Ca3240

Updated October 6, 2026

Overview

Product sourcing insights & recommendations

26 来源

The CA3240 is a dual operational amplifier utilizing BiMOS technology, which combines the high input impedance of MOSFETs with the high output current of bipolar transistors Microcontrollerslab Renesas.

Market Trends & Availability

* Declining Supply: The CA3240 is increasingly scarce at major global distributors like Mouser and DigiKey, often leading to it being categorized as "obsolete" or "not for new designs" Edaboard Renesas.

* Secondary Market Resilience: Despite major distributor shortages, it remains available on B2B platforms such as Alibaba.com through specialized component suppliers in Shenzhen and Hong Kong. Prices typically range from $0.33 to $1.80 per piece, depending on volume and specific grade (CA3240E vs. CA3240AE) Alibaba Alibaba.

* Steady Demand for Repairs: Market demand is primarily driven by the maintenance of legacy industrial equipment, medical devices (e.g., ECG monitors), and specialized instrumentation where its unique 1.5 TΩ input impedance is critical Renesas.

Technical Highlights

* High Impedance: Offers a typical input impedance of 1.5 TΩ, making it ideal for high-sensitivity sensor applications Renesas.

* Wide Supply Range: Operates from 4V to 36V (single supply), with an input common-mode range that includes the negative rail (ground) Renesas.

* Performance: Features a 4.5 MHz gain bandwidth and a 9 V/μs slew rate Renesas.

Replacement Strategy

When the original IC is unavailable, engineers often turn to these alternatives:

* CA3140: The single-channel version; two can be used with a carrier board Eevblog Renesas.

* Modern Alternatives: The TLC272 (CMOS) is used for low-voltage applications, while OPA2991 or TLV9352 are recommended for modern designs requiring higher voltage and precision, though they often require SMD-to-DIP adapters Renesas.

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Sources & References

26 sources cited · Verified industry data & reports

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