FXOS8700CQ
6-axis sensor with integrated linear accelerometer and
magnetometer
Rev. 7.0 - 22 March 2016
Data sheet: Technical data
1. General description
FXOS8700CQ is a small, low-power, 3-axis, linear accelerometer and 3-axis,
magnetometer combined into a single package. The device features a selectable I
2
C or
point-to-point
SPI serial interface with 14-bit accelerometer and 16-bit magnetometer ADC
resolution along with smart-embedded functions. FXOS8700CQ has dynamically
selectable acceleration full-scale ranges of ±2
g/±4 g/±8 g
and a fixed magnetic
measurement range of ±1200
μT.
Output data rates (ODR) from 1.563 Hz to 800 Hz are
selectable by the user for each sensor. Interleaved magnetic and acceleration data is
available at ODR rates of up to 400 Hz. FXOS8700CQ is available in a plastic QFN
package and it is guaranteed to operate over the extended temperature range of –40 °C
to +85 °C.
2. Features and benefits
Complete 6-axis, e-compass hardware solution
1.95 V to 3.6 V VDD supply voltage, 1.62 V to 3.6 V VDDIO voltage
±2
g/±4 g/±8 g
dynamically selectable acceleration full-scale range
±1200 µT magnetic sensor full-scale range
Output data rates (ODR) from 1.563 Hz to 800 Hz for each sensor, and up to 400 Hz
when operated in hybrid mode with both sensors active
Low noise: <
126
μg/√Hz
acceleration noise density at 200-Hz bandwidth,
< 100 nT/√Hz magnetic noise density at 100-Hz bandwidth
14-bit ADC resolution for acceleration measurements
16-bit ADC resolution for magnetic measurements
Low power: 240
μA
current consumption at 100 Hz, and 80
μA
at 25 Hz with both
sensors active
Embedded programmable acceleration event functions
Freefall and motion detection
Transient detection
Vector-magnitude change detection
Pulse and tap detection (single and double)
Orientation detection (portrait/landscape)
Embedded programmable magnetic event functions
Threshold detection
Vector-magnitude change detection
Autonomous magnetic min/max detection
Autonomous hard-iron calibration
NXP Semiconductors
FXOS8700CQ
6-axis sensor with integrated linear accelerometer and magnetometer
Programmable automatic ODR change using auto-wake and return-to-sleep functions
to save power. This function works with both magnetic and acceleration event interrupt
sources.
32-sample FIFO for acceleration data only
Integrated accelerometer self-test function
3. Applications
Security: motion detection, door opening, smart home applications, robotics, and
unmanned aerial vehicles (UAVs) with electronic compass (e-compass) function.
Medical applications: patient monitoring, fall detection, and rehabilitation
E-compass in mobile devices, tablets, and personal navigation devices
User interface (menu scrolling by orientation change, tap detection for button
replacement)
Orientation detection (portrait/landscape: up/down, left/right, back/front orientation
identification)
Augmented reality (AR), gaming, and real-time activity analysis (pedometry, freefall,
and drop detection for hard disk drives and other devices)
Power management for mobile devices using inertial and magnetic event detection
Wearable devices: motion detection, activity monitoring, sports monitoring, context
awareness, and shock and vibration monitoring (mechatronic compensation, shipping,
and warranty usage logging)
4. Ordering information
Table 1.
Ordering information
Temperature range
–40 °C to +85 °C
Package description
QFN
Shipping
Tape and reel
Part number
FXOS8700CQR1
FXOS8700CQ
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2016. All rights reserved.
Product data sheet
Rev. 7.0 — 22 March 2016
2 of 113
NXP Semiconductors
FXOS8700CQ
6-axis sensor with integrated linear accelerometer and magnetometer
5. Block diagram
Fig 1.
Block diagram
FXOS8700CQ
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2016. All rights reserved.
Product data sheet
Rev. 7.0 — 22 March 2016
3 of 113
NXP Semiconductors
FXOS8700CQ
6-axis sensor with integrated linear accelerometer and magnetometer
6. Pinning information
6.1 Pinning
Fig 2.
Pin configuration
FXOS8700CQ
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2016. All rights reserved.
Product data sheet
Rev. 7.0 — 22 March 2016
4 of 113
NXP Semiconductors
FXOS8700CQ
6-axis sensor with integrated linear accelerometer and magnetometer
6.2 Pin description
Table 2.
Symbol
VDDIO
BYP
Reserved
SCL/SCLK
GND
SDA/MOSI
SA0/MISO
Crst
INT2
SA1/CS_B
INT1
GND
Reserved
VDD
N/C
RST
[2]
[1]
[2]
[3]
Pin description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Description
Interface supply voltage
Internal regulator output bypass capacitor connection
Test reserved, connect to GND
I
2
C serial clock/SPI clock
[1]
Ground
I
2
C serial data/SPI master out, slave in
[1][2]
I
2
C address selection bit 0/SPI master in, slave out
[1][2][3]
Magnetic reset capacitor
Interrupt 2
I
2
C address selection bit 1/SPI chip select (active low)
[2][3]
Interrupt 1
Ground
Test reserved, connect to GND
Sensor supply voltage
Not connected internally
Reset input, active high. Connect to GND if unused
Refer to
Section 10.2.1
regarding point-to-point SPI operation.
Refer to
Section 10.2.3
regarding SPI bus requirements during 1 ms period following a reset
Refer to
Table 11
for I
2
C address options selectable using the SA0 and SA1 pins.
7. Electrical connections
Device power is supplied through the VDD pin. Power supply decoupling capacitors
(100 nF ceramic plus 4.7
μ
F bulk) should be placed as close as possible to pin 14 of the
device. The digital interface supply voltage (VDDIO) should be decoupled with a 100 nF
ceramic capacitor placed as close as possible to pin 1 of the device.
The digital control signals SCL, SDA, SA0, SA1, and RST are not tolerant of voltages
exceeding VDDIO + 0.3 V. If VDDIO is removed, these pins will clamp any logic signals
through their internal ESD protection diodes. The function and timing of the two interrupt
pins (INT1 and INT2) are user programmable through the I
2
C/SPI interface. The SDA and
SCL I
2
C connections are open drain and therefore require a pullup resistor as shown in
the application diagram in
Figure 3.
The INT1 and INT2 pins may also be configured for
open-drain operation. If they are configured for open drain, external pullup resistors are
required.
FXOS8700CQ
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2016. All rights reserved.
Product data sheet
Rev. 7.0 — 22 March 2016
5 of 113
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
