SCA820-D04 Murata

SCA820-D04 Data Shee t SCA820-D04 1-AXIS HIGH PERFORMANCE ACCELEROMETER WITH DIGITAL SPI INTERFACE Features Applications 3.3V supply voltage SCA820-D04 is targeted to automotive applications 2 g measurement range with high stability requirements. Typical applications Single axis measurement in Z direction Hill Start Aid (HSA) 30mg offset accuracy over temp range Electronic Parking Brake (EPB) SPI digital interface Roll Over detection Enhanced self diagnostics features Suspension control Size 7.6 x 3.3 x 8.6 mm (w x h x l) Motion and position measurements Qualified according to AEC-Q100 standard Package, pin-out and SPI protocol compatible with Murata digital accelerometer product family RoHS compliant Dual Flat Lead (DFL) plastic package suitable for lead free soldering process and SMD mounting Proven capacitive 3D-MEMS technology General description SCA820-D04 is a single axis inclinometer component based on Murata s capacitive 3D-MEMS technology. The component integrates high accuracy micromechanical acceleration sensing together with a flexible SPI digital interface. Dual Flat Lead (DFL) housing guarantees reliable operation over product lifetime. SCA820-D04 is designed, manufactured and tested for high stability, reliability and quality requirements of automotive applications. The inclinometer has an extremely stable output over wide ranges of temperature, humidity and mechanical noise. The component is qualified to the AEC-Q100 standard and has several advanced self diagnostics features. The DFL housing is suitable for SMD mounting and the component is compatible with the RoHS and ELV directives. SCA820-D04 is a part of Murata digital accelerometer family and fully compatible with multi axis accelerometers (SCA2100 series and SCA3100 series) and other single axis accelerometers (SCA800 series). Murata Electronics Oy 1/4 1/4 www.muratamems.fi Doc.nr. 82 700 00 D SCA820-D04 Performance Characteristics Vdd=3.3 V and ambient temperature unless otherwise specified. Parameter Condition A) Min Typ Max Units Analog and digital Vdd 3.0 3.6 V Current consumption Active mode 5 6.3 mA Power down mode 0.1 mA Measurement range Measurement axes (Z) -2 2 g Operating temperature -40 125 C B) Offset total error Temperature range -40 ... +125 C -70 70 mg C) Offset calibration error 25 C 5C -40 18 40 mg D) E) D) Offset temperature drift Temperature range -40 ... +125 C -30 25 30 mg Temperature range -20 ... +85 C 15 mg Sensitivity 12 bit output 900 Count/g Between 3 0.0637 /Count Total sensitivity error Temperature range -40 ... +125 C -4 4 % FS Sensitivity calibration error 25 C 5C 1.1 % FS Sensitivity temperature drift Temperature range -40 ... +125 C 1.3 % FS Linearity error +1g ... -1g range, end point fit -20 20 mg +2g ... -2g range, end point fit -40 40 mg Cross-Axis sensitivity 3.5 % Zero acceleration output 2-complement 0 Counts Amplitude response -3dB frequency 30 80 Hz Noise 2 5 mg RMS Power on setup time 0.1 s Output data rate 2000 Hz Output load 50 pF SPI clock rate 8 MHz ESD Human Body Model 2 kV Charge Device Model 1 kV Solderability IPC/JEDEC J-STD-020C, +245 C, 40 s Moisture level IPC/JEDEC J-STD-020C, Level 3 Mechanical shock 20 000 g ID register value Customer readable ID register (27hex) 04 A) Typical values are 3 sigma variation limits from validation test population. B) Includes offset deviation from 0g value including calibration error and drift over lifetime, temperature and supply voltage. C) Includes offset deviation from 0g value including calibration error and drift over lifetime. D) Offset drift due to temperature. Value is a relative value and has been centered to zero. Error defined as maximum change of offset in temperature range. Offset (max)-Offset Min). 100% tested in production. E) Biggest change of output from RT value due temperature. MOSI MISO SPI SCK C/V A/D Signal CSB conditioning and filtering Temp sensor PWM PWM Self diagnostics Figure 1. SCA820-D04 Block Diagram Murata Electronics Oy 2/4 2/4 www.muratamems.fi Doc. Nr. 82 700 00 D