MCP621-E/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP621-E/SN is a single-channel, low-power operational amplifier with 200 µV maximum input offset voltage, 84 dB typical CMRR, and a voltage-feedback architecture in an SOIC-8 package. It delivers precision signal amplification with rail-to-rail output for sensor interface and instrumentation applications. From $0.85 in stock worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP621-E/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3800(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP621-E/SN?
- Single op-amp with 200 µV maximum input offset voltage
- 84 dB typical common-mode rejection ratio (CMRR)
- Ultra-low bias current of 0.005 µA for high-impedance sensor inputs
- Voltage-feedback architecture with internal frequency compensation
- RoHS-compliant lead-free SOIC-8 package
- Wide supply voltage range suitable for 3.3V and 5V systems
What is MCP621-E/SN used for?
The MCP621-E/SN is ideal for precision analog front-ends in sensor signal conditioning circuits such as bridge amplifiers, thermocouple interfaces, and low-level transducer amplification. Its extremely low 0.005 µA bias current and 84 dB CMRR make it particularly effective for high-impedance pH sensors, photodiode amplifiers, and medical instrumentation designs. The device also serves portable and battery-powered measurement equipment where low quiescent current and precise offset performance are critical.
What are the specifications of MCP621-E/SN?
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| YTEOL | 8 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.005 µA |
| Common-mode Reject Ratio-Min | 68dB |
| Common-mode Reject Ratio-Nom | 84dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 200 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Low-Bias | YES |
| Low-Offset | YES |
| Micropower | NO |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Slew Rate-Nom | 10V/us |
| Supply Current-Max | 3.6mA |
| Supply Voltage Limit-Max | 6.5V |
| Supply Voltage-Nom (Vsup) | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Unity Gain BW-Nom | 20000 |
| Voltage Gain-Min | 25100 |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Mainland China, Thailand |
Where can I find the MCP621-E/SN datasheet?
MCP621-E/SN Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP621-E/SN?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the MCP621-E/SN's 0.005 µA bias current benefit high-impedance sensor interface circuits?
With a maximum input bias current of only 0.005 µA, the MCP621-E/SN introduces negligible current-induced offset error even when connected to megaohm-range source impedances such as pH electrodes or photodiodes. This means the voltage error from bias current across a 10 MΩ source is just 50 mV theoretical maximum, enabling accurate signal amplification without external bias current compensation networks.
What CMRR performance does the MCP621-E/SN provide, and in which measurement scenarios does it matter most?
The MCP621-E/SN achieves a typical common-mode rejection ratio of 84 dB, suppressing common-mode noise by a factor of over 15,000. This level of rejection is essential in bridge sensor amplifiers, industrial 4-20 mA transmitters, and ECG front-ends where power-line interference at 50 Hz or 60 Hz must be rejected by at least 60 dB to maintain signal integrity within a 200 µV accuracy budget.
When should a designer select the MCP621-E/SN over a rail-to-rail input/output op-amp for a 3.3V powered sensor board?
The MCP621-E/SN is the better choice when the priority is minimum input offset voltage (200 µV max) and ultra-low bias current (0.005 µA) rather than full input common-mode range to the supply rails. In resistive bridge sensor applications powered at 3.3V where the differential input stays well within the supply range, the MCP621's precision specifications reduce zero-point calibration requirements and extend battery life due to its low quiescent current.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.3800 | $0.38 |
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