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MEMS acceleration sensor: single-axis with PSI5 point-to-point interface
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The AIS1200PS is a peripheral acceleration sensor with a single-axis sensing element and an IC interface able to provide acceleration information to a master control unit through a Manchester-coded protocol (125 kbps).

The sensing element, capable of detecting the acceleration, is manufactured using a dedicated process developed by ST to produce inertial sensors and actuators in silicon.

The IC interface is manufactured using a BCD process that allows a high level of integration. The device is factory trimmed to better tune the sensing element characteristics with the acceleration information to be supplied.

The AIS1200PS has a full scale of ±200 g. The acquisition chain is made up of a C/V converter, a full-differential charge amplifier, a 2nd order LPF with a cutoff frequency of 175 Hz, and a second charge amplifier to adapt the dynamic range to an SAR A/D converter.

The differential capacitance of the sensor is proportional to the proof mass displacement; thus, by sensing the differential capacitance, the position of the sensor is determined. Then, since the mass position is known and the position is related to the input acceleration, the input acceleration can be easily deduced.

The device is available in a plastic SOIC package with 150 mils reverse frame forming for EMC enhancement and is specified over a temperature range extending from -40 °C to +125 °C.

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Errata Sheet
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Key Features

  • 5 V to 16 V single supply operation
  • 10-bit data output
  • Embedded voltage regulator
  • Embedded self-test
  • Asynchronous 2 wire connectivity
  • PSI5-A10P v1.3 compliant
  • Error detection: single bit even parity
  • Automotive AEC-Q100 qualified
  • ECOPACK®compliant
  • Extended temperature range: -40 °C to +125 °C

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS9670: MEMS acceleration sensor: single-axis with PSI5 point-to point interface
4.0 1,064 KB

Application Notes

Description Version Size
AN2328: HID device coding example
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AN4156: Hardware abstraction layer for Android
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Technical Notes & Articles

Description Version Size
TN0018: Surface mounting guidelines for MEMS sensors in an LGA package
5.0 218 KB

Related Tools and Software

Related Tools and Software

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Publications and Collaterals


Description Version Size
MEMS automotive sensors - Making our cars safer and more comfortable
1.0 774 KB


Description Version Size
MEMS sensors for automotive applications - brochure
1.0 2,720 KB

White Paper

Description Version Size
Mechanical characterization and simulation of fracture processes in polysilicon MEMS
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Physical Sensors Drive MEMS Consumerization Waves
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Sample & Buy

Part Number Marketing StatusPackagePacking TypeAutomotive GradeOrder From STUnit Price (US$)*
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
AIS1200PSTRActiveSO16Tape And ReelYes-No availability reported, please contact our Sales officeEcopack2-

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.