Analog Devices Inc. ADA4500-2 Crossover Distortion Amplifiers

Analog Devices ADA4500-2 zero input crossover distortion amplifiers are designed as 10MHz, 14.5nV/√Hz, low-power amplifiers featuring rail-to-rail input and output swings while operating from a 2.7V to 5.5V single power supply. ADA4500-2 is also compatible with industry-standard nominal voltages of +3.0V, +3.3V, +5.0V, and ±2.5V.

Employing a novel zero-crossover distortion circuit topology, ADA4500-2 amplifiers provide high linearity over the full, rail-to-rail input common-mode range, with excellent power supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR) performance without the crossover distortion seen with the traditional complementary rail-to-rail input stage. The resulting op-amps also have excellent precision, wide bandwidth, and very low bias current. 

ADA4500-2's combination of features makes it an ideal choice for precision sensor applications because it minimizes errors due to power supply variation and maintains high CMRR over the full input voltage range. The ADA4500-2 is also an excellent amplifier for driving analog-to-digital converters (ADCs) because the output does not distort with the common-mode voltage, which enables the ADC to use its full input voltage range, maximizing the dynamic range of the conversion subsystem.

Features

  • Rail-to-rail input and output
  • PSRR: 98dB minimum
  • CMRR: 95dB minimum
  • Offset voltage: 120μV maximum
  • Single-supply operation: 2.7V to 5.5V
  • Dual-supply operation: ±1.35V to ±2.75V
  • Wide bandwidth: 10MHz
  • Low noise
  • 2μV p-p from 0.1Hz to 10Hz
  • 14.5nV/√Hz @ 1kHz
  • Low input bias current: 2pA maximum

Applications

  • Pressure and position sensors
  • Remote security
  • Medical monitors
  • Process controls
  • Hazard detectors
  • Photodiode applications
Publicado: 2015-09-10 | Atualizado: 2022-03-11