Texas Instruments OPAx990 Low-Offset Low-Power Op Amps

Texas Instruments OPAx990 Low-Offset Low-Power Operational Amplifiers (Op Amps) are a family of high voltage (40V) general-purpose operational amplifiers. These devices offer excellent DC precision and AC performance, including rail-to-rail input/output, low offset (±300µV, typ), and low offset drift (±0.6µV/°C, typ). OPAx990 has unique features such as differential and common-mode input voltage range to the supply rail, high short-circuit current (±80mA), high slew rate (4.5V/µs), and shutdown. These features make the OPAx990 an extremely flexible, robust, and high-performance op amp for high-voltage industrial applications. The Texas Instruments OPAx990 family of op amps is available in micro-size packages (such as X2QFN, WSON, and SOT-553), as well as standard packages (such as SOT-23, SOIC, and TSSOP) and are specified from -40°C to 125°C.

Features

  • ±300µV low offset voltage 
  • ±0.6µV/°C low offset voltage drift 
  • 30nV/√Hz at 1kHz low noise 
  • 115dB high common-mode rejection 
  • ±20pA low bias current 
  • Rail-to-rail input and output
  • MUX-friendly/comparator inputs
    • The amplifier operates with differential inputs up to supply rail
    • The amplifier can be used in open-loop or as a comparator
  • 1.1MHz GBW wide bandwidth 
  • 4.5V/µs high slew rate 
  • 120µA per amplifier low quiescent current 
  • ±1.35V to ±20V, 2.7V to 40V wide supply 
  • 78dB at 1.8GHz robust EMIRR performance 
  • Differential and common-mode input voltage range to supply rail

Applications

  • Multiplexed data-acquisition systems
  • Test and measurement equipment
  • ADC driver and reference buffer amplifier
  • Programmable logic controllers
  • High-side and low-side current sensing
  • High precision comparator

Functional Block Diagram

Block Diagram - Texas Instruments OPAx990 Low-Offset Low-Power Op Amps
Publicado: 2019-04-09 | Actualizado: 2024-04-22