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Texas Instruments MCP6291IDCKR
- Part No.:
- MCP6291IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MCP6291IDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,854
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Product details
Overview
MCP6291IDCKR 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 operates across –40°C to 125°C - enabling use in battery-powered sensor front-ends and automotive HVAC control loops.
For engineers reviewing the MCP6291IDCKR datasheet, MCP6291IDCKR pinout, MCP6291IDCKR application, or MCP6291IDCKR equivalent, key selection criteria include capacitive-load stability (tested up to 300 pF), resistive open-loop output impedance (100 Ω at 10 MHz), EMI rejection performance, and rail-to-rail swing capability with ≤15 mV headroom into 10 kΩ loads.
Technical Context
The MCP6291IDCKR employs a complementary differential input stage (N- and P-channel pairs) to achieve rail-to-rail common-mode input range extending 100 mV beyond both supply rails - critical for single-supply operation near ground or VCC. Its class AB output stage enables full rail-to-rail swing with low quiescent current (600 µA typical).
It features an integrated RFI/EMI filter, no phase reversal under overdrive, and 4-kV HBM ESD protection. The device is unity-gain stable and exhibits improved capacitive-load tolerance due to its resistive open-loop output impedance - reducing overshoot and easing compensation in high-CL applications like ADC driver stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain bandwidth product | 10 MHz typical - supports stable unity-gain buffer or G = +10 amplification up to ~1 MHz without peaking. |
| Supply voltage range | 2.4 V to 5.5 V - compatible with Li-ion, 3.3 V, and 5 V logic domains without level-shifting. |
| Input bias current | 1 pA typical - enables high-impedance sensor interfacing (e.g., photodiodes, pH electrodes) without significant offset error. |
| Input voltage noise | 8.7 nV/√Hz at 10 kHz - suitable for medium-bandwidth analog filters and medical instrumentation signal chains. |
| Quiescent current | 600 µA per amplifier - balances speed and power for always-on battery monitoring and smoke detector analog front-ends. |
| Output swing | Within 15 mV of rails into 10 kΩ - maximizes dynamic range for 12-bit+ ADCs powered from same supply. |
| Open-loop output impedance | 100 Ω at 10 MHz - simplifies stability with capacitive loads and reduces sensitivity to PCB trace inductance. |
Pinout & Package
Package: SC70-5 (DCK), body size 1.25 mm × 2.00 mm - ultra-compact footprint for space-constrained portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplifier output | Class AB rail-to-rail driver capable of sourcing/sinking ±50 mA short-circuit current; low-Z output aids driving ADC sample-and-hold capacitors. |
| 2: V– | Negative supply / ground reference | Common return path for dual-supply operation or ground node in single-supply configurations; tied directly to PCB ground plane for noise immunity. |
| 3: +IN | Noninverting input | High-impedance node (1 pA bias) accepting signals from sensors or DACs; benefits from guard ring layout to minimize leakage in high-Z applications. |
| 4: –IN | Inverting input | Differential input node used in transimpedance or difference-amplifier configurations; matched to +IN for CMRR >80 dB over temperature. |
| 5: V+ | Positive supply | Primary power input (2.4–5.5 V); decoupling capacitor (0.1 µF ceramic) required within 2 mm for EMI suppression and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends (V–) – 0.1 V to (V+) + 0.1 V - enables direct interface to 0–VCC sensors without level-shifting circuitry. |
| Rail-to-rail output | Swings to within 15 mV of either rail into 10 kΩ - preserves >99% of available voltage range for 12-bit ADCs operating on 3.3 V supplies. |
| Resistive open-loop output impedance | 100 Ω at 10 MHz - eliminates need for isolation resistors when driving >100 pF loads, reducing component count in compact designs. |
| Integrated RFI/EMI filter | Rejects >60 dB of RF interference up to 1 GHz - critical for automotive infotainment and industrial motor-control environments with switching noise. |
| No phase reversal | Remains stable during input overdrive - prevents latch-up or erroneous output states in fault conditions (e.g., sensor disconnect, ESD event). |
Applications
| Photodiode Amplifier | Battery Voltage Monitor |
|---|---|
|
Use Scenario: Converting weak photocurrent (nA–µA) from ambient light or pulse oximetry sensors into precise voltage output. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 pA input bias current minimizing dark-current error and 8.7 nV/√Hz noise preserving SNR. Use Value: Enables detection of sub-100 nA photocurrents in handheld medical devices without external biasing or cooling. |
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable electronics with 1% accuracy over temperature. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between battery sense point and low-voltage ADC input. Use Value: Rail-to-rail I/O and 600 µA quiescent current extend runtime while maintaining 12-bit measurement fidelity across –40°C to 125°C. |
| Smoke Detector Signal Chain | HVAC Temperature Sensor Interface |
|
Use Scenario: Amplifying microamp-level ionization chamber current in residential/commercial smoke alarms. IC Role / Device Role / Timing Role: Low-drift, low-noise front-end amplifier with EMI filtering to reject false triggers from AC line noise or RF sources. Use Value: 4-kV HBM ESD rating and robust overload recovery (<200 ns) ensure reliability in uncontrolled installation environments. |
Use Scenario: Conditioning output from NTC thermistors or RTDs in heating/ventilation control units exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Precision gain stage with 10-MHz bandwidth supporting fast thermal response measurements and digital compensation algorithms. Use Value: Extended –40°C to 125°C operation and <±5 mV offset drift over temperature enable calibration-free field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | Lower GBW (1 MHz), higher input bias current (15 pA), no integrated EMI filter. | Cost-optimized for non-critical, low-frequency sensing where RF immunity is not required. | Select when supply current <150 µA is mandatory and bandwidth ≤100 kHz suffices. |
| OPA333AIDBVR | Zero-drift architecture, lower offset (±2 µV), higher quiescent current (17 µA), no EMI filter. | Used where DC precision dominates over RF rejection - e.g., strain gauge bridges or precision references. | Choose for µV-level offset stability over time/temperature, accepting higher power and reduced EMI resilience. |
Compared with MCP6291IDCKR, MCP6001T-E/OT trades bandwidth and EMI immunity for ultra-low power, while OPA333AIDBVR prioritizes long-term DC accuracy over RF robustness and speed - making MCP6291IDCKR optimal for mixed-signal systems requiring balanced AC performance, noise, and environmental resilience.
Availability
MCP6291IDCKR is available at Aetrix Electronics and suitable for battery-powered applications, automotive HVAC control modules, and medical sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MCP6291IDCKR 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 high-reliability op amp design for industrial, automotive, and medical markets.
The MCP629x family was engineered for general-purpose, low-power precision amplification - targeting cost-sensitive yet performance-demanding applications including portable instrumentation, safety-critical sensors, and energy-efficient control systems.
FAQ
What is the maximum capacitive load the MCP6291IDCKR can drive without instability?
The MCP6291IDCKR maintains stability with capacitive loads up to 300 pF, as verified by overshoot testing in the official datasheet (Figure C025). Its resistive open-loop output impedance (100 Ω at 10 MHz) enables this behavior without requiring external series resistance - unlike many general-purpose op amps that oscillate above 50–100 pF.
Does the MCP6291IDCKR support true rail-to-rail input when powered from a 2.4 V supply?
Yes. The MCP6291IDCKR guarantees rail-to-rail input operation from (V–) – 0.1 V to (V+) + 0.1 V across its full 2.4 V to 5.5 V supply range. At 2.4 V, this means the input accepts signals from –0.1 V to +2.5 V - essential for interfacing with sensors referenced to system ground or VCC.
How does the MCP6291IDCKR's EMI rejection compare to standard op amps?
The MCP6291IDCKR integrates an on-chip RFI/EMI filter that provides >60 dB rejection of RF interference up to 1 GHz (per Figure C041). This is significantly better than unfiltered op amps like the LM358, which typically exhibit <20 dB rejection above 100 MHz - making MCP6291IDCKR suitable for automotive and industrial environments with strong switching noise.
Can the MCP6291IDCKR be used in single-supply photodiode amplifier circuits?
Yes. With 1 pA input bias current, rail-to-rail input (including ground), and low 8.7 nV/√Hz noise, the MCP6291IDCKR is well-suited for single-supply transimpedance amplifiers. Its ability to operate down to 2.4 V allows direct integration with low-voltage microcontrollers and ADCs without additional power rails.
What is the overload recovery time specification for the MCP6291IDCKR?
The MCP6291IDCKR recovers from output saturation in 200 ns (0.2 µs), as specified in Section 7.7 of the datasheet. This fast recovery minimizes distortion in pulsed or transient-heavy signals - such as those found in smoke detector ion chambers or motor current sensing - ensuring accurate waveform reconstruction.
MCP6291IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
MCP6291IDCKR FAQ
1.How can I place an order for MCP6291IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP6291IDCKR 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 MCP6291IDCKR reliable?
The price and inventory of MCP6291IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP6291IDCKR is usually 5 days.
3.What payment methods are accepted for MCP6291IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP6291IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP6291IDCKR?
MCP6291IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP6291IDCKR 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 MCP6291IDCKR?
For technical support, including MCP6291IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP6291IDCKR requirements.
6.How does Aetrix verify that MCP6291IDCKR is sourced from the original manufacturer or authorized distributors?
All MCP6291IDCKR 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 MCP6291IDCKR meets industry standards.
7.What is the process for return or replacement of MCP6291IDCKR?
All MCP6291IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with MCP6291IDCKR, 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 MCP6291IDCKR part is unused and in its original packaging.
Return procedure for MCP6291IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP6291IDCKR Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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