运算放大器(Op Amps)

Precision Op Amps

ON Semiconductor's portfolio of precision op amps with offset voltage accuracy of less than 1 mV.

Low Power Op Amps

ON Semiconductor's portfolio of low power op amps with quiescent current ≤ 250 µA.

Zero Drift Op Amps

ON Semiconductor's portfolio of zero drift op amps with offset voltage drift of less than 0.1 µV/℃.

Automotive Op Amps

ON Semiconductor's portfolio of automtoive qualified operational amplifiers.

NCS20282: Dual Operational Amplifier, 7 MHz, with Enable and CSP packaging

• World’s Smallest Dual Operational Amplifier
• Offset Voltage 1.5 mV max
• Low I_q of 1300 µA max over full temperature
• Small Packaging, dual channels in 1 mm x 1 mm CSP

NCS20166: Precision Operational Amplifier, 10 MHz

• Bandwidth: 10 MHz
• Voltage Noise Density: 10 nV/√Hz
• Low Input Bias Current: 600 pA max over temperature
• Automotive qualified options are available under NCV prefix

NCS21911: Precision Operational Amplifier, 2 MHz

• Low Offset Drift: 0.085 µV/°C max
• High CMRR of 140 dB max
• High PSRR of 130 dB max
• Automotive qualified options are available under NCV prefix

Application Note

Zero-Drift Precision Op Amps: Advantages and Limitations of the Chopper-Stabilized Architecture

Zero−drift precision op amps are specialized op amps designed for applications that require high output accuracy due to small differential voltages. Not only do they feature low input offset voltage, but they also have high CMRR, high PSRR, high open loop gain, and low drift over temperature and time. These features make them ideal for applications such as low−side current sensing and sensor interface, particularly with very small differential signals.

Blog

Operational Amplifiers - Application Needs for Precision in Industrial Control

The evolution of electronic control of industrial functions requires the ability to measure and precisely control equipment position, angles and rotation. These applications, such as assembly robots, surface and valve actuators, have the potential to not only provide higher quality finished products but to also improve human safety by removing workers from harsh environments.

Blog

Capacitive Loads and Phase Margin

Driving a capacitive load with an op amp can be tricky. If the load capacitance is too high, this can cause instability, making the op amp output oscillate. Having adequate phase margin is essential for stability. As load capacitance increases, phase margin decreases. If you are seeing an op amp output oscillate, the first thing to look at is the load.