FXLS8974CF datasheet(11/96 Pages) NXP

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NXP Semiconductors

FXLS8974CF

3-Axis Low-g Accelerometer

VDD = 1.8 V , T = 25 °C, unless otherwise noted.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

IDDBOOT

Boot sequence peak current draw

T = –40 °C to

+105 °C; with

no decoupling

capacitors on VDD pin

—

TON

Transition time (Standby mode to

Active mode with valid data output)

—

528.5 µs

+ 0.9984 *

(DEC – 1)

* (1/(ODR

* DEC))[2]

—

TOP

Operating temperature range

—

–40

—

+105

°C

Table 8. Electrical characteristics...continued

[1]

Max spec covers the situation where an interrupt pulse is issued by the sensor at the same time the host MCU drives MOT_DET low to signal a hibernate

command. In that case, their durations add up.

[2]

DEC = decimation factor. The selected ODR and operating mode determines the decimation factor. See Section 15.13 for more information on setting

or determining the measurement decimation factor. In LPM, the DEC factor is fixed at 1, making the time to first sample output fixed at 528.5 μs (typ),

independent of the selected ODR.

11 Temperature sensor characteristics

VDD = 1.8 V, T = 25 °C, unless otherwise noted.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

nTEMP

Output data width

—

bits

FSRTEMP

Measurement range

—

–40 to +105

—

°C

SENTEMP

Sensitivity

—

°C/LSB

SENTOL-TEMP Sensitivity tolerance

—

±2.5

—

OFFTEMP

Nominal zero-output

offset

Output Code = 00h

—

°C

Table 9. Temperature sensor performance parameters

12 I2C digital interface

The registers embedded within FXLS8974CF may be accessed using an I2C interface

when the INTF_SEL pin is tied to GND. If the VDD supply is not present, the device is in

shutdown mode and any communications on the interface are ignored. When the device

is on a common I2C-bus with other secondary devices, the VDD supply pin must be left

unconnected (high-impedance) when the device supply is turned off to ensure that the

internal ESD protection diodes do not become forward biased and prevent the bus from

functioning normally (clamping).

The I2C secondary interface port of FXLS8974CF is compliant with the following three

operating modes as defined in UM10204[3]:

• Fast-mode Plus (Fm+) at 1000 kHz

• Fast-mode (Fm) at 400 kHz

• Standard-mode (Sm) at 100 kHz

FXLS8974CF

All information provided in this document is subject to legal disclaimers.

Objective data sheet

Rev. 1 — 27 April 2021

11 / 96

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