data in 16-bit resolution, which enhances accuracy in readings. This level of precision ensures more reliable data for applications requiring precise movement detection or environmental monitoring.

Programmable Interrupts

Two programmable interrupt generators allow for features like free-fall and motion detection. This capability provides real-time response to movement changes, making it ideal for applications like fall detection and motion-triggered actions.

Orientation Detection

With 6D/4D orientation detection, the sensor can determine its position in space. This feature is particularly useful for applications where knowing the device’s orientation—whether it’s face up, down, or tilted—is necessary for functionality.

Built-In Temperature Sensor

A built-in temperature sensor allows the LIS3DHTR to monitor its own temperature, which helps maintain consistent performance across varying environmental conditions.

Self-Test Functionality

The self-test feature enables you to verify the sensor’s functionality on demand. This is helpful in applications requiring regular checks to confirm that the sensor is working accurately.

FIFO Data Buffer

The embedded 32-level FIFO buffer allows data to be stored temporarily, which reduces the load on your processor and ensures efficient data handling. It’s especially useful in situations where real-time processing might not be possible.

High Shock Survivability

With a shock tolerance up to 10000 g, this sensor is resilient to high-impact forces, making it reliable in applications exposed to sudden shocks or impacts.

Environmentally Friendly Compliance

The LIS3DHTR is certified under ECOPACK® and RoHS standards, meeting environmental guidelines for safer electronic waste disposal. Its compliance makes it a sustainable option for eco-conscious projects.

Operational Modes of the LIS3DHTR

The LIS3DH provides three modes to choose from: high-resolution, normal, and low-power. Here’s a quick guide on selecting each operational mode.

Operating Mode	CTRL_REG1[3] (LPen bit)	CTRL_REG4[3] (HR bit)	BW [Hz]	Turn-on Time [ms]	So @ ±2g [mg/digit]
Low-power mode (8-bit data output)	1	0	ODR/2	1	16
Normal mode (10-bit data output)	0	0	ODR/2	1.6	4
High-resolution mode (12-bit data output)	0	1	ODR/9	7/ODR	1
Not allowed	1	1	--	--	--

Applications of the LIS3DHTR Accelerometer

Motion-Activated Functions

This accelerometer is suitable for triggering functions based on movement. Whether used in smart lights, displays, or other responsive devices, it can help initiate actions based on specific motion triggers.

Free-Fall Detection

The LIS3DHTR can detect free-fall events, which is valuable for protective systems. For example, in devices where sudden drops might damage components, the sensor can help signal an immediate shutdown to protect hardware.

Click and Double-Click Recognition

This sensor can detect single and double-click movements, allowing users to interact with devices through simple taps. This feature can be particularly useful in wearable devices or handheld controllers.

Power-Saving for Portable Devices

Its low-power modes and motion detection make this accelerometer ideal for saving energy in portable electronics. It can be programmed to enter sleep mode when the device is inactive, conserving battery life.

Step Counting in Pedometers

The sensor’s ability to detect movement across different axes makes it a good fit for step counters. By tracking steps, it contributes to health and fitness applications, giving users accurate data on their daily activity.

Screen Orientation Adjustment

The LIS3DHTR can detect orientation changes, making it useful in adjusting display orientation automatically. This application is common in smartphones, tablets, and other devices with screens that need to rotate based on user positioning.

Gaming and Virtual Reality Control

Its ability to track movement makes this accelerometer suitable for gaming and VR devices. It enhances the user experience by adding responsive, immersive control based on the user’s movements.

Impact Recognition and Logging

The LIS3DHTR can register sudden impacts, which can be used to log and analyze events in applications like vehicle data recorders or impact-sensitive machinery.

Vibration Monitoring and Correction

In devices sensitive to vibrations, this accelerometer helps monitor and adjust for any external disturbances. This capability is especially beneficial in machinery that requires stability, where detecting and compensating for vibrations ensures smooth operation.

LIS3DHTR Mechanical Specifications

Vdd = 2.5 V, T = 25 °C unless otherwise noted (c)

Symbol	Parameter	Test Conditions	Min.	Typ.	Max.	Unit
FS	Measurement range	FS bit set to 00	±2.0			g
		FS bit set to 01	±4.0			g
		FS bit set to 10	±8.0			g
		FS bit set to 11	±16.0			g
	Sensitivity	FS bit set to 00; High-resolution mode		1		mg/digit
		FS bit set to 00; Normal mode		4		mg/digit
		FS bit set to 00; Low-power mode		16		mg/digit
		FS bit set to 01; High-resolution mode		2		mg/digit
		FS bit set to 01; Normal mode		8		mg/digit
		FS bit set to 01; Low-power mode		32		mg/digit
		FS bit set to 10; High-resolution mode		4		mg/digit
		FS bit set to 10; Normal mode		16		mg/digit
		FS bit set to 10; Low-power mode		64		mg/digit
		FS bit set to 11; High-resolution mode		12		mg/digit
		FS bit set to 11; Normal mode		48		mg/digit
		FS bit set to 11; Low-power mode		192		mg/digit
TCSO	Sensitivity change vs temperature	FS bit set to 00		0.01		%/°C
TyOff	Typical zero-g level offset accuracy	FS bit set to 00		±40		mg
TCOFF	Zero-g level change vs temperature	Max delta from 25 °C			±0.5	mg/°C
An	Acceleration noise density	FS bit set to 00, High-Resolution mode	220			µg/√Hz
Vst	Self-test output change	X-axis; FS bit set to 00	17	360	810	LSB
		Y-axis; FS bit set to 00	17	360	810	LSB
Top	Operating temperature range		-40		85	°C

Temperature Sensor Properties of LIS3DHTR

Vdd = 2.5 V, T = 25 °C unless otherwise noted (c)

Symbol	Parameter	Test Condition	Min.	Typ.	Max.	Unit
TSDr	Temperature sensor output change vs temperature			1		digit/°C
TODR	Temperature refresh rate			ODR		Hz
Top	Operating temperature range		-40		85	°C

Electrical Properties of LIS3DHTR

Vdd = 2.5 V, T = 25 °C unless otherwise noted (c)

Symbol	Parameter	Test Conditions	Min.	Typ.	Max.	Unit
Vdd	Supply voltage		1.71	2.5	3.6	V
Vdd_IO	I/O pins supply voltage		1.71		Vdd + 0.1	V
Idd	Current consumption in normal mode	50 Hz ODR		11		µA
	Current consumption in normal mode	1 Hz ODR		2		µA
IddLP	Current consumption in low-power mode	50 Hz ODR		1		µA
IddPdn	Current consumption in power-down mode			0.5		µA
VIH	Digital high-level input voltage		0.8 * Vdd_IO			V
VIL	Digital low-level input voltage				0.2 * Vdd_IO	V
VOH	High-level output voltage		0.9 * Vdd_IO			V
VOL	Low-level output voltage				0.1 * Vdd_IO	V
BW	System bandwidth			ODR/2		Hz
Top	Operating temperature range		-40		85	°C

Dimensions of the LIS3DHTR

About the Manufacturer, STMicroelectronics

STMicroelectronics is a well-known company in the semiconductor industry, recognized for producing a wide range of microelectronics products. By combining deep expertise in silicon design, manufacturing strength, and a broad network of technology partners, they stay at the forefront of innovation. STMicroelectronics plays a big role in creating system-on-chip (SoC) technologies that support many modern electronic devices. The company's solutions are found in diverse applications, providing both reliability and adaptability, which meet the needs of today’s fast-evolving tech landscape.

Datasheet PDF

LIS3DHTR Datasheet:

LIS3DHTR.pdf