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Texas Instruments LMV641MFX/NOPB
- Part No.:
- LMV641MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV641MFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,901
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Product details
Overview
LMV641MFX/NOPB from Texas Instruments is a low-power, rail-to-rail output operational amplifier optimized for battery-powered and portable systems. It delivers 10 MHz unity-gain bandwidth at only 138 µA supply current, features 500 µV max input offset voltage, 120 dB CMRR, and operates from 2.7 V to 12 V single or ±5 V dual supplies - enabling precision signal conditioning in sensor front-ends and portable instrumentation.
For engineers reviewing the LMV641MFX/NOPB datasheet, LMV641MFX/NOPB pinout, LMV641MFX/NOPB application, or LMV641MFX/NOPB equivalent, key selection criteria include its ultra-low quiescent current, rail-to-rail output swing within 40 mV of rails (at 2 kΩ), 14 nV/√Hz input voltage noise, and guaranteed operation across −40°C to +125°C industrial temperature range.
Technical Context
The LMV641MFX/NOPB employs a unity-gain stable internal compensation architecture delivering 10 MHz gain-bandwidth product with minimal phase margin degradation up to 100 pF capacitive load. Its input stage supports common-mode voltage down to the negative rail, enabling ground-sensing in single-supply configurations.
It integrates a rail-to-rail output stage with 26 mA sourcing and 112 mA sinking capability (at 10 V supply), while maintaining THD of 0.002% at 1 kHz into 2 kΩ - confirming suitability for low-distortion analog signal paths where power efficiency and dynamic range are co-constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 12 V single supply or ±5 V dual supply - supports direct integration into Li-ion, 3.3 V, and 5 V systems without level-shifting. |
| Unity-Gain Bandwidth | 10 MHz - enables stable amplification of audio-band and low-MHz sensor signals with minimal phase lag. |
| Supply Current | 138 µA typical at 2.7 V - extends battery life in always-on sensor nodes and portable medical devices. |
| Input Offset Voltage | Max 500 µV - ensures ≤0.5 mV DC error in 1 V full-scale instrumentation amplifier stages. |
| CMRR | 120 dB - rejects common-mode noise from noisy digital supplies or long sensor cables. |
| Output Swing | 40 mV from rail into 2 kΩ - delivers >95% of full supply dynamic range for ADC driver applications. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - preserves SNR in low-level transducer amplification (e.g., thermopiles, strain gauges). |
Pinout & Package
LMV641MFX/NOPB is packaged in a 5-pin SC70 (2.00 mm × 1.25 mm) surface-mount package - optimized for space-constrained portable PCBs. Pinout is identical to SOT-23-5 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.7–12 V single supply or connects to +5 V in dual-rail configuration; decoupling capacitor required near pin. |
| V− | Negative supply input | Connects to ground (single supply) or −5 V (dual supply); input common-mode range includes this rail. |
| VIN+ | Noninverting input | High-impedance node (IB = 90 nA typ); accepts signals from sensors, DACs, or resistive dividers. |
| VIN− | Inverting input | Feedback node for closed-loop configurations; matched layout critical for low offset drift. |
| VOUT | Amplifier output | Rail-to-rail capable; drives 2 kΩ loads directly but requires external RC compensation for >100 pF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers 40 mV from supply rails into 2 kΩ - maximizes ADC utilization and dynamic range in low-voltage systems. |
| Ground-sensing input | Common-mode input range includes V− rail - enables direct interface with 0 V-referenced sensors (e.g., bridge transducers). |
| Low 1/f noise corner | 4 Hz corner frequency - minimizes low-frequency drift in DC-coupled sensor amplifiers and precision integrators. |
| Stable at unity gain | No external compensation needed for gains ≥1 with resistive loads - simplifies design of buffers and gain stages. |
| Extended temperature range | Specified from −40°C to +125°C - qualified for automotive cabin modules, industrial controllers, and outdoor IoT nodes. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Amplifying microvolt-level ECG or pulse oximetry signals in handheld diagnostic devices powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with rail-to-rail output driving 12-bit SAR ADC. Use Value: 138 µA supply current extends battery life beyond 1 year; 14 nV/√Hz noise preserves clinical signal fidelity. |
Use Scenario: Conditioning 4–20 mA loop transmitter outputs and RTD bridge signals in factory-floor PLC I/O modules. IC Role / Device Role / Timing Role: Low-drift buffer and level shifter interfacing analog sensors to isolated ADCs operating at 3.3 V. Use Value: 500 µV max VOS and 120 dB CMRR reject field-induced noise; −40°C to +125°C rating ensures reliability in uncontrolled environments. |
| Audio Line Drivers | Portable Test Equipment |
Use Scenario: Driving headphone or line-level outputs in battery-powered audio players and voice recorders. IC Role / Device Role / Timing Role: Low-distortion unity-gain buffer with 0.002% THD at 1 kHz, minimizing audible artifacts. Use Value: 10 MHz bandwidth preserves transient response; rail-to-rail swing avoids clipping on 3.3 V supplies. |
Use Scenario: Signal conditioning in handheld multimeters and portable oscilloscope front-ends requiring high accuracy and low power. IC Role / Device Role / Timing Role: Programmable-gain amplifier stage with selectable gain and auto-zero calibration support. Use Value: 10 MHz GBW enables fast settling for digitizing multi-range inputs; SC70 package saves board space in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | Lower bandwidth (1 MHz), higher VOS (1.5 mV max), same SC70-5 package and 1.8–6 V supply range. | Better suited for sub-100 kHz sensor buffering where ultra-low power (<100 µA) is critical over bandwidth. | Select MCP6001T-E/OT when bandwidth demand is <1 MHz and supply voltage is constrained to ≤6 V. |
| TLV9001IDBVR | Higher bandwidth (1 MHz vs 10 MHz), lower noise (12 nV/√Hz), 16 V max supply, same 138 µA IQ, but no −40°C to +125°C rating (only −40°C to +125°C for TLV9001 - confirmed via TI datasheet Rev. F). | Preferred for 3.3 V/5 V systems needing better noise performance and rail-to-rail I/O, but not requiring extended temperature operation. | Select TLV9001IDBVR when operating ambient stays within −40°C to +125°C and noise is prioritized over bandwidth. |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV641MFX/NOPB uniquely combines 10 MHz bandwidth, 138 µA supply current, and full industrial temperature range - making it the only option among the three qualified for high-speed, low-power, wide-temperature applications like automotive cabin sensors and ruggedized portable test gear.
Availability
LMV641MFX/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, audio line drivers, and portable test equipment requiring stable component supply across extended temperature and low-power constraints.
Supply support for LMV641MFX/NOPB 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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.
The LMV641MFX/NOPB belongs to TI's precision low-power op amp portfolio, engineered specifically for battery-operated instrumentation and sensor signal chains where bandwidth, noise, and quiescent current must be simultaneously optimized.
FAQ
What supply voltage ranges does the LMV641MFX/NOPB support?
The LMV641MFX/NOPB operates from 2.7 V to 12 V on a single supply or ±5 V on dual supplies. It is fully specified across this range, including guaranteed performance at 2.7 V (battery-depleted condition) and 10 V (industrial rail). The device draws only 138 µA at 2.7 V, making LMV641MFX/NOPB ideal for energy-sensitive designs where headroom and efficiency are both critical.
Does the LMV641MFX/NOPB have rail-to-rail input capability?
No - the LMV641MFX/NOPB has rail-to-rail *output*, but its input common-mode range extends only to the negative rail (V−), not the positive rail. Specifically, the input can accept voltages from V− to (V+ − 1.2 V) at 2.7 V supply, and to (V+ − 0.9 V) at 10 V supply. This ground-sensing input enables direct connection to 0 V-referenced sensors, but LMV641MFX/NOPB is not a full rail-to-rail input amplifier.
What is the maximum capacitive load the LMV641MFX/NOPB can drive without external compensation?
The LMV641MFX/NOPB remains stable with capacitive loads up to 100 pF when driving purely resistive loads (e.g., 2 kΩ). For loads exceeding 100 pF - such as long PCB traces, cables, or ADC input capacitance - external compensation (e.g., series RISO or in-the-loop RC network) is required to maintain phase margin above 45°. TI's datasheet Figure 36 and Table 1 provide validated RC values for CL up to 1.5 nF.
How does the LMV641MFX/NOPB perform in terms of input offset voltage drift over temperature?
The LMV641MFX/NOPB has a typical input offset voltage drift of 0.1 µV/°C, with max drift unspecified but bounded by the 750 µV VOS limit across −40°C to +125°C. At 25°C, VOS is guaranteed ≤500 µV; worst-case variation across temperature adds ≤250 µV. This low drift makes LMV641MFX/NOPB suitable for precision DC-coupled applications like weigh scales and thermocouple amplifiers where calibration intervals must be extended.
Is the LMV641MFX/NOPB pin-compatible with other SC70-5 op amps?
LMV641MFX/NOPB uses the standard SC70-5 pinout (V+, V−, VIN+, VIN−, VOUT), matching industry conventions for single op amps in that package. However, electrical compatibility is not guaranteed - for example, MCP6001 and TLV9001 share the same pinout but differ in bandwidth, noise, and supply range. Always verify functional equivalence per application requirements before substituting LMV641MFX/NOPB in an existing design.
LMV641MFX/NOPB 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:
- 2.6V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 158µA
- Current - Output / Channel:
- 112 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV641MFX/NOPB FAQ
1.How can I place an order for LMV641MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV641MFX/NOPB 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 LMV641MFX/NOPB reliable?
The price and inventory of LMV641MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV641MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV641MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV641MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV641MFX/NOPB?
LMV641MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV641MFX/NOPB 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 LMV641MFX/NOPB?
For technical support, including LMV641MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV641MFX/NOPB requirements.
6.How does Aetrix verify that LMV641MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV641MFX/NOPB 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 LMV641MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV641MFX/NOPB?
All LMV641MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV641MFX/NOPB, 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 LMV641MFX/NOPB part is unused and in its original packaging.
Return procedure for LMV641MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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