Healthcare products for diagnostic and therapy applications frequently incorporate sensors, motors, pumps, and actuators. Reliability, precision, accuracy and cost are important design considerations in this market. We offer a wide range of analog and power ICs for driving and controlling the sensors and actuators within these products.
Fluid Flow Monitoring
Fluid monitoring in medical applications is usually performed using two or more pressure sensor transducers and then monitoring and comparing the measured pressures to determine if there is fluid flow through a tube. In medical applications specialized transducers called “occlusion sensors” are used to detect minute changes in pressure within medical tubing.
Power and Battery
Many medical applications, especially those that maintain communications with remote sensors and actuators, also need isolated power domains to mitigate the effects of transients, electro-magnetic interference (EMI), and differing ground potentials.
Pump and Motor Control and Monitoring
Many medical applications require precise control of electric motors used to pump fluids. Peristaltic and syringe pump mechanisms are used for the critical blood circuit and therapy injection applications. These pumps are usually driven by stepper motors or BLDC motors under system control.
A continuous positive airway pressure (CPAP) device uses an electric blower that spins at about 30krpm to develop a positive pressure. The motor must change speeds rapidly so the windings must be monitored to prevent overheating.
Pressure and Temperature Sensing
Most diagnostic and therapy medical equipment requires the ability to sense pressure and temperature. The pressure and temperature ranges to be measured are usually narrow compared to industrial applications, so signal chains that employ 10 to 12 bit data converters are usually sufficient. However, accuracy remains very important in these applications.
4.5 to 60V, 5A, High-Efficiency Step-Down ConverterMAX17506
Includes integrated high-side MOSFET with output from 0.9V up to 0.9 x VIN in a 5mm x 5mm TQFN
High-Speed, Half-Bridge MOSFET DriversMAX5064
125V half-bridge, n-channel MOSFET drivers drive high-and low-side MOSFETs in high-voltage applications.
12 Bit & 10 Bit Multichannel Low-Power, High Speed, SAR ADCsMAX11135
Family of 12-/10-/8-bit 500 ksps SAR ADC's with industry-leading 1.5MHz , full linear bandwidth, low-power, serial output, and SampleSet channel sequencing.
Stand-Alone OCV-Based Fuel GaugeDS2786B
This IC estimates available capacity for rechargeable Li-ion (Li+) and Li+ polymer batteries based on the cell voltage in the open-circuit state following a relaxation period.
Our diagnostic and therapy solutions provide additional information on designing healthcare products, including examples and block diagrams of typical diagnostic and therapy designs: