Replacement Components to LMV324IDRG4: BU7487F-E2 and NCV20034DR2G

Original Part

LMV324IDRG4

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. BU7487F-E2 Substitution Conclusion The BU7487F-E2, when considered as a drop-in replacement, presents significant technical deviations that warrant careful evaluation. Fabricated using a CMOS process, it offers substantial advantages over the original part in several key areas: input bias current (1 pA vs. 15 nA), slew rate (10V/µs vs. 1V/µs), and bandwidth (10 MHz vs. 1 MHz). This makes it suitable for applications demanding high input impedance and high-speed signal processing. However, notable drawbacks include a significantly higher quiescent current (6mA vs. 1.64mA total current), increasing power dissipation by approximately 3.7x, lower output drive capability (12 mA vs. 40 mA), and a higher minimum operating voltage (3 V vs. 2.7 V). These factors may preclude its use in low-power, low-voltage, or high load-current applications. Furthermore, the wider package body width (4.40mm vs. 3.90mm) could introduce PCB layout compatibility issues. If the power supply and drive current requirements are met and the package can be accommodated, it can serve as a high-performance alternative.

2. NCV20034DR2G Substitution Conclusion The NCV20034DR2G represents a more direct and viable substitution, as its key parameters are either superior to or fully compatible with the original component. It maintains a lower total quiescent current (1.1mA vs. 1.64mA) while offering improved performance: higher slew rate (8V/µs), greater bandwidth (7 MHz), lower input offset voltage (500 µV vs. 1.7 mV), and an extremely low input bias current (1 pA). Additionally, it provides significantly stronger output drive capability (96 mA vs. 40 mA) and a wider supply voltage range (1.7-5.5 V vs. 2.7-5.5 V). The package is fully compatible (identical 14-SOIC dimensions). One minor consideration is that the reduced input bias current might influence noise design in certain high-impedance circuits. Overall, this part offers clear substitution advantages in performance, power consumption, and compatibility, making it particularly suitable for applications requiring high precision, high drive strength, or a wide operating voltage range.

Analysis ID: 9B7D-8F05000

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