Original Part
Alternative Part
1. LM2902KDG4 Substitution Conclusion
From the perspective of core electrical performance and package, the LM2902KDG4 can serve as a high-performance but higher-power-consumption substitution option. The key differences lie in its slew rate (0.5 V/µs vs. 0.05 V/µs) and gain-bandwidth product (1.2 MHz vs. 100 kHz), which are an order of magnitude higher. This enables it to handle higher-frequency and faster-changing signals. However, its quiescent current increases substantially from 85 µA (total for four channels) to approximately 5.6 mA (1.4 mA x 4), leading to a significant rise in system power consumption. Additionally, its input bias current and offset voltage are slightly higher, though the impact on general-purpose applications is limited. Given its full compatibility in supply voltage range (3-26V) and package (14-SOIC), substitution is not viable if the original design is extremely power-sensitive. If the original design requires higher signal response speed or is insensitive to increased power consumption, and the circuit design can tolerate slightly higher input errors, then substitution can be implemented.
2. LM2902KNSRG4 Substitution Conclusion
The feasibility conclusion for substituting the LM2902KNSRG4 is largely consistent with that of the LM2902KDG4, but there is one critical physical difference. It shares identical core electrical performance parameters with the KDG4 (i.e., the same significant increase in power consumption and substantial improvement in speed). However, its package width differs (5.30 mm vs. 3.90 mm). Although the pin count and sequence are compatible, the wider package body may prevent proper mounting or lead to poor soldering on PCB pads designed for the original 3.90 mm wide 14-SOIC package. The LM2902KNSRG4 can only be considered as a high-performance substitute if the board layout allows for the use of a wider package. Otherwise, the package mismatch alone precludes direct substitution.
Analysis ID: 90E9-5518000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com