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Medical Applications Guide imaging health fitness TI HealthTech Engineering components for life. Applications Guide www.ti.com/healthtech2013 TI HealthTech ➔ Table of Contents Disclaimer Introduction . 3 TI products are not authorized for use in safety-critical applications (such as Health life support) where a failure of the TI Overview . 4 product would reasonably be expected Design Considerations . 4 to cause severe personal injury or Blood Pressure Monitors . 9 death, unless TI and the customer have Blood Glucose and Other Diagnostic Meters . 10 executed an agreement specifically Asset Security/Authentication . 14 governing such use . The customer shall fully indemnify TI and its represent - Patient Monitoring . 15 atives against any damages arising out Electrocardiogram (ECG)/Portable ECG and Electroencephalogram (EEG) . 21 of the unauthorized use of TI products Pulse Oximeter . 37 in such safety-critical applications . The Ventilator . 48 customer shall ensure that it has all Continuous Positive Airway Pressure (CPAP) . 55 necessary expertise in the safety and Dialysis Machine . 60 regulatory ramifications of its applica- Infusion Pump . 63 tions and the customer shall be solely Automated External Defibrillator (AED) . 66 responsible for compliance with all legal, Health Component Recommendations . 71 regulatory and safety-related require- ments concerning its products and Imaging any use of TI products in customer’s Overview . 74 applications, notwithstanding any Ultrasound . 74 applications-related information or Computed Tomography (CT) Scanners . 86 support that may be provided by TI . Magnetic Resonance Imaging (MRI) . 91 Digital X-Ray . 97 Positron Emission Tomography (PET) Scanners . 102 Optical 3-D Surface Scanners . 107 Hyperspectral Imaging . 108 Endoscopes . 109 DLP® Technology . 118 TI’s HealthTech Applications Medical Imaging Toolkit . 120 Guides available for individual download: Fitness Overview . 121 • Health Heart Rate/Fitness Monitoring Systems . 121 Weight Scale/Body Composition . 122 • Imaging System Support Products . 123 • Fitness Connectivity Solutions . 125 Medical USB Platform . 126 Telehealth Aggregator Manager . 127 Visit: Wireless Connectivity Solutions . 128 www.ti.com/healthtechguides RFID and Tag-it™ . 133 Wired Solutions . 135 Component Recommendations for Fitness . 136 Power Management for HealthTech Power Management for HealthTech . 137 Component Recommendations . 143 Resources Enhanced Products/Die and Wafer Sales Solutions . 149 TI Worldwide Technical Support . 150 TI HealthTech 2 Texas Instruments 2013 TI HealthTech ➔ Introduction HealthTech Overview reliability and responsive service . You will find component suggestions TI HealthTech is passionate about TI HealthTech’s broad portfolio, and support for your healthcare developing innovative components backed by the resources of the TI application design in the following to promote healthier lives, and is global enterprise, is the world’s largest segments, which are also available committed to continually advancing producer of analog and embedded at www .ti .com/healthtechguides for the landscape for healthcare around processors and the single most individual chapter download: the world . With unequaled expertise experienced source for healthcare in analog and embedded processing, components . • Health TI HealthTech provides superior • Fitness components for health, fitness and This latest guide makes it easier than • Imaging medical imaging, making healthcare ever for you to explore TI HealthTech’s more flexible, affordable and IC portfolio for healthcare applications . accessible . We feature a broad array of compre- hensive system block diagrams, TI HealthTech strives to build selection tables and key design tools long-lasting relationships that benefit to help you accelerate innovation . customers and their products to the highest degree, focusing on quality, Wireless Interface The Real Data Connectivity World Amplifier Converter Temperature Pressure Position Speed Power Embedded Management Processing Flow Humidity Sound Light Data Identification Amplifier Converter Clocks & Timing Logic Analog connects the digital and real worlds. TI HealthTech 3 Texas Instruments 2013 Health ➔ Overview Health Overview Traditional clinical equipment such TI features a broad array of More than ever, TI HealthTech is as digital stethoscopes, patient comprehensive system block passionate about taking professional monitoring, ECG, EEG, and pulse diagrams, selection tables and key treatments beyond the hospital and oximetry have all become more design tools to help you accelerate into physician offices and patient portable through improvements in innovation . TI HealthTech’s broad homes . Both clinical and home health battery and battery management portfolio, backed by the resources equipments, such as pulse oximetry technologies, and the proliferation of of the TI global enterprise, is the and blood glucose meters, are wireless communications technologies world’s largest producer of analog challenged to extend battery life like Bluetooth® and ZigBee® . The and embedded processors and the and make devices more wearable addition of features like touch screen single most experienced source for and accessible – without sacrificing control and audio feedback have taken healthcare components in both accuracy or reliability . By developing away the complicated mix of knobs clinical and home health applications . innovative ways to increase integration, and dials and replaced them with lower noise, and lower power menu-driven displays and user consumption, TI components make prompts . healthcare more flexible, affordable and accessible . ➔ Design Considerations Given the broad nature of this medical DSP-class performance- and motor- Isolation subsegment, design considerations control optimized on-chip peripherals TI digital isolators have logic input and are broken down into some popular of C2000 controllers enable users to output buffers separated by TI’s silicon motor control and sensor interface easily implement advanced algorithms dioxide (SiO2) isolation barrier, providing applications . Simple system block dia- such as sensorless vector control of 4 kV of isolation . Used in conjunction grams are provided along with analog three-phase motors . The C2000 DSC with isolated power supplies, these and embedded processing solutions . family offers software-compatible devices block high voltage, isolate controllers ranging from the low-cost grounds, and prevent noise currents Referring to the motor control block F28016 to the industry’s first floating- from entering the local ground and diagram example, small electrome- point DSC, the TMS320F28335 . interfering with or damaging sensitive chanical drives can include solenoid circuitry . drives, single-direction small electro- Motor/Solenoid Drive Circuit mechanical drives include solenoid PWM drivers like the 1 .2-A DRV104 are Designers might consider the new drives, single-direction DC, compatible with resistive or inductive ISO1050, which is a galvanically bidirectional DC or brushless DC loads for driving solenoids or valves isolated CAN transceiver that meets systems and are typically sized from a single supply . New PWM power or exceeds the specifications of the according to their frame size and power drivers such as the DRV8811 provide ISO11898 standard, with IEC 61010-1 in watts . Digital controllers, software, an integrated stepper motor solution approval pending . As a CAN trans- and complementary analog and digital that includes two H-bridge drivers as ceiver, the ISO1050 provides differen- solutions from TI can help solve most well as microstepping indexer logic for tial transmit capability to the bus and drive requirements . stepper control . For higher drive cur- differential receive capability to a CAN rents, try a high-voltage, high-current controller at signaling rates up to Core Subsystems op-amp with a current limit between 1 megabit per second (Mbps) . 0 and 5 A (OPA548) externally con- Controllers trolled via a resistor/potentiometer or a Designed for harsh environments, the TI offers a range of solutions for the current-out DAC like the DAC7811 or ISO1050 provides additional features control processor, from the ultra-low DAC8811 . MOSFET drivers such as such as failsafe outputs, 50-kV/µs power MSP430 microcontroller to the UCC37321 or the UCC37323 can drive transient immunity, and the 3 .3-V inputs C2000™ and Tiva™ C Series ARM® small motors directly or drive power are 5V-tolerant . Cortex-M4F microcontrollers . The devices such as MOSFETs or IGBTs . right controller can optimize motor drive efficiency, improve reliability and lower overall system costs . The 32-bit TI HealthTech 4 Texas Instruments 2013 Health ➔ Design Considerations Controller Interface Motion Feedback ADCs like the ADS7861/ADS7864 or USB, RS-232 or RS-422 are adequate Isolated delta-sigma modulators ADS8361/ADS8364 provide four- or for many systems . RS-485 signal- (AMC1203/AMC1210) are ideal for six-channel simultaneous current ing may be bundled with protocols shunt measurements to flatten glitches sampling . The INA19x (x = 3 to 8) and such as Profibus, Interbus, Modbus and increase current feedback resolu- INA20x (x = 1 to 9) provide wide com- or BACnet, each tailored for the spe- tion . These modulators are easy to use mon-mode voltages and are capable cific requirements of the end user . and provide oversampling and filtering of both low-side and high-side current Sometimes CAN or Ethernet/IP for an encoder . For measuring shunt monitoring
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