Digital Output Type 3-axis Acceleration Sensor HAAM-385 ■ Features ・12-bit digital acceleration signal output ・Serial Interface available (I2C or SPI) ・Low Voltage Drive (2.4V～), Interface block can be driven by as low as 1.7V ・Low Power Consumption ・Standby mode : 2µA Max ・Normal mode : 350µA Max. (at 200Hz) ・Various output interrupt signals by preset threshold (Wakeup, Shock detection ,Drop detection) ・Rated Acceleration(±2G, ±4G, ±8G) and Data rate can be set. ■ Additional functions Item Function This is a function to change data rate(DR) by register setting Data rate change Settable data rate（400, 200, 100, 50, 20.4 Hz） If detected acceleration change is more than threshold, interrupt signal will be generated. Data rate can be changed after interrupt signal generated. Wake-Up output Shock detection output Drop detection output Data Ready (DRDY) output If acceleration of any selected axis is more than threshold, interrupt signal will be generated If acceleration of all selected axis go under threshold, interrupt signal will be generated. This outputs signal to indicate register updating of acceleration data was completed. ■ Outline dimension Unit：mm ■ Block Diagram HAAM-385 VDD Sensor OSC VREF ADC Digital Filter LCA X Y MUX AMP INT1 Z INT2 Control Logic OTP GND I/F (I2C, SPI) IFS 2011.10.1(rev.2) RESET *1 CS SPC/SCL SDI/SDA HOKURIKU VDD_IO *2 SDO/ADDR *3 *Details are subject to change without notice. 1 Digital Output Type 3-axis Acceleration Sensor HAAM-385 ■ Terminal Assignment & Functions No Terminal Function 1 SDO/ADDR When SPI(4-wire) selected: Serial data output terminal When I2C selected: slave address LSB setting (7bit) 2 INT2 Interrupt signal output 2 3 INT1 Interrupt signal output 1 4 VDD_IO Power supply input to drive serial interface. If voltage of host side connecting to HAAM-385 is less than +2.4V, communication is possible by supplying power to VDD_IO terminal. Where, please use by keeping VDD (+2.4～+3.6V) ≧ VDD_IO (1.7V～VDD). 5 GND Power supply ground 6 Reserved Connect GND terminal 7 LCA Connect capacitor to stabilize internal reference voltage Please connect 0.1μF capacitor between LCA and GND. 8 VDD Power input to drive sensor 9 Reserved Connect GND terminal 10 IFS I2C/SPI selection terminal (Lo：SPI, Hi：I2C) 11 RESET Reset Signal Input (Active low) 12 CS SPI Chip Selection Input .Slave SPI chip selection line. Active low. 13 SPC/SCL 14 SDI/SDA When SPI(4-wire) selected: Serial Clock Input. When I2C selected: Serial Clock Input/Output. When SPI(4-wire) selected: Serial Data Input. When I2C selected: Serial Data Input/Output. ■ Standard Specification Rating Item Min. Typ. Max. nit Remark Operating Condition Temperature Range Power Supply Storage Temperature Range -40 85 ℃ Operating Temperature Range -25 85 ℃ Operating Voltage Range 2.4 3.6 V Interface Voltage Range 1.7 VDD V Current Consumption 400Hz 560 µA 200Hz 282 µA 100Hz 142 µA 50Hz 72 µA 20Hz 30 µA 4Hz 7.5 OSR=128, TBD Able to change by register setting µA Standby Current 2 µA Turn On Time 5 ms Shock Durability VDD VDD_IO 5000 When standby mode selected Standby →Compentation of first measure G Electrical Characteristics Rated Acceleration Output Resolution ±2G ±4G ±8G Data Rate ±2、±4、±8 0.98 G mg/LSB 1024 LSB/G 1.95 mg/LSB 512 LSB/G 12bit output When normal mode selected 3.9 mg/LSB 256 LSB/G 400, 200, 100, 50, 20, 4 Hz OSR=128, TBD Able to change by register setting 400 kHz 400pF 1 MHz 100pF 5 MHz 40pF Serial Interface Specification I2C Interface Speed SPI Interface Speed 2011.10.1(rev.2) HOKURIKU *Details are subject to change without notice. 2