LM3900 ic Quadruple texs Operational Amplifier IC/LM 3900 ic LM3900-PDIP-14

Product Overview

• The LM2900 and LM3900 are quadruple Norton (current-differencing) operational amplifiers.

• These devices are designed to operate from a single power supply over a wide range of voltages, though operation from split supplies is also supported.

• Each device integrates four independent, high-gain, internally frequency-compensated amplifiers.

• They are designed to be interchangeable with the National Semiconductor LM2900 and LM3900, respectively.

Key Features

• Current-Differencing Inputs: The amplifiers operate by differencing input currents at the inverting input terminal, which then flows through an external feedback resistor to generate the output voltage.

• Performance Characteristics:

  • They provide wide bandwidth and a large output voltage swing.

  • The devices feature internal frequency compensation.

  • They offer low input bias current and output short-circuit protection.

• Operational Considerations:

  • The low supply current drain is essentially independent of the supply voltage magnitude.

  • Internal transistors clamp negative input voltages at approximately -0.3 V.

  • Noise immunity is lower than that of standard bipolar amplifiers.

  • Circuit layout is critical, as output-to-noninverting-input coupling can cause oscillations.

Operating Ranges

• LM2900: Characterized for operation from -40°C to 85°C.

• LM3900: Characterized for operation from 0°C to 70°C.