CA3078AT

Overview

The CA3078AT is a micropower operational amplifier manufactured by Rochester Electronics. It delivers milliamperes of output current while consuming microwatts of standby power, with quiescent current as low as 700nW. The device supports a wide supply voltage range from ±0.75V to ±15V and features adjustable operating points. It includes output short circuit protection and allows frequency compensation via a single external capacitor. Designed for single 1.5V battery operation, it offers high peak output current of at least 6.5mA.

Feature Summary

• Micropower operation with extremely low standby power consumption
• Wide supply voltage range supporting single or dual supplies
• Adjustable quiescent current for tailored performance
• Integrated output short circuit protection

Applications

• Portable electronics requiring extended battery life
• Telemetry systems with strict power constraints
• Medical electronics devices
• Intrusion alarm systems
• Precision instrumentation

Procurement Notes

Verify the specific suffix 'AT' against the official manufacturer datasheet to confirm temperature grade and packaging details. Ensure the component source is an authorized distributor to guarantee authenticity. Check for RoHS compliance status if required for your assembly process. Confirm pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this component when low standby power is critical alongside moderate output current capabilities. It is suitable for designs requiring adjustable biasing and single-supply operation from 1.5V. Consider the need for external frequency compensation capacitors during the design phase. Evaluate thermal dissipation requirements based on the expected load conditions.

Part Context

Rochester Electronics specializes in sourcing and distributing obsolete and hard-to-find semiconductors. The CA3078 series originates from earlier industry standards for micropower amplifiers. This part represents a continuation of legacy operational amplifier technology adapted for modern low-power applications. It serves as a bridge for maintaining older designs that rely on these specific electrical characteristics.

Replacement Considerations

Consult the official Rochester Electronics documentation for direct cross-references. Verify pin compatibility and electrical specifications against potential substitutes. Ensure replacement parts meet the same micropower and voltage range requirements.

FAQ

How is frequency compensation achieved for the CA3078AT?

Frequency compensation can be accomplished using a single external capacitor connected to the appropriate compensation pins as defined in the datasheet.

What is the minimum standby power consumption?

The standby power consumption is as low as 700nW, making it suitable for ultra-low power applications.

Can the CA3078AT operate from a single 1.5V battery?

Yes, the device is designed to operate practically with a single 1.5V battery due to its low voltage range starting at ±0.75V.