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Texas Instruments LMV981MGX/NOPB
- Part No.:
- LMV981MGX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LMV981MGX/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,842
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Product details
Overview
LMV981MGX/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 into 600 Ω - ideal for battery monitoring and portable audio signal conditioning in space-constrained wearable systems.
For engineers reviewing the LMV981MGX/NOPB datasheet, LMV981MGX/NOPB pinout, LMV981MGX/NOPB application, or LMV981MGX/NOPB equivalent, key selection criteria include its 1.8-V minimum supply, shutdown-enabled ultra-low power mode (0.156 µA), rail-to-rail input beyond rails (±0.2 V), and DSBGA-6 package footprint (1.006 mm × 1.514 mm) for high-density PCB layouts.
Technical Context
The LMV981MGX/NOPB implements a CMOS input stage enabling rail-to-rail input common-mode range extending 200 mV beyond both supply rails, and an output stage capable of sourcing/sinking ≥4 mA while maintaining <105-mV rail proximity at 1.8 V with 600-Ω load. Its 1.4-MHz GBW and 0.35-V/µs slew rate support stable unity-gain buffering and low-frequency sensor amplification.
Shutdown functionality is controlled by a dedicated SHDN pin: device enters high-impedance output state and draws ≤1 µA when pin voltage falls below 0.55 V (1.8 V supply) or 0.8 V (2.7/5 V supplies); turnon time is 19 µs at 1.8 V, 12.5 µs at 2.7 V, and 8.4 µs at 5 V - enabling rapid power cycling in duty-cycled sensing nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5 V - supports direct connection to single-cell Li-ion (3.0–4.2 V), two-cell alkaline (2.4–3.2 V), or 1.8-V logic domains without level shifting. |
| Gain Bandwidth Product | 1.4 MHz - enables stable AC-coupled audio preamplification and DC-stable sensor signal conditioning up to ~100 kHz with gain ≤14. |
| Input Offset Voltage | Max 4 mV at 25°C - ensures ≤0.8% error in 200-mV full-scale battery voltage monitoring at room temperature. |
| Supply Current (Active) | 103 µA typical at 1.8 V - allows >1-year operation on a 100-mAh coin cell in always-on wearables with 1-kHz sampling. |
| Supply Current (Shutdown) | 0.156 µA typical at 1.8 V - reduces quiescent drain to sub-nA levels during deep sleep, critical for multi-year IoT endpoint battery life. |
| Output Swing (600 Ω) | Within 80 mV of rails at 1.8 V - preserves >95% dynamic range for 12-bit ADC interfacing 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 (e.g., shunt-based current monitoring). |
Pinout & Package
LMV981MGX/NOPB is packaged in a 6-pin DSBGA (YZR) with 0.4-mm pitch, body size 1.006 mm × 1.514 mm × 0.945 mm - optimized for ultra-thin wearable PCBs where height and area are constrained.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (C1) | Noninverting input | High-impedance CMOS node accepting signals from sensors, DACs, or resistive dividers without loading. |
| −IN (C2) | Inverting input | Accepts feedback network or inverted signal path; matched to +IN for precision differential gain configurations. |
| OUT (A2) | Amplifier output | Capable of driving 600-Ω loads and up to 1000-pF capacitive loads with minimal ringing - suitable for direct ADC input or filter interface. |
| SHDN (B1) | Shutdown control input | Active-high logic: device enabled when ≥1.0 V (1.8 V supply); output goes high-impedance and supply current drops to ≤1 µA when low. |
| V+ (A1) | Positive supply | Maximum 5.5 V absolute rating; accepts 1.8/2.7/5-V supplies; decoupling capacitor required within 2 mm for stability. |
| V− (B2) | Negative supply / ground | Supports single-supply (0 V) or split-supply (e.g., ±0.9 V) operation; must be low-impedance reference for rail-to-rail performance. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input beyond rails | Operates with input signals 200 mV below V− or above V+, enabling direct measurement of shunt voltages or overvoltage events. |
| Ultra-low shutdown current | 0.156 µA typical at 1.8 V - extends battery life in intermittent-sampling applications such as fitness tracker heart-rate monitoring. |
| 1.8-V optimized architecture | Guaranteed 1.4-MHz GBW and 101-dB open-loop gain at 1.8 V - eliminates need for voltage boosting in modern low-voltage SoC interfaces. |
| Fast wake-up from shutdown | 19-µs turnon time at 1.8 V - supports burst-mode sensing with minimal latency penalty between sleep and acquisition phases. |
| High DC gain (101 dB) | Enables precise closed-loop gain accuracy (<0.01%) in low-frequency instrumentation, such as thermistor or strain gauge amplifiers. |
Applications
| Battery Voltage Monitoring | Wearable Heart-Rate Sensor Signal Conditioning |
|---|---|
Use Scenario: Real-time tracking of single-cell Li-ion battery voltage during charge/discharge cycles in smartwatches. IC Role / Device Role / Timing Role: Precision buffer and level-shifter for ADC input, rejecting supply ripple via high PSRR (75 dB). Use Value: 80-mV rail-to-rail swing preserves 1.6-V effective input range at 1.8-V supply, maximizing 12-bit ADC utilization without external biasing. |
Use Scenario: Amplifying weak photodiode current from optical PPG sensors in fitness bands. IC Role / Device Role / Timing Role: Transimpedance amplifier with shutdown control synchronized to LED pulse timing. Use Value: 100-µA quiescent current and 19-µs wake-up enable 99% duty-cycle sleep, extending coin-cell life beyond 12 months. |
| Portable Audio Line Driver | Industrial 4–20-mA Loop Receiver |
Use Scenario: Driving stereo headphone outputs from low-voltage DACs in Bluetooth earbuds. IC Role / Device Role / Timing Role: Unity-gain buffer with rail-to-rail output swing to maximize audio dynamic range. Use Value: 600-Ω load capability and 0.35-V/µs slew rate support 20-kHz full-scale audio without distortion (THD = 0.023%). |
Use Scenario: Converting 4–20-mA loop current to 0–2.5-V analog signal for microcontroller ADC in factory sensor nodes. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with extended input common-mode range. Use Value: Input range down to V− −0.2 V allows direct connection to low-side current sense resistors referenced to system ground. |
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; same SOT-23-5 package but different pinout. | Lacks active power gating - unsuitable for duty-cycled sensing; requires external enable circuitry for low-power modes. | Select when shutdown functionality is unnecessary and board layout rework for pinout change is acceptable. |
| TLV9001IDBVR | Includes shutdown; 60-µA supply current; 1-MHz GBW; SC70-6 package; lower VOS (1.6 mV max) but reduced output drive (5 mA). | Better DC precision and lower power, but insufficient output swing margin for 600-Ω loads at 1.8 V (min 100 mV from rail). | Select when ultra-low power dominates over load drive strength, and 2-kΩ minimum load is guaranteed in the system. |
Compared with MCP6001T-E/OT and TLV9001IDBVR, LMV981MGX/NOPB uniquely balances shutdown control, 600-Ω drive capability at 1.8 V, and rail-to-rail input beyond rails - making it the only option among the three that meets all requirements for battery-powered shunt-monitoring and wearable biosensor front-ends without design compromises.
Availability
LMV981MGX/NOPB is available at Aetrix Electronics and suitable for battery monitoring, wearable sensor signal conditioning, and portable audio line driving requiring stable component supply across industrial, medical, and consumer electronics programs.
Supply support for LMV981MGX/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 signal chain solutions.
LMV981MGX/NOPB belongs to TI's LMV98x-N family of small, low-power, 1.8-V RRIO op amps - designed specifically for portable, battery-powered systems where supply voltage headroom, quiescent current, and physical size are critical constraints.
FAQ
What is the minimum operating supply voltage for LMV981MGX/NOPB?
The LMV981MGX/NOPB is fully specified and guaranteed to operate down to 1.8 V, with all key parameters - including 1.4-MHz gain bandwidth, 100-µA supply current, and rail-to-rail input/output - validated at this voltage. Operation below 1.8 V is not characterized and may result in degraded performance or functional failure.
Does LMV981MGX/NOPB support true rail-to-rail input, and how far beyond the rails does it extend?
Yes, LMV981MGX/NOPB supports 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 enables direct interfacing with signals below ground or above V+, such as current-sense shunt measurements in low-side configurations.
What is the typical output swing of LMV981MGX/NOPB into a 600-Ω load at 1.8-V supply?
At 1.8-V supply and 25°C, LMV981MGX/NOPB delivers output swing within 77–105 mV of each rail into a 600-Ω load - typically 80 mV from rail. This ensures >95% usable dynamic range for 12-bit ADCs operating from the same 1.8-V supply.
How fast does LMV981MGX/NOPB wake up from shutdown mode at 1.8-V supply?
LMV981MGX/NOPB has a typical turnon time of 19 µs from shutdown to full operation at 1.8-V supply. This enables rapid activation in burst-mode sensing applications, such as optical heart-rate monitoring, where microsecond-level latency is acceptable between sleep and acquisition.
Which package variants are available for LMV981MGX/NOPB, and which one corresponds to the /NOPB suffix?
LMV981MGX/NOPB uses the 6-pin DSBGA (YZR) package, measuring 1.006 mm × 1.514 mm × 0.945 mm. The /NOPB suffix denotes lead-free (Pb-free) and RoHS-compliant packaging - consistent across all LMV981-N orderables, including SC70-6 (DCK) and SOT-23-6 (DBV) variants.
LMV981MGX/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
LMV981MGX/NOPB FAQ
1.How can I place an order for LMV981MGX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV981MGX/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 LMV981MGX/NOPB reliable?
The price and inventory of LMV981MGX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV981MGX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV981MGX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV981MGX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV981MGX/NOPB?
LMV981MGX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV981MGX/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 LMV981MGX/NOPB?
For technical support, including LMV981MGX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV981MGX/NOPB requirements.
6.How does Aetrix verify that LMV981MGX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV981MGX/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 LMV981MGX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV981MGX/NOPB?
All LMV981MGX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV981MGX/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 LMV981MGX/NOPB part is unused and in its original packaging.
Return procedure for LMV981MGX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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