CA3140M

Overview

The CA3140M is a BiMOS operational amplifier featuring a PMOS input stage and bipolar output stage. It operates on supply voltages from 4V to 36V (single or dual). Key electrical parameters include a gain-bandwidth product of 4.5 MHz, a slew rate of 9 V/µs, an input bias current of 10 pA, and an input resistance of 1.5 TΩ. The device provides short-circuit protection and includes offset nulling terminals.

Feature Summary

• Integrates high-voltage PMOS transistors with high-voltage bipolar transistors for high input impedance and low input current.
• Features internal phase compensation for stable unity-gain follower operation.
• Includes built-in protection against damage from load terminal short circuits to either supply rail or ground.

Applications

• Ground-referenced single supply amplifiers in automobile and portable instrumentation
• Sample and hold amplifiers
• Photocurrent instrumentation
• Active filters

Procurement Notes

Verify the specific ordering suffix 'M' corresponds to the 8-lead SOIC package configuration. Confirm RoHS compliance status as standard versions may differ from Pb-free variants. Ensure the component meets the required temperature range specifications for the intended application environment before finalizing procurement.

Selection Notes

Select this component when high input impedance and low input bias current are critical requirements. The wide common-mode input voltage range allows operation down to 0.5V below the negative supply rail, making it suitable for single-supply applications. Verify that the 4.5 MHz bandwidth and 9 V/µs slew rate meet the signal processing speed requirements.

Part Context

The CA3140M belongs to the CA3140 series of BiMOS operational amplifiers originally developed by Harris Corporation and later acquired by Intersil and Renesas Electronics. This series combines the advantages of MOSFET inputs with bipolar outputs to provide superior performance characteristics compared to traditional bipolar-only op-amps.

Replacement Considerations

CA3140MZ

FAQ

Can the CA3140M operate with a single power supply?

Yes, the CA3140M can operate with supply voltages ranging from 4V to 36V, supporting both single and dual supply configurations.

How is the input offset voltage adjusted?

Input offset voltage can be nulled using the dedicated offset null terminals (pins 1 and 5) connected to terminal 4 via a potentiometer.