Measurement ICs double battery life and have highest accuracy, claims Maxim
Three ICs from Maxim Integrated allow designers to achieve double the battery life, while offering protection and what is claimed to be the highest accuracy for IoT, industrial and healthcare applications.
The trio are the MAX41400 instrumentation amplifier, the MAX40108 precision operational amplifier and the MAX31343 real time clock (RTC) with integrated MEMS oscillator.
IoT and battery-operated sensors require the development of systems that provide longer battery life while accurately measuring real world voltages, forces and pressures. Battery life is extended from the previous limit of 7.4 hours to 11.5 hours. Power budgets demand these sensors achieve precision on the first measurement, with little to no calibration. An added challenge is that for industrial and IoT applications, these sensors must withstand extreme physical conditions of temperature, humidity and mechanical abuse.
The MAX41400 instrumentation amplifier enhances sensor system accuracy by a factor of four, and extends battery life by 55 per cent compared to the closest competitive offering, claims Maxim. It provides low offset of 25 microV, low noise and programmable gain with only 65 microA current consumption.
The MAX40108 is claimed to be the lowest voltage precision operational amplifier in its class, operating with supplies as low as 0.9V. This low operational supply voltage is combined with a lower power consumption and 25.5 microA quiescent current which allows engineers to double sensor battery life, Maxim explains.
The MAX31343 I²C RTC with integrated MEMS oscillator provides timekeeping accuracy of ±5ppm; a figure “substantially better than the closest competitor”, according to Maxim. An integrated MEMS resonator also offers robust protection, i.e. shock resistance of above 2900G and vibration resistance of above 50G to eliminate crystal mechanical failures.
All these products offer multiple and small form factor package choices.
The MAX41400 is available now, and an evaluation kit, the MAX41400EVKIT#, is also available.
The MAX40108 is available from the company and its authorised distributors, together with the MAX40108EVKIT# evaluation kit.
The MAX31343 and MAX31343SHLD# evaluation kit are also available.