CA3140AM

Overview

The CA3140AM is a BiMOS operational amplifier featuring a PMOS input stage and bipolar output stage. It operates on supply voltages from 4V to 36V (±2V to ±18V). Key electrical parameters include a gain-bandwidth product of 4.5 MHz, a slew rate of 9 V/µs, and an input bias current of 10 pA at ±15V. The device provides a typical input resistance of 1.5 TΩ and supports short-circuit protection.

Feature Summary

• Integrates high-voltage PMOS transistors with high-voltage bipolar transistors on a single monolithic chip for high-speed performance.
• Features gate-protected MOSFET inputs providing very high input impedance and extremely low input current.
• Includes built-in output stage protection against damage from load terminal short circuits to either supply rail or ground.
• Internally phase compensated for stable unity gain follower operation with provision for external frequency compensation.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'AM' 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 operating temperature range of -55°C to 125°C for the intended application environment.

Selection Notes

Select this component when high input impedance and fast settling times are required. The PMOS input stage allows common mode voltage to swing below the negative supply rail, facilitating single-supply operation. Consider the internal phase compensation sufficient for most applications, though external capacitors can be added between terminals 1 and 8 for additional bandwidth reduction if necessary.

Part Context

The CA3140 series combines the advantages of high-voltage PMOS and bipolar technologies. It serves as a direct replacement for industry-standard 741 operational amplifiers in many applications while offering superior input characteristics. The device is manufactured by Renesas Electronics Corporation, formerly Intersil/Harris.

Replacement Considerations

CA3140AMZ is a confirmed Pb-free alternative within the same family.