Original Part
Alternative Part
Standard Amplifier 2 Circuit Rail-to-Rail 8-uMAX/uSOP
1. MAX4246AUA+ Substitution Conclusion
The substitution of MAX4246AUA+ for OPA2313IDGK requires careful consideration. Key differences include a minimum supply voltage of 2.5V (compared to 1.8V originally), an input bias current as high as 10nA (versus 0.2pA originally), and a supply current of 375µA per channel (versus 50µA originally). If the original design operates below 2.5V, substitution is not feasible. In high-impedance or precision measurement applications, the significant increase in input bias current may introduce noticeable errors and degrade signal integrity. Additionally, the higher supply current leads to increased power consumption, which can impact battery life in portable systems. Although other parameters such as gain bandwidth product (1MHz) and output current (30mA) are compatible or even superior, the critical limitations lie in the voltage range and input characteristics. Therefore, this substitution is only suitable for applications where the supply voltage is at least 2.5V and sensitivity to input bias current is low.
2. TS1872IYPT Substitution Conclusion
The TS1872IYPT offers certain advantages as a substitute but presents notable compatibility challenges. Differences include a higher gain bandwidth product (1.8MHz vs. 1MHz), lower input offset voltage (100µV vs. 500µV), larger input bias current (70nA vs. 0.2pA), higher supply current (500µA per channel vs. 50µA), stronger output drive capability (80mA vs. 15mA), wider supply range (1.8V–6V vs. 1.8V–5.5V), and a different package width (4.40mm vs. 3.00mm). While it provides improved dynamic response and accuracy, the drastic increase in input bias current can severely limit precision in high-impedance circuits, leading to elevated noise and error. Moreover, the significantly higher power consumption may not be suitable for low-power designs, and the package size difference necessitates PCB re-layout. Its automotive-grade qualification (AEC-Q100) makes it appropriate for harsh environment applications. Overall, substitution viability depends on whether the compromises in input bias current, power consumption, and physical dimensions are acceptable. In non-automotive or non-high-drive applications, a thorough evaluation is recommended.
Analysis ID: 6002-646F000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com