AIS2IH datasheet(17/63 Pages) STMICROELECTRONICS

17 / 63 page

The AIS2IH features a data-ready signal which indicates when a new set of measured acceleration data is

available, thus simplifying data synchronization in the digital system that uses the device.

3.5

Factory calibration

The IC interface is factory-calibrated for sensitivity (So) and Zero-g level offset.

The trim values are stored inside the device in nonvolatile memory. Any time the device is turned on, the trimming

parameters are downloaded into the registers to be used during active operation. This allows using the device

without further calibration. If an accidental write occurs in the registers where trimming parameters are stored, the

BOOT bit in CTRL2 (21h) can help to retrieve the correct trimming parameters from nonvolatile memory without

the need to switch on/off the device. This bit is automatically reset at the end of the download operation. Setting

this bit has no impact on the control registers.

3.6

Temperature sensor

The temperature is available in OUT_T_L (0Dh), OUT_T_H (0Eh) stored as two's complement data, left-justified

in 12-bit mode and in OUT_T (26h) stored as two's complement data, left-justified in 8-bit mode.

Refer to Table 5. Temperature sensor characteristics for the conversion factor.

AIS2IH

Factory calibration

DS12421 - Rev 4

page 17/63

AIS2IH Datasheet(PDF) 17 Page - STMicroelectronics