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Texas Instruments LMV821DCKTE4
- Part No.:
- LMV821DCKTE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV821DCKTE4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,926
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Product details
Overview
LMV821DCKTE4 from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.5 V to 5.5 V), low-power applications. It delivers 5.5 MHz gain bandwidth, 1.9 V/μs slew rate, and 0.3 mA typical supply current at 5 V, operating across –40°C to 85°C. It serves as a precision signal conditioner in portable sensor interfaces and battery-powered analog front-ends.
For engineers reviewing the LMV821DCKTE4 datasheet, LMV821DCKTE4 pinout, LMV821DCKTE4 application, or LMV821DCKTE4 equivalent, key selection criteria include its SC-70-5 package footprint, input offset voltage ≤4 mV over temperature, rail-to-rail output swing within 100 mV of rails at 2 kΩ load, and compatibility with space-constrained, single-supply systems requiring low quiescent current.
Technical Context
The LMV821DCKTE4 employs a CMOS input stage enabling rail-to-rail input common-mode range down to ground and rail-to-rail output swing. Its internal architecture supports stable unity-gain operation with 64.2° phase margin at 5 V and 600 Ω load, and achieves 135 dB amplifier-to-amplifier isolation in multi-channel systems.
It operates from a single 2.5–5.5 V supply, with input bias current ≤150 nA and input offset voltage drift of 1 μV/°C. The device features no crossover distortion and maintains ≥70 dB PSRR and CMRR across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - Enables direct integration into Li-ion, coin-cell, and 3.3 V logic-supplied systems without level-shifting. |
| Gain Bandwidth Product | 5.5 MHz typ at 5 V - Supports closed-loop amplification up to ~500 kHz with gain = 10 while maintaining phase margin >60°. |
| Slew Rate | 1.9 V/μs typ at 5 V - Allows faithful reproduction of signals up to ~300 kHz at 1 VPP without slew-induced distortion. |
| Input Offset Voltage | ≤4 mV max (–40°C to 85°C) - Ensures <±10 mV error in DC-coupled sensor amplification with 10× gain. |
| Output Swing | Within 100 mV of rails (2 kΩ load, 5 V supply) - Delivers full dynamic range in single-supply ADC driver stages. |
| Supply Current | 0.3 mA typ at 5 V - Enables >10-year battery life in always-on sensor nodes powered by CR2032 cells. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial ambient environments including automotive cabin and factory-floor applications. |
Pinout & Package
LMV821DCKTE4 is housed in a 5-pin SC-70 (DCK) package - ultra-small surface-mount outline measuring 2.0 mm × 1.25 mm × 0.9 mm - designed for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | Accepts input signals referenced to ground; supports common-mode range from V– (GND) to V+ – 0.3 V. |
| 2 (IN−) | Inverting input | Provides feedback path; matched input impedance enables precision differential or instrumentation configurations. |
| 3 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; capable of sourcing/sinking ≥20 mA into 600 Ω loads at 5 V. |
| 4 (GND/VCC−) | Ground / negative supply | Single-supply reference node; must be low-impedance to minimize noise coupling and ensure PSRR performance. |
| 5 (VCC+) | Positive supply | Accepts 2.5–5.5 V; decoupling capacitor (0.1 μF) required within 2 mm for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| No crossover distortion | Eliminates switching artifacts in audio and precision DC signal paths, ensuring clean zero-crossing behavior. |
| Rail-to-rail output swing | Maximizes usable dynamic range in single-supply systems-e.g., drives SAR ADCs directly without level-shifting circuitry. |
| Low 0.3 mA supply current | Reduces thermal load and extends battery runtime in always-on wearable health monitors and IoT edge sensors. |
| 5.5 MHz GBW at 5 V | Enables stable gain-of-10 amplification of 50 kHz sensor signals (e.g., piezoelectric vibration sensors) with <1% gain error. |
| SC-70-5 package | Occupies ~50% less board area than SOT-23-5, facilitating placement adjacent to compact transducers to minimize EMI pickup. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Amplifying low-level signals from ECG electrodes in handheld patient monitors. IC Role / Device Role / Timing Role: Precision DC-coupled signal conditioner with rail-to-rail output driving 12-bit SAR ADC inputs. Use Value: 0.3 mA supply current extends battery life beyond 72 hours; rail-to-rail swing ensures full utilization of ADC's 0–3.3 V input range. | Use Scenario: Conditioning 4–20 mA loop transmitter outputs in modular PLC I/O modules. IC Role / Device Role / Timing Role: Low-drift buffer isolating current-sense resistor voltage before digitization. Use Value: ≤4 mV input offset voltage limits measurement error to <±0.1% FS; 5.5 MHz GBW supports fast step-response diagnostics. |
| Wireless Sensor Nodes | Automotive Cabin Electronics |
Use Scenario: Amplifying thermistor or RTD bridge outputs in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Low-power, precision op-amp in ratiometric measurement circuits with microcontroller ADCs. Use Value: 1 μV/°C offset drift minimizes temperature-induced calibration drift; SC-70 package enables co-location with sensing elements. | Use Scenario: Signal conditioning for capacitive touch buttons in infotainment control panels. IC Role / Device Role / Timing Role: High-speed buffer driving touch controller inputs with minimal propagation delay. Use Value: 1.9 V/μs slew rate ensures sub-microsecond response to rapid capacitance changes; 85°C rating covers under-dash thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV821DBVT | SOT-23-5 package (larger footprint, higher thermal resistance: θJA = 206°C/W vs. DCK's 252°C/W); identical electrical specs. | Better suited for prototyping or manual assembly due to larger pad pitch; less optimal for ultra-dense layouts. | Select LMV821DBVT only when SC-70 reflow capability is unavailable or thermal dissipation >100 mW is required. |
| TLV2461CDBVR | Lower 500 kHz GBW, higher 0.65 mA supply current, but tighter 1.5 mV max VIO and extended –40°C to 125°C grade. | Preferred for high-precision, high-temp environments where bandwidth demand is <100 kHz and offset voltage is critical. | Choose TLV2461CDBVR when offset voltage <1.5 mV is mandatory and operating temperature exceeds 85°C. |
Compared with LMV821DBVT and TLV2461CDBVR, LMV821DCKTE4 uniquely balances ultra-small size, 5.5 MHz bandwidth, and 0.3 mA quiescent current-making it optimal for miniaturized, battery-sensitive designs where layout density and speed are jointly constrained.
Availability
LMV821DCKTE4 is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, and wireless sensor nodes requiring stable component supply and long-term design continuity.
Supply support for LMV821DCKTE4 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 delivering analog and embedded processing solutions with broad portfolio coverage and deep application expertise.
The LMV8xx family was engineered for cost-effective, low-voltage, low-power signal conditioning in space-constrained consumer and industrial systems-prioritizing rail-to-rail operation, low quiescent current, and SC-70 packaging.
FAQ
What is the maximum operating supply voltage for LMV821DCKTE4?
The absolute maximum supply voltage for LMV821DCKTE4 is 5.5 V. Operation above this risks permanent damage. The recommended operating range is 2.5 V to 5.5 V, with full electrical specifications guaranteed across that span at temperatures from –40°C to +85°C. Exceeding 5.5 V violates Absolute Maximum Ratings and may compromise reliability.
Does LMV821DCKTE4 support rail-to-rail input common-mode range?
LMV821DCKTE4 supports rail-to-rail output swing but not rail-to-rail input. Its input common-mode voltage range extends from V– (GND) to V+ – 0.3 V at 25°C, per the datasheet's VICR specification. This allows ground-referenced inputs but excludes signals at the positive rail. For true rail-to-rail input, consider TI's TLV2461 or OPA333 families.
What is the thermal resistance (θJA) of the SC-70 package used by LMV821DCKTE4?
The junction-to-ambient thermal resistance (θJA) for LMV821DCKTE4 in the SC-70 (DCK) package is 252°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions (1 in² copper). Actual thermal performance depends on PCB layout, copper area, and airflow; adding thermal vias under the exposed pad (if present) is not applicable-the DCK package has no thermal pad.
Is LMV821DCKTE4 suitable for driving ADC inputs directly?
Yes, LMV821DCKTE4 is well-suited for driving SAR and delta-sigma ADC inputs. Its rail-to-rail output swing (within 100 mV of rails at 2 kΩ), low 0.3 mA supply current, and 5.5 MHz GBW enable low-noise, low-power buffering of sensor signals into 12–16 bit converters. Ensure proper output RC filtering and layout isolation to maintain SNR, especially at sampling rates >100 kSPS.
Why is LMV821DCKTE4 marked "Not Recommended for New Designs"?
LMV821DCKTE4 is marked "Not Recommended for New Designs" because Texas Instruments has superseded it with newer-generation amplifiers such as the TLV9001 (lower power, enhanced EMI immunity) and OPA316 (higher precision, lower noise). While LMV821DCKTE4 remains fully functional and supported for existing designs, TI advises new projects to evaluate these alternatives for improved performance, longevity, and manufacturing support.
LMV821DCKTE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.9V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 40 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 300µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LMV821DCKTE4 FAQ
1.How can I place an order for LMV821DCKTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV821DCKTE4 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 LMV821DCKTE4 reliable?
The price and inventory of LMV821DCKTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV821DCKTE4 is usually 5 days.
3.What payment methods are accepted for LMV821DCKTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV821DCKTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV821DCKTE4?
LMV821DCKTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV821DCKTE4 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 LMV821DCKTE4?
For technical support, including LMV821DCKTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV821DCKTE4 requirements.
6.How does Aetrix verify that LMV821DCKTE4 is sourced from the original manufacturer or authorized distributors?
All LMV821DCKTE4 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 LMV821DCKTE4 meets industry standards.
7.What is the process for return or replacement of LMV821DCKTE4?
All LMV821DCKTE4 units undergo pre-shipment inspection (PSI). If there is an issue with LMV821DCKTE4, 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 LMV821DCKTE4 part is unused and in its original packaging.
Return procedure for LMV821DCKTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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