STMicroelectronics LIS302SGTR

Overview

LIS302SGTR from STMicroelectronics is a 3-axis ±2g analog-output MEMS accelerometer in the "piccolo" family, designed for motion sensing in space-constrained portable systems. It delivers ratiometric analog outputs per axis (Voutx/Vouty/Voutz), supports multiplexed single-pin output via S0/S1 control, operates from 3.0–3.6 V, consumes 0.65 mA in active mode, and features embedded self-test and power-down mode. It is used in mobile terminal free-fall detection and gaming input devices.

For engineers reviewing the LIS302SGTR datasheet, LIS302SGTR pinout, LIS302SGTR application, or LIS302SGTR equivalent, key selection criteria include its ±2 g full-scale range, 32 kΩ output impedance, 2.0 kHz resonant frequency, ratiometric zero-g level (Vdd/2 ±6%), and LGA-14 (3×5×0.9 mm) package compatibility with high-shock environments up to 10,000 g.

Technical Context

The LIS302SGTR integrates a surface-micromachined capacitive sensing element with a CMOS interface IC featuring correlated double sampling (CDS) to suppress offset and 1/f noise. Its three independent analog channels feed sample-and-hold circuits before routing to dedicated output pins or a shared multiplexed output (Vout).

Output scaling is fully ratiometric: sensitivity (0.145×Vdd ±5% V/g) and zero-g level (Vdd/2 ±6% V) track supply voltage changes, enabling error cancellation in ADC chains. Bandwidth is programmable via external load capacitance (Cload ≥2.5 nF) across each output, with cutoff f_t = 5 µF / Cload (Hz), supporting anti-aliasing down to 1 Hz.

Key Specifications

Pinout & Package

Package: LGA-14 (3 mm × 5 mm × 0.9 mm), RoHS-compliant ECOPACK® thin land grid array with exposed die pad (not electrically connected). Operates from –40 °C to +85 °C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-axis analog-output MEMS accelerometer applications.

Compared with ADXL322ACPZ-RL7 and LIS331DLHTR, the LIS302SGTR uniquely combines ratiometric analog outputs, integrated multiplexing, and self-test in a 3×5 mm LGA package-enabling minimal-component motion sensing where analog ADC interfacing and functional verification are critical.

Availability

LIS302SGTR is available at Aetrix Electronics and suitable for mobile terminal free-fall detection, gaming motion input, appliance tilt sensing, and robotics inertial monitoring requiring stable component supply and long-lifecycle support.

Supply support for LIS302SGTR 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, power management, microcontrollers, and automotive ICs.

The LIS302SGTR belongs to ST's "piccolo" family of miniaturized, low-power motion sensors, designed specifically for cost-sensitive, space-constrained portable electronics requiring analog interface simplicity and robust mechanical reliability.

FAQ

What is the purpose of the Aux_in pin on the LIS302SGTR?

The Aux_in pin serves as an auxiliary analog input that can be routed to the multiplexed Vout pin when S1 and S0 are both high (11 state). This allows integration of a secondary analog sensor-such as a temperature or ambient light sensor-without adding extra ADC channels, reducing system component count and PCB complexity.

How does the ratiometric output behavior affect ADC design?

Because zero-g level and sensitivity scale linearly with Vdd, using the same supply for both LIS302SGTR and the ADC's reference voltage cancels supply-induced gain and offset errors. This eliminates the need for precision voltage references or post-conversion calibration, simplifying analog front-end design and improving long-term measurement stability.

Can the LIS302SGTR operate reliably after exposure to mechanical shock?

Yes-the LIS302SGTR is qualified for 10,000 g mechanical shock (0.1 ms duration) while powered and 3000 g (0.5 ms) when unpowered. Its monolithic MEMS structure and LGA packaging ensure continued functionality in drop-prone applications like smartphones and handheld tools without recalibration.

What is the minimum external capacitance required on Voutx/Vouty/Voutz?

A minimum load capacitance of 2.5 nF is required on each analog output (Voutx/Vouty/Voutz) to ensure stable operation and define the low-pass filter cutoff frequency. Using less than 2.5 nF may cause oscillation or inaccurate bandwidth limiting; recommended values range from 10 nF (500 Hz) to 5 µF (1 Hz) per Table 6.