ST offering in Wearable Analog and Mixed Signal Portfolio March 2014 Wearable devices attributes Devices being worn for an extended period of time with the user experience significantly enhanced as a result Always on Environment aware Low power Intelligent Compact Connected 2 Market and Applications • Fitness and Wellness – monitor activity and emotions • Activity monitors, foot pods and pedometers, sleep sensors, heart rate monitors • Emotional measurement • Smart clothing, smart watches, heads-up displays • Healthcare and Medical – monitor vital signs • Blood pressure monitors, ECG monitors, continuous glucose monitoring • Insulin pumps, drug delivery products • Infotainment – entertain and enhance lifestyle • Headsets • Smart glasses, smart watches • Industrial – receive/transmit real-time data • Hand-worn terminals, heads-up displays, smart clothing, wearable detection devices 3 ST Offering for Wearable The only company to offer a complete smart system Sensors Secure microcontrollers and memories Ultra-low power connectivity Analog and mixed signal components Smart energy management 4 ST Analog and Mixed signal portfolio for wearable devices The most complete set of building blocks for wearable devices Operational amplifiers Smart reset Analog switches Large portfolio of highly powerefficient op amp in tiny packages Customizable products providing safe and convenient reset Compact single and dual switches for audio and USB Audio amplifiers BlueNRG High-efficiency Class D and G amplifiers for headsets and speakers Bluetooth® smart solution with best-in-class power consumption Current sensors Battery gas gauges MEMS microphone High accuracy current measurement for contactless battery chargers Low-power gas gauge providing very accurate battery life indicators Power-efficient microphone solutions for smarter voicecontrolled devices 5 Wearable devices Analog and mixed signal products partitioning Digital sensors User interface Audio amplifiers Connectivity BlueNRG MCU Operational amplifiers Analog front-end MCU Analog sensors Power management Analog switches MEMS microphones Battery gas gauges Smart reset Current sensors 6 Solutions for Analog Front-End Operational Amplifiers Analog Front-End Analog transducers, getting the best from your sensor Analog sensors need signal transducers to deliver the information to the MCU Analog sensors Analog front-end MCU • Accurate and stable to guarantee the maximum precision of the information • Low power to guarantee a longer user experience • Small to be integrated in the most stylish and thin designs Input offset Input offset voltage voltage drift [µV] [µV] ST offers a dedicated set of op amp to deliver the best match of current consumption and precision, for a wide range of applications OAxNP Supply current [µA] GBP [kHz] Supply voltage [V] 100 5 0.6 8 1.5 – 5.5 50 10 9 120 1.5 – 5.5 1 0.01 28 400 1.8 – 5.5 Very low power OAxMPA Low power precision OAxZHA High precision zero drift http://www.st.com/web/en/catalog/sense_power/FM123/SC61 8 Analog Front-End Signal transducers application: electromyography Analog sensors Analog front-end MCU OAxZHA Raw input signal 50µVpp-5mVpp OAxMPA Conditioned output signal Input signal envelope A low input offset voltage with zero drift amplifier is mandatory. Otherwise the electrodes information would be less accurate or lost Once the signal dynamic has been restored precision and micro power consumption amplifiers are needed before the signal is fed to the MCU OAxZHA family is the perfect match offering: OAxMPA is the perfect match offering: • VIO= 1μV • VIO= 50μV • ΔVIO/ΔT = 0.010μV • ICC = 9μA 9 Analog switches Analog Front-End Switches SEL In portable applications, switches are used to route a great variety of signal – audio to the speaker or the headphones, or other signal from and towards sensors SEL Camera Mic • Guarantee a simple yet efficient system implementation • Compatibility with high-speed signals, for USB 2.0 applications Front Mic ST analog switches line up is meant to cover all the possible signal typologies AS11P2TLRQ Supply voltage [V] Supply current [μA] 1.65 - 4.5 0.1 (max) 1.65 - 4.3 0.05 1.65 - 4.3 0.2 (max) SPDT single AS21P2TLRQ from audio to USB, to fit SPDT dual most of the applications AS21P2THBQ SPDT Dual Off isolation [dB] X-Talk [dB] -75 -80 @ 100Hz @100Hz -72 -66 @ 100 Hz @100 Hz -78 -78 @ 1 MHz @1 MHz http://www.st.com/web/catalog/sense_power/FM1961/SC650 Bandwidth [MHz] 150 55 800 10 Analog Front-End Switches application: dual mode microphones MCU AS11P2TLRQ analog switch can be used to supply the mic with different voltage level so to enable the SEL different operating modes depending on the MCU Vdd_H LDO needs thus enabling voice activity detection features Vdd_L LDO High Supply voltage Vdd_H Normal mode: the acoustical parameters are set to the optimal level for voice control applications Low power voltage Vdd_L Sniffing mode: the device reduces the power consumption at minimum whilst guaranteeing an adequate set of performances for voice activity detection Vdd_H Vdd_L Mic Output MIC output AS11P2TRLQ 11 Solutions for User Interface Audio amplifiers User Interface Answering the user ST offers highly-efficient devices capable of delivering high quality audio into small, low power solutions CLASS G HEADPHONE AMPLIFIER 3W CLASS D MONO SPEAKER AMPLIFIER A22H165 A22H165M (μ-less) • Power supply range 2.3 V - 4.8 V • Low stand by current 0.6 μA A21SP16J Low power Power Low • Vout = 0.8 Vrms into 16 Ω, at 1 % THD+N, VCC = 3.6 V • Low stand by current <1 μA • Pout = 0.8 W into 8 Ω, High Quality High quality • SNR = 100 dB @ 1 kHz at 10 % THD+N, VCC = 3 V • SNR = 85 dB @ 1 kHz • Reduced external BOM • Flip-chip package • Power supply range 2.4 V - 5.5 V • Reduced external BOM Small size Small size • Small flip-chip package http://www.st.com/web/catalog/sense_power/FM125/CL1503/SC977 13 Solutions for Power Management Battery gas gauges Power Management Intelligent battery monitoring ST offers an integrated solution combining current integration and voltage variation over the time thus providing the most accurate battery status measurement GG25LJ - Gas gauge IC with alarm output for wearable devices Accuracy Robustness Flexibility • Coulomb counter mode, voltage mode and mixed mode operations • 0.25 % accuracy battery voltage monitoring • Analog and temperature compensation • Internal temperature sensor • Low battery level alarm output with programmable thresholds • Custom battery OCV curve Low power • 2 µA in standby, 45 µA in operating Small size • Flip chip, 2.01 x 1.37 x 0.6 mm, 10 bumps, 0.4 mm pitch http://www.st.com/web/catalog/sense_power/FM142/CL848/SC274 15 Current sensors Power Management Current sensing Power management in wearable devices Wired or wireless battery chargers Precision current sources from sensors Photovoltaic systems ST current sensing ICs portfolio cover most of the application needs • Independent supply and common mode voltages • Wide supply voltage range • Selectable gains • Low power solutions Common mode operating range [V] Supply voltage range [V] Supply current [μA] Gain [V/V] CS30 2.8 - 30.0 4.0 - 24.0 165 20. 50, 100 fixed internally CS70 2.9 - 70.0 -2.1 - 65.0 2.7 - 5.5 200 20, 50, 100 pin selectable P/N Independent VIO and VCC http://www.st.com/web/en/catalog/sense_power/FM123/SC1264 16 Power Management Current sensing application: wireless battery charging When swimming water pressure can reach up to 5 atm Wearable technology needs to be sealed. All the electrical connections with the external have to be removed Wireless battery charging is mandatory High side current sensing through the transmitter coil to dynamically regulate the charger power output Half bridge gate driver 30 V Mosfets 19V power source CS70 Digital controller power communication Current sensing Transmitter / Base station Receiver / Device 17 Smart reset Power Management Smart resetting Wearable devices getting smarter, software complexity grows exponentially The possibility of and end-user misuse of the product increases accordingly Push simultaneously to reset System crashes are likely to happen and it is mandatory to provide an escape sequence to restart the application and maintain a perception of quality ST smart reset IC line up provide a full set of SR1 # of RST button # of PWR button Supply voltage range [V] Supply current [μA] RST assertion time 1 - 2.0 - 5.5 0.4 fixed at factory 2 - 1.65 - 5.5 1.1 fixed at factory 1 1 1.6 - 5.5 0.6 selectable via ext condenser Smart reset functionalities guaranteeing an escape sequence from OS or application failures SR2 Smart reset SRC0 Smart power and reset http://www.st.com/web/en/catalog/sense_power/FM1946/SC1296 http://www.st.com/web/catalog/sense_power/FM1946/SC1753 18 Solutions for Connectivity BlueNRG Connectivity BlueNRG the Bluetooth® SMART solution Single mode Bluetooth® SMART wireless network processor • 2.4 GHz RF transceiver Integration Flexibility External MCU • Cortex-M0 microcontroller (running the BT single mode protocol) Application • AES 128-bit co-processor BLE profiles • Master and slave single mode BLE (4.0) network processor • On chip non-volatile Flash memory allows OTA BLE-stack upgrade. Stack qualified Application controller interface BLE network processor BlueNRG • ICCRX 7.3 mA Low power • ICCTX 8.2 mA @ 0 dBm • ICCSleep 1.7 µA Application controller interface BLE protocol stack • ICCShutdown 2.5 nA Link layer Small size • Package: QFN32, 5 x 5 x 1 mm • Flip-chip 2.4 GHz radio http://www.st.com/web/catalog/sense_power/FM1968/CL1976/SC1898 20 Solutions for Analog Sensors MEMS microphones MEMS microphones 22 The voice control enablers Voice control is a wide spreading trend across many portable applications, making the interaction easier, faster and smoother It enables fashionable designs by reducing the number of button. Next microphones trend is to allow dual mode operations: Normal mode: the acoustical parameters are set to the optimal level for voice control applications ST MEMS Microphones pave Sniffing mode: the device reduces the power consumption at minimum whilst guaranteeing an adequate set of performances for voice activity detection Sensitivity [dBV] SNR [dB] AOP [dB] -38±3 64 125 Supply voltage range [V] Supply current [μA] Dual mode 150 - 140 - the road toward smarter and MP23AB02B efficient voice-controlled 1.6 - 3.6 devices combining MP23ABE03 * -38±1 64 125 performances, small size and MP23ABE03DM * -38±1 64 125 1.6 - 3.6 140 (normal) 26 (sniff) low power consumption * Q3 2014 http://www.st.com/web/en/catalog/sense_power/FM89/SC1922 23