Replacement Components to TSV622AIST: LMV358QPWR and AD8602DRMZ-REEL

Original Part

TSV622AIST

STMicroelectronics

CMOS Amplifier 2 Circuit Rail-to-Rail 8-MiniSO

Alternative Part

LMV358QPWR

Texas Instruments

Standard Amplifier 2 Circuit Rail-to-Rail 8-TSSOP

AD8602DRMZ-REEL

Analog Devices Inc.

CMOS Amplifier 2 Circuit Rail-to-Rail 8-MSOP

1. LMV358QPWR Substitution Conclusion Direct substitution is not viable. Although the LMV358QPWR is also a dual rail-to-rail output op amp, its key parameters differ significantly from the original part: its minimum supply voltage is 2.7V (versus 1.5V for the TSV622AIST), making it unsuitable for low-voltage systems operating between 1.5V and 2.7V; its quiescent current is as high as 210µA per channel (compared to 29µA total for the TSV622AIST), increasing power dissipation by approximately 14 times, which is highly undesirable for battery-powered or ultra-low-power applications; and its input bias current is 15nA (versus 1pA for the TSV622AIST), leading to greater error in high-impedance signal source applications. Although it offers higher bandwidth (1MHz) and slew rate (1V/µs), the fundamental differences in voltage and power requirements limit its use to general applications where power consumption is not critical and the supply voltage is ≥2.7V.

2. AD8602DRMZ-REEL Substitution Conclusion This device offers a performance upgrade but has a limited supply range; substitution feasibility must be evaluated based on system conditions. The AD8602DRMZ-REEL outperforms the original part in most key specifications: its gain bandwidth product (8.4MHz) and slew rate (6V/µs) far exceed those of the TSV622AIST, making it suitable for higher frequency or fast transient response applications; its input bias current (0.2pA) is lower, providing better precision. However, its minimum supply voltage is also 2.7V, which does not cover the 1.5V–2.7V range; its quiescent current reaches 750µA per channel, increasing power dissipation by about 50 times and severely restricting its use in low-power designs. If the system supply voltage is ≥2.7V and higher power consumption is acceptable, this part can serve as a high-performance alternative; otherwise, it is not recommended.

Analysis ID: 29F5-1168000

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