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Texas Instruments LMV981IDCKR
- Part No.:
- LMV981IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
LMV981IDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,411
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Product details
Overview
LMV981IDCKR from Texas Instruments is a single-channel, rail-to-rail input/output operational amplifier optimized for 1.8-V to 5-V low-power portable systems. It delivers 1.4-MHz gain bandwidth, 100-µA supply current per channel, 4-mV max input offset voltage, and rail-to-rail output swing within 80 mV of rails into 600 Ω - enabling high-fidelity signal conditioning in battery-powered energy metering and sensor front-ends.
For engineers reviewing the LMV981IDCKR datasheet, LMV981IDCKR pinout, LMV981IDCKR application, or LMV981IDCKR equivalent, key selection criteria include shutdown-enabled ultra-low quiescent current (0.156 µA), −40°C to 125°C operation, SC-70-6 package footprint, and verified rail-to-rail common-mode input range extending 200 mV beyond supply rails.
Technical Context
The LMV981IDCKR employs a Class AB output stage with internal bias control to sustain rail-to-rail output drive into 600 Ω while maintaining stability with capacitive loads up to 1000 pF. Its input stage uses complementary NPN/PNP differential pairs to achieve 200-mV beyond-rail common-mode range and low input bias current (65 nA typical).
Shutdown functionality is implemented via a dedicated SHDN pin requiring ≥4.2 V (at 5 V supply) or ≥1.9 V (at 2.7 V) to enable; turn-on time is 8.4 µs at 5 V. The device features 71° phase margin and 8-dB gain margin at unity gain with 600-Ω load, ensuring robust small-signal transient response without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5 V - supports direct connection to single Li-ion (3.0–3.6 V), two alkaline (2.4–3.2 V), or regulated 1.8/2.7/3.3/5 V rails. |
| Gain Bandwidth Product | 1.4 MHz - enables stable unity-gain buffer or gain-of-10 amplification up to ~140 kHz in sensor signal chains. |
| Quiescent Current | 100 µA per amplifier - allows continuous operation for >1 year on a 200-mAh coin cell in always-on monitoring applications. |
| Input Offset Voltage | Max 4 mV at 25°C - ensures ≤0.4% full-scale error in 1-V reference-based 10-bit ADC front-ends. |
| Rail-to-Rail Output Swing | Within 80 mV of rails into 600 Ω at 1.8 V - preserves >95% dynamic range in low-voltage analog-to-digital conversion paths. |
| Common-Mode Input Range | VCC− − 0.2 V to VCC+ + 0.2 V - accepts inputs 200 mV below ground or above VCC, simplifying level-shifting in mixed-supply systems. |
| Shutdown Current | 0.156 µA typical at 1.8 V - reduces system standby power to nanoampere levels during sleep cycles. |
Pinout & Package
LMV981IDCKR is housed in a 6-pin SC-70 (DCK) package measuring 2.0 mm × 1.25 mm × 0.9 mm, optimized for space-constrained PCB layouts in portable instrumentation and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | Differential input node accepting signals from sensors or DACs; supports common-mode voltages beyond rails. |
| 2 (IN−) | Inverting input | Feedback node for closed-loop configurations; matched input impedance minimizes offset drift. |
| 3 (VCC−/GND) | Negative supply / ground reference | Single-supply operation: connected to system ground; dual-supply use requires negative rail connection. |
| 4 (VCC+) | Positive supply | Accepts 1.8–5 V; internal regulation ensures consistent biasing across voltage range. |
| 5 (SHDN) | Shutdown control input | Active-high logic: ≥1.0 V (1.8 V supply) enables operation; <0.55 V disables amplifier and cuts ICC to 0.156 µA. |
| 6 (OUT) | Amplifier output | Class AB stage drives 600 Ω loads to within 80 mV of rails; stable with 1000-pF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 1.8-V supply headroom in battery-powered data acquisition, eliminating need for level-shifting circuitry. |
| Ultra-low quiescent current | 100 µA per channel at 1.8 V allows integration into always-on sensor nodes without compromising battery life. |
| Shutdown mode | Reduces supply current to 0.156 µA, supporting duty-cycled operation in energy-harvesting and IoT edge devices. |
| Extended common-mode range | Inputs operate 200 mV beyond supply rails, permitting direct interface with transducers referenced to non-ground potentials. |
| High output drive | Delivers ±80 mA short-circuit current (sourcing/sinking) at 5 V, enabling direct driving of LEDs or small actuators. |
Applications
| Industrial Energy Metering | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Precision current sensing in smart electricity meters using shunt resistors and 16-bit delta-sigma ADCs. IC Role / Device Role / Timing Role: Signal-conditioning amplifier buffering shunt voltage before ADC sampling; provides rail-to-rail swing to maximize SNR. Use Value: 4-mV max VIO and 100-dB CMRR ensure <0.025% measurement error over temperature, meeting IEC 62053-21 Class 0.2 accuracy. |
Use Scenario: Occupancy detection via thermopile or PIR sensor signal amplification in automotive HVAC control modules. IC Role / Device Role / Timing Role: Low-noise (60 nV/√Hz), low-power front-end amplifier operating from 3.3-V vehicle bus with shutdown during ignition-off. Use Value: 0.156-µA shutdown current extends battery backup runtime to >5 years; −40°C to 125°C rating meets AEC-Q100 Grade 1 requirements. |
| Portable Audio Line Drivers | Battery Voltage Monitoring |
|
Use Scenario: Headphone line driver in Bluetooth earbuds powered by 3.7-V Li-ion cells with dynamic voltage scaling. IC Role / Device Role / Timing Role: Unity-gain buffer delivering rail-to-rail output swing into 32-Ω headphones while consuming <100 µA idle current. Use Value: 1.4-MHz GBW and 0.42-V/µs slew rate support 20-kHz audio bandwidth with <0.022% THD+N, preserving fidelity at low supply voltage. |
Use Scenario: Real-time battery voltage tracking in medical wearables using single-cell Li-ion (2.7–4.2 V) with microcontroller ADC. IC Role / Device Role / Timing Role: Precision voltage follower scaling battery voltage to 0–1.8 V for 10-bit MCU ADC input with minimal loading error. Use Value: 65-nA input bias current prevents significant voltage drop across high-value divider resistors (e.g., 1 MΩ), ensuring ±0.5% reading accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001UT-E/OT | Lower GBW (1 MHz), no shutdown pin, 100-µA ICC, same SC-70-6 package. | Lacks active shutdown; unsuitable for duty-cycled battery monitoring where nanoampere standby is required. | Select when shutdown is unnecessary and cost sensitivity outweighs feature parity. |
| TSV911ICT | Higher GBW (8 MHz), 160-µA ICC, rail-to-rail I/O, SC-70-6, but no shutdown function. | Excess bandwidth and current draw reduce efficiency in ultra-low-power sensor nodes. | Prefer for higher-speed signal paths where 1.4-MHz GBW is limiting, accepting higher quiescent power. |
Compared with MCP6001UT-E/OT and TSV911ICT, the LMV981IDCKR uniquely combines shutdown capability, 1.4-MHz bandwidth, and sub-100-µA operation in SC-70 - making it optimal for energy-constrained, intermittently active measurement systems requiring precise low-voltage signal conditioning.
Availability
LMV981IDCKR is available at Aetrix Electronics and suitable for industrial energy metering, automotive cabin sensor interfaces, portable audio line drivers, and battery voltage monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV981IDCKR 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, embedded processing, and connectivity technologies, serving industrial, automotive, and consumer markets with high-reliability components.
The LMV981IDCKR belongs to TI's low-voltage precision op-amp product line, engineered specifically for battery-powered instrumentation, sensor signal conditioning, and portable electronics demanding rail-to-rail performance at sub-1-V supply voltages.
FAQ
What is the maximum supply voltage for LMV981IDCKR?
The absolute maximum supply voltage for LMV981IDCKR is 5.5 V, but the recommended operating range is 1.8 V to 5 V. Operation at 5.5 V exceeds specification limits and may compromise reliability or parametric performance. All electrical characteristics in the datasheet are validated between 1.8 V and 5 V, with optimal rail-to-rail output swing and 1.4-MHz gain bandwidth confirmed across this range. LMV981IDCKR must not be operated continuously above 5.5 V.
Does LMV981IDCKR support true rail-to-rail input at 1.8 V?
Yes, LMV981IDCKR supports true rail-to-rail input at 1.8 V, with a common-mode input voltage range specified from VCC− − 0.2 V to VCC+ + 0.2 V. At 1.8 V supply, this means inputs can extend from −0.2 V to +2.0 V - 200 mV beyond both rails - enabling direct interfacing with transducers whose outputs swing below ground or above VCC. This is verified in the datasheet's VICR specifications under 1.8-V conditions.
What is the typical output swing of LMV981IDCKR into a 600-Ω load at 1.8 V?
At 1.8 V supply and 25°C, LMV981IDCKR delivers a typical output swing of 0.077 V to 1.72 V into a 600-Ω load - i.e., within 77 mV of the lower rail and 80 mV of the upper rail. This rail-to-rail capability is maintained across the full −40°C to 125°C temperature range, with worst-case swing degrading to 0.12 V low and 1.63 V high. These values are measured with VIC = 0.5 V and RL = 600 Ω to 0.9 V, per the SLOS440H datasheet.
How does the shutdown function behave on LMV981IDCKR?
The LMV981IDCKR shutdown pin (SHDN) is active-high: pulling it ≥1.0 V (at 1.8 V supply) enables normal operation, while pulling it <0.55 V disables the amplifier and reduces supply current to 0.156 µA typical. Turn-on time from shutdown is 8.4 µs at 5 V, 12.5 µs at 2.7 V, and 19 µs at 1.8 V. The SHDN pin has no internal pull-up; external logic or microcontroller GPIO must drive it directly.
Is LMV981IDCKR qualified for automotive applications?
Yes, LMV981IDCKR is characterized for operation from −40°C to +125°C and is widely used in automotive cabin sensor modules, including HVAC occupancy detection and battery monitoring. While not AEC-Q200 certified as a discrete passive, its temperature rating, robust ESD protection (2000-V HBM), and proven reliability in TI's automotive-grade process make it suitable for non-safety-critical automotive subsystems. Designers should validate against specific vehicle OEM requirements.
LMV981IDCKR 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:
- 15 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
LMV981IDCKR FAQ
1.How can I place an order for LMV981IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV981IDCKR 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 LMV981IDCKR reliable?
The price and inventory of LMV981IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV981IDCKR is usually 5 days.
3.What payment methods are accepted for LMV981IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV981IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV981IDCKR?
LMV981IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV981IDCKR 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 LMV981IDCKR?
For technical support, including LMV981IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV981IDCKR requirements.
6.How does Aetrix verify that LMV981IDCKR is sourced from the original manufacturer or authorized distributors?
All LMV981IDCKR 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 LMV981IDCKR meets industry standards.
7.What is the process for return or replacement of LMV981IDCKR?
All LMV981IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LMV981IDCKR, 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 LMV981IDCKR part is unused and in its original packaging.
Return procedure for LMV981IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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