ON Semiconductor – Op amps offer very high output stability over time and temperature

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The NCS333 and NCS325 from ON Semiconductor are precision operational amplifiers with a very low maximum input-offset voltage of 10μV at ambient temperature, enabling them to achieve high output accuracy. They also feature near-zero drift over time and temperature.

When used in motor-control feedback and power-supply control loops, the NCS325 and NCS333 op amp devices provide for very high accuracy, thereby helping designers to achieve higher system efficiency. The devices are complemented by the NCV333 AEC-Q100 qualified op amp offering similar functional performance for use in automotive applications.

Featuring a typical 30nV/°C of offset temperature drift, these op amps are very well suited to low-side current sensing and voltage- differential measurement in front-end sensor functions. The very low drift and offset values ensure that their outputs remain stable over a wide operating-temperature range without the need for complex software-calibration algorithms, resulting in easier system implementation and a longer product lifespan.

The NCS325 and NCS333 provide rail-to- rail input and output performance, and operate from a power-supply voltage ranging from 1.8V to 5.5V. The devices offer a gain bandwidth of 350kHz. Peak-to-peak noise is very low at 1.1μV from 0.1Hz to 10Hz.

The NCS333 and NCS325 offer an outstanding common-mode rejection ratio without the cross-over associated with traditional complementary input stages. This design results in superior performance when driving ADCs, avoiding degradation of their differential linearity.

FEATURES

  • 17μA quiescent current at 3.3V (NCS333)
  • 21μA quiescent current at 3.3V (NCS325)
  • 100μs turn-on time
  • Internal EMI filtering (NCS325 only)

APPLICATIONS

  • Temperature measurement
  • Transducer applications
  • Current sensing

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