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Texas Instruments LMV931MFX/NOPB
- Part No.:
- LMV931MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV931MFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,436
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Product details
Overview
LMV931MFX/NOPB from Texas Instruments is a single-channel, rail-to-rail input/output (RRIO) operational amplifier optimized for 1.8-V operation. It delivers 1.4-MHz gain bandwidth, 100-μA supply current per channel, 4-mV max input offset voltage, and output swing within 30 mV of rails under 2-kΩ load - enabling precision signal conditioning in ultra-low-power portable systems such as battery-powered health monitors and wearables.
For engineers reviewing the LMV931MFX/NOPB datasheet, LMV931MFX/NOPB pinout, LMV931MFX/NOPB application, or LMV931MFX/NOPB equivalent, this page provides verified specifications, package mapping to SOT-23 (5-pin), functional context for single-supply 1.8–5.5-V operation, and validated alternative options for low-voltage RRIO op-amp selection.
Technical Context
The LMV931MFX/NOPB implements a CMOS input stage with rail-to-rail common-mode input range extending 200 mV beyond supplies and rail-to-rail output swing capability. Its architecture supports stable operation driving 600-Ω loads and up to 1000-pF capacitive loads with minimal ringing, enabled by internal compensation tuned for 1.8-V supply.
It operates across −40°C to +125°C, features 101-dB DC open-loop gain, 78-dB typical CMRR at 1.8 V, and 100-dB PSRR - making it suitable for high-accuracy, low-drift sensing front-ends where supply headroom is constrained and DC precision is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct use with single-cell Li-ion (3.0–4.2 V), two-cell alkaline (2.4–3.2 V), or 1.8-V logic rails without level-shifting. |
| Gain Bandwidth Product | 1.4 MHz at 1.8 V - supports audio-band filtering, sensor amplification, and low-speed data acquisition with stable unity-gain configuration. |
| Input Offset Voltage (max) | 4 mV at 25°C - ensures ≤0.2% error in 1-V full-scale measurement without trimming, critical for battery voltage monitoring. |
| Supply Current (per channel) | 103 μA typical at 1.8 V - allows >1-year operation on a 100-mAh coin cell in always-on wearable sensor nodes. |
| Output Swing (2-kΩ load) | Within 30 mV of each rail at 1.8 V - preserves dynamic range in single-supply systems where signals must utilize full supply span. |
| Input Common-Mode Range | V− −0.2 V to V+ +0.2 V - permits biasing inputs below ground or above V+ for level-shifting and reference-based transducer interfaces. |
| Operating Temperature | −40°C to +125°C - qualified for industrial-grade embedded applications including automotive cabin sensors and portable medical devices. |
Pinout & Package
LMV931MFX/NOPB is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts in handheld and wearable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplifier output | Delivers rail-to-rail voltage swing; capable of sourcing/sinking ≥4 mA into 600-Ω load at 1.8 V. |
| 2: V− | Negative supply terminal | Accepts ground or negative rail; supports true single-supply (0 V to 1.8 V) or split-supply (±0.9 V) operation. |
| 3: IN− | Inverting input | Differential input node; high-impedance CMOS input (IB = 15 nA typ) minimizes loading on high-Z sources like pH electrodes. |
| 4: IN+ | Noninverting input | Primary signal input; shares same rail-to-rail common-mode range as IN−, enabling ground-referenced sensor interfaces. |
| 5: V+ | Positive supply terminal | Connects to main system rail (1.8–5.5 V); internal ESD protection rated to ±2000 V HBM. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 1.8-V supply in single-ended configurations - eliminates need for external charge pumps or dual supplies in portable designs. |
| 100-μA quiescent current | Reduces power budget impact in multi-op-amp signal chains; allows integration of gain stages without compromising battery life in IoT edge nodes. |
| Stable with 1000-pF capacitive load | Permits direct driving of ADC input capacitors or long PCB traces without external isolation resistors or phase-compensation networks. |
| −40°C to +125°C operation | Supports deployment in uncontrolled environments - e.g., wearable patches exposed to body heat or industrial handheld testers operating near machinery. |
| High PSRR (100 dB typ) | Maintains accuracy in noisy digital systems by rejecting supply ripple from shared LDOs or switching regulators powering mixed-signal SoCs. |
Applications
| Battery Voltage Monitoring | Wearable Heart Rate Sensor Front-End |
|---|---|
Use Scenario: Real-time tracking of Li-ion cell voltage during discharge cycles in Bluetooth earbuds or smartwatches. IC Role / Device Role / Timing Role: Precision buffer and level-shifting amplifier between battery tap and 12-bit SAR ADC input. Use Value: 4-mV VOS and rail-to-rail swing ensure <0.2% measurement error across 2.8–4.2 V range without calibration; 100-μA IQ extends runtime by >15% vs comparable op-amps. | Use Scenario: Amplifying weak photodiode current from PPG (photoplethysmography) LED pulses in fitness bands. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) stage converting nanoamp-level photocurrent to measurable voltage. Use Value: CMOS input (15 nA IB) prevents signal loss from high-impedance photodiode; 1.4-MHz GBW supports pulse fidelity up to 100 kHz modulation. |
| Portable ECG Electrode Interface | Low-Power Industrial Temperature Transmitter |
Use Scenario: Conditioning microvolt-level biopotential signals from dry-electrode ECG patches in clinical-grade wearables. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain block with adjustable feedback network. Use Value: 101-dB open-loop gain enables ≥1000× closed-loop gain stability; rail-to-rail input accepts electrode offsets up to ±200 mV without clipping. | Use Scenario: Signal conditioning for 2-wire RTD or thermistor bridges in battery-powered field sensors. IC Role / Device Role / Timing Role: Low-drift differential amplifier feeding analog front-end of sub-GHz wireless MCU. Use Value: 5.5 μV/°C TCVOS limits drift to <0.5 mV over −25°C to +75°C ambient; 125°C rating ensures reliability in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-voltage RRIO operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | Lower 0.65-mV max VOS, higher 1.5-mA IQ, 1-MHz GBW - trades precision for speed and consumes ~15× more current. | Better for DC-critical sensor calibrations; unsuitable for multi-day battery life targets due to quiescent current. | Select TLV9001IDBVR only when VOS < 1 mV is mandatory and power budget allows ≥1-mA per channel. |
| LPV821DBVR | Ultra-low 320-nA IQ, 10-kHz GBW, 1.5-mV max VOS - optimized for nanowatt sensing, not audio or medium-speed signal paths. | Ideal for wake-on-event environmental monitors; cannot support >10-kHz bandwidth requirements of PPG or audio preamps. | Choose LPV821DBVR when sub-1-μA supply current is non-negotiable and bandwidth needs are <10 kHz. |
Compared with TLV9001IDBVR and LPV821DBVR, LMV931MFX/NOPB uniquely balances 1.4-MHz bandwidth, 100-μA IQ, and 4-mV VOS - making it the optimal choice for portable medical and consumer electronics requiring both precision and multi-day battery operation.
Availability
LMV931MFX/NOPB is available at Aetrix Electronics and suitable for battery monitoring, wearable biosensors, portable ECG interfaces, and industrial temperature transmitters requiring stable component supply across extended product lifecycles.
Supply support for LMV931MFX/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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LMV93x-N family was designed specifically for ultra-low-voltage, rail-to-rail signal conditioning in space- and power-constrained portable systems - emphasizing 1.8-V compatibility, miniature packaging, and robust performance across extended temperature ranges.
FAQ
What supply voltage range does the LMV931MFX/NOPB support?
The LMV931MFX/NOPB operates from 1.8 V to 5.5 V, with full specification guaranteed at 1.8 V, 2.7 V, and 5 V. This range supports direct interfacing with single-cell Li-ion batteries (3.0–4.2 V), two-cell alkaline packs (2.4–3.2 V), and 1.8-V logic domains - eliminating level shifters in compact portable designs. The LMV931MFX/NOPB maintains rail-to-rail input/output functionality across this entire supply range.
Does the LMV931MFX/NOPB have rail-to-rail input and output capability?
Yes, the LMV931MFX/NOPB features true rail-to-rail input and output (RRIO). Its input common-mode voltage range extends 200 mV beyond both supply rails (V− −0.2 V to V+ +0.2 V), and its output swings within 30 mV of each rail under 2-kΩ load at 1.8 V. This allows the LMV931MFX/NOPB to interface directly with ground-referenced sensors and drive ADCs with maximum dynamic range in single-supply systems.
What is the typical quiescent current of the LMV931MFX/NOPB at 1.8 V?
The LMV931MFX/NOPB draws 103 μA typical supply current per channel at 1.8 V and 25°C, with a maximum of 205 μA across −40°C to +125°C. This ultra-low IQ enables multi-day operation on small batteries - for example, supporting >18 months of standby time in a 100-mAh coin-cell-powered wearable sensor node using continuous 100-Hz sampling. The LMV931MFX/NOPB's current consumption remains stable across its full operating voltage range.
Can the LMV931MFX/NOPB drive capacitive loads reliably?
Yes, the LMV931MFX/NOPB is internally compensated to drive up to 1000 pF capacitive loads with minimal ringing or instability - a key advantage over many general-purpose op-amps. This capability allows direct connection to ADC input capacitors, long PCB traces, or LCD bias networks without external isolation resistors. The LMV931MFX/NOPB maintains phase margin >67° and gain margin >7 dB even under these conditions, ensuring robust performance in mixed-signal layouts.
What package options are available for the LMV931MFX/NOPB?
The LMV931MFX/NOPB is offered exclusively in the 5-pin SOT-23 (DBV) package, measuring 2.90 mm × 1.60 mm - a footprint compatible with automated pick-and-place and reflow assembly. This compact size makes it ideal for space-constrained applications such as hearing aids, smart rings, and miniaturized medical patches. The LMV931MFX/NOPB does not use SC-70 or other variants; its orderable part number maps strictly to the SOT-23 package per TI's official documentation.
LMV931MFX/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:
- 0.42V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 14 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 116µA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 1.8 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
LMV931MFX/NOPB FAQ
1.How can I place an order for LMV931MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV931MFX/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 LMV931MFX/NOPB reliable?
The price and inventory of LMV931MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV931MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV931MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV931MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV931MFX/NOPB?
LMV931MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV931MFX/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 LMV931MFX/NOPB?
For technical support, including LMV931MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV931MFX/NOPB requirements.
6.How does Aetrix verify that LMV931MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV931MFX/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 LMV931MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV931MFX/NOPB?
All LMV931MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV931MFX/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 LMV931MFX/NOPB part is unused and in its original packaging.
Return procedure for LMV931MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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