MCP6291RT-E/OT Microchip Integrated Circuit (SOT23 (5-Pin)) In Stock
Microchip MCP6291 is a single general-purpose rail-to-rail input/output operational amplifier with 10 MHz bandwidth, 80 dB CMRR, 5 pA input bias current, and 1.8 V to 5.5 V single-supply operation. Available in SOT-23-5 package, RoHS compliant, in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- MCP6291RT-E/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4469(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 on a 1.8 V to 5.5 V single supply for maximum dynamic range in low-voltage mixed-signal designs
- 10 MHz gain-bandwidth product enabling active filter implementation and wideband sensor amplification up to 100 kHz with gains of 10 V/V
- Ultra-low 5 pA maximum input bias current allowing high-impedance source connection without measurable offset in photodiode and pH electrode amplifier circuits
Applications
The MCP6291 serves single-supply sensor conditioning in portable instruments, wearable devices, and IoT sensor nodes where the 1.8 V minimum supply covers LDO outputs from coin-cell or Li-ion regulated rails. Its rail-to-rail output swing maximizes ADC input range in 3.3 V and 5 V data acquisition systems without additional level-shifting circuitry. The SOT-23-5 package suits high-density PCB layouts in compact medical monitors and industrial transmitters with constrained board space.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOT-23-5 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| 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 | 80dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 5000 µV |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Low-Bias | YES |
| Low-Offset | NO |
| Micropower | NO |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE |
| Packing Method | TAPE AND REEL |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 7V/us |
| Supply Current-Max | 1.3mA |
| 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 | 0.95mm |
| Terminal Position | DUAL |
| Unity Gain BW-Nom | 10000 |
| Voltage Gain-Min | 31620 |
| Wideband | NO |
| Package | SOT23 (5-Pin) |
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 is the minimum supply voltage of the MCP6291, and which battery chemistries does it support directly?
The MCP6291 operates from a single supply as low as 1.8 V, which is compatible with two NiMH cells in series at end of life, regulated CR2032 coin-cell outputs, and LDO regulators in LiPo-powered IoT devices, enabling direct use without boost conversion in ultra-low-power wearable sensor nodes.
How does the MCP6291RT-E/OT CMRR of 80 dB affect signal accuracy in noisy industrial environments?
With an 80 dB CMRR, the MCP6291 rejects common-mode noise by a factor of 10000:1. A 10 mV ground noise spike on a 5 V industrial supply rail creates less than 1 µV of differential error referred to the input, preserving 12-bit measurement accuracy in factory automation sensor conditioning circuits exposed to switching converter interference.
What gain-bandwidth product does the MCP6291 offer, and how does it compare to a standard 1 MHz op-amp for filter design?
The MCP6291 provides a 10 MHz gain-bandwidth product versus a typical 1 MHz unity-gain bandwidth amplifier, allowing stable closed-loop gains of 100 V/V at 100 kHz without bandwidth limiting. This 10x advantage enables anti-aliasing filters and sensor preamplifiers at audio and ultrasonic frequencies in medical imaging and non-destructive testing equipment.
For a portable pH electrode measurement circuit, how does the MCP6291's input bias current specification matter?
pH glass electrodes present source impedances of 100 MΩ to 1 GΩ. The MCP6291's 5 pA maximum input bias current creates only 0.5 mV to 5 mV of voltage error across those impedances, which is within acceptable limits for 0.01 pH unit resolution measurements, avoiding the need for guarded traces or specialized electrometer-grade amplifiers in handheld pH meters.
When would an engineer select MCP6291RT-E/OT over MCP6021T-E/OT for a new design on a 3.3 V supply?
MCP6291RT-E/OT is the MCP6291 in tape-and-reel SOT-23-5 format while MCP6021T-E/OT is the same package variant of MCP6021. Both share 10 MHz bandwidth and 5 pA bias current on 2.5 V to 5.5 V supplies. The MCP6291 extends the lower supply limit to 1.8 V, making it preferable when the design must also operate from a 2 V battery-depleted rail or when the 1.8 V supply voltage headroom from a 3.3 V LDO output at minimum dropout matters.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.6700 | $0.67 |
| 10+ | $0.5900 | $5.90 |
| 25+ | $0.5600 | $14.00 |
| 100+ | $0.5000 | $50.00 |
| 2250+ | $0.4560 | $1026.00 |
| 3000+ | $0.4469 | $1340.70 |
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