NXP Semiconductors KIT1925MMA1270D

Overview

KIT1925MMA1270D from Freescale Semiconductor is a sensor evaluation kit for the MMA1270D ±2.5g single-axis (Z-axis) silicon capacitive micromachined accelerometer in 16-lead SOIC package. It provides calibrated self-test, 2nd-order Bessel low-pass filtering (40–60 Hz), and ratiometric analog output (712.5–787.5 mV/g), enabling vibration monitoring and hard drive protection applications.

For engineers reviewing the KIT1925MMA1270D datasheet, KIT1925MMA1270D pinout, KIT1925MMA1270D application, or KIT1925MMA1270D equivalent, this kit supports rapid functional validation of the MMA1270D's analog output response, self-test activation via ST pin, status fault reporting, and noise-sensitive PCB layout practices including RC output filtering and ground plane implementation.

Technical Context

The KIT1925MMA1270D implements a complete interface platform for the MMA1270D accelerometer, integrating its 16-pin SOIC footprint with recommended decoupling (0.1 µF on VDD), RC output filtering (1 kΩ + 0.1 µF), and isolation from microcontroller switching noise. It exposes all functional pins - VOUT, STATUS, ST, VDD, VSS - while leaving factory trim and NC pins unconnected per datasheet guidance.

This kit enables verification of key operational behaviors: self-test output shift (0.9–1.6 V), status pin latching on EPROM parity error, zero-g offset drift (2.2–2.8 V at VDD = 5.0 V), and full-scale output range (VSS+0.25 to VDD−0.25 V) under 1.1–3.0 mA supply current across −40°C to +105°C.

Key Specifications

Availability

KIT1925MMA1270D is available at Aetrix Electronics and suitable for vibration monitoring systems, computer hard drive protection circuits, appliance control interfaces, and industrial bearing diagnostics requiring stable component supply and validated sensor interface reference designs.

Supply support for KIT1925MMA1270D 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

Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors and sensors, emphasizing automotive, industrial, and consumer motion-sensing solutions before its 2015 acquisition.

KIT1925MMA1270D belongs to Freescale's legacy MMA accelerometer evaluation kit family, developed specifically to accelerate design-in of their surface-micromachined analog accelerometers in reliability-critical mechanical sensing applications.

FAQ

What is the primary purpose of the KIT1925MMA1270D?

The KIT1925MMA1270D is an evaluation kit designed exclusively to validate the functionality and interface requirements of the MMA1270D ±2.5g Z-axis accelerometer. It provides a ready-to-use PCB layout with correct decoupling, RC filtering, and pin access - not a production sensor. Engineers use KIT1925MMA1270D to verify self-test response, zero-g offset stability, and analog output linearity before integrating the MMA1270D into final systems.

Does the KIT1925MMA1270D include the MMA1270D sensor IC?

Yes, the KIT1925MMA1270D includes one mounted MMA1270D accelerometer in a 16-lead SOIC package (Case 475–01). The kit is not a bare board - it populates the exact device specified in the ordering information, with all required passive components (0.1 µF VDD decoupling capacitor, 1 kΩ/0.1 µF RC filter) pre-installed per Freescale's recommended connection diagram.

How is self-test activated and verified using the KIT1925MMA1270D?

Self-test on the KIT1925MMA1270D is activated by applying a logic-high signal to the ST pin (Pin 8), which triggers electrostatic deflection of the MEMS proof mass. The resulting output shift appears at VOUT (Pin 4) as a 0.9–1.6 V step change. Simultaneously, the STATUS pin (Pin 5) goes high. This dual-response behavior - measurable voltage shift and status assertion - confirms both mechanical and electronic integrity of the MMA1270D within the KIT1925MMA1270D platform.

What does the STATUS pin indicate on the KIT1925MMA1270D?

The STATUS pin on the KIT1925MMA1270D reflects two conditions: (1) assertion during active self-test, and (2) latched high state upon EPROM parity error. It remains high until reset by a rising edge on ST - unless the fault persists. This behavior is intrinsic to the MMA1270D IC itself; the KIT1925MMA1270D simply exposes and routes this pin for external monitoring, enabling system-level fault detection without additional logic.

Can the KIT1925MMA1270D be used for high-temperature operation up to +105°C?

Yes, the KIT1925MMA1270D supports operation across the full MMA1270D temperature range of −40°C to +105°C. Its PCB layout, component selection (including temperature-rated capacitors), and grounding scheme comply with Freescale's thermal and noise guidelines. However, sustained operation above +85°C requires verification of solder joint reliability and ambient airflow - the KIT1925MMA1270D validates electrical functionality, not long-term mechanical endurance at extremes.