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Texas Instruments MCP6291IDBVR
- Part No.:
- MCP6291IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MCP6291IDBVR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,595
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Product details
Overview
MCP6291IDBVR from Texas Instruments is a single-channel, rail-to-rail input/output operational amplifier optimized for low-power, precision signal conditioning in 2.4 V to 5.5 V systems. It delivers 10-MHz gain bandwidth, 8.7 nV/√Hz input voltage noise at 10 kHz, 1 pA input bias current, and 0.6 mA quiescent current - enabling high-fidelity amplification in battery-powered sensor interfaces and analog front-ends.
For engineers reviewing the MCP6291IDBVR datasheet, MCP6291IDBVR pinout, MCP6291IDBVR application, or MCP6291IDBVR equivalent, key selection criteria include its unity-gain stability, extended –40°C to 125°C operating range, resistive open-loop output impedance for capacitive-load robustness, and integrated RFI/EMI filtering - all critical for automotive infotainment, medical instrumentation, and HVAC control designs.
Technical Context
The MCP6291IDBVR employs a complementary differential input stage (N- and P-channel pairs) enabling true rail-to-rail common-mode input range - extending 100 mV beyond both supply rails across 2.4 V–5.5 V operation. Its class AB output stage achieves 15-mV rail-to-rail swing into 10-kΩ loads, with no phase reversal during overdrive.
Designed for stability with capacitive loads up to 300 pF, it features a resistive open-loop output impedance (~100 Ω at 10 MHz) and 55° phase margin at unity gain. Overload recovery time is 200 ns, and ESD protection meets ±4-kV HBM and ±1.5-kV CDM standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10 MHz typical - supports stable unity-gain and moderate-gain configurations up to ~100 kHz with full small-signal bandwidth. |
| Supply Voltage Range | 2.4 V to 5.5 V - compatible with single-cell Li-ion, 3.3-V logic, and 5-V legacy systems without level-shifting. |
| Input Bias Current | 1 pA typical - enables accurate amplification of high-impedance sources (e.g., photodiodes, pH electrodes) without significant offset error. |
| Input Voltage Noise | 8.7 nV/√Hz at 10 kHz - low enough for precision sensor signal chains where 1/f noise dominates below 1 kHz. |
| Quiescent Current | 0.6 mA per amplifier - balances speed and power for always-on battery applications like smoke detectors and portable medical devices. |
| Output Swing | Within 15 mV of rails into 10 kΩ - maximizes dynamic range for ADC driving in low-voltage, rail-to-rail data acquisition systems. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and HVAC environments. |
Pinout & Package
SOT-23-5 (DBV) package: 1.60 mm × 2.90 mm body, surface-mount, thermally enhanced for compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Class AB rail-to-rail driver capable of sourcing/sinking ±50 mA; connects directly to ADC inputs or filter stages. |
| 2 - V– | Negative supply / ground reference | Low-impedance return path; must be decoupled locally to minimize noise coupling in single-supply configurations. |
| 3 - +IN | Noninverting input | High-impedance node (1 pA bias); used for unity-gain buffers, reference followers, or high-Z sensor interfaces. |
| 4 - –IN | Inverting input | High-impedance node; accepts feedback networks for transimpedance, difference, or inverting gain configurations. |
| 5 - V+ | Positive supply | Primary power rail; requires 0.1-µF ceramic decoupling adjacent to pin to suppress high-frequency supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 2.4–5.5 V single-supply systems - critical for driving SAR ADCs without external level-shifting. |
| Resistive open-loop output impedance | ~100 Ω at 10 MHz - improves phase margin with capacitive loads up to 300 pF, reducing need for isolation resistors in sensor interface outputs. |
| Integrated RFI/EMI filter | Rejects high-frequency interference (e.g., GSM bursts, switching regulator noise) without external RC filters - simplifies layout in noisy automotive/industrial environments. |
| No phase reversal on overdrive | Prevents latch-up or uncontrolled output behavior when input exceeds common-mode range - enhances reliability in transient-prone systems like motor control feedback. |
| 4-kV HBM ESD protection | Meets IEC 61000-4-2 Level 2 requirements - reduces need for external TVS diodes in handheld and field-deployable equipment. |
Applications
| Photodiode Amplifier | Medical Instrumentation |
|---|---|
|
Use Scenario: Converting weak photocurrent from silicon photodiodes in pulse oximeters or blood analyzers. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current (1 pA) preserving signal integrity at sub-nA levels. Use Value: Enables detection of low-light physiological signals without DC offset drift or Johnson noise degradation - directly supporting FDA-cleared diagnostic accuracy. |
Use Scenario: Signal conditioning for ECG electrode inputs and temperature sensor bridges in portable patient monitors. IC Role / Device Role / Timing Role: Precision buffer and gain stage with rail-to-rail input (to handle ±mV-level bio-potentials) and low 10-kHz noise floor. Use Value: Maintains >80 dB CMRR across –40°C to 125°C while consuming <0.6 mA - extends battery life in Class II medical devices without compromising SNR. |
| HVAC Sensor Interface | Automotive Infotainment |
|
Use Scenario: Amplifying RTD and thermistor outputs in smart thermostats and air quality sensors. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier with 1.1 µV/°C offset drift and 8.7 nV/√Hz noise for high-resolution temperature digitization. Use Value: Delivers ±0.1°C measurement accuracy over full industrial temperature range - meeting ASHRAE 135 BACnet compliance for building automation. |
Use Scenario: Audio line-driver and microphone preamplifier in head units and digital cockpit displays. IC Role / Device Role / Timing Role: Low-THD+N (0.0008% at 1 kHz), rail-to-rail output stage driving 10-kΩ audio codecs and ADCs. Use Value: Supports AEC-Q200 Grade 2 qualification via –40°C to 105°C operation and integrated EMI filtering - eliminating external RF chokes in space-constrained infotainment modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-I/OT | Lower GBP (1 MHz), higher input bias current (10 pA), same SOT-23-5 package and rail-to-rail I/O. | Better suited for ultra-low-power (<100 µA) but lower-bandwidth applications like simple comparators or slow sensor buffers. | Select MCP6001T-I/OT only if bandwidth <1 MHz suffices and quiescent current reduction outweighs noise and speed trade-offs. |
| OPA316IDBVR | Higher GBP (10 MHz), lower noise (5.5 nV/√Hz), higher quiescent current (0.4 mA), same SOT-23-5 footprint. | Preferred for high-SNR audio or precision metrology where 3-dB noise advantage justifies 0.2 mA extra supply current. | Choose OPA316IDBVR when 5.5 nV/√Hz noise and 0.4 mA IQ are prioritized over EMI filtering and extended temperature range. |
Compared with MCP6291IDBVR, MCP6001T-I/OT trades bandwidth and precision for lower power, while OPA316IDBVR improves noise performance at the cost of EMI rejection and thermal ruggedness - making MCP6291IDBVR the optimal balance for automotive-grade, noise-immune, wide-temperature signal conditioning.
Availability
MCP6291IDBVR is available at Aetrix Electronics and suitable for photodiode amplifiers, medical instrumentation front-ends, and HVAC sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCP6291IDBVR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op amps and automotive-qualified components.
The MCP629x family was designed specifically for general-purpose, low-power, rail-to-rail signal conditioning in battery-operated and industrial systems - emphasizing EMI resilience, capacitive-load stability, and extended temperature operation.
FAQ
What is the maximum capacitive load the MCP6291IDBVR can drive without instability?
The MCP6291IDBVR maintains stable operation with capacitive loads up to 300 pF, thanks to its resistive open-loop output impedance (~100 Ω) and 55° phase margin at unity gain. This eliminates the need for series isolation resistors in many sensor-output and ADC-input configurations - verified by TI's Figure 20 and Figure 29 in SBOS879D.
Does the MCP6291IDBVR support true rail-to-rail input common-mode range?
Yes - the MCP6291IDBVR's complementary N/P-channel input stage allows common-mode voltage operation from (V–) – 0.1 V to (V+) + 0.1 V across its full 2.4 V–5.5 V supply range. This enables direct interfacing with grounded sensors and single-supply ADC references without external level-shifting circuitry.
What is the overload recovery time specification for the MCP6291IDBVR?
The MCP6291IDBVR recovers from output saturation in 200 ns (typical), as specified in Section 7.7 of the SBOS879D datasheet. This fast recovery minimizes propagation delay in overdriven conditions - critical for precision timing circuits and fast-settling data acquisition systems using the MCP6291IDBVR.
Is the MCP6291IDBVR qualified for automotive applications?
While not AEC-Q200 certified, the MCP6291IDBVR operates across –40°C to +125°C and includes ±4-kV HBM ESD protection - meeting key environmental and reliability requirements for non-safety-critical automotive infotainment and cabin control modules. System-level qualification remains the responsibility of the end designer.
How does the integrated RFI/EMI filter in the MCP6291IDBVR improve system-level immunity?
The MCP6291IDBVR's internal RFI/EMI filter attenuates high-frequency interference (e.g., 900-MHz GSM bursts or DC/DC switching noise) before it reaches the input stage - demonstrated by >60 dB EMIRR+ rejection above 100 MHz in Figure 27 of SBOS879D. This reduces or eliminates the need for external RC filters in noisy environments.
MCP6291IDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 6.5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 600µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MCP6291IDBVR FAQ
1.How can I place an order for MCP6291IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP6291IDBVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP6291IDBVR reliable?
The price and inventory of MCP6291IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP6291IDBVR is usually 5 days.
3.What payment methods are accepted for MCP6291IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP6291IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP6291IDBVR?
MCP6291IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP6291IDBVR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP6291IDBVR?
For technical support, including MCP6291IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP6291IDBVR requirements.
6.How does Aetrix verify that MCP6291IDBVR is sourced from the original manufacturer or authorized distributors?
All MCP6291IDBVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP6291IDBVR meets industry standards.
7.What is the process for return or replacement of MCP6291IDBVR?
All MCP6291IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with MCP6291IDBVR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP6291IDBVR part is unused and in its original packaging.
Return procedure for MCP6291IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP6291IDBVR Tags
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