MC3635 3-Axis Accelerometer GENERAL DESCRIPTION FEATURES Range, Sampling & Power The MC3635 is an ultra-low power, low- 2, 4, 8, 12 or 16g ranges noise, integrated digital output 3-axis 8, 10 or 12-bit resolution with FIFO accelerometer with a feature set optimized o 14-bit single samples for wearables and consumer product Sample rate 14 - 1300 samples/sec motion sensing. Applications include o Sample trigger via internal oscillator, wearable consumer products, IoT devices, clock pin or software command user interface control, gaming motion input, Sniff and Wake modes electronic compass tilt compensation for o 0.3 A Sniff current 1Hz cell phones, game controllers, remote o Separate or combined sniff/wake controls and portable media products. Ultra-Low Power with 32 sample FIFO o 0.9 A typical current 25Hz o 1.6 A typical current 50Hz Low noise and low power are inherent in o 2.8 A typical current 100Hz the monolithic fabrication approach, where o 36 A typical current 1300Hz the MEMS accelerometer is integrated in a single-chip with the electronics integrated circuit. Simple System Integration I2C interface, up to 1 MHz SPI Interface, up to 8 MHz In the MC3635 the internal sample rate can 1.6 1.6 0.94 mm 10-pin package be set from 14 to 1300 samples / second. Single-chip 3D silicon MEMS Specific tap or sample acquisition Low noise to 2.3mgRMS conditions can trigger an interrupt to a ROHS Compliant remote MCU. Alternatively, the device supports the reading of sample and event status via polling. Information furnished by MEMSIC is believed to be accurate and reliable. MEMSIC Semiconductor (Tianjin) Co., Ltd. However, no responsibility is assumed by MEMSIC for its use, or for any infringements of patents or other rights of third parties which may result Room 4-501, Financial Center, No. 158, West Third Road, from its use. No license is granted by implication or otherwise under any Tianjin Airport Economic Zone, Tianjin, China, 300308 patent or patent rights of MEMSIC. Tel: +86 022-59896226 www.memsic.com MEMSIC MC3635 APS-048-0044 v1.8 Page 1 of 83 Formal release date: 2020/07/08 TABLE OF CONTENTS 1 Order Information ............................................................................................................. 5 2 Functional Block Diagram ................................................................................................ 6 3 Packaging and Pin Description ........................................................................................ 7 3.1 Package Outline ................................................................................................................... 7 3.2 Package Orientation ............................................................................................................. 8 3.3 Pin Description ..................................................................................................................... 9 3.4 Typical Application Circuits ................................................................................................ 10 3.5 Tape and Reel ................................................................................................................... 13 3.6 Soldering Profile ................................................................................................................. 15 3.7 Shipping and Handling Guidelines ..................................................................................... 15 3.8 Moisture Sensitivity Level Control ...................................................................................... 15 4 Specifications ................................................................................................................. 16 4.1 Absolute Maximum Ratings ................................................................................................ 16 4.2 Sensor Characteristics ....................................................................................................... 17 4.3 Electrical and Timing Characteristics .................................................................................. 18 4.3.1 Electrical Power and Internal Characteristics .................................................................. 18 4.3.2 Electrical Characteristics ................................................................................................ 19 4.3.3 I2C Timing Characteristics .............................................................................................. 20 4.3.4 SPI Timing Characteristics.............................................................................................. 21 5 General Operation ......................................................................................................... 22 5.1 Sensor Sampling ................................................................................................................ 22 5.2 Offset and Gain Calibration ................................................................................................ 22 5.3 Reset ................................................................................................................................. 22 5.4 Reload ............................................................................................................................... 23 5.5 Operational Modes ............................................................................................................. 24 5.6 Mode State Machine Flow .................................................................................................. 25 6 Interfaces ....................................................................................................................... 26 6.1 SPI vs I2C Operation Modes .............................................................................................. 26 6.2 I2C Physical Interface ........................................................................................................ 26 6.3 I2C Message Format .......................................................................................................... 27 MEMSIC MC3635 APS-048-0044 v1.8 Page 2 of 83 Formal release date: 2020/07/08