Increasing Patient Safety with Accurate and Reliable Therapy Devices
Therapy devices provide support and treatment for both critical care and long-term chronic disease. They must operate in ways that are safe and accurate while providing convenient solutions for both the patient and the hospital staff. Therapy devices range from home care products like CPAP to large clinical therapy devices such as dialysis machines, ventilators, and infusion pumps. Our integrated power management, high performance signal chain, protection and consumable authentication solutions allow designs to be highly functional, to be compact with a longer battery life, and to improve patient safety.
The Importance of Isolation in Healthcare Applications
Learn how iCoupler® digital isolators provide a simple solution for connecting patients to a peripheral monitor or PC in a safe and isolated manner.
Secure Authentication for Medical Disposables
Analog Devices’ secure authenticators are easily integrated into medical disposables, increasing patient safety by controlling re-use and preventing counterfeits.
The Basics of Ventilator Systems
Today’s medical ventilator systems need precise measurement of pressure, air flow, humidity and temperature, along with reliable protection to ensure continuous operation.
Interactive Signal Chains
The ADuM4165/ADuM41661 are USB 2.0 port isolators, utilizing Analog Devices, Inc., iCoupler® technology to dynamically support all USB 2.0 data rates; low (1.5 Mbps), full (12 Mbps), or high (480 Mbps), as required. The devices support host isolation with automatic speed negotiation as well as peripheral isolation.
High speed data is retimed for jitter reduction, requiring an external clock signal or crystal input. The ADuM4165 supports the clock or crystal input on the upstream side, and the ADuM4166 supports the clock or crystal input on the downstream side, offering two options to best suit the system design.
The low power standby mode for downstream (Side 2) supports applications with limited available power, such as battery-operated peripherals. The upstream (Side 1) standby current meets USB 2.0 requirements for suspended operation.
The isolators are specified over an extended industrial temperature range of −55°C to +125°C and are available in a 20-lead, wide-body, increased creepage SOIC_IC with 8.3 mm creepage and clearance.
- USB peripheral, USB host, and USB hub isolation
- Electronic test and measurement equipment
- Medical devices and integrated PCs
- Industrial PCs and isolated USB ports for debug or upgrade
- USB isolator modules and USB cable isolators
1 Protected by U.S. Patents 7,075,329; 8,432,182; 8,525,547; and 8,564,327. Other patents are pending.
Internet of Things (IoT)
The MAX31889 operates from a 1.7V to 3.6V supply voltage, and is a low-power, high-accuracy digital temperature sensor with ±0.25°C accuracy from -20°C to +105°C and ± 0.65°C accuracy from -40°C to +125°C. The MAX31889 has 16-bit resolution (0.005°C).
The device uses a standard I2C serial interface to communicate with a host controller. Two GPIO pins are available. GPIO1 can be configured to trigger a temperature converison, while GPIO0 can be configured to generate an interrupt for selectable status bits.
The MAX31889 includes a 32-word FIFO for the temperature data and also includes high and low threshold digital temperature alarms. The device is available in a 2mm x 2mm x 0.8mm, 6-pin, µDFN package.
- Internet of Things (IoT) Sensors
- Precision Temperature Monitoring
- RTD Replacement
The DS28E30 provides a highly secure and easily deployed turnkey authentication solution based on the FIPS-186 ECDSA standard. The secure authenticator combines ECDSA challenge and response authentication with secured EEPROM for the storage of the keys and user data.
The device provides a core set of cryptographic tools derived from integrated blocks including an asymmetric hardware engine, a true random number generator (TRNG), 3Kb of secure EEPROM, a decrement-only counter, and a unique 64-bit ROM identification number (ROM ID). The ECC public/private key capabilities operate from the NIST-defined P-256 curve to provide a FIPS 186-compliant ECDSA signature generation function to support a bidirectional asymmetric key authentication model. The unique ROM ID is used as a fundamental input parameter for cryptographic operations and serves as an electronic serial number within the application. In addition, authenticity of the chip can be verified with a Maxim-provided public key certificate. The device communicates over the single-contact 1-Wire® bus at overdrive speed. The communication follows the 1-Wire protocol with the ROM ID acting as a node address in the case of a multidevice 1-Wire network.
- Accessory and Peripheral Secure Authentication
- Battery Authentication and Charge Cycle Tracking
- Medical Tools/Accessories Authentication and Calibration
The ADN4622/ADN4624 are quad-channel, signal isolated, low-voltage differential signaling (LVDS) buffers that operate at up to 2.5 Gbps with very low jitter. The devices integrate Analog Devices, Inc., iCoupler® technology, enhanced for high-speed operation to provide drop-in galvanic isolation of LVDS signal chains. AC coupling and/or level shifting to the LVDS receivers and from the LVDS drivers allows isolation of other high-speed signals such as current-mode logic (CML).
The ADN4622/ADN4624 include a refresh mechanism to monitor the input and output states and ensure they remain the same in the absence of data transitions. For lower power consumption and high-speed operation with low jitter, the LVDS and isolator circuits rely on 1.8 V supplies. The ADN4622/ADN4624 are fully specified over a wide industrial temperature range and are available in a 28-lead, wide-body, finer pitch SOIC_W_FP package with 8.3 mm creepage and clearance (for 5.7 kV rms or 8 kVPEAK surge and impulse voltages and reinforced insulation at AC mains voltages) or 6 mm × 6 mm LFCSP package with 1.27 mm creepage and clearance (for basic/functional isolation).
- Isolated video and imaging data
- Analog front-end isolation
- Data plane isolation
- Isolated high speed clock and data links
- Multi-gigabit SERDES
- Board-to-board optical replacement (for example, short reach fiber)
Precision Wide Bandwidth
The AD7745 has one capacitance input channel, while the AD7746 has two channels. Each channel can be configured as single-ended or differential. The AD7745/AD7746 are designed for floating capacitive sensors. For capacitive sensors with one plate connected to ground, the AD7747 is recommended.
The parts have an on-chip temperature sensor with a resolution of 0.1°C and accuracy of ±2°C. The on-chip voltage reference and the on-chip clock generator eliminate the need for any external components in capacitive sensor applications. The parts have a standard voltage input, which together with the differential reference input allows easy interface to an external temperature sensor, such as an RTD, thermistor, or diode.
The AD7745/AD7746 have a 2-wire, I2C-compatible serial interface. Both parts can operate with a single power supply from 2.7 V to 5.25 V. They are specified over the automotive temperature range of –40°C to +125°C and are housed in a 16-lead TSSOP package.
Automotive, Industrial and Medical Systems for:
- Pressure Measurement
- Position Sensors
- Level Sensors
- Humidity Sensors
- Impurity Detection
What Are the Best Applications for IoT in the New World of IC Power Management?
- Creepage Requirements for Medical Applications
- Medical Device Sterilization Methods and Information
- How Continuous Positive Airway Pressure (CPAP) Respiratory Ventilation Systems Function
- Introduction to Ventilators and Ventilation Rate Measurements