1-Wire® Medical Solutions: Calibrate, Authenticate and Control Peripherals Over a Single-Contact Interface
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Today’s medical instruments use a wide variety of add-on peripherals such as probes, sensors, and consumables that perform specific invasive or non-invasive functions. Most of these peripherals have either a single use cycle (disposable) or limited use cycle for hygienic and reliability reasons. Due to their short use cycles, consumable peripherals represent an important revenue stream for medical equipment manufacturers.
It is critical then for OEMs to lock out aftermarket clones to protect their revenue and reputation. Towards this end, they have increasingly begun to embed electronics into peripherals for identification, storage of calibration data, usage and expiration control.
Because peripherals are typically attached to the main monitoring equipment through an electromechanical connector with limited pins, system designers must add this peripheral functionality with minimal interconnect. Additionally, sensors and consumables are manufactured in various shapes and sizes, so they sometimes require innovative packaging solutions when standard IC packaging won’t fit.
The 1-Wire® remedy for medical peripheral design
Maxim’s 1-Wire product line provides the interface, performance and packaging required to embed this increased functionality into medical sensors, probes and consumables. Most importantly, Maxim understands that these peripherals are the lifeblood of medical companies. The company has served this market for over 15 years with secure products that help customers protect their peripherals and revenue using only a single interface contact.
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1-Wire features and benefits
- Single dedicated contact minimizes impact of instrument-to-sensor interface.
- Various densities of EEPROM and OTP memory allow for nonvolatile storage of sensor characteristics and usage control data.
- SHA-1-based crypto-strong authentication enables instrument to securely test for OEM-authentic consumables.
- ±8kV/±15kV typical ESD performance (IEC 60001-4-2) eliminates need to add discrete ESD protection.
- Custom packaging solutions and modules are available