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New Instrumentation Amplifier and High-Accuracy Real-Time Clock

Maxim Integrated’s MAX41400 Amplifier enhances sensor accuracy by 4x and the MAX31343 RTC offers unparalleled accuracy at ±5ppm

When designing IoT and battery-operated sensors, engineers must develop systems that provide longer battery life while accurately measuring real-world voltages, forces and pressures. Power budgets require these sensors to achieve precision on the first measurement, with little to no calibration. Furthermore, industrial and internet of things (IoT) applications require these sensors to withstand extreme physical conditions of temperature, humidity and mechanical abuse. In order to achieve extended battery like and high accuracy, Maxim Integrated (now part of Analog Devices) have released three new analog IC's, the MAX41400 Instrumentation Amplifier, the MAX40108 precision Operational Amplifier and the MAX31343 Real Time Clock (RTC).

New Instrumentation Amplifier and High-Accuracy Real-Time Clock

The MAX41400 instrumentation amplifier enhances sensor system accuracy by 4x and extends battery life by 55 percent compared to the altrenative offerings. The MAX41400 provides low offset of 25µV, low noise and programmable gain with only 65µA current consumption.

The MAX40108 is the lowest-voltage precision operational amplifier in its class, operating with supplies as low as 0.9V. The combination of low operational supply voltage, lower power consumption and 25.5µA quiescent current allows engineers to double sensor battery life.

The MAX31343 I²C RTC with integrated MEMS oscillator provides timekeeping accuracy of ±5ppm, substantially better than the similiar RTC's, plus robust protection afforded by a MEMS resonator. With its integrated resonator, the MAX31343 eliminates crystal mechanical failures and enables the smallest WLP compared to other products in the market.

“The growth of industrial and healthcare IoT applications is driving a growing need for enhanced battery life management and accuracy of measurement to support reduction of power consumption and availability of devices,” said Adam Davidson, analyst at Omdia. “These three products represent the best in our Essential Analog offering,” said Vickram Vathulya, vice president of Core Products Group at Maxim Integrated. “Maxim's mission continues to be providing engineers the finest products to sense and interface with the analog world. These solutions provide superb accuracy and low power consumption for the most demanding sensor applications.”

Features of the MAX41400 Instrumentation Amplifier include:

  • Supply Voltage Range: 1.7V to 3.6V
  • Very Low 25µV (max) Input Offset Voltage
  • Low 65µA Quiescent Current
  • Rail-to-Rail Inputs and Outputs
    • >100dB at 1800MHz, 2400MHz
    • >90dB at 400MHz, 900MHz
  • 28kHz, -3dB Bandwidth
  • Eight Input-Selectable Fixed-Gain Options
    • 10V/V, 20V/V, 40V/V, 80V/V, 100V/V, 150V/V, 200V/V, and 250V/V
  • Power-Saving Shutdown Mode

For more information on the MAX41400 Instrumentation Amplifier, visit the Analog Devices website at Analog Devices MAX41400 product page

Features of the MAX40108 Precision Operational Amplifier include:

  • Supply Voltage Range: 0.9V to 3.6V
  • Low 25.5µA Quiescent Current
  • Very Low 1µV (typ) Input Offset Voltage
  • Rail-to-Rail Inputs and Outputs
  • Internal EMI Rejection
  • 168kHz GBW
  • Low Input Bias Current
  • Power-Saving Shutdown Mode

For more information on the MAX40108 Precision Operational Amplifier, visit the Analog Devices website at Analog Devices MAX40108 product page

Features of the MAX31434 Real Time Clock include:

  • Highly Accurate RTC with Integrated MEMS Resonator Completely Manages All Timekeeping Functions
    • Complete Clock Calendar Functionality Including Seconds, Minutes, Hours, Day, Date, Month, Year, and Century with Leap-Year Compensation up to Year 2199
    • Timekeeping Accuracy ±5ppm (±0.432 second/day) from -40°C to +85°C
    • Two Time-of-Day Alarms
    • Temperature-Compensated Programmable SquareWave Output
    • Uncompensated Programmable Clock Outputs
    • Automatically Switch over to Backup Battery or Supercapacitor on Power-Fail
    • Digital Temperature Sensor with ±3°C Accuracy
    • +1.6V to +5.5V Supply Voltage
  • 64-Byte RAM for User Data Storage
  • Simple Serial Interface Connects to Most Microcontrollers
    • I²C Interface
  • Battery-Backup Input for Continuous Timekeeping
  • Low-Power Operation Extends Battery-Backup Runtime
  • Operating Temperature Range: -40°C to +85°C

For more information on the MAX31434 Real Time Clock, visit the Analog Devices website at Analog Devices MAX31434 product page.

The Analog Devices website address is www.analog.com
[Reprinted with kind permission from Maxim Integrated - Release Date 22nd February, 2021]