SCA2120-D07 VTI Automotive Digital Accelerometer Platform Data Sheet SCA2120-D07 2-AXIS ACCELEROMETER WITH DIGITAL SPI INTERFACE Features • • • • • • • • • • • • 3.3V supply voltage ±2 g measurement range 2-axis measurement YZ directions +-70mg offset accuracy over temp range Internal temperature sensor SPI digital interface Enhanced self diagnostics features Size 7.6 x 3.3 x 8.6 mm (w x h x l) Qualified according to AEC-Q100 standard Package, pin-out and SPI protocol compatible with VTI 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 Applications SCA2120-D07 is targeted to automotive applications. Typical applications include • Electronic Stability Control (ESC) • Hill Start Aid (HSA) • Electronic Parking Brake (EPB) • Roll Over • Suspension • Inclination • Industrial applications General Description SCA2120-D07 is a two axis accelerometer component based on VTI capacitive 3D-MEMS technology. The component integrates high accuracy micromechanical acceleration sensing together with a flexible SPI digital interface. Dual Flat Lead (DFL) housing of the component guarantees robust operation over the product lifetime. SCA2120-D07 is designed, manufactured and tested for high stability, reliability and quality requirements of automotive applications. The accelerometer has extremely stable output over wide range of temperature, humidity and mechanical noise. The component is qualified against AEC-Q100 standard and has several advanced self diagnostics features. The DFL housing is suitable for SMD mounting and the component is compatible with RoHS and ELV directives. SCA2120-D07 is a part of VTI digital accelerometer family and fully compatible with single axis accelerometers (SCA800 series) and other multi axis accelerometers (SCA2100 series and SCA3100 series). VTI Technologies Oy www.vti.fi 1/3 Doc.nr. 82 685 00 D SCA2120-D07 Performance Characteristics Vdd=3.3 V and ambient temperature unless otherwise specified. Parameter Condition Min 3.0 Analog and digital Vdd Current consumption Active mode Power down mode Measurement axes (YZ) Measurement range Operating temperature Offset total error A) Offset temperature dependency B) Sensitivity Total sensitivity error Linearity error B) C) -2 -40 -100 -70 12 bit output Max 3.6 5 2 125 100 70 900 +1g ... -1g range +2g...+1g, -1g...-2g -4 -20 -40 2-complement -3dB frequency 30 50 8 2 1 20 000 g 0 55 5 0.1 Human Body Model Charge Device Model IPC/JEDEC J-STD-020C, Level 3 Units V mA mA g °C mg mg Count/g % FS mg mg % Counts Hz mg RMS s Hz pF MHz kV kV 4 20 40 ±3.5 2000 Moisture sensitivity level Mechanical shock A) 3 0.05 Temperature range -40 ... +125 °C Temperature range -40 ... +125 °C Cross-Axis sensitivity Zero acceleration output Amplitude response C) Noise Power on setup time Output data rate Output load SPI clock rate ESD protection Typ Includes offset deviation from 0g value including calibration error and change over lifetime, temperature and supply voltage. Offset dependency due to temperature. Value is a relative value and has not to be centered to zero. See figure 4. C/V Oscillator & clock Reference Analog calibration & ADC NonVolatile Memory DEMUX 1:4 Lowpass Filter Decimation Lowpass Filter Decimation Lowpass Filter Decimation Lowpass Filter Decimation Temperature sensor Continuous self test Coordinate Mapping and Calibration SCK SPI i/f MISO MOSI CSB Start-up self test Figure 1. SCA2120-D07 Block diagram VTI Technologies Oy www.vti.fi 2/3 Doc. Nr. 82 685 00 D SCA2120-D07 Figure 2. Accelerometer measuring directions Figure 3. Housing dimensions Figure 4. Frequency and phase response curves VTI Technologies Oy www.vti.fi 3/3 Doc. Nr. 82 685 00 D SCA2120-D07 Document Change Control Author Approved by TVi Department/Role ABU / Product manager Rev. A Date 28.8.2006 Change Description Preliminary release Author TL B 6.10.2006 TL C 20.6.2007 D 22.11.2007 Resolution from 13 bit to 12 bit, RoHS compliant added Other minor changes Frequency and phase response graph updated, linearity spec. increased to +/-2.0g Version change from D05 to D07 due obsoletion of the old version. No changes in the performance spec. VTI Technologies Oy www.vti.fi Reviewed by ECN JVa, MiA, JNi 3845 MiA TVi 4/3 Doc. Nr. 82 685 00 D