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Texas Instruments LMV551MFX/NOPB
- Part No.:
- LMV551MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV551MFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:21,467
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Product details
Overview
LMV551MFX/NOPB from Texas Instruments is a single-channel, rail-to-rail output, micropower operational amplifier optimized for battery-powered and space-constrained systems. It delivers 3 MHz unity-gain bandwidth, 37 µA supply current per amplifier, and 70 mV rail-to-rail output swing (at 100 kΩ load, 5 V supply), enabling precision signal conditioning in portable instrumentation and automotive sensor interfaces.
For engineers reviewing the LMV551MFX/NOPB datasheet, LMV551MFX/NOPB pinout, LMV551MFX/NOPB application, or LMV551MFX/NOPB equivalent, key selection criteria include ultra-low quiescent current, −40°C to +125°C operation, input common-mode range extending to ground, and compatibility with 2.7–5.5 V single-supply systems.
Technical Context
The LMV551MFX/NOPB employs TI's VIP50 CMOS process to achieve exceptional bandwidth-to-power efficiency (3 MHz at 37 µA). Its input stage supports ground-sensing operation with rail-to-rail common-mode range, while the output stage drives within 70 mV of both supply rails under light loads.
It is unity-gain stable but requires external compensation (e.g., isolation resistor or in-loop RC network) when driving capacitive loads >100 pF. Phase margin remains ≥75° with 10 kΩ resistive load and 20 pF capacitive load, ensuring robust stability in standard gain configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 3 MHz - enables audio-band filtering and fast sensor signal amplification without excessive power penalty |
| Supply Current per Amplifier | 37 µA at 5 V - supports multi-year battery life in always-on IoT nodes and portable medical devices |
| Input Offset Voltage | 3 mV max at 25°C - ensures <0.1% error in 3 V full-scale sensor front-ends without trimming |
| Output Swing (100 kΩ) | 70 mV from rail (high), 60 mV from rail (low) at 5 V - maximizes dynamic range in single-supply data acquisition |
| CMRR / PSRR | 93 dB / 90 dB - rejects supply noise and common-mode interference in noisy automotive or industrial environments |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| Input Voltage Noise | 70 nV/√Hz at 1 kHz - suitable for low-level transducer amplification where noise dominates resolution |
Pinout & Package
LMV551MFX/NOPB is packaged in a 5-pin SC70 (2.00 mm × 1.25 mm) - one of the smallest surface-mount op amp packages available, ideal for wearables and miniaturized sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +IN | Noninverting Input | Accepts signal referenced to ground; supports DC-coupled inputs down to V− |
| 2: V− | Negative Supply | Connect to ground in single-supply operation; enables true ground-sensing capability |
| 3: −IN | Inverting Input | Used for feedback configuration; high impedance (>10⁹ Ω) minimizes loading on source |
| 4: OUT | Amplifier Output | Rail-to-rail capable; drives 100 kΩ loads to within 70 mV of either supply rail |
| 5: V+ | Positive Supply | Operates from 2.7 V to 5.5 V; internal regulation ensures consistent performance across voltage range |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers >98% of full supply voltage range at light loads, preserving ADC input headroom in 3.3 V systems |
| Ground-sensing input | Common-mode range extends to V− (ground), enabling direct interface with 0 V-referenced sensors like thermistors |
| Ultra-low 37 µA quiescent current | Reduces system standby power by >50% vs comparable 1–5 MHz op amps, critical for coin-cell applications |
| 70 nV/√Hz input voltage noise | Enables sub-10 µV RMS noise floor in 10 Hz–10 kHz bandwidths, supporting high-resolution analog front-ends |
| Specified 3 V and 5 V operation | Guarantees performance across common battery chemistries (Li-ion, alkaline, coin cell) without derating |
Applications
| Portable Medical Sensors | Automotive Cabin Sensors |
|---|---|
Use Scenario: Amplifying low-amplitude signals from wearable ECG electrodes or pulse oximetry photodiodes. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail input/output signal conditioner with minimal offset drift over temperature. Use Value: Enables >12-bit effective resolution in battery-powered devices with 3.3 V supply and no external reference. |
Use Scenario: Signal conditioning for cabin temperature, humidity, and CO₂ sensors in automotive HVAC modules. IC Role / Device Role / Timing Role: Precision buffer and gain stage operating across −40°C to +125°C ambient range. Use Value: Maintains <±0.5°C measurement accuracy without calibration due to low TC VOS (3.3 µV/°C) and high CMRR. |
| Industrial Battery Monitors | Smart Home Motion Detectors |
Use Scenario: Amplifying voltage drops across shunt resistors in Li-ion battery protection ICs. IC Role / Device Role / Timing Role: High-PSRR current-sense amplifier with 2.7–5.5 V supply flexibility and low input bias current (38 nA). Use Value: Achieves ±1% current measurement accuracy across full battery discharge curve without self-heating error. |
Use Scenario: Conditioning PIR sensor outputs in ultra-low-power occupancy detectors with multi-year battery life. IC Role / Device Role / Timing Role: Micropower active filter and comparator driver in always-on wake-up circuitry. Use Value: Draws only 37 µA continuously, extending CR2032 battery life beyond 5 years at 1-second sampling intervals. |
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 supply current (100 µA), same SC70-5 package | Less suitable for audio-band or fast transient response; better for cost-sensitive, lower-speed designs | Select when bandwidth >2 MHz is unnecessary and budget constraints outweigh power savings |
| TSV611ICT | Higher offset voltage (4.5 mV), lower PSRR (75 dB), same 37 µA supply current and SC70-5 footprint | Reduced noise immunity in noisy automotive or industrial supply rails | Choose only if TI supply chain continuity is unavailable and PSRR >85 dB is not required |
Compared with MCP6001T-E/OT and TSV611ICT, LMV551MFX/NOPB provides superior bandwidth-to-power ratio and tighter DC specifications-critical for precision, low-voltage, and wide-temperature applications where signal fidelity and battery longevity are prioritized over unit cost.
Availability
LMV551MFX/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, automotive cabin sensors, and industrial battery monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV551MFX/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 design.
LMV551MFX/NOPB belongs to TI's LMV55x micropower op amp family, engineered specifically for battery-operated instrumentation and automotive sensor interfaces demanding high bandwidth, rail-to-rail operation, and extended temperature reliability.
FAQ
What is the maximum capacitive load the LMV551MFX/NOPB can drive without external compensation?
The LMV551MFX/NOPB maintains stability with ≤100 pF capacitive load when driving a 10 kΩ resistive load. For loads exceeding 100 pF, external compensation-such as an isolation resistor (5–50 Ω) or in-loop RC network-is required to preserve phase margin ≥75° and prevent oscillation. This limitation stems from its optimized 3 MHz bandwidth at 37 µA quiescent current.
Does the LMV551MFX/NOPB support true single-supply operation with input signals at ground potential?
Yes. The LMV551MFX/NOPB features an input common-mode voltage range that extends to V− (ground), allowing it to accurately amplify signals referenced to 0 V in single-supply configurations. This makes it suitable for interfacing directly with grounded sensors such as thermistors, RTDs, or bridge-based pressure transducers without level-shifting circuitry.
What is the typical output voltage swing of the LMV551MFX/NOPB at 3.3 V supply with 100 kΩ load?
At 3.3 V supply and 25°C, the LMV551MFX/NOPB delivers a typical output swing of 40 mV above V− (ground) and 48 mV below V+ (3.3 V), meaning it operates from ~40 mV to ~3.26 V. This rail-to-rail capability ensures >97% usable dynamic range, maximizing resolution when paired with 12-bit ADCs in low-voltage systems.
How does the LMV551MFX/NOPB perform in terms of input-referred voltage noise?
The LMV551MFX/NOPB exhibits a flatband input-referred voltage noise density of 70 nV/√Hz at 1 kHz and 100 kHz, with a low 1/f noise corner at 4 Hz. This noise profile supports high-fidelity amplification of low-frequency sensor signals-such as those from strain gauges or electrochemical sensors-without degrading signal-to-noise ratio in bandwidths up to 10 kHz.
Is the LMV551MFX/NOPB pin-compatible with other members of the LMV55x family?
No. The LMV551MFX/NOPB is a single-channel device in 5-pin SC70, while LMV552 (dual) uses 8-pin VSSOP and LMV554 (quad) uses 14-pin TSSOP. Pin functions differ across variants-only the LMV551 derivatives (e.g., LMV551IDBVR, LMV551IDCKR) share identical 5-pin SC70/SOT-23 pinout and electrical behavior with LMV551MFX/NOPB.
LMV551MFX/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:
- 1V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 37µA
- 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
LMV551MFX/NOPB FAQ
1.How can I place an order for LMV551MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV551MFX/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 LMV551MFX/NOPB reliable?
The price and inventory of LMV551MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV551MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV551MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV551MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV551MFX/NOPB?
LMV551MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV551MFX/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 LMV551MFX/NOPB?
For technical support, including LMV551MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV551MFX/NOPB requirements.
6.How does Aetrix verify that LMV551MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV551MFX/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 LMV551MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV551MFX/NOPB?
All LMV551MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV551MFX/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 LMV551MFX/NOPB part is unused and in its original packaging.
Return procedure for LMV551MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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