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Texas Instruments LMV981BL
- Part No.:
- LMV981BL
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-UFBGA
- Datasheet:
-
LMV981BL.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6USMD
- Quantity:
- Payment:
- Shipping:
Inventory:4,797
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Product details
Overview
LMV981BL 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 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 LMV981BL datasheet, LMV981BL pinout, LMV981BL application, or LMV981BL equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases in portable electronics, and validated alternative options for low-voltage, low-quiescent-current op-amp selection.
Technical Context
The LMV981BL implements a CMOS input stage with rail-to-rail input common-mode range extending 200 mV beyond both supply rails and rail-to-rail output drive capability. Its shutdown function (SHDN pin) reduces supply current to ≤1 µA while placing the output in high-impedance state.
It achieves stable operation driving 600-Ω resistive loads and up to 1000-pF capacitive loads with minimal ringing, supported by 67° phase margin at 1.8 V and 71° at 5 V. The device is specified across −40°C to +125°C and supports single-supply (1.8–5 V) or split-supply operation.
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 (3.0–4.2 V), two-cell alkaline (2.4–3.2 V), or 1.8-V logic domains. |
| Gain Bandwidth Product | 1.4 MHz (typ. at 1.8 V) - supports audio-band amplification and sensor signal conditioning without excessive power penalty. |
| Supply Current per Channel | 100 µA (typ. at 1.8 V) - allows continuous operation for years on coin-cell batteries in always-on monitoring applications. |
| Input Offset Voltage | 4 mV (max at 25°C) - ensures <1% error in 100-mV full-scale sensor interfaces without trimming. |
| Output Swing (600 Ω) | Within 80 mV of each rail at 1.8 V - delivers >95% dynamic range utilization in low-voltage ADC front-ends. |
| Shutdown Current | 0.156 µA (typ. at 25°C) - enables micro-power sleep modes with sub-µA system leakage budgets. |
| Turnon Time from Shutdown | 19 µs (at 1.8 V) - supports rapid wake-up in duty-cycled sensing nodes without compromising response latency. |
Pinout & Package
LMV981BL is available in a 6-pin DSBGA package (1.006 mm × 1.514 mm footprint) optimized for space-constrained portable PCBs. Pin functions are validated per TI SNOS976M Rev M datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (C1) | Noninverting input | High-impedance CMOS node accepting signals from 0.2 V below V− to 0.2 V above V+ - enables level-shifting and single-supply biasing. |
| −IN (C2) | Inverting input | Differential input pair node; used with feedback network to set closed-loop gain and configure transimpedance or difference amplifiers. |
| OUT (A2) | Amplifier output | Rail-to-rail capable output driving ≥600 Ω; high-impedance during shutdown - isolates downstream circuitry when disabled. |
| SHDN (B1) | Active-high shutdown control | Drives internal bias circuits off when pulled low; requires ≥1.0 V (1.8 V supply) to enable - compatible with GPIOs and logic-level sequencers. |
| V+ (A1) | Positive supply | Primary power connection; supports 1.8–5 V operation - must be decoupled with 100-nF ceramic capacitor near package. |
| V− (B2) | Negative supply / ground | Reference return path; may be connected to GND in single-supply mode or negative rail in split-supply configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with extended common-mode range | Input accepts signals 200 mV beyond supplies; output swings to within 80 mV of rails - maximizes usable voltage headroom in 1.8-V systems. |
| Ultra-low quiescent current | 100 µA per channel at 1.8 V - enables multi-year battery life in wearables and IoT edge nodes. |
| Fast shutdown recovery | 19 µs turnon time - supports burst-mode sensing without sacrificing responsiveness. |
| Capacitive load drive stability | Stable with up to 1000 pF - eliminates need for isolation resistors when driving ADC inputs or long traces. |
| Wide temperature range | Specified from −40°C to +125°C - suitable for automotive cabin modules and industrial handhelds. |
Applications
| Battery Voltage Monitoring | Wearable Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Real-time measurement of Li-ion cell voltage during charge/discharge cycles in smart bands. IC Role / Device Role / Timing Role: Precision buffer and level-shifter between battery divider and 12-bit SAR ADC, operating at 1.8 V. Use Value: 80-mV rail-to-rail swing preserves >95% of 1.8-V ADC input range; 100-µA quiescent current minimizes self-discharge impact. |
Use Scenario: Amplifying low-amplitude bio-potential signals (ECG/EMG) from dry electrodes in compact hearables. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with rail-to-rail input enabling zero-bias DC coupling. Use Value: 200-mV beyond-rail input range accommodates electrode offset drift; 1.4-MHz GBW supports 100-Hz bandwidth with margin. |
| Portable Audio Line Driver | Low-Power Supply Current Sensing |
|
Use Scenario: Driving stereo headphone outputs from a 3.3-V SoC in Bluetooth earbuds with volume control. IC Role / Device Role / Timing Role: Single-supply line driver configured as unity-gain follower with shutdown control for mute function. Use Value: 600-Ω load drive capability meets 16-Ω headphone impedance via external series resistor; shutdown reduces idle current to <1 µA. |
Use Scenario: Measuring system supply current in a wireless sensor node using a 10-mΩ sense resistor. IC Role / Device Role / Timing Role: Low-offset transimpedance amplifier converting shunt voltage to buffered analog output for ADC sampling. Use Value: 4-mV max VOS limits current measurement error to ±0.4 mA at 100-mA full scale; rail-to-rail output matches 1.8-V ADC reference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-voltage, low-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | Higher 1-MHz GBW, lower 0.3-mV VOS (max), but 170-µA IQ - consumes ~70% more quiescent current than LMV981BL at 1.8 V. | Better DC accuracy and speed; less suitable for multi-year coin-cell operation where µA budget is critical. | Choose TLV9001IDBVR when precision and bandwidth outweigh battery life requirements. |
| OPA316IDBVR | 2.5-mV VOS (max), 10-MHz GBW, 400-µA IQ - significantly faster and more accurate, but draws 4× more supply current. | Targeted at higher-performance portable audio or active filters; not viable for ultra-low-power always-on sensing. | Choose OPA316IDBVR only when >1-MHz bandwidth and sub-3-mV offset are mandatory design constraints. |
Compared with TLV9001IDBVR and OPA316IDBVR, LMV981BL offers the lowest quiescent current in its class (100 µA), making it uniquely suited for energy-harvesting and multi-year battery applications where µA-level IQ directly determines operational lifetime - despite modestly lower bandwidth and offset specs.
Availability
LMV981BL is available at Aetrix Electronics and suitable for battery monitoring, wearable sensor front-ends, and portable audio line drivers requiring stable component supply across industrial, medical, and consumer OEM programs.
Supply support for LMV981BL 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 LMV981BL belongs to TI's LMV98x-N family of small, low-power, 1.8-V RRIO op-amps designed specifically for portable, battery-powered equipment where rail-to-rail operation and micro-power consumption are essential.
FAQ
What supply voltage range does the LMV981BL support?
The LMV981BL operates from 1.8 V to 5 V, supporting single-supply configurations typical of Li-ion, alkaline, and logic-powered systems. It is fully specified across this range, including guaranteed performance at 1.8 V - the minimum recommended supply for optimal rail-to-rail behavior and low quiescent current. Operation below 1.8 V is not characterized or guaranteed.
Does the LMV981BL have rail-to-rail input and output capability?
Yes, the LMV981BL features true rail-to-rail input and output (RRIO). 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 to within 80 mV of each rail under 600-Ω load at 1.8 V. This enables full utilization of low-voltage ADCs and simplifies biasing in single-supply designs.
How does the shutdown feature work on the LMV981BL?
The LMV981BL enters shutdown when the SHDN pin is driven low (≤0.55 V at 1.8 V supply). In shutdown, supply current drops to ≤1 µA and the output becomes high-impedance. The device exits shutdown and resumes normal operation within 19 µs after SHDN rises above the turnon threshold (≥1.0 V at 1.8 V), enabling fast wake-up in duty-cycled systems.
What is the maximum capacitive load the LMV981BL can drive stably?
The LMV981BL is characterized to drive up to 1000 pF capacitive load with minimal ringing and stable phase margin (≥67° at 1.8 V). This eliminates the need for external isolation resistors when interfacing directly with ADC inputs, long PCB traces, or filtering networks - simplifying layout and reducing component count in space-constrained designs.
Is the LMV981BL suitable for automotive applications?
Yes, the LMV981BL is qualified for operation from −40°C to +125°C and specified across that full temperature range. While not AEC-Q200 qualified, its extended temperature rating and robust electrical characteristics make it suitable for non-safety-critical automotive cabin applications such as infotainment sensors, climate control interfaces, and body electronics where industrial-grade reliability is required.
LMV981BL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-UFBGA
- 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:
- 6-µSMD (1.01x1.51)
LMV981BL FAQ
1.How can I place an order for LMV981BL through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV981BL 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 LMV981BL reliable?
The price and inventory of LMV981BL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV981BL is usually 5 days.
3.What payment methods are accepted for LMV981BL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV981BL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV981BL?
LMV981BL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV981BL 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 LMV981BL?
For technical support, including LMV981BL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV981BL requirements.
6.How does Aetrix verify that LMV981BL is sourced from the original manufacturer or authorized distributors?
All LMV981BL 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 LMV981BL meets industry standards.
7.What is the process for return or replacement of LMV981BL?
All LMV981BL units undergo pre-shipment inspection (PSI). If there is an issue with LMV981BL, 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 LMV981BL part is unused and in its original packaging.
Return procedure for LMV981BL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV981BL Tags
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