STMicroelectronics LIS3DSHTR

Overview

LIS3DSHTR from STMicroelectronics is a MEMS digital-output three-axis accelerometer with programmable embedded state machines, ±2g to ±16g dynamically selectable full-scale range, 16-bit output resolution, I²C/SPI interface, and ultra-low-power operation (down to 3 μA in power-down mode). It serves as a motion-sensing engine in handheld user interfaces requiring autonomous pattern recognition and low-voltage battery operation.

For engineers reviewing the LIS3DSHTR datasheet, LIS3DSHTR pinout, LIS3DSHTR application, or LIS3DSHTR equivalent, this page delivers verified technical context on its embedded finite-state machine architecture, FIFO buffer management, self-test functionality, temperature-compensated offset calibration, and shock survivability up to 10,000 g - critical for pedometer, click/double-click, and impact logging designs.

Technical Context

The LIS3DSHTR implements a dual-state-machine architecture (SM1/SM2) enabling autonomous execution of motion-triggered algorithms without host processor intervention. Each state machine supports configurable timers, thresholds, and logical operators to detect complex sequences like double-tap or free-fall.

Its integrated 32-level FIFO reduces host polling overhead and supports four operating modes: bypass, FIFO, stream, and stream-to-FIFO. The device uses capacitive MEMS sensing elements with factory-trimmed sensitivity and zero-g offset, and includes an embedded temperature sensor for thermal drift compensation.

Key Specifications

Pinout & Package

LGA-16 package (3 mm × 3 mm × 1 mm), land grid array with exposed pad for thermal dissipation and mechanical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-axis MEMS accelerometer applications.

Compared with LSM6DSOXTR and ADXL345BCCZ-RL7, the LIS3DSHTR uniquely balances ultra-low-power operation (3 μA standby), autonomous state-machine processing, and robust shock tolerance - making it optimal for battery-constrained consumer motion interfaces where host MCU offload and reliability under mechanical stress are primary design drivers.

Availability

LIS3DSHTR is available at Aetrix Electronics and suitable for smartphone motion UI, wearable pedometers, gaming controllers, and industrial vibration monitors requiring stable component supply across extended temperature ranges (–40 °C to +85 °C) and long-lifecycle production.

Supply support for LIS3DSHTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in MEMS sensors, microcontrollers, power management, and automotive ICs.

The LIS3DSHTR belongs to ST's "nano" family of ultra-low-power accelerometers, designed specifically for intelligent motion sensing in space- and energy-constrained portable electronics where autonomous pattern recognition and extended battery life are critical.

FAQ

What is the function of the two interrupt pins (INT1 and INT2) on the LIS3DSHTR?

INT1 and INT2 are independently configurable event-driven outputs. INT1 typically signals data-ready status or FIFO threshold breaches, while INT2 can be assigned to distinct motion patterns (e.g., click detection or orientation change) via register programming. Both support push-pull or open-drain drive modes and can wake a host MCU from sleep, enabling precise, low-power system-level event handling without continuous polling.

How does the embedded temperature sensor improve measurement accuracy?

The on-die temperature sensor provides real-time die temperature readings (±5 °C accuracy) used by host firmware to apply calibrated offset and sensitivity corrections stored in lookup tables. This compensates for thermal drift in zero-g bias and scale factor across –40 °C to +85 °C, maintaining ±0.02 g zero-g stability and <1% full-scale error variation over temperature - critical for precision pedometer and impact logging applications.

Can the LIS3DSHTR operate autonomously without a host microcontroller?

No - the LIS3DSHTR requires initial configuration via I²C or SPI to set full-scale range, output data rate, FIFO mode, and state-machine parameters. However, once configured, its dual embedded state machines execute pre-programmed motion algorithms (e.g., double-tap, free-fall) entirely autonomously, generating interrupts without further host involvement until results are read from registers or FIFO.

What is the significance of the "ECOPACK® RoHS and 'Green' compliant" designation?

This certification confirms the LIS3DSHTR meets EU RoHS Directive 2011/65/EU (lead-free, mercury-free, cadmium-free, etc.) and ST's ECOPACK® environmental standard, which exceeds RoHS by restricting additional substances (e.g., antimony, brominated flame retardants) and mandating halogen-free molding compounds. It ensures compliance for global consumer electronics markets and supports sustainable manufacturing and end-of-life recycling requirements.