CA3083

Overview

The CA3083 is a general-purpose high-current NPN transistor array featuring five independent transistors on a common monolithic substrate. It supports collector currents up to 100mA with a maximum collector-to-emitter breakdown voltage of 15V and a collector-to-base breakdown voltage of 20V. The device includes a dedicated substrate terminal for circuit isolation. Two internal transistors, Q1 and Q2, are factory-matched at 1mA bias current, offering a maximum input offset voltage of ±5mV and an input offset current of 2.5μA. Operating temperatures range from -55°C to 125°C.

Feature Summary

• Five independent high-current NPN transistors integrated on a single monolithic substrate
• Dedicated substrate terminal allowing flexible circuit design and isolation management
• Factory-matched differential pair (Q1 and Q2) optimized for low offset parameters
• RoHS compliant construction available in lead-free plus anneal configurations

Applications

• Signal processing and switching systems operating from DC to VHF
• Lamp and relay driver circuits
• Differential amplifier stages
• Temperature compensated amplifier designs
• Thyristor firing networks

Procurement Notes

Verify the specific package variant required, such as the standard 16-lead PDIP or the SOIC options. Confirm whether Pb-free plus anneal materials are necessary for assembly compatibility. Ensure the selected part number matches the intended soldering process, noting that certain Pb-free PDIPs are restricted to wave soldering only. Cross-reference manufacturer documentation for current revisions before finalizing orders.

Selection Notes

Select this component when multiple high-current NPN switches are needed within a compact footprint. The matched pair capability makes it suitable for precision differential applications requiring low offset voltages. Consider the separate substrate connection for managing parasitic coupling in high-frequency designs. Evaluate thermal dissipation requirements carefully, as power handling is limited per transistor.

Part Context

Manufactured by Renesas Electronics Corporation, the CA3083 belongs to a family of general-purpose transistor arrays. It serves as a versatile building block for analog and digital interface circuits. The device integrates multiple discrete functions into a single package, reducing board space while maintaining high current drive capabilities for various load types.

Replacement Considerations

Check datasheets for alternative NPN arrays with similar pinouts and current ratings. Verify that any substitute maintains the matched pair characteristics if differential performance is critical. Ensure the replacement supports the required operating temperature range and offers compatible packaging for existing PCB footprints.