MCP6491T-E/OT

Instrumentation, Op Amps, Buffer Amps Overview

The MCP6491T-E/OT is a single-channel operational amplifier from the MCP6491/2/4 family, manufactured by Microchip Technology. It features a typical gain bandwidth product of 7.5 MHz and a slew rate of 6 V/µs. The device operates on a supply voltage range of 2.4V to 5.5V with a typical quiescent current of 530 µA per amplifier. Key electrical characteristics include a maximum input offset voltage of ±1.5 mV and an input bias current as low as 1 pA at +25°C, rising to 150 pA at +125°C. It offers rail-to-rail input and output capabilities, unity gain stability, and no phase reversal. The component is housed in a SC70-5 or SOT-23-5 package and supports an extended operating temperature range from -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Low-input bias current ensures minimal signal loss in high-impedance circuits
• Rail-to-rail input and output operation maximizes dynamic range
• Unity gain stable design prevents oscillation in buffer configurations
• No phase reversal maintains correct output polarity during overdrive

Instrumentation, Op Amps, Buffer Amps Applications

• Photodiode Amplifier
• pH Electrode Amplifier
• Low Leakage Amplifier
• Piezoelectric Transducer Amplifier
• Battery-Powered Signal Conditioning

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify that the ordering suffix matches the required package type (SC70-5 or SOT-23-5) and temperature grade (E for Extended). Confirm the 'T' suffix indicates tape-and-reel packaging if reel delivery is specified. Ensure the part number corresponds to the single-channel variant (MCP6491) rather than dual or quad versions. Cross-reference the manufacturer date code and lot traceability against project requirements.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when low power consumption and high precision are required simultaneously. The 530 µA quiescent current makes it suitable for battery-operated devices. Choose this op amp for applications requiring rail-to-rail swing without sacrificing bandwidth, specifically where input bias currents must remain below 150 pA at elevated temperatures. It is ideal for transimpedance amplifiers driving photodiodes or interfacing with high-impedance sensors like pH electrodes.

Instrumentation, Op Amps, Buffer Amps Part Context

The MCP6491T-E/OT belongs to the MCP6491/2/4 family of CMOS operational amplifiers designed for low-power, high-precision applications. This family includes single (MCP6491), dual (MCP6492), and quad (MCP6494) variants. All members share similar electrical characteristics, including low input bias current and rail-to-rail I/O, but differ in channel count and package options such as SOIC, MSOP, TSSOP, and TDFN.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Microchip MCP6481: Lower bandwidth (4 MHz) but similar low-bias characteristics. Microchip MCP6471: Further reduced bandwidth (2 MHz) for lower power applications. Verify pin compatibility and thermal resistance differences when substituting packages.