FXOS8700CQ datasheet(9/86 Pages) FREESCALE

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Sensors

Freescale Semiconductor, Inc.

Device Characteristics

4.1

Mechanical characteristics (accelerometer)

Table 2. Mechanical characteristics @ VDD = 2.5V, VDDIO = 1.8V T = 25°C unless otherwise noted.

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Measurement range(1)

1. Dynamic range is limited to ±4g when in the low-noise mode.

±2g mode

±2

±4g mode

±4

±8g mode

±8

Sensitivity

±2g mode

4096

LSB/g

0.244

mg/LSB

±4g mode

2048

LSB/g

0.488

mg/LSB

±8g mode

1024

LSB/g

0.976

mg/LSB

TCSo(1)

Sensitivity change with temperature

±2g, ±4g, ±8g modes

±0.008

%/°C

Soa

Sensitivity accuracy(2)

2. Sensitivity remains in spec as stated, but changing the oversampling mode to low power causes a 3% sensitivity shift. This behavior is also

seen when changing from 800 Hz ODR to any other ODR in the normal, low-noise + low-power, or high-resolution modes.

±1

TyOff

Zero-g level offset accuracy(3)

3. Before board mount.

±2g, ±4g, ±8g modes

±20

TyOffPBM Zero-g level offset accuracy post-board mount(4)

4. Post-board mount offset specifications are based on an 8-layer PCB.

±2g, ±4g, ±8g modes

±30

TCOff

Zero-g level change versus temperature

-40°C to 85°C(1)

±0.15

mg/°C

Nonlinearity

Best-fit straight line

Over ±2g range normal mode

Over ±1g range low-noise mode

TBD

%FS

Vst

Self-Test output change(5)

5. Self-test is only exercised along one direction for each sensitive axis.

Set to ±4g mode

+181

+255

+1680

LSB

ODR accuracy, 2 MHz clock

±2

Output-data bandwidth

ODR/3

ODR/2

Noise

Output-noise density

ODR = 400 Hz, normal mode

126

µg/

√Hz

Noise

Output-noise density low-noise mode(1)

ODR = 400 Hz, normal mode

µg/

√Hz

Top

Operating temperature range

-40

+85

°C

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