MCP651ST-E/OT

Instrumentation, Op Amps, Buffer Amps Overview

The MCP651ST-E/OT is a single-channel operational amplifier from the MCP651 family, manufactured by Microchip Technology. It features a gain-bandwidth product of 50 MHz and a slew rate of 30 V/µs. The device operates on a supply voltage range of +2.5V to +5.5V with a typical quiescent current of 6.0 mA per channel. It includes internal mCal self-calibration at power-up to minimize input offset voltage to ±200 µV maximum. The amplifier offers rail-to-rail output swing, an input range including the negative rail, and high output current capability of ±100 mA. It is housed in a SOT-23-5 package and specified for operation over an extended temperature range of -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Internal mCal self-calibration mechanism minimizes input offset voltage upon power-up or calibration trigger.
• Rail-to-rail output swing combined with an input range that includes the negative rail simplifies circuit design.
• High-speed performance characterized by 50 MHz gain-bandwidth product and 30 V/µs slew rate.
• No phase reversal occurs even when inputs are overdriven beyond the common-mode range.

Instrumentation, Op Amps, Buffer Amps Applications

• Driving A/D Converters
• Fast Low-side Current Sensing
• Power Amplifier Control Loops
• Optical Detector Amplifier
• Multi-Pole Active Filter

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific ordering suffix 'E/OT' corresponds to the required temperature grade (-40°C to +125°C) and tape-and-reel packaging format. Confirm that the SOT-23-5 package dimensions match your PCB footprint requirements. Ensure the application does not require a CAL/CS pin, as this single-channel variant lacks that control interface found in other family members like the MCP653.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select the MCP651ST-E/OT when high bandwidth and low noise are critical alongside low offset voltage stability. It is suitable for applications requiring rail-to-rail output without phase reversal issues during overdrive conditions. Consider alternative family members if a dedicated Calibration/Chip Select pin is needed for low-power mode management or if dual/quad channel integration is preferred to save board space.

Instrumentation, Op Amps, Buffer Amps Part Context

This component belongs to the MCP651/1S/2/3/4/5/9 family of high bandwidth operational amplifiers. The family shares core specifications such as 50 MHz GBWP and low offset characteristics but varies in channel count and package options. Variants like MCP653 include a CAL/CS pin for external control, while others like MCP652 offer dual channels in SOIC packages. All devices utilize advanced CMOS technology for optimized speed and power efficiency.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct substitutes within the same family include MCP651S-E/OT (same function, different package). For multi-channel needs, consider MCP652 or MCP654. If external calibration control is required, the MCP653 serves as a functional equivalent with an added pin.

Instrumentation, Op Amps, Buffer Amps FAQ

Does the MCP651ST-E/OT have a Calibration/Chip Select pin?

No, the MCP651 single-channel variant does not include a CAL/CS pin. It relies on internal self-calibration at power-up. Devices like the MCP653 include this pin for manual calibration triggering and low-power mode control.

What is the input common-mode voltage range?

The input common-mode voltage range includes the negative rail (VSS). Specifically, it extends from VSS - 0.3V to VDD - 1.3V, allowing for full differential signal processing near ground potential.

How is the input offset voltage managed?

The device uses internal mCal technology to self-calibrate at power-up, reducing the maximum input offset voltage to ±200 µV. This calibration ensures high precision without requiring external trimming components.