Replacement Components to LMV324IDRE4: BU7487F-E2 and NCV20034DR2G

Original Part

LMV324IDRE4

Texas Instruments

Standard Amplifier 4 Circuit Rail-to-Rail 14-SOIC

Alternative Part

BU7487F-E2

Rohm Semiconductor

CMOS Amplifier 4 Circuit Rail-to-Rail 14-SOP

NCV20034DR2G

onsemi

Standard (General Purpose) Amplifier 4 Circuit Rail-to-Rail 14-SOIC

1. Substitution Conclusion for BU7487F-E2 The feasibility of substituting BU7487F-E2 for LMV324IDRE4 is low and warrants careful evaluation. Its most significant advantages are its extremely high input impedance (1pA input bias current vs. 15nA) and superior bandwidth and slew rate (10MHz, 10V/µs vs. 1MHz, 1V/µs). This makes it a better performer in applications with very high source impedance or those requiring higher frequency signal processing. Key limitations, however, preclude its use as a drop-in replacement. Its quiescent current is nearly an order of magnitude higher (6mA total vs. 1.64mA), which is unacceptable for battery-powered or low-power designs. Furthermore, its output drive capability is weaker (12mA vs. 40mA) and may be insufficient to drive the same load. A minor package width difference (4.40mm vs. 3.90mm) could also affect PCB compatibility. This device is only suitable for applications where power consumption is not critical but ultra-high input impedance and speed are specifically required.

2. Substitution Conclusion for NCV20034DR2G NCV20034DR2G presents a high-feasibility alternative to LMV324IDRE4 and is a superior choice for a performance upgrade. While retaining the fundamental multi-channel, rail-to-rail output architecture, it offers significant improvements across nearly all key parameters. It features extremely low input bias current (1pA) and input offset voltage (500µV), enabling higher DC accuracy and lower error. Its dynamic performance is enhanced with greater bandwidth and slew rate (7MHz, 8V/µs). The device also provides stronger output drive capability (96mA vs. 40mA) and a wider operating voltage range, notably extending down to 1.7V for greater compatibility. Critically, its total quiescent current (1.1mA) is in the same order of magnitude and slightly lower than the original part (1.64mA), preserving low-power design integrity. The package is fully compatible. This part can serve as a direct replacement while offering comprehensive enhancements in precision, speed, and drive strength.

Analysis ID: 9144-CCEB000

Based on part parameters and for reference only. Not to be used for procurement or production.