NXP Semiconductors MMA1200KEG

Overview

MMA1200KEG from Freescale Semiconductor is a surface-mount, micromachined silicon capacitive accelerometer with ±250g Z-axis measurement range, integrated 4th-order Bessel low-pass filter (f_–3dB = 360–440 Hz), ratiometric linear output (7.6–8.4 mV/g/V), and AEC-Q100 Grade 2 qualification (–40°C to +105°C). It delivers calibrated self-test, low-voltage detect, clock monitor, and EPROM parity check for automotive-grade vibration and impact monitoring.

For engineers reviewing the MMA1200KEG datasheet, MMA1200KEG pinout, MMA1200KEG application, or MMA1200KEG equivalent, this device supports high-reliability embedded sensing where pulse shape integrity, factory-trimmed zero-g offset, and hermetically sealed transducer performance are critical design requirements.

Technical Context

The MMA1200KEG integrates a polysilicon g-cell sensor and CMOS ASIC in a single SOIC-16 package, using switched-capacitor techniques for capacitance-to-voltage conversion and on-chip signal conditioning. Its 4-pole Bessel filter preserves transient fidelity without external components, and ratiometric output scales linearly with VDD (4.75–5.25 V) to cancel supply-induced ADC errors.

Self-test applies electrostatic force to the movable plate via dedicated ST pin, producing a calibrated ΔVOFF of 55–75 g response; STATUS pin latches fault conditions including LVD trip (VLVD = 3.25 V typ), clock frequency failure (f_min = 50–260 kHz), or EPROM parity error - resettable by ST pulse ≥100 μs.

Key Specifications

Pinout & Package

Package: 16-lead SOIC (Case 475-01), Pb-free, surface-mount compatible. Dimensions per Freescale Issue C drawing: 9.65 mm × 6.00 mm × 1.75 mm body, 1.27 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar accelerometer applications.

Compared with MMA1200EG, the MMA1200KEG adds Pb-free compliance and alternate silicon sourcing traceability; versus ADXL206, it trades resolution for ruggedness, diagnostics, and 50× wider dynamic range - making it suitable for safety-critical and high-shock environments where fault visibility matters.

Availability

MMA1200KEG is available at Aetrix Electronics and suitable for automotive airbag systems, industrial vibration monitoring, logistics impact detection, and structural health monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MMA1200KEG 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) is a global leader in embedded processing and sensor solutions, with deep expertise in automotive, industrial, and IoT applications.

The MMA series was designed specifically for high-reliability motion sensing in safety-critical systems, integrating MEMS transducers with signal-conditioning ASICs to deliver factory-calibrated, diagnostic-enabled accelerometers for automotive and industrial use.

FAQ

What is the Z-axis sensitivity specification for MMA1200KEG?

The MMA1200KEG provides a Z-axis sensitivity of 7.6–8.4 mV/g/V, meaning its output voltage changes linearly with applied acceleration and scales proportionally with supply voltage (VDD). At VDD = 5.0 V, typical zero-g offset is 2.5 V, and sensitivity is 8.0 mV/g. This ratiometric behavior ensures consistent measurement accuracy across supply variations, and is confirmed in Table 2 of the Freescale MMA1200KEG datasheet Rev 0 (2011).

Does MMA1200KEG require external filtering components?

No, the MMA1200KEG integrates a 4th-order switched-capacitor Bessel filter with a –3 dB bandwidth of 360–440 Hz, eliminating the need for external passive components to set cutoff frequency. However, Freescale recommends adding an external RC filter (1 kΩ + 0.01 μF) on the VOUT pin to suppress clock noise from the internal switched-capacitor circuitry, as specified in Figure 5 and Note 4 of the datasheet.

How does the self-test function work on MMA1200KEG?

The MMA1200KEG self-test applies electrostatic force to the movable g-cell plate via the ST pin, causing a calibrated deflection equivalent to 55–75 g of acceleration. This produces a measurable shift in VOUT, verifying both mechanical integrity and signal chain functionality. The STATUS pin reflects self-test activation, and the fault latch can be reset by pulsing ST high for ≥100 μs - details are fully documented in the "Self-Test" section of the MMA1200KEG datasheet.

What fault conditions cause the STATUS pin on MMA1200KEG to assert?

The STATUS pin on MMA1200KEG latches high when any of three fault conditions occur: supply voltage falling below the low-voltage detect threshold (VLVD = 3.25 V typ), internal clock frequency dropping below 50 kHz, or EPROM parity becoming odd. STATUS remains asserted until the fault clears and ST is pulsed high for ≥100 μs - a behavior explicitly defined in Table 2 and the "Status" section of the MMA1200KEG datasheet.

Is MMA1200KEG qualified for automotive applications?

Yes, the MMA1200KEG is qualified to AEC-Q100 Rev. F Grade 2, supporting operation from –40°C to +105°C ambient temperature. It also features hermetic wafer-level sealing, 2000 g unpowered shock survivability, and integrated diagnostics (self-test, LVD, clock monitor), making it suitable for automotive airbag systems and other safety-critical applications as stated in the "Features" and "Ordering Information" sections of the MMA1200KEG datasheet.