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Texas Instruments LMV651MFX/NOPB
- Part No.:
- LMV651MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV651MFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,848
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Product details
Overview
LMV651MFX/NOPB from Texas Instruments is a single-channel, rail-to-rail output, low-voltage operational amplifier optimized for battery-powered and space-constrained systems. It delivers 12 MHz unity-gain bandwidth at only 116 μA supply current, features 1.5 mV max input offset voltage, 100 dB CMRR, and operates from 2.7 V to 5.5 V - enabling precision signal conditioning in portable medical sensors and automotive body electronics.
For engineers reviewing the LMV651MFX/NOPB datasheet, LMV651MFX/NOPB pinout, LMV651MFX/NOPB application, or LMV651MFX/NOPB equivalent, key selection criteria include its ultra-low quiescent current, ground-sensing input range (includes V−), 120 mV rail-to-rail output swing into 2 kΩ at 5 V, and stability with capacitive loads ≤100 pF without external compensation.
Technical Context
The LMV651MFX/NOPB uses TI's VIP50 process to achieve high bandwidth–power efficiency: 12 MHz gain-bandwidth product with just 116 μA supply current. Its input stage supports common-mode voltage down to the negative rail (0 V in single-supply operation), and its rail-to-rail output delivers >95% of full-scale swing under 2-kΩ load.
Stability is unity-gain configured but degrades above 100 pF capacitive load due to phase margin reduction; external compensation (e.g., series RISO or in-the-loop RC) is required for heavier capacitive drives. Input-referred voltage noise is flat at 17 nV/√Hz (1 kHz–100 kHz), with a low 1/f corner at 4 Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct connection to Li-ion (3.0–4.2 V) and 3.3 V/5 V logic rails without regulation. |
| Unity-Gain Bandwidth | 12 MHz - enables stable amplification of audio-band and low-speed sensor signals (e.g., EEG, thermopile outputs) up to ~1 MHz closed-loop. |
| Supply Current | 116 μA typical - allows continuous operation for >1 year on a 200 mAh coin cell in always-on sensor front-ends. |
| Input Offset Voltage | ±1.5 mV max - ensures <0.3% gain error in 100× instrumentation amplifier configurations with 3.3 V reference. |
| CMRR / PSRR | 100 dB / 95 dB - rejects power supply ripple and common-mode interference in noisy automotive or industrial environments. |
| Output Swing | 120 mV from rail (high/low) into 2 kΩ at 5 V - delivers 4.88 Vpp dynamic range, sufficient for driving SAR ADC inputs directly. |
| THD+N | 0.003% at 1 kHz, 2 kΩ - preserves signal fidelity in audio preamplifier and active filter stages. |
Pinout & Package
LMV651MFX/NOPB is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size - optimized for high-density PCB layouts in wearables and compact modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +IN | Noninverting input | Accepts DC-coupled signals down to V− (0 V); enables ground-referenced sensor interfaces in single-supply systems. |
| 2: V− | Negative supply | Typically connected to GND in single-supply operation; must be decoupled with 0.1 μF ceramic capacitor near pin. |
| 3: −IN | Inverting input | Used for feedback network attachment; high impedance (>1012 Ω) minimizes loading on precision resistor dividers. |
| 4: OUT | Amplifier output | Rail-to-rail capable; limited sourcing/sinking to 18.5 mA/25 mA - requires external buffer for >2 kΩ capacitive loads. |
| 5: V+ | Positive supply | Accepts 2.7–5.5 V; internal ESD protection rated to ±2 kV HBM - no external TVS needed for board-level ESD immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers >95% supply rail utilization into 2-kΩ load - eliminates need for level-shifting circuitry when interfacing with 3.3 V ADCs. |
| Ground-sensing input | Input common-mode range includes V− (0 V) - enables direct connection of resistive sensors (e.g., RTDs, strain gauges) referenced to system ground. |
| 12 MHz bandwidth at 116 μA | Best-in-class 103 kHz/μA bandwidth-to-power ratio - achieves 10× higher speed than comparable micropower op-amps (e.g., TLV2461). |
| 17 nV/√Hz input voltage noise | Low-noise performance at micropower consumption - suitable for amplifying µV-level signals from piezoelectric or thermocouple sensors. |
| −40°C to +125°C operation | Qualified for automotive under-hood and industrial control applications - specified performance maintained across full temperature range. |
Applications
| Portable Medical Sensors | Automotive Body Electronics |
|---|---|
Use Scenario: Amplifying low-amplitude bio-potential signals (e.g., ECG, EMG) from dry electrodes in wearable patches. IC Role / Device Role / Timing Role: Single-supply transducer interface amplifier with DC-coupled input and rail-to-rail output driving 12-bit SAR ADC. Use Value: 116 μA quiescent current extends battery life to >7 days on a 120 mAh LiPo; 1.5 mV VOS avoids baseline drift in analog front-end. |
Use Scenario: Signal conditioning for door lock actuators, seat position sensors, and ambient light detection in cabin modules. IC Role / Device Role / Timing Role: Low-voltage buffer and comparator hysteresis generator in 3.3 V microcontroller subsystems. Use Value: 2.7–5.5 V operation tolerates battery voltage sag during cranking; 125°C rating ensures reliability in dashboard-mounted ECUs. |
| Battery-Powered IoT Nodes | Industrial Temperature Monitoring |
Use Scenario: Amplifying thermistor or RTD bridge outputs in wireless sensor nodes powered by primary lithium cells. IC Role / Device Role / Timing Role: Precision gain stage preceding ultra-low-power ADC and BLE SoC (e.g., CC2652R). Use Value: 17 nV/√Hz noise floor preserves resolution in 16-bit measurements; 100 dB CMRR rejects switching regulator noise from shared PCB plane. |
Use Scenario: Cold-junction compensation and linearization of K-type thermocouples in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: High-accuracy instrumentation amplifier front-end with programmable gain and offset trimming. Use Value: 6.6 μV/°C input offset drift minimizes calibration frequency; −40°C to +125°C spec matches industrial ambient requirements. |
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 supply current (100 μA), 2.7 V min supply - lacks rail-to-rail output swing at light loads. | Suitable for sub-100 kHz sensor buffering where bandwidth is not critical; not recommended for audio or fast-settling ADC drivers. | Select when cost is prioritized over speed and output swing; verify VOUT headroom meets system dynamic range needs. |
| TLV9001IDBVR | Higher bandwidth (1 MHz), lower noise (18 nV/√Hz), same 116 μA IQ, but 1.8–5.5 V supply - improved ESD rating (4 kV HBM). | Better suited for 1.8 V MCU interfaces and mixed-voltage systems; wider supply range eases design reuse across platforms. | Prefer for new designs targeting 1.8 V compatibility or enhanced robustness; note different pinout (V+ and OUT swapped vs LMV651). |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV651MFX/NOPB offers superior bandwidth (12 MHz vs ≤1 MHz) and proven rail-to-rail output drive into 2 kΩ - making it the optimal choice for time-critical, high-fidelity analog signal chains in space- and power-constrained applications.
Availability
LMV651MFX/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, automotive body electronics, and battery-powered IoT nodes requiring stable component supply across extended production lifecycles.
Supply support for LMV651MFX/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 specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and low-power signal chain solutions.
The LMV651MFX/NOPB belongs to TI's LMV65x family - engineered specifically for ultra-low-power, wide-bandwidth amplification in single-supply, ground-referenced sensor interfaces and portable equipment.
FAQ
What is the maximum capacitive load the LMV651MFX/NOPB can drive without external compensation?
The LMV651MFX/NOPB remains stable with capacitive loads up to 100 pF when configured in unity-gain or inverting mode. Beyond 100 pF, phase margin drops significantly - requiring external compensation such as series RISO (5–50 Ω) or in-the-loop RC networks. This limit is confirmed in Figure 20 (Phase Margin vs Capacitive Load) of the SNOSAI7K datasheet.
Does the LMV651MFX/NOPB support true single-supply operation with input signals at ground potential?
Yes. The LMV651MFX/NOPB features an input common-mode voltage range that includes the negative supply rail (V−), allowing it to accurately amplify signals referenced to ground in single-supply configurations (e.g., V− = 0 V, V+ = 3.3 V). This is explicitly specified in Section 6.5 (CMVR = 0 V to 2.1 V at 3 V supply) and Section 7.3.4 of the datasheet.
What is the typical output voltage swing of the LMV651MFX/NOPB into a 2-kΩ load at 5 V supply?
At V+ = 5 V and V− = 0 V, the LMV651MFX/NOPB delivers a typical output swing of 120 mV from each rail - meaning VOUT(HIGH) ≈ 4.88 V and VOUT(LOW) ≈ 0.12 V into a 2-kΩ load. This rail-to-rail capability is validated in Figure 10 and Table 6.6 (VO parameter) of the SNOSAI7K datasheet.
Is the LMV651MFX/NOPB qualified for automotive applications?
Yes. The LMV651MFX/NOPB is specified for operation from −40°C to +125°C and is widely used in automotive body electronics. While not AEC-Q200 certified as a standalone component, its temperature rating, 2.7–5.5 V supply range, and robust PSRR/CMRR meet functional requirements for non-safety-critical cabin and chassis modules per TI's automotive qualification guidelines.
How does the input voltage noise of the LMV651MFX/NOPB compare to other micropower op-amps?
The LMV651MFX/NOPB delivers 17 nV/√Hz input-referred voltage noise (flatband, 1 kHz–100 kHz) - significantly lower than typical micropower op-amps like the MCP6001 (29 nV/√Hz) or LPV821 (22 nV/√Hz). Its 4 Hz 1/f noise corner further enhances low-frequency precision, making it suitable for DC-coupled sensor amplification where noise integration below 10 Hz matters.
LMV651MFX/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:
- 3V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 116µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2.7 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
LMV651MFX/NOPB FAQ
1.How can I place an order for LMV651MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV651MFX/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 LMV651MFX/NOPB reliable?
The price and inventory of LMV651MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV651MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV651MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV651MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV651MFX/NOPB?
LMV651MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV651MFX/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 LMV651MFX/NOPB?
For technical support, including LMV651MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV651MFX/NOPB requirements.
6.How does Aetrix verify that LMV651MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV651MFX/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 LMV651MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV651MFX/NOPB?
All LMV651MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV651MFX/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 LMV651MFX/NOPB part is unused and in its original packaging.
Return procedure for LMV651MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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