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Texas Instruments LMV651MGX
- Part No.:
- LMV651MGX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV651MGX.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,935
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Product details
Overview
LMV651MGX 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 with only 116 μA supply current, 1.5 mV max input offset voltage, and 17 nV/√Hz input-referred voltage noise - enabling precision signal conditioning in portable instrumentation and automotive sensor interfaces.
For engineers reviewing the LMV651MGX datasheet, LMV651MGX pinout, LMV651MGX application, or LMV651MGX equivalent, key selection criteria include its 2.7–5.5 V supply range, −40°C to 125°C operating temperature, 100 dB CMRR, 95 dB PSRR, and SC70-5 package compatibility with high-density PCB layouts.
Technical Context
The LMV651MGX employs TI's VIP50 process to achieve exceptional bandwidth-to-power efficiency. Its fully differential input stage supports ground-sensing operation (input common-mode range includes V−), while the rail-to-rail output stage enables >95% of full-scale swing into 2 kΩ loads - critical for low-voltage ADC driver and sensor front-end applications.
It is unity-gain stable but requires external compensation when driving capacitive loads >100 pF. Phase margin degrades beyond that threshold due to output impedance–load capacitance interaction, necessitating in-the-loop RC feedback or series isolation resistor techniques per Figure 35 and 36 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct connection to Li-ion battery (3.0–4.2 V) or regulated 3.3 V/5 V rails without level-shifting. |
| Unity-Gain Bandwidth | 12 MHz - enables stable amplification of audio-band and low-MHz sensor signals (e.g., piezoelectric transducers, ECG front-ends). |
| Input Offset Voltage | Max ±1.5 mV - ensures ≤0.3% gain error in 100× gain stages at room temperature, reducing calibration burden in precision measurement. |
| Input-Referred Voltage Noise | 17 nV/√Hz at 1 kHz - maintains SNR >85 dB for 1 Vpp signals in 20 kHz bandwidth, suitable for low-level sensor amplification. |
| Output Swing (2 kΩ) | 120 mV from rail (5 V supply) - delivers 4.88 Vpp output swing, maximizing dynamic range into ADCs with 5 V reference. |
| CMRR / PSRR | 100 dB / 95 dB - rejects power supply ripple and common-mode interference in noisy automotive or industrial environments. |
| Quiescent Current | 116 μA - allows continuous operation for >1 year on a 200 mAh coin cell in always-on sensor nodes. |
Pinout & Package
LMV651MGX is packaged in a 5-pin SC70 (DCK) footprint measuring 2.00 mm × 1.25 mm, optimized for ultra-compact PCB layouts and high-volume automated assembly.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+IN) | Noninverting Input | Accepts DC-coupled signals down to V− (ground in single-supply); enables high-impedance sensor buffering with minimal bias current error. |
| 2 (V−) | Negative Supply Input | Connects to ground or negative rail; defines lower bound of input common-mode and output swing range. |
| 3 (−IN) | Inverting Input | Used in inverting amplifier, transimpedance, or active filter configurations; matched to +IN for optimal CMRR. |
| 4 (OUT) | Amplifier Output | Rail-to-rail capable; drives 2 kΩ loads within 120 mV of supply rails at 5 V - avoids clipping in low-voltage data acquisition. |
| 5 (V+) | Positive Supply Input | Accepts 2.7–5.5 V; internal regulation ensures stable biasing across supply variation - critical for battery discharge tracking. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers >95% supply rail utilization into 2 kΩ, preserving full-scale resolution when driving SAR or delta-sigma ADCs. |
| Ground-sensing input | Input common-mode range extends to V−, enabling direct interface with 0 V-referenced sensors (e.g., thermistors, bridge outputs) without level shifters. |
| 12 MHz bandwidth @ 116 μA | Best-in-class 103 kHz/μA bandwidth-per-power ratio - outperforms legacy low-power op-amps by 3× in signal chain speed per μA. |
| 17 nV/√Hz voltage noise | Enables sub-10 μV RMS noise in 10 kHz bandwidth - sufficient for 16-bit+ resolution in medical and test equipment front-ends. |
| −40°C to 125°C operation | Qualified for under-hood automotive and industrial control applications where ambient temperature exceeds 85°C. |
Applications
| Portable ECG Monitor Front-End | Automotive Cabin Temperature Sensor Interface |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in a wearable cardiac monitor. IC Role / Device Role / Timing Role: Primary gain stage with DC-coupled input and low-noise, rail-to-rail output driving 16-bit ADC. Use Value: 17 nV/√Hz noise and 1.5 mV offset ensure ≥100 dB SNR and <0.5% baseline drift over battery life - meeting AHA clinical accuracy requirements. |
Use Scenario: Conditioning resistance changes from NTC thermistors mounted near HVAC ducts in passenger compartments. IC Role / Device Role / Timing Role: Precision noninverting amplifier with 2.7–5.5 V supply tolerance, operating across vehicle battery voltage swings. Use Value: 100 dB CMRR rejects ignition noise; 125°C rating ensures reliability during summer cabin heat soak (>80°C ambient). |
| Industrial Battery Management Cell Voltage Sensing | Smart Home CO Detector Signal Chain |
Use Scenario: Measuring individual Li-ion cell voltages (0–4.2 V) in multi-cell packs using resistive dividers and precision buffers. IC Role / Device Role / Timing Role: High-input-impedance buffer isolating divider network from ADC input loading and leakage. Use Value: 80 nA max input bias current prevents >0.1% divider ratio error; 116 μA quiescent current minimizes self-heating in sealed BMS enclosures. |
Use Scenario: Amplifying low-amplitude current signals from electrochemical CO sensors (nA-level output) in battery-operated detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input capacitance and stable phase margin up to 100 pF load. Use Value: Unity-gain stability and 12 MHz bandwidth support fast response to CO spikes; 120 mV rail headroom ensures linear output at alarm thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001UT-E/OT | Lower bandwidth (1 MHz), higher input offset (2.5 mV), 100% tested VOS spec, same SC70-5 package. | Better for cost-sensitive, low-speed sensor buffering; insufficient for audio or fast transient detection. | Choose MCP6001UT-E/OT when bandwidth <2 MHz suffices and production VOS screening is mandatory. |
| TLV9001IDBVR | Higher bandwidth (1 MHz vs 12 MHz), lower supply current (50 μA), 100% tested VOS (0.75 mV), same SC70-5 footprint. | Optimized for ultra-low-power IoT endpoints; lacks bandwidth for medium-speed signal chains. | Choose TLV9001IDBVR when sub-50 μA operation is critical and 12 MHz bandwidth is unnecessary. |
Compared with MCP6001UT-E/OT and TLV9001IDBVR, LMV651MGX uniquely balances 12 MHz bandwidth, 116 μA supply current, and 1.5 mV VOS in SC70 - making it the only option among the three qualified for precision, medium-speed analog front-ends in automotive and portable medical devices.
Availability
LMV651MGX is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensing, and industrial battery monitoring requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMV651MGX 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 design.
The LMV65x family was engineered for ultra-low-power, high-bandwidth signal conditioning in space- and energy-constrained applications - targeting portable medical devices, automotive subsystems, and intelligent sensors.
FAQ
What is the maximum capacitive load the LMV651MGX can drive without external compensation?
The LMV651MGX remains stable with capacitive loads up to 100 pF. Beyond this, phase margin degrades significantly - verified in Figure 20 of the datasheet. For loads >100 pF (e.g., long traces or ADC input capacitance), external compensation via in-the-loop RC feedback (RS + CF) or series isolation resistor (RISO) is required to maintain stability. LMV651MGX must not be used unbuffered into >100 pF without verifying loop response.
Does the LMV651MGX support true single-supply operation with input signals at ground?
Yes. The LMV651MGX features an input common-mode voltage range that includes V−, allowing direct DC coupling of 0 V-referenced signals (e.g., thermistor bridges, current-sense shunts) in single-supply configurations. This eliminates level-shifting circuitry and preserves signal integrity - a confirmed specification in Section 6.5 CMVR (0 V minimum) and Section 7.3.4 of the LMV651MGX datasheet.
What is the typical output voltage swing of the LMV651MGX at 3.3 V supply?
At 3.3 V supply and 2 kΩ load, the LMV651MGX delivers a typical output swing of 120 mV from each rail - meaning it can reach ~0.12 V above V− and ~3.18 V below V+, yielding ~3.06 Vpp usable range. This is confirmed in Figure 10 and Table 6.5 VO specifications. At 10 kΩ load, swing improves to 45–50 mV from rail.
Is the LMV651MGX pin-compatible with other SC70-5 op-amps like the TLV2461 or MCP6001?
No. While LMV651MGX, TLV2461, and MCP6001 all use SC70-5 packages, their pinouts differ: LMV651MGX assigns Pin 1 to +IN, Pin 2 to V−, Pin 3 to −IN, Pin 4 to OUT, Pin 5 to V+. TLV2461 uses Pin 1=OUT, Pin 2=−IN, Pin 3=+IN, Pin 4=V−, Pin 5=V+. MCP6001 uses Pin 1=OUT, Pin 2=−IN, Pin 3=+IN, Pin 4=V+, Pin 5=V−. Direct replacement requires PCB redesign.
How does the LMV651MGX perform in terms of THD+N at 1 kHz and 2 kΩ load?
The LMV651MGX achieves 0.003% total harmonic distortion plus noise (THD+N) at 1 kHz, AV = 2, and RL = 2 kΩ - a value explicitly specified in Sections 1 (Features) and 6.5/6.6 of the datasheet. This performance holds across 2.7–5.5 V supplies and −40°C to 125°C, enabling high-fidelity signal amplification in audio and precision measurement paths.
LMV651MGX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SC-70-5
LMV651MGX FAQ
1.How can I place an order for LMV651MGX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV651MGX 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 LMV651MGX reliable?
The price and inventory of LMV651MGX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV651MGX is usually 5 days.
3.What payment methods are accepted for LMV651MGX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV651MGX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV651MGX?
LMV651MGX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV651MGX 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 LMV651MGX?
For technical support, including LMV651MGX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV651MGX requirements.
6.How does Aetrix verify that LMV651MGX is sourced from the original manufacturer or authorized distributors?
All LMV651MGX 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 LMV651MGX meets industry standards.
7.What is the process for return or replacement of LMV651MGX?
All LMV651MGX units undergo pre-shipment inspection (PSI). If there is an issue with LMV651MGX, 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 LMV651MGX part is unused and in its original packaging.
Return procedure for LMV651MGX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV651MGX 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
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LM2904DGKR
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
Texas Instruments
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LM358P
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