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Texas Instruments LMV981MG
- Part No.:
- LMV981MG
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LMV981MG.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,487
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Product details
Overview
LMV981MG 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 rails into 600-Ω load - enabling precision signal conditioning in space-constrained, battery-powered systems such as wearable health monitors and portable audio interfaces.
For engineers reviewing the LMV981MG datasheet, LMV981MG pinout, LMV981MG application, or LMV981MG 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 compatibility with DSBGA/SC70/SOT-23 packages - critical for low-power analog front-end design in Li-ion–powered devices.
Technical Context
The LMV981MG implements a CMOS input stage enabling rail-to-rail input common-mode voltage range extending 200 mV beyond supplies (V− −0.2 V to V+ +0.2 V), paired with a robust output stage capable of driving 600-Ω loads and up to 1000-pF capacitive loads with minimal ringing. Its architecture supports stable unity-gain operation across 1.8–5-V supply range.
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 exhibits 101-dB DC open-loop gain and 60-dB minimum CMRR over extended temperature, ensuring accuracy in low-frequency sensor amplification and supply monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5 V - enables direct interface with single-cell Li-ion (2.7–4.2 V) and two-cell alkaline/NiMH (2.4–3.2 V) batteries without regulation. |
| Gain Bandwidth Product | 1.4 MHz at 1.8 V - supports stable closed-loop operation up to ~100 kHz with moderate gain, suitable for ECG front-ends and audio preamps. |
| Input Offset Voltage | Max 4 mV at 25°C - ensures ≤0.2% error in 1-V full-scale sensor signal paths without trimming. |
| Output Swing (600 Ω) | Within 80 mV of each rail at 1.8 V - delivers >95% usable dynamic range in low-voltage ADC driver applications. |
| Supply Current (per channel) | 103 µA typical at 1.8 V - allows continuous operation for >1 year on a 200-mAh coin cell in always-on wearable sensors. |
| Turnon Time from Shutdown | 19 µs at 1.8 V - enables rapid wake-up in duty-cycled systems like pulse oximeters without compromising response latency. |
| Operating Temperature | −40°C to 125°C - qualified for under-hood automotive cabin sensors and industrial IoT edge nodes. |
Pinout & Package
LMV981MG is available in SC70-6 (DCK) package: 2.00 mm × 1.25 mm footprint, 0.95-mm height, 0.65-mm pitch. Pinout matches industry-standard SC70-6 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN | Noninverting input | High-impedance (≥1012 Ω) node accepting signals from resistive sensors or filtered transducer outputs. |
| −IN | Inverting input | Feedback node for configuring gain, filtering, or current-to-voltage conversion with precision resistors. |
| OUT | Amplifier output | Capable of sourcing/sinking ≥4 mA into 600-Ω load while maintaining rail-to-rail swing - drives ADC inputs or small speakers directly. |
| SHDN | Active-low shutdown control | Pulled high to V+ to enable; driven low (<0.55 V at 1.8 V) to reduce supply current to ≤1 µA and isolate output. |
| V+ | Positive supply | Accepts 1.8–5 V; must be decoupled with ≥0.1-µF ceramic capacitor placed <1 mm from pin to minimize noise coupling. |
| V− | Negative supply / ground | Connected to system ground in single-supply configurations; supports split-supply operation down to −2.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with extended common-mode range | Input accepts signals 200 mV beyond V− and V+, enabling direct connection to unbuffered thermistor or battery voltage dividers without level-shifting. |
| Ultra-low quiescent current | 103 µA at 1.8 V - reduces power budget impact in multi-sensor nodes where amplifiers dominate standby consumption. |
| Stable capacitive load drive | Supports up to 1000-pF load with minimal overshoot - eliminates need for isolation resistors when driving long PCB traces or ADC input capacitance. |
| Fast shutdown recovery | 19-µs turnon time - permits microsecond-scale signal acquisition bursts in energy-harvesting systems with intermittent power. |
| High DC open-loop gain | 101 dB - ensures <0.001% gain error in precision instrumentation amplifiers using 100× closed-loop gain. |
Applications
| Battery Voltage Monitoring | Wearable Biopotential Sensing |
|---|---|
|
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: Buffer and level-shift raw divider output to match 12-bit SAR ADC input range while rejecting supply ripple. Use Value: 80-mV rail proximity at 1.8 V enables full 0–4.2 V coverage using only 2.2-MΩ/1-MΩ resistor divider, eliminating external reference or op-amp gain stages. |
Use Scenario: Amplifying microvolt-level ECG signals from dry electrodes in compact fitness trackers. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with adjustable gain and DC-coupled baseline stabilization. Use Value: 100-µA supply current and 1.4-MHz GBW support 100× gain with >100-Hz bandwidth while consuming <0.2 mW - extending battery life beyond 7 days. |
| Portable Audio Line Driver | Industrial Sensor Signal Conditioning |
|
Use Scenario: Driving 32-Ω headphones from a 1.8-V DAC output in Bluetooth earbuds. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail output buffer with shutdown control synchronized to audio playback state. Use Value: 60-nV/√Hz input voltage noise and 4-mA output drive capability deliver SNR >95 dB(A) without requiring additional output filtering or boost circuitry. |
Use Scenario: Conditioning 4–20 mA loop transmitter outputs in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with programmable gain and fault detection via shutdown pin. Use Value: 4-mV max VOS and 5.5-µV/°C TCVOS ensure <0.1% full-scale error over −40°C to 85°C ambient - meeting Class A industrial accuracy requirements. |
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 1-MHz GBW; 2-mV max VOS at 25°C. | Lacks active power gating - unsuitable for duty-cycled sensing; better for always-on ultra-low-power biasing. | Select when shutdown is unnecessary and 1-MHz bandwidth suffices; verify stability with target capacitive load. |
| TLV9001IDBVR | Higher 100-µA supply current; 1-MHz GBW; includes EMI-hardened input; 0.75-mV max VOS. | Superior noise immunity in noisy industrial environments; tighter offset improves DC accuracy in precision bridges. | Prefer for EMI-prone applications (e.g., motor-driven wearables); confirm layout adherence to TI's EMI mitigation guidelines. |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV981MG uniquely balances shutdown capability, 1.4-MHz bandwidth, and rail-to-rail I/O at 1.8 V - making it optimal for battery-constrained systems requiring both fast wake-up and wide dynamic range.
Availability
LMV981MG is available at Aetrix Electronics and suitable for battery monitoring, wearable biopotential sensing, portable audio line driving, and industrial sensor signal conditioning requiring stable component supply across automotive, medical, and consumer electronics programs.
Supply support for LMV981MG 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 LMV981MG belongs to TI's LMV98x-N family of small, low-power RRIO op-amps designed specifically for 1.8-V–5-V battery-powered applications where space, power, and rail-to-rail performance are critical - including wearables, portable medical devices, and energy-efficient industrial sensors.
FAQ
What supply voltage range does the LMV981MG support?
The LMV981MG operates from 1.8 V to 5 V, with guaranteed specifications at 1.8 V, 2.7 V, and 5 V. This makes it compatible with single-cell Li-ion (2.7–4.2 V), two-cell alkaline (2.4–3.2 V), and regulated 3.3-V or 5-V systems. Absolute maximum supply is 5.5 V, and operation below 1.8 V is not characterized or supported.
Does the LMV981MG have rail-to-rail input and output capability?
Yes, the LMV981MG features true rail-to-rail input and output. Its input common-mode voltage extends 200 mV beyond both supply rails (V− −0.2 V to V+ +0.2 V), and its output swings within 80 mV of each rail into a 600-Ω load at 1.8 V - delivering >95% of full-scale dynamic range in low-voltage applications.
How does the shutdown function work on the LMV981MG?
The LMV981MG uses an active-low SHDN pin: pulling it below 0.55 V (at 1.8 V supply) disables the amplifier, reducing supply current to ≤1 µA and placing the output in high-impedance state. Pulling SHDN ≥1 V enables normal operation. Turnon time from shutdown is 19 µs at 1.8 V, supporting rapid signal acquisition in burst-mode systems.
What package options are available for the LMV981MG?
The LMV981MG is offered in SC70-6 (DCK) package: 2.00 mm × 1.25 mm body size, 0.65-mm lead pitch, and 0.95-mm maximum height. It shares pinout compatibility with other SC70-6 op-amps, simplifying board reuse. DSBGA and SOT-23 variants exist under different part numbers (e.g., LMV981YZR, LMV981DBVR), but LMV981MG specifically denotes the SC70-6 variant.
What is the typical input offset voltage and drift of the LMV981MG?
The LMV981MG has a maximum input offset voltage of 4 mV at 25°C and 6 mV over −40°C to 125°C. Its typical offset voltage drift is 5.5 µV/°C - meaning total drift over a 100°C span adds ≤0.55 mV, preserving accuracy in temperature-varying environments like automotive cabins or outdoor wearables.
LMV981MG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SC-70-6
LMV981MG FAQ
1.How can I place an order for LMV981MG through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV981MG 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 LMV981MG reliable?
The price and inventory of LMV981MG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV981MG is usually 5 days.
3.What payment methods are accepted for LMV981MG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV981MG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV981MG?
LMV981MG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV981MG 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 LMV981MG?
For technical support, including LMV981MG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV981MG requirements.
6.How does Aetrix verify that LMV981MG is sourced from the original manufacturer or authorized distributors?
All LMV981MG 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 LMV981MG meets industry standards.
7.What is the process for return or replacement of LMV981MG?
All LMV981MG units undergo pre-shipment inspection (PSI). If there is an issue with LMV981MG, 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 LMV981MG part is unused and in its original packaging.
Return procedure for LMV981MG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV981MG Tags
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LM358DT
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