Volume MEMS and Analog Division (VMA) Automotive applications Anthony BOIMOND June 2015 STMicroelectronics VMA Value Proposition Quality Product portfolio Operational amplifiers Comparators Current sense amplifiers ASSP Watchdog ICs Qualification, characterization and advanced screening according to AEC Q100/Q003, AEC Q001/Q002. FAR/Mu for auto grade products: 0.06 ppm * Automotive grade products emphasized by the Y letter in the order code Supply chain More than 200 Mu of automotive devices delivered yearly grade Serving automotive customers since more than 10 years * Parts per million, based on 0 km returns on AG parts at automotive customers for year 2012 STMicroelectronics - Anthony Boimond 2 Where VMA products can bring added value for SAFETY? Temperature measurement Op Amp TSZ124IYPT ppt - www Electric Power Steering angle measurement Op Amp TSX564IYPT ppt - www Rain and Light sensor Op Amp TSV631IYLT ppt - www Advanced driver assistance system Watchdog timer STWD100Y ppt - www STMicroelectronics - Anthony Boimond 3 CONTEXT Temperature measurement O2 level is translated into current by to guarantee safe operation of Motors, Converters Temperature is measured electrochemical sensor. Current converted to and Electronic Control Units. In Hybrid and Electric Vehicle temperature voltage and then amplified by trans-impedance measurement helps to monitor and maximize battery efficiency. op amp. Feature Vref thermocouple The thermocouple probe creates a reference voltage proportional to temperature, amplified by high accuracy op amp in differential amplifier configuration. ST OFFER HOW DOES IT WORK? VCC Benefit Input offset voltage Vio < 5 µV @25°C Vio < 8 µV -40 to 125°C Excellent measurement without trimming Input offset voltage drift Vio/T 30nV/°C max Stability of measurement versus temperature change Input bias current Iib < 200 pA Compatible with high impedance sensor Op Amp – Zero Drift TSZ124IYPT STMicroelectronics - Anthony Boimond 4 CONTEXT Electric Power Steering angle measurement O2 level is translated intoSteering current byare replacing hydraulics system due to the possibility to Electric Power electrochemical sensor. Current converted to tailor according to driving conditions. In addition, EPS is voltage andsteering-gear then amplified by response trans-impedance a major contributor to fuel-saving efforts. op amp. Vout.cos() Vref Vout Vout.sin() Vref Angle is measured by a resolver. Sine wave is amplified to primary winding of a rotary transformer. Secondary side signal is modified by angle. ST OFFER HOW DOES IT WORK? Feature Benefit High output current Iout = 90mA typ Capability to drive coils Slew rate 1.1V/µs typ Enables high sampling frequency Supply voltage range 3 to 16V High voltage biasing of the magnetic coil Op Amp – 16V CMOS TSX564IYPT STMicroelectronics - Anthony Boimond 5 CONTEXT Rain and Light sensor O2 level is translated current by Rain and lightinto sensors are widely used for automatic mode of windscreen electrochemical sensor. Current converted to wipers andamplified automatic lights. Further applications can include the automatic voltage and then by trans-impedance closing of electric roof and windows or adjustment of dashboard backlight. op amp. Feature 10nF 10M ADC The photodiode generates a reverse current proportional to the amount of light. This current is converted into voltage and amplified by op amp. ST OFFER HOW DOES IT WORK? AN4451 Benefit Input bias current Iib < 10 pA @ 25°C Iib < 100pA @ 125°C Maintains excellent accuracy by not affecting diode current Supply voltage range 1.5 to 5.5V Compatible with wide choice of supplies SOT23-5 Micro package enhances sensor form factor Op Amp – Low power TSV631IYLT STMicroelectronics - Anthony Boimond 6 CONTEXT Advanced Driving Assistance System O2 level is translated current bysystem reliability by monitoring the system for software Watchdog ICsintoimprove electrochemical sensor. Current converted to code errors and hardware failures. This is specially critical for voltage andexecution then amplified by trans-impedance Advanced Driving Assistance Systems paving the way to autonomous vehicles. op amp. 4.7K Vcc EN Vcc WDO Micro controller STWD100 WDI Benefit Variety of available watchdog timeout periods Simple, robust and reliable implementation Supply voltage range 2.7 to 5.5V Compatible with wide choice of supplies SOT23-5 Micro package enhances sensor form factor RST I/O When operating correctly, a vehicle’s systems regularly reset the STWD100 watchdog timer. If the timer exceeds the specified timeout period, an alert is triggered. ST OFFER HOW DOES IT WORK? Feature Watchdog timer STWD100Y STMicroelectronics - Anthony Boimond 7 Where VMA products can bring added value for ENVIRONMENT? Low-side current measurement for motor control Op Amp TSZ124IYPT ppt - www Combustion Pressure Sensor ASSP STPS1IYST ppt NOx sensor for Selective Catalytic Reduction Op Amp TSV912HYDT ppt - www O2 sensor Op Amp TSV522AIYST ppt - www STMicroelectronics - Anthony Boimond 8 CONTEXT Low-side current measurement for motor control O2 level is translated into current by The pervasion of brushless electrochemical sensor. Current converted toDC motors in automotive leads to voltage and then amplified by trans-impedance energy-wasting belts for the transmission of power to sub-systems. op amp. Feature ST OFFER HOW DOES IT WORK? UM1737 The current is measured in each branch of the 3-phase Mosfets bridge. Shunt resistor voltage drop is amplified by high accuracy op amp. removal of Benefit Input offset voltage Vio < 5 µV @25°C Vio < 8 µV -40 to 125°C Minimizes shunt resistor value and cost TSSOP14 Facilitates integration Op Amp – Zero Drift TSZ124IYPT STMicroelectronics - Anthony Boimond 9 CONTEXT O2 sensor O2 level is translated into by or inlet gas concentration of oxygen enables emission Measurement ofcurrent exhaust electrochemical sensor. Current converted to control byamplified adjustment of combustion. Other applications include measurement voltage and then by trans-impedance of the partial pressure of oxygen in passengers breathing gas. op amp. Feature RF RG Benefit Input offset voltage Vio < 800 µV Excellent measurement without trimming Input bias current Iib < 10 pA Compatible with high impedance sensor MiniSO8 Micro package enhances sensor form factor ADC RL AN4348 O2 level is translated into current by the electrochemical sensor. Current is converted into voltage and amplified by op-amp in trans-impedance configuration. ST OFFER HOW DOES IT WORK? 10 Op Amp – Low Power TSV522AIYST STMicroelectronics - Anthony Boimond CONTEXT Cylinder Pressure Sensor O2 level translated into current byof particles and carbon dioxide in exhaust gas requires Theis dramatic reduction electrochemical sensor. Current converted to optimization of combustion. The real-time measurement of cylinder pressure is voltage and then amplified by trans-impedance a great step forward to comply with most demanding standards. op amp. Feature C1 VCC+ supply voltage IN+ OUT AD converter IN- piezo sensor DSP ground Rfb Benefit Low input bias current charge amplifier input stage Compatibility with piezo electric sensor Fully programmable digital signal processing Trimming possible to compensate sensor variations MiniSO8 Small form factor to fit into existing probe output voltage FB VCC- The cylinder pressure is measured by a piezo sensor, converted into electric signal by op amp then digitally processed by programmable DSP. ST OFFER HOW DOES IT WORK? 11 Application Specific Standard Product STPS1IYST ASSP product: check your sales contact for further details STMicroelectronics - Anthony Boimond CONTEXT NOx sensor for Selective Catalytic Reduction Vehicle haveintotocurrent comply with environmental regulations requiring dramatic O2 level is translated by reductionsensor. of Nitrogen Dioxidestoemissions (NOx and NO2). This pressure implies electrochemical Current converted voltage and technologies then amplified by trans-impedance new such as real-time measurement of NOx and selective op amp. catalytic reduction (SCR). VCC Feature AN4348 ADC Vref2 The NOx is measured in the exhaust gas by amperometric or potentiometric method. Aqueous ammonia (also named urea) is injected in the catalyst in order to transform NOx into N2 and water. ST OFFER Vref1 HOW DOES IT WORK? 12 Benefit Low input bias current Iib < 10pA Maintains sensor accuracy Operating temperature -40 to 150°C Compatible with extreme working conditions ESD HBM 5kV Increased reliability in assembly line and during lifetime Op Amp TSV912HYDT STMicroelectronics - Anthony Boimond Where VMA products can bring added value for DRIVER EXPERIENCE? Audio buffer Op Amp TS922IYPT ppt - www Power seat motor current control Current sense amplifier TSC103IYPT ppt - www Pedal angle measurement Op Amp TSX922IYDT ppt - www STMicroelectronics - Anthony Boimond 13 CONTEXT Pedal angle measurement O2 level is translated into Measurement ofcurrent pedalbyposition is mandatory to drive-by-wire, enabling new electrochemical sensor. Current converted to features adaptive cruise control. Other applications include throttle valve voltage and thenas amplified by trans-impedance angle measurement, windows wipers control. op amp. VCC Feature Benefit VCC High Gain Bandwidth Product: 10 MHz Minimum phase shift between sensor and ADC Supply voltage range 4 to 16V Compatible with high voltage sensor ADC The magnetic field created by a permanent magnet is measured by Anisotropic Magneto Resistor included in Wheatstone bridge. Electrical signal is amplified by op amp in difference amplifier configuration. ST OFFER HOW DOES IT WORK? Vref Op Amp – 16V CMOS TSX922IYDT STMicroelectronics - Anthony Boimond 14 CONTEXT Power seat current control O2 level is translated into current by to fine tune the seat position using a joystick. Power seat allow the user electrochemical sensor. Current converted to Advanced featurebycan include automatic recall of user-customized settings. voltage and then amplified trans-impedance Modern cars can use 3 to 6 motors per seat for position adjustment. op amp. AN4304 AN4366 AN4369 Feature VCC ADC The current flowing to the motor is measured through a shunt resistor. The current sense amplifier is directly connected to the shunt, and thanks to internal gain the output pin feedbacks current ST OFFER HOW DOES IT WORK? Rshunt Benefit Input pins sustain: -16 to 75V ESD 2.5kV No protection needed for: Load dump, reversed battery, ESD surges Output voltage accuracy: ±2.5% @25°C ±4% from -40 to 125°C Minimizes shunt value and cost Current sense amplifier TSC103IYPT STMicroelectronics - Anthony Boimond 15 CONTEXT Audio buffer O2 level is translated Audio quality into hascurrent directbyimpact on the end-user perception of quality of the electrochemical sensor. Current converted to vehicle. Audio is now required not only for music, but also for navigation and voltage and then amplified by trans-impedance user vocal interface. op amp. ST OFFER HOW DOES IT WORK? Feature The amplifier is used to buffer and amplify the audio signal. Amplifiers with good audio performances are required. Benefit Low noise: 9 nV/√ Hz Maintain audio quality High output current: 80 mA Ability to drive 32 Ω loads Supply voltage range 2.7 to 12V High level of signal ensures disturbance rejection Op Amp TS922IYPT STMicroelectronics - Anthony Boimond 16 Key messages of this presentation What we would like you to remember VMA Division has devices to address Automotive needs VMA Division has experience in the Automotive market Operational amplifiers, Comparators and High Performance products bring added value visible by the end-user Automotive grade products are highlighted by the Y letter in the order code ST has developed high accuracy op amps to address the automotive needs: TSZ121 has a Vio < 5µV ST has developed 16V CMOS op amps to address the automotive needs: TSX5 TSX6 TSX7 TSX9 series Check our website www.st.com and contact your sales forces for further information on our products STMicroelectronics - Anthony Boimond 17 18 STMicroelectronics - Anthony Boimond 19 Click here or here STMicroelectronics - Anthony Boimond