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Texas Instruments LMV981MFX/NOPB
- Part No.:
- LMV981MFX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
LMV981MFX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,317
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Product details
Overview
LMV981MFX/NOPB from Texas Instruments is a single-channel, rail-to-rail input/output operational amplifier optimized for 1.8-V operation, delivering 1.4-MHz gain bandwidth, 100-µA supply current per channel, and output swing within 80 mV of the rails under 600-Ω load - enabling precision signal conditioning in ultra-low-power battery-powered systems such as fitness trackers and wearable sensors.
For engineers reviewing the LMV981MFX/NOPB datasheet, LMV981MFX/NOPB pinout, LMV981MFX/NOPB application, or LMV981MFX/NOPB equivalent, key selection criteria include its 1.8-V minimum supply, shutdown functionality with 19-µs turnon time, −40°C to 125°C operating range, and DSBGA-6 package footprint (1.5 mm × 1.3 mm), critical for space-constrained portable electronics design.
Technical Context
The LMV981MFX/NOPB implements a CMOS input stage with rail-to-rail input common-mode range extending 200 mV beyond both supply rails, supporting true single-supply operation down to 1.8 V. Its output stage drives 600-Ω loads while maintaining stability with up to 1000-pF capacitive loads.
Shutdown control is active-low on the SHDN pin, placing the output in high-impedance state and reducing quiescent current to ≤1 µA. The device achieves 101-dB DC open-loop gain and 0.35-V/µs slew rate at 1.8 V, balancing speed and power efficiency for sensor front-ends and supply monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5 V - supports direct interface with single-cell Li-ion (3.0–4.2 V) and two-cell alkaline (2.4–3.2 V) batteries without regulation. |
| Gain Bandwidth Product | 1.4 MHz at 1.8 V - enables stable unity-gain buffer or low-gain amplification for audio-band and sensor signals up to ~100 kHz. |
| Input Offset Voltage | Max 4 mV at 25°C - ensures ≤0.2% error in 12-bit ADC reference buffering or current-sense amplifier applications. |
| Supply Current per Channel | 103 µA typical at 1.8 V - allows >1-year battery life in coin-cell-powered wearables with duty-cycled operation. |
| Output Swing (600 Ω) | Within 80 mV of rails at 1.8 V - preserves dynamic range in low-voltage data acquisition chains without level-shifting. |
| Input Common-Mode Range | V− −0.2 V to V+ +0.2 V - permits sensing below ground or above supply in single-supply configurations (e.g., battery voltage monitoring). |
| Shutdown Current | ≤1 µA at 25°C - reduces system standby power by >99% versus active mode, critical for always-on sensor nodes. |
Pinout & Package
LMV981MFX/NOPB is packaged in a 6-pin DSBGA (YZR) with nominal body size 1.50 mm × 1.30 mm and 0.945-mm height, designed for minimal PCB area and thermal performance (RθJA = 138.2°C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| +IN | Noninverting input | High-impedance node (15 nA bias current) accepting signals from sensors or DACs across full rail-to-rail common-mode range. |
| −IN | Inverting input | Accepts feedback network or differential signal; matched to +IN for <6 mV offset over temperature. |
| OUT | Amplifier output | Capable of sourcing/sinking ≥4 mA into 600-Ω load while maintaining rail-to-rail swing and low THD (0.023%). |
| SHDN | Active-low shutdown enable | Pulled low disables amplifier and forces output high-Z; logic threshold is 1.0 V (min) at 1.8 V supply. |
| V+ | Positive supply | Connects to main system rail (1.8–5 V); internal ESD protection rated to ±2000 V HBM. |
| V− | Negative supply / ground | Serves as reference for single-supply operation; supports true ground-referenced inputs and outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with extended common-mode range | Inputs operate −0.2 V to V+ +0.2 V; outputs swing to within 80 mV of rails - eliminates need for level shifters in 1.8-V systems. |
| Ultra-low quiescent current | 103 µA typical at 1.8 V - enables continuous sensor monitoring in energy-harvesting or coin-cell designs. |
| Fast shutdown recovery | 19-µs turnon time from shutdown - supports rapid wake-up in duty-cycled IoT endpoints without signal settling delay. |
| Stable capacitive load drive | Drives up to 1000-pF loads with minimal ringing - simplifies anti-aliasing filter design and eliminates external isolation resistors. |
| Wide temperature operation | Specified from −40°C to +125°C - suitable for automotive cabin modules and industrial edge sensors without derating. |
Applications
| Battery Voltage Monitoring | Wearable Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Real-time measurement of single-cell Li-ion battery voltage during charge/discharge cycles in smart bands. IC Role / Device Role / Timing Role: Precision buffer and level translator between battery terminal and 12-bit SAR ADC input. Use Value: Input common-mode range extending 200 mV below ground enables accurate 0–4.2 V measurement using 1.8-V ADC reference without external op-amp biasing. |
Use Scenario: Amplifying microvolt-level signals from photoplethysmography (PPG) LEDs and photodiodes in fitness trackers. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail transimpedance and gain stage preceding ADC sampling at 100 Hz–1 kHz. Use Value: 60 nV/√Hz input voltage noise and 101-dB DC gain preserve weak physiological signal integrity while consuming <100 µA. |
| Portable Audio Line Driver | Supply Current Sensing |
|
Use Scenario: Driving stereo headphone outputs from a low-voltage DAC in Bluetooth earbuds powered by 1.8-V LDO. IC Role / Device Role / Timing Role: Unity-gain buffer isolating DAC output from variable headphone impedance (16–32 Ω). Use Value: 600-Ω load capability and 80-mV rail proximity deliver >1.7 VPP swing at 1.8 V supply, meeting line-level audio requirements. |
Use Scenario: Measuring system supply current via shunt resistor in battery management ICs for portable medical devices. IC Role / Device Role / Timing Role: High-side or low-side current-sense amplifier with programmable gain and shutdown control. Use Value: Shutdown current ≤1 µA minimizes measurement circuit overhead; 4-mV max VOS ensures <1% error at 100-mΩ shunt with 1-A load. |
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 | No shutdown pin; 1-µA lower supply current but only 1-MHz GBW and 10-mV max VOS. | Lacks active power control - unsuitable for duty-cycled systems requiring microsecond wake-up. | Select when shutdown is unnecessary and cost sensitivity outweighs precision and speed requirements. |
| TLV9001IDBVR | Higher 1.5-MHz GBW and 0.5-mV max VOS, but 250-µA supply current and no extended common-mode range. | Cannot sense below ground or above supply - limits use in high-side current sensing or bipolar signal conditioning. | Select when higher DC accuracy and bandwidth justify 2.5× higher quiescent current and loss of rail extension. |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV981MFX/NOPB uniquely combines shutdown control, rail extension, and sub-100-µA operation - making it the only option among the three for ultra-low-power, ground-sensing, and fast-wake applications in wearables.
Availability
LMV981MFX/NOPB is available at Aetrix Electronics and suitable for battery monitoring, wearable sensor interfaces, portable audio line driving, and supply current sensing requiring stable component supply across automotive, industrial, and consumer production programs.
Supply support for LMV981MFX/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 company specializing in analog and embedded processing technologies, with leadership in low-power signal chain solutions.
The LMV981MFX/NOPB belongs to TI's LMV98x-N family of small, low-power RRIO op-amps engineered specifically for 1.8-V battery-powered systems - emphasizing minimal supply current, rail extension, and ultra-small packaging for wearables and portable medical devices.
FAQ
What is the minimum supply voltage for reliable operation of LMV981MFX/NOPB?
The LMV981MFX/NOPB is fully specified and guaranteed to operate from 1.8 V to 5 V. At 1.8 V, it delivers 1.4-MHz gain bandwidth, 100-µA supply current, and rail-to-rail output swing within 80 mV of the rails under 600-Ω load - making LMV981MFX/NOPB ideal for single-cell Li-ion and two-cell alkaline battery systems where headroom is constrained.
Does LMV981MFX/NOPB support true rail-to-rail input operation?
Yes, LMV981MFX/NOPB features rail-to-rail input with common-mode voltage range extending 200 mV beyond both supply rails (V− −0.2 V to V+ +0.2 V). This allows LMV981MFX/NOPB to accurately condition signals below ground or above V+ in single-supply configurations - essential for high-side current sensing and battery voltage monitoring.
How fast does LMV981MFX/NOPB recover from shutdown mode?
LMV981MFX/NOPB has a typical turnon time of 19 µs from shutdown to full operation at 1.8 V. This fast wake-up enables LMV981MFX/NOPB to be used in duty-cycled sensor nodes where microcontroller-triggered measurement bursts require immediate signal path readiness without compromising average power.
What package options are available for LMV981MFX/NOPB?
LMV981MFX/NOPB is offered in the 6-pin DSBGA (YZR) package with nominal dimensions 1.50 mm × 1.30 mm × 0.945 mm. This ultra-compact footprint matches the "MFX" suffix designation and is optimized for area-constrained PCBs in wearables and hearing aids - distinct from SC70 or SOT-23 variants of the LMV981-N family.
Can LMV981MFX/NOPB drive capacitive loads without oscillation?
Yes, LMV981MFX/NOPB is characterized to drive up to 1000-pF capacitive loads while maintaining phase margin ≥67° and minimal ringing. This capability allows LMV981MFX/NOPB to directly interface with anti-aliasing filters, long PCB traces, or LCD bias networks without requiring external isolation resistors or compensation components.
LMV981MFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- 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 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
LMV981MFX/NOPB FAQ
1.How can I place an order for LMV981MFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV981MFX/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 LMV981MFX/NOPB reliable?
The price and inventory of LMV981MFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV981MFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV981MFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV981MFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV981MFX/NOPB?
LMV981MFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV981MFX/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 LMV981MFX/NOPB?
For technical support, including LMV981MFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV981MFX/NOPB requirements.
6.How does Aetrix verify that LMV981MFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV981MFX/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 LMV981MFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV981MFX/NOPB?
All LMV981MFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV981MFX/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 LMV981MFX/NOPB part is unused and in its original packaging.
Return procedure for LMV981MFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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