Zero drift CMOS op amps from On Semi

ON Semiconductor has introduced a family of CMOS op amps that are designed to deliver zero drift operation for front-end amplifier circuits and power management designs.

Targeted at industrial, wearables and test equipment applications, the NCS325 and NCS333 op amp devices can be used for accurate motor control feedback and power supply control loops.

These devices are complemented by the NCV333 automotive-qualified (AEC-Q100 grade 1) op amp offering similar functional performance for power train, braking, electronic power steering, valve controls, fuel pump and fuel injection system applications.

Featuring 10µV maximum input offset voltage at ambient temperature and 30nV/°C of offset temperature drift, makes these amplifier devices suitable for low side current sensing and voltage differential measurement on front-end sensor functions.

Minimal voltage variations over temperature along with close to zero offset ensure the efficiency of systems exposed to wide operating temperature ranges without the need for complex software calibration algorithms, resulting in a more manageable design and longer product lifespan.

The NCS325 and NCS333 provide rail-to-rail input and output performance and are optimized for low voltage operation of 1.8 to 5.5V, with quiescent currents of 21µA and 17µA respectively at 3.3V. The devices operate with a gain bandwidth of 350kHz with peak to peak noise down to 1.1µV from 0.1 to 10Hz.

The NCS325 comes in a 3 mm x 1.5 mm 5-pin TSOP package. The NCS333 is offered in a 1.5 mm x 3 mm SOT23-5 package or in a 2mm x 1.25mm SC70-5.

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