MC3635 3-Axis Accelerometer
GENERAL DESCRIPTION
FEATURES
Range, Sampling & Power
The MC3635 is an ultra-low power, low-
noise, integrated digital output 3-axis
accelerometer with a feature set optimized
for wearables and consumer product
motion sensing. Applications include
wearable consumer products, IoT devices,
user interface control, gaming motion input,
electronic compass tilt compensation for
cell phones, game controllers, remote
controls and portable media products.
Low noise and low power are inherent in
the monolithic fabrication approach, where
the MEMS accelerometer is integrated in a
single-chip with the electronics integrated
circuit.
±2, 4, 8, 12 or 16g ranges
8, 10 or 12-bit resolution with FIFO
o
14-bit single samples
Sample rate 14 - 1300 samples/sec
o
Sample trigger via internal oscillator,
clock pin or software command
Sniff and Wake modes
o
0.3 μA Sniff current @ 1Hz
o
Separate or combined sniff/wake
Ultra-Low Power with 32 sample FIFO
o
0.9 μA typical current @ 25Hz
o
1.6 μA typical current @ 50Hz
o
2.8 μA typical current @ 100Hz
o
36 μA typical current @ 1300Hz
Simple System Integration
In the MC3635 the internal sample rate can
be set from 14 to 1300 samples / second.
Specific tap or sample acquisition
conditions can trigger an interrupt to a
remote MCU. Alternatively, the device
supports the reading of sample and event
status via polling.
I2C interface, up to 1 MHz
SPI Interface, up to 8 MHz
1.6 × 1.6 × 0.94 mm 10-pin package
Single-chip 3D silicon MEMS
Low noise to 2.3mgRMS
ROHS Compliant
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MC3635 3-Axis Accelerometer
TABLE OF CONTENTS
1
2
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
Order Information............................................................................................................. 5
Functional Block Diagram ................................................................................................ 6
Packaging and Pin Description ........................................................................................ 7
Package Outline ................................................................................................................... 7
Package Orientation ............................................................................................................. 8
Pin Description ..................................................................................................................... 9
Typical Application Circuits ................................................................................................ 10
Tape and Reel ................................................................................................................... 13
Soldering Profile ................................................................................................................. 15
Shipping and Handling Guidelines ..................................................................................... 15
Moisture Sensitivity Level Control ...................................................................................... 15
4
4.1
4.2
4.3
Specifications................................................................................................................. 16
Absolute Maximum Ratings ................................................................................................ 16
Sensor Characteristics ....................................................................................................... 17
Electrical and Timing Characteristics.................................................................................. 18
Electrical Power and Internal Characteristics .................................................................. 18
Electrical Characteristics ................................................................................................ 19
I2C Timing Characteristics .............................................................................................. 20
SPI Timing Characteristics.............................................................................................. 21
4.3.1
4.3.2
4.3.3
4.3.4
5
5.1
5.2
5.3
5.4
5.5
5.6
General Operation ......................................................................................................... 22
Sensor Sampling ................................................................................................................ 22
Offset and Gain Calibration ................................................................................................ 22
Reset ................................................................................................................................. 22
Reload ............................................................................................................................... 23
Operational Modes ............................................................................................................. 24
Mode State Machine Flow .................................................................................................. 25
6
6.1
6.2
6.3
6.4
6.5
Interfaces ....................................................................................................................... 26
SPI vs I2C Operation Modes .............................................................................................. 26
I2C Physical Interface ........................................................................................................ 26
I2C Message Format .......................................................................................................... 27
SPI Physical Interface ........................................................................................................ 28
SPI 3-Wire Mode ................................................................................................................ 28
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MC3635 3-Axis Accelerometer
6.6
6.7
6.8
6.9
6.10
6.11
6.12
SPI Protocol ....................................................................................................................... 28
SPI Register Write Cycle - Single ....................................................................................... 29
SPI Register Write Cycle - Burst ........................................................................................ 29
SPI Register Read Cycle - Single ....................................................................................... 29
SPI Register Read Cycle - Burst ........................................................................................ 30
SPI Status Option............................................................................................................... 30
SPI High-Speed Mode........................................................................................................ 31
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
7.15
7.16
7.17
7.18
7.19
7.20
7.21
7.22
7.23
7.24
7.25
7.26
Register Interface .......................................................................................................... 32
Register Summary ............................................................................................................. 33
(0x00) Extended Status Register 1 ..................................................................................... 35
(0x01) Extended Status Register 2 ..................................................................................... 36
(0x02 – 0x07) XOUT, YOUT & ZOUT Data Output Registers ............................................. 37
(0x08) Status Register 1..................................................................................................... 38
(0x09) Status Register 2..................................................................................................... 40
(0x0D) Feature Register 1 .................................................................................................. 42
(0x0E) Feature Register 2 .................................................................................................. 44
(0x0F) Initialization Register 1 ............................................................................................ 47
(0x10) Mode Control Register ............................................................................................ 48
(0x11) Rate Register 1 ....................................................................................................... 50
(0x12) Sniff Control Register .............................................................................................. 52
(0x13) Sniff Threshold Control Register ............................................................................. 55
(0x14) Sniff Configuration Register .................................................................................... 58
(0x15) Range and Resolution Control Register .................................................................. 60
(0x16) FIFO Control Register ............................................................................................. 62
(0x17) Interrupt Control Register ........................................................................................ 63
(0x1A) Initialization Register 3 ............................................................................................ 65
(0x1B) Scratchpad Register ............................................................................................... 66
(0x1C) Power Mode Control Register ................................................................................. 67
(0x20) Drive Motion X Register .......................................................................................... 69
(0x21) Drive Motion Y Register .......................................................................................... 70
(0x22) Drive Motion Z Register........................................................................................... 71
(0x24) Reset Register ........................................................................................................ 72
(0x28) Initialization Register 2 ............................................................................................ 73
(0x29) Trigger Count Register ............................................................................................ 74
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MC3635 3-Axis Accelerometer
7.27
7.28
7.29
7.30
7.31
7.32
(0x2A – 0x2B) X-Axis Offset Registers ............................................................................... 75
(0x2C – 0x2D) Y-Axis Offset Registers .............................................................................. 76
(0x2E – 0x2F) Z-Axis Offset Registers ............................................................................... 77
(0x2B & 0x30) X-Axis Gain Registers ................................................................................. 78
(0x2D & 0x31) Y-Axis Gain Registers................................................................................. 79
(0x2F & 0x32) Z-Axis Gain Registers ................................................................................. 80
8
9
10
Index of Tables .............................................................................................................. 81
Revision History ............................................................................................................. 83
Legal .............................................................................................................................. 84
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MC3635 3-Axis Accelerometer
1 ORDER INFORMATION
Part Number
MC3635
Resolution
8 to 14-bit
Order Number
MC3635
Package
LGA-10
Shipping
Tape & Reel, 5Ku
Table 1. Order Information
Table 2. Top Marking Specification
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DSP 与 ARM 处理器
