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Texas Instruments LMV641MFE/NOPB
- Part No.:
- LMV641MFE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV641MFE/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:560
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Product details
Overview
LMV641MFE/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, 138 µA supply current, and 500 µV max input offset voltage across a 2.7 V to 12 V supply range. Its −40°C to +125°C operation and ground-sensing input make it suitable for precision sensor front-ends in compact industrial and medical instrumentation.
For engineers reviewing the LMV641MFE/NOPB datasheet, LMV641MFE/NOPB pinout, LMV641MFE/NOPB application, or LMV641MFE/NOPB equivalent, key selection criteria include its 14 nV/√Hz input voltage noise, 120 dB CMRR, 105 dB PSRR, rail-to-rail output swing within 40 mV of rails (at 2 kΩ), and guaranteed performance at 2.7 V single-supply operation.
Technical Context
The LMV641MFE/NOPB employs a unity-gain stable architecture with dominant-pole compensation, enabling wideband operation without external stability components under typical loads. Its input stage includes a ground-sensing topology that accepts common-mode voltages down to the negative rail, supporting true single-supply signal acquisition.
It features a low-noise bipolar input stage with 4 Hz 1/f corner frequency and 14 nV/√Hz flatband voltage noise-unusual for sub-200 µA op amps. Output drive capability is rated up to 26 mA sourcing and 112 mA sinking at 10 V supply, with THD+N of 0.002% at 1 kHz into 2 kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 10 MHz - enables stable amplification of signals up to ~1 MHz in closed-loop configurations with gain ≥1. |
| Supply Current | 138 µA typical at 2.7 V - supports multi-year battery life in always-on sensor nodes and wearable devices. |
| Input Offset Voltage | Max 500 µV - ensures ≤0.5 mV error in 1 V full-scale measurement circuits without trimming. |
| CMRR / PSRR | 120 dB / 105 dB - rejects >1 million-fold common-mode or supply ripple, critical for high-side current sensing. |
| Output Swing | 40 mV from rail (2 kΩ load) - delivers >95% of full supply dynamic range for ADC interfacing with minimal headroom loss. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - preserves SNR in low-level transducer amplification (e.g., thermopiles, strain gauges). |
| Operating Temp Range | −40°C to +125°C - qualified for under-hood automotive, industrial control, and outdoor IoT edge nodes. |
Pinout & Package
LMV641MFE/NOPB is packaged in a 5-pin SC70 (2.00 mm × 1.25 mm) surface-mount package, optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; requires layout isolation from noisy digital traces to preserve 14 nV/√Hz noise performance. |
| 2 (V−) | Negative supply rail | Reference for ground-sensing input stage; must be low-impedance to maintain CMRR >114 dB over temperature. |
| 3 (VIN+) | Noninverting input | Accepts common-mode voltages from V− to (V+ − 1.2 V); enables direct connection to 0 V-referenced sensors. |
| 4 (VIN−) | Inverting input | Differential pair input node; matched trace routing required when used in precision I/V conversion to minimize offset drift. |
| 5 (V+) | Positive supply rail | Supports 2.7–12 V operation; decoupling capacitor (≥100 nF) mandatory within 2 mm to sustain PSRR >105 dB at 100 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 40 mV of either supply rail at 2 kΩ load - maximizes dynamic range for 12-bit+ SAR ADCs powered from same supply. |
| Ground-sensing input | Common-mode range extends to V− - eliminates level-shifting circuitry for 0–VREF sensor outputs in single-supply systems. |
| Low 1/f noise corner | 4 Hz - ensures stable DC-coupled gain in precision weigh scales and medical ECG front-ends without baseline wander. |
| Capacitive load drive | Stable up to 1 nF without compensation - simplifies filtering on ADC inputs or LCD bias lines without added RC networks. |
| Ultra-low power bandwidth ratio | 10 MHz per 138 µA - achieves 72.5 kHz/µA efficiency, outperforming most competing rail-to-rail op amps by >2× in portable audio codecs. |
Applications
| Portable Medical Sensors | Industrial Current Monitoring |
|---|---|
Use Scenario: Amplifying microvolt-level bio-signals (e.g., ECG, EMG) from dry electrodes in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, DC-coupled preamplifier with gain ≥100 and bandwidth ≥150 Hz. Use Value: 14 nV/√Hz noise and 4 Hz 1/f corner enable clean acquisition without AC coupling or high-pass filtering, preserving ST-segment morphology. | Use Scenario: High-side current sensing in 24 V PLC I/O modules with ±0.5% accuracy requirement. IC Role / Device Role / Timing Role: Difference amplifier with 500 µV max VOS referenced to 24 V rail. Use Value: 120 dB CMRR rejects common-mode transients during relay switching; rail-to-rail output interfaces directly to 3.3 V ADC reference. |
| Smart Home Environmental Sensing | Battery-Powered Data Loggers |
Use Scenario: Signal conditioning for NTC thermistors and MEMS humidity sensors in wireless thermostats. IC Role / Device Role / Timing Role: Precision voltage follower and buffer driving 10 kΩ ADC input impedance. Use Value: 138 µA quiescent current extends CR2032 battery life beyond 5 years in sleep-mode operation (1 µA system wake-up rate). | Use Scenario: Analog front-end for multi-channel temperature/pressure logging in remote field deployments. IC Role / Device Role / Timing Role: Low-drift, low-power signal conditioner multiplexed across 8 sensor inputs. Use Value: 0.1 µV/°C offset drift and 500 µV max VOS ensure <0.1°C error over −25°C to +75°C ambient without calibration. |
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 bandwidth (1 MHz), higher VOS (1.5 mV max), 100% tested at 1.8–6 V but no 12 V rating | Targeted at ultra-low-voltage (1.8 V) logic-compatible systems; lacks 12 V headroom for industrial 24 V rail monitoring | Select only for cost-sensitive, sub-1 MHz, 1.8–5.5 V designs where 120 dB CMRR is not required |
| TLV9001IDBVR | Higher supply current (60 µA vs 138 µA), lower noise (11 nV/√Hz), 1 MHz GBW, specified down to 1.2 V | Optimized for lowest possible voltage operation (1.2 V) and noise; trades bandwidth and supply range for ultra-low-VDD compatibility | Prefer for 1.2–5.5 V battery systems needing <12 nV/√Hz noise but not requiring 10 MHz bandwidth or 12 V tolerance |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV641MFE/NOPB uniquely balances 10 MHz bandwidth, 12 V operation, and sub-150 µA supply current-making it the only choice for high-fidelity, wide-dynamic-range amplification in 2.7–12 V portable instrumentation where both speed and efficiency are non-negotiable.
Availability
LMV641MFE/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial current monitoring, smart home environmental sensing, and battery-powered data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV641MFE/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 delivering analog and embedded processing solutions, with deep expertise in precision amplifiers and low-power signal chain design.
The LMV641MFE/NOPB belongs to TI's LMV low-voltage op amp family, engineered specifically for high-accuracy, energy-efficient signal conditioning in space- and power-constrained portable and industrial systems.
FAQ
What is the maximum capacitive load the LMV641MFE/NOPB can drive without external compensation?
The LMV641MFE/NOPB remains stable with capacitive loads up to 1 nF when configured in unity-gain or inverting mode with proper PCB layout. Beyond 1 nF, external compensation (e.g., series output resistor + feedback capacitor) is required to maintain phase margin above 45°, as documented in Figure 37 and Table 1 of the LMV641MFE/NOPB datasheet.
Does the LMV641MFE/NOPB support true single-supply operation with input signals at ground potential?
Yes. The LMV641MFE/NOPB features a ground-sensing input stage with common-mode voltage range extending to V−, allowing VIN− and VIN+ to operate at 0 V when V− = 0 V. This enables direct interface with grounded sensors (e.g., thermocouples, bridge transducers) without level-shifting circuitry in single-supply systems.
What is the typical supply current of the LMV641MFE/NOPB at 5 V supply, and how does it vary with temperature?
At TA = 25°C and V+ = 5 V, the LMV641MFE/NOPB draws 158 µA typical supply current. Over the full −40°C to +125°C range, supply current remains bounded between 138 µA (min at 25°C, 2.7 V) and 240 µA (max at 125°C, 10 V), ensuring predictable battery drain in wide-temperature deployments.
How does the 1/f noise corner frequency of 4 Hz benefit DC-coupled sensor applications using the LMV641MFE/NOPB?
A 4 Hz 1/f noise corner means flicker noise contributes negligibly above 4 Hz, preserving low-frequency signal integrity in DC-coupled configurations. For example, in ECG amplification, this allows accurate capture of the 0.05–100 Hz clinical band without baseline wander or drift-induced T-wave distortion-critical for FDA-cleared portable diagnostics.
Is the LMV641MFE/NOPB pin-compatible with other SC70-5 op amps such as the TLV2461 or MCP6001?
No. While all three use SC70-5 packaging, the LMV641MFE/NOPB pinout (OUT–V−–VIN+–VIN−–V+) differs from TLV2461 (V+–VIN−–VIN+–V−–OUT) and MCP6001 (V+–VIN−–VIN+–V−–OUT). Direct replacement requires PCB redesign. Always verify pin mapping against the LMV641MFE/NOPB datasheet before substitution.
LMV641MFE/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
LMV641MFE/NOPB FAQ
1.How can I place an order for LMV641MFE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV641MFE/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 LMV641MFE/NOPB reliable?
The price and inventory of LMV641MFE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV641MFE/NOPB is usually 5 days.
3.What payment methods are accepted for LMV641MFE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV641MFE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV641MFE/NOPB?
LMV641MFE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV641MFE/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 LMV641MFE/NOPB?
For technical support, including LMV641MFE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV641MFE/NOPB requirements.
6.How does Aetrix verify that LMV641MFE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV641MFE/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 LMV641MFE/NOPB meets industry standards.
7.What is the process for return or replacement of LMV641MFE/NOPB?
All LMV641MFE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV641MFE/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 LMV641MFE/NOPB part is unused and in its original packaging.
Return procedure for LMV641MFE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV641MFE/NOPB Tags
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