MCP6271-E/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
The MCP6271-E/SN is a dual rail-to-rail operational amplifier from Microchip Technology with 85 dB CMRR, 5 nA input bias current, and internal frequency compensation. It operates from a single 1.8 V to 6 V supply and comes in an 8-pin SOIC package. Lead-free and widely stocked for portable, battery-powered sensor and signal-conditioning designs.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP6271-E/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4310(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Rail-to-rail input and output with 85 dB typical CMRR allows accurate signal amplification right up to the supply rails, maximizing dynamic range in single-supply systems
- Ultra-low 5 nA input bias current minimizes error when interfacing high-impedance sensors such as pH electrodes or piezoelectric transducers without external buffering
- Wide single-supply range from 1.8 V to 6 V and internal compensation simplify design in both 3.3 V IoT nodes and traditional 5 V instrumentation without additional components
Applications
The MCP6271-E/SN excels in portable measurement equipment and battery-powered sensor nodes that require low input bias current and wide supply tolerance from a single 3.3 V or 5 V rail. Its 85 dB CMRR and rail-to-rail output swing make it well suited for Wheatstone bridge amplifiers, transimpedance stages for photodiodes, and precision voltage followers in wearable health monitors. Industrial sensor interfaces and active filter stages that must maintain accuracy across the full supply range also benefit from its low quiescent current and internal frequency compensation.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.005 µA |
| Common-mode Reject Ratio-Min | 65dB |
| Common-mode Reject Ratio-Nom | 85dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 5000 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Low-Bias | YES |
| Low-Offset | NO |
| Micropower | YES |
| 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 |
| Slew Rate-Nom | 0.9V/us |
| Supply Current-Max | 0.24mA |
| Supply Voltage Limit-Max | 7V |
| Supply Voltage-Nom (Vsup) | 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 | 2000 |
| Voltage Gain-Min | 31620 |
| 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 | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input bias current does MCP6271-E/SN specify, and how does that benefit high-impedance sensor interfaces?
The MCP6271-E/SN specifies a maximum input bias current of 5 nA. When driving a 1 MΩ source impedance, this 5 nA bias produces only a 5 mV offset error at the amplifier input, compared to approximately 500 mV for a standard BJT op-amp with 500 nA bias current. This 100x improvement makes the MCP6271-E/SN ideal for pH electrodes, piezoelectric sensors, and photodiode transimpedance stages that present source impedances in the megaohm range.
Across what supply voltage range does MCP6271-E/SN operate, and how does it perform in a 3.3 V IoT node?
The MCP6271-E/SN operates from a single supply of 1.8 V to 6 V, covering the 3.3 V rail common in IoT microcontrollers without any bias voltage generation. Its rail-to-rail output swing reaches within a few millivolts of both the positive and negative rails, preserving roughly 99 % of the 3.3 V headroom for ADC-ready signal conditioning. The internal frequency compensation eliminates the need for an external stabilization capacitor, saving one passive component per amplifier stage.
How does the MCP6271-E/SN CMRR of 85 dB compare to general-purpose op-amps in a Wheatstone bridge signal chain?
With 85 dB typical CMRR, the MCP6271-E/SN rejects common-mode noise by a factor of approximately 178,000:1, meaning a 1 V common-mode interference on a Wheatstone bridge output appears as only about 5.6 µV of differential error. Standard general-purpose op-amps often specify 65 dB to 70 dB CMRR (a factor of 1,800 to 3,200:1), which would produce 315 µV to 556 µV of error for the same 1 V interference — a 56x to 100x degradation in noise rejection.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6600 | $0.66 |
| 25+ | $0.5400 | $13.50 |
| 100+ | $0.4900 | $49.00 |
| 800+ | $0.4600 | $368.00 |
| 7500+ | $0.4321 | $3240.75 |
| 10000+ | $0.4310 | $4310.00 |
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