SCA620-EF8H1A

SCA620-EF8H1A Product Specification SCA620-EF8H1A SINGLE AXIS ACCELEROMETER WITH ANALOG INTERFACE The SCA620 accelerometer consists of a silicon bulk micro machined sensing element chip and a signal conditioning ASIC. The chips are mounted on a pre-molded package and wire bonded to appropriate contacts. The sensing element and ASIC are protected with silicone gel and lid. The sensor has 8 SMD legs (Gull-wing type). Applications Features Single +5 V supply SCA620 product family is targeted to automotive Current consumption 2.5 mA typical applications with high stability and reliability Ratiometric output in relation to supply requirements. Typical applications include: voltage (Vdd = 4.75 V...5.25 V) Electronic Stability Control (ESC) Enhanced failure detection features Engine Vibration Measurement o Digitally activated, true self-test by Roll Over proof mass deflection using Suspension electrostatic force Inclination o Memory parity check during power up, and self-test cycle. o Built in connection failure detection Digitally activated, true self-test by proof mass deflection using electrostatic force Wide load drive capability (max. 20 nF) True DC response Qualified according to AEC-Q100 standard 5V supply Gain & Measurement filtering Vout circuitry Sensing EEPROM for calibration element Digital self constants (32 bit, pari ty check) test input ASIC 4 programming lines GND for factory use only Figure 1. Functional block diagram. Murata Electronics Oy 1/11 www.muratamems.fi Doc.nr. 82 1643 00 Rev.B SCA620-EF8H1A Table of Contents SCA620-EF8H1A single axis accelerometer with analog interface .................................... 1 FEATURES .................................................................................................................................... 1 APPLICATIONS .............................................................................................................................. 1 TABLE OF CONTENTS .................................................................................................................... 2 1. Electrical Specifications ............................................................................................ 3 1.1. ABSOLUTE MAXIMUM RATINGS ............................................................................................ 3 1.2. PERFORMANCE CHARACTERISTICS ..................................................................................... 3 1.3. OFFSET AND SENSITIVITY CALIBRATION ................................................................................ 4 1.4. ERROR CALCULATIONS ....................................................................................................... 4 1.5. SUPPLY VOLTAGE ............................................................................................................... 5 1.6. ELECTRICAL CONNECTION .................................................................................................. 6 2. Functional description ............................................................................................... 7 2.1. MEASURING DIRECTIONS .................................................................................................... 7 2.2. VOLTAGE TO ACCELERATION CONVERSION .......................................................................... 7 2.3. RATIOMETRIC OUTPUT ....................................................................................................... 7 2.4. SELFTEST AND FAILURE DETECTION MODES ......................................................................... 7 3. Mechanical Specification .......................................................................................... 9 3.1. DIMENSIONS ...................................................................................................................... 9 4. Application information ............................................................................................ 10 4.1. RECOMMENDED PCB LAY-OUT ......................................................................................... 10 4.2. REFLOW SOLDERING ........................................................................................................ 11 Murata Electronics Oy 2/12 www.muratamems.fi Doc. nr. 82 1643 00 Rev.B