FXLS8971CF datasheet(14/100 Pages) NXP

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NXP Semiconductors

FXLS8971CF

3-Axis Low-g Accelerometer

VDD = 3.0 V , T = 25 °C, unless otherwise noted.

Typical values represent mean or mean ±1 σ values, depending on the specific parameter.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TON

Transition time (Standby mode to

Active mode with valid data output)

—

0.5285 +

(DEC – 1)

× 998.4 /

(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 15.3.3 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 = 3.0 V, T = 25 °C, unless otherwise noted.

Typical values represent mean or mean ±1 σ values, depending on the specific parameter.

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 temperature

Output Code = 00h

—

°C

Table 9. Temperature sensor performance parameters

12 I2C digital interface

The registers embedded within FXLS8971CF 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 FXLS8971CF 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

Pin Name

Pin Description

SCL

I2C serial clock (pull-up resistor is required)

SDA

I2C serial data (pull-up resistor is required)

Table 10. I2C serial interface pin description

FXLS8971CF

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

Product data sheet

Rev. 2.1 — 7 March 2024

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