STMicroelectronics LIS2HH12TR

Overview

LIS2HH12TR from STMicroelectronics is an ultra-low-power, high-performance 3-axis MEMS digital accelerometer in the "pico" family, delivering ±2g/±4g/±8g full-scale measurement range, 16-bit output resolution, and configurable output data rates from 10 Hz to 800 Hz. It integrates FIFO, self-test, and an embedded temperature sensor, and is deployed in motion-controlled UIs, pedometers, and display orientation systems.

For engineers reviewing the LIS2HH12TR datasheet, LIS2HH12TR pinout, LIS2HH12TR application, or LIS2HH12TR equivalent, key selection considerations include its dual I²C/SPI interface support, 1.71–3.6 V supply with independent 1.8 V IO, -40 °C to +85 °C operation, 10000 g shock survivability, and LGA-12 (2.0 × 2.0 × 1.0 mm) package compatibility with space-constrained portable electronics.

Technical Context

The LIS2HH12TR implements a capacitive MEMS sensing element with low-noise analog front-end and dual 16-bit sigma-delta ADCs-one per axis-enabling high-resolution acceleration measurement across all full-scale ranges. Its digital signal path includes programmable high-pass and low-pass filtering, activity/inactivity detection logic, and interrupt generation on INT1/INT2 pins.

FIFO operation supports Bypass, Stream, FIFO, Stream-to-FIFO, and Bypass-to-Stream modes with up to 32-level depth, reducing host processor polling overhead. The embedded self-test applies electrostatic force to verify mechanical integrity without external stimulus, and the integrated temperature sensor provides calibrated readings with ±3 °C accuracy over the operating range.

Key Specifications

Pinout & Package

LGA-12 (2.0 mm × 2.0 mm × 1.0 mm) land grid array package with bottom-side exposed pad for thermal and mechanical stability; RoHS-compliant, ECOPACK® green packaging.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-axis ultra-low-power accelerometer applications.

Compared with LIS2DH12TR, LIS2HH12TR offers lower power and integrated temperature sensing at identical pinout; versus BMI160, it trades gyroscope capability for smaller size, lower cost, and simpler integration in pure-acceleration use cases.

Availability

LIS2HH12TR is available at Aetrix Electronics and suitable for smartphone display orientation, wearable pedometers, gaming motion controllers, and industrial vibration monitors requiring stable component supply across multi-year production cycles.

Supply support for LIS2HH12TR 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, designing and manufacturing microcontrollers, sensors, power ICs, and analog components for industrial, automotive, and consumer markets.

The LIS2HH12TR belongs to ST's "pico" ultra-low-power MEMS accelerometer product line, engineered specifically for battery-operated portable electronics demanding high performance in minimal form factor and energy budget.

FAQ

What communication interfaces does the LIS2HH12TR support?

The LIS2HH12TR supports both I²C and SPI digital interfaces on shared pins, selected via the CS pin state. I²C operates at standard/fast mode (up to 400 kHz), while SPI supports 4-wire and 3-wire configurations with clock speeds up to 10 MHz. No external configuration resistors or jumpers are required - interface mode is purely logic-level controlled.

How does the embedded FIFO reduce system power consumption?

The 32-level FIFO buffers XYZ acceleration data autonomously, allowing the host MCU to remain in deep-sleep mode until FIFO threshold or watermark interrupts occur. At 12.5 Hz ODR, this cuts host wake-ups from 12.5 times/sec to once every ~2.5 seconds (for full FIFO), reducing average system current by up to 35% in pedometer applications.

Can the LIS2HH12TR perform click/double-click detection without host processor involvement?

Yes - dedicated hardware registers (IG_CFG1, IG_THS_X1/Y1/Z1, IG_DUR1) configure tap detection thresholds, timing windows, and axis sensitivity. Once enabled, the sensor generates INT1 pulses on recognized taps, eliminating the need for host-side signal processing or continuous sampling.

What is the purpose of the separate Vdd_IO supply pin?

Vdd_IO powers only the digital I/O circuitry (I²C/SPI interface, interrupt drivers), isolating it from analog core supply noise. This allows direct connection to 1.8 V logic families without level shifters while preserving ADC accuracy and reducing EMI coupling into sensitive analog paths.