LM3900MX

Instrumentation, Op Amps, Buffer Amps Overview

The LM3900MX is a quad current-differencing amplifier manufactured by National Semiconductor, housed in a 14-SOIC surface-mount package. It features four independent circuits with a slew rate of 20V/µs and a gain-bandwidth product of 2.5 MHz. The device operates with an input bias current of 300 nA and draws 6.2 mA of supply current across all channels. It supports a supply voltage span from 4.4 V to 32 V and functions within an operating temperature range of 0°C to 70°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Quad current-differencing architecture providing four independent amplifier channels
• Surface-mount 14-SOIC package design for compact integration
• Wide single-supply voltage operation capability

Instrumentation, Op Amps, Buffer Amps Applications

• Current-mode signal processing circuits
• Voltage-to-current conversion stages
• Integrator and differentiator implementations

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the manufacturer designation as National Semiconductor, now part of Texas Instruments, to ensure component authenticity. Confirm the suffix 'MX' corresponds to the 14-SOIC surface-mount package variant rather than through-hole options. Validate that the specified electrical parameters match the required operational conditions for your specific circuit design before finalizing procurement.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when a quad amplifier configuration with current-differencing inputs is required. Ensure the application utilizes single-supply voltages between 4.4 V and 32 V. Consider the 14-SOIC package constraints for PCB layout and thermal management. Verify that the 2.5 MHz gain-bandwidth product meets the frequency response requirements of the intended signal processing tasks.

Instrumentation, Op Amps, Buffer Amps Part Context

The LM3900 series represents a family of current-differencing amplifiers distinct from standard voltage-feedback operational amplifiers. The LM3900MX specifically denotes the surface-mount version of this quad amplifier. This component type is characterized by its unique input stage design, which accepts current signals directly, making it suitable for specialized analog applications where traditional op-amps are less efficient.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.