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Texas Instruments LMV981MG/NOPB
- Part No.:
- LMV981MG/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LMV981MG/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
LMV981MG/NOPB from Texas Instruments is a single-channel, rail-to-rail input/output operational amplifier optimized for 1.8-V operation in space-constrained, battery-powered systems. It delivers 1.4-MHz gain bandwidth, 100-µA supply current per channel, and output swing within 80 mV of rails under 600-Ω load - enabling precision signal conditioning in fitness trackers and portable audio interfaces.
For engineers reviewing the LMV981MG/NOPB datasheet, LMV981MG/NOPB pinout, LMV981MG/NOPB application, or LMV981MG/NOPB equivalent, key selection criteria include shutdown-enabled ultra-low power (0.156 µA in shutdown), extended input common-mode range (200 mV beyond rails), and DSBGA-6 package compatibility with high-density wearable PCB layouts.
Technical Context
The LMV981MG/NOPB implements a CMOS input stage with rail-to-rail input common-mode voltage extending from V− − 0.2 V to V+ + 0.2 V at 25°C, supporting true single-supply operation down to 1.8 V. Its output stage drives 600-Ω loads while maintaining <105-mV rail proximity at 1.8-V supply, with 0.35-V/µs slew rate and 67° phase margin ensuring stability with capacitive loads up to 1000 pF.
Shutdown functionality is implemented via a dedicated SHDN pin that places the output in high-impedance state and reduces supply current to ≤1 µA. Turnon time from shutdown is 19 µs at 1.8 V, enabling rapid power cycling in duty-cycled sensor front-ends without compromising settling performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5 V - supports direct interface with 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 - enables stable unity-gain buffer or gain-of-10 amplification up to 140 kHz in low-power sensor signal chains. |
| Input Offset Voltage | Max 4 mV at 25°C - ensures ≤0.4% error in 1-V full-scale battery monitoring circuits without trimming. |
| Supply Current (Active) | 103 µA typical at 1.8 V - allows >1-year operation on a 100-mAh coin cell in always-on wearable health monitors. |
| Output Swing (600 Ω) | Within 80 mV of rails at 1.8 V - preserves dynamic range in 1.8-V ADC interfaces with minimal headroom loss. |
| Input Common-Mode Range | V− − 0.2 V to V+ + 0.2 V - permits direct sensing of signals below ground or above supply in single-supply configurations. |
| Shutdown Current | 0.156 µA typical - reduces system standby power to nanoampere levels during sleep modes. |
Pinout & Package
LMV981MG/NOPB is packaged in a 6-pin DSBGA (YZR) with 1.006 mm × 1.514 mm footprint and 0.5-mm pitch. The package is lead-free, RoHS-compliant, and optimized for automated assembly on high-density flex and rigid-flex PCBs used in wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (C1) | Noninverting input | High-impedance CMOS node accepting signals from resistive sensors or filtered analog outputs without loading. |
| −IN (C2) | Inverting input | Accepts feedback network or reference voltage; supports transimpedance and difference-amplifier configurations. |
| OUT (A2) | Amplifier output | Rail-to-rail capable output driving 600-Ω loads directly into ADC inputs or audio codecs. |
| SHDN (B1) | Shutdown control input | Active-high logic input; pulls output to high-Z and cuts supply current when driven low (≤0.55 V). |
| V+ (A1) | Positive supply | Connects to main system rail (1.8–5 V); decoupling capacitor required within 1 mm for stability. |
| V− (B2) | Negative supply / Ground | Reference node for single-supply operation; must be low-impedance ground plane connection. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with extended common-mode range | Enables direct interfacing to unbuffered sensors and ADCs across full 1.8-V supply without level-shifting circuitry. |
| 19-µs turnon from shutdown | Permits microsecond-scale activation in event-driven sensor acquisition, minimizing idle power without sacrificing responsiveness. |
| 600-Ω load drive capability | Eliminates need for external output buffers when driving SAR ADCs or low-impedance audio paths in portable devices. |
| 101-dB large-signal voltage gain | Supports high-precision DC-coupled amplification (e.g., ECG front-end gain stages) with minimal gain error. |
| −40°C to 125°C operating temperature | Validates use in automotive cabin modules and industrial handheld test equipment exposed to wide thermal gradients. |
Applications
| Battery Voltage Monitoring | Wearable Biopotential Sensing |
|---|---|
|
Use Scenario: Real-time tracking of Li-ion cell voltage during charge/discharge cycles in smartwatches. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between battery terminal and 12-bit SAR ADC. Use Value: 80-mV rail-to-rail swing at 1.8 V preserves 95% of ADC input range, improving SOC estimation resolution by 3× vs. non-RRO op-amps. |
Use Scenario: Amplifying microvolt-level ECG signals from dry electrodes in fitness bands. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain block with DC-coupled input. Use Value: 4-mV max VOS and 101-dB gain ensure baseline stability and SNR > 70 dB over 0.05–150 Hz band without calibration. |
| Portable Audio Line Driver | Low-Power Sensor Signal Conditioning |
|
Use Scenario: Driving stereo headphone outputs from a 1.8-V codec in Bluetooth earbuds. IC Role / Device Role / Timing Role: Output line driver with shutdown-controlled mute during link disconnect. Use Value: 600-Ω drive capability and 0.35-V/µs slew rate support 20-kHz audio bandwidth with THD < 0.023% at 1-VPP. |
Use Scenario: Amplifying thermistor or RTD bridge outputs in wireless temperature nodes. IC Role / Device Role / Timing Role: Low-drift, low-power signal conditioner preceding sigma-delta ADC. Use Value: 5.5-µV/°C TCVOS and 100-µA quiescent current enable ±0.1°C accuracy with <1-µW average power in 10-s 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 | No shutdown pin; 100-µA supply current; 1-MHz GBW; SOT-23-5 package. | Lacks active power gating - unsuitable for duty-cycled sensor nodes requiring sub-µA standby. | Select when shutdown is unnecessary and board space permits larger SOT-23 footprint. |
| TLV9001IDBVR | Includes shutdown; 170-µA supply current; 1-MHz GBW; same SC70-6 footprint as LMV981MG/NOPB. | Higher quiescent current increases battery load; lower GBW limits bandwidth-critical audio paths. | Choose for pin-compatible replacement where 1-MHz bandwidth suffices and TI second-source assurance is required. |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV981MG/NOPB uniquely balances ultra-low shutdown current (0.156 µA), 1.4-MHz bandwidth, and DSBGA-6 size - making it optimal for miniaturized, long-life wearable systems demanding both precision and aggressive power cycling.
Availability
LMV981MG/NOPB is available at Aetrix Electronics and suitable for battery monitoring, wearable biopotential sensing, portable audio line driving, and low-power sensor signal conditioning requiring stable component supply across high-mix, low-volume production runs.
Supply support for LMV981MG/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 low-power signal chain solutions.
The LMV98x-N series was designed specifically for ultra-low-voltage, space-constrained portable electronics - delivering rail-to-rail performance at 1.8 V while minimizing quiescent current and package footprint.
FAQ
What is the minimum supply voltage for reliable operation of LMV981MG/NOPB?
The LMV981MG/NOPB is fully specified and guaranteed to operate from 1.8 V to 5 V. At 1.8 V, it maintains 1.4-MHz gain bandwidth, 100-µA supply current, and rail-to-rail output swing within 80 mV of rails under 600-Ω load - making LMV981MG/NOPB ideal for single-cell Li-ion and two-cell alkaline battery systems where voltage drops below 2.0 V during discharge.
Does LMV981MG/NOPB support true rail-to-rail input common-mode voltage?
Yes. LMV981MG/NOPB features an extended input common-mode range from V− − 0.2 V to V+ + 0.2 V at 25°C, verified across its full operating temperature range (−40°C to 125°C). This allows LMV981MG/NOPB to accurately amplify signals below ground or above the positive rail - critical for single-supply sensor interfaces without external level-shifting components.
How does the shutdown function behave on LMV981MG/NOPB?
The SHDN pin on LMV981MG/NOPB is active-high: the device operates normally when SHDN ≥ 1.0 V (at 1.8 V supply), and enters shutdown when SHDN ≤ 0.55 V. In shutdown, LMV981MG/NOPB reduces supply current to ≤1 µA and places the output in high-impedance state - enabling safe multiplexing and power gating in multi-channel sensor systems without signal contention.
Can LMV981MG/NOPB drive a 1000-pF capacitive load without oscillation?
Yes. LMV981MG/NOPB is characterized to remain stable driving up to 1000-pF capacitive loads with minimal ringing, thanks to its 67° phase margin and internal compensation. This capability allows LMV981MG/NOPB to directly drive ADC input capacitors, long PCB traces, or LCD bias networks without external isolation resistors - simplifying layout in compact wearable designs.
What package options are available for LMV981MG/NOPB, and which is used in this variant?
LMV981MG/NOPB is exclusively offered in the 6-pin DSBGA (YZR) package measuring 1.006 mm × 1.514 mm × 0.945 mm. This ultra-small footprint - smaller than SC70-6 and SOT-23-6 variants - is optimized for flex and rigid-flex PCBs in wearables. The 'MG' suffix in LMV981MG/NOPB explicitly denotes the DSBGA package; other variants use 'DCK' (SC70) or 'DBV' (SOT-23).
LMV981MG/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- SC-70-6
LMV981MG/NOPB FAQ
1.How can I place an order for LMV981MG/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV981MG/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 LMV981MG/NOPB reliable?
The price and inventory of LMV981MG/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV981MG/NOPB is usually 5 days.
3.What payment methods are accepted for LMV981MG/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV981MG/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV981MG/NOPB?
LMV981MG/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV981MG/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 LMV981MG/NOPB?
For technical support, including LMV981MG/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV981MG/NOPB requirements.
6.How does Aetrix verify that LMV981MG/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV981MG/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 LMV981MG/NOPB meets industry standards.
7.What is the process for return or replacement of LMV981MG/NOPB?
All LMV981MG/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV981MG/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 LMV981MG/NOPB part is unused and in its original packaging.
Return procedure for LMV981MG/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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