Amplifier ICs

High Performance, Low Power, Rail-to-Rail I/O Amplifier for Battery Powered Instrumentation

Limited headroom, battery voltage fluctuations, and variable inputs can make it difficult to achieve accurate measurements in portable systems such as glucose meters. ADI's ADA4505-2 offers high input linearity with zero-input crossover distortion (PSRR is 100 dB minimum, CMRR is 105 dB typical), simplifying the task considerably. Consuming only 10 µA per amplifier, the ADA4505-2 extends battery life and is virtually immune to battery dropout voltage. The high linearity response eliminates the main source of dc errors that cannot be software calibrated, improving system accuracy. The ADA4505-2 operates at 1.8 V to 5 V single supplies and is specified from –40°C to +125°C. It is ADA4505-2 available in 8-lead MSOP and LFCSP packages.


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Integrated, Gain-Programmable Instrumentation Amplifier Reduces Size and Cost of Precision Front Ends

The AD8295 integrates one precision instrumentational amplifier, two operational amplifiers, and two precision matched resistors on a single 4 mm × 4 mm LFCSP package. It offers designers the flexibility to choose filtering, differential output, or offset adjustment as needed. Filter requirements are simplified by maintaining a minimum CMRR of 80 dB @ 10 kHz (G = 1), enabling the AD8295 to reject wideband interference and line harmonics. The AD8295 is specified over the entire industrial temperature range of –40°C to +85°C and operates on a wide supply range of ±2.3 V to ±18 V. It is available in a 16-lead LFCSP package.


AD8295 Features

  • Gain = 1 to 1000, gain set with one resistor
  • Input bias current: 1 nA max
  • 8 nV/√Hz RTI noise @ 1 kHz
  • CMRR: 80 dB (G = 1), 120 dB (G = 100)
  • Supply current: 2 mA max

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