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Texas Instruments LMV821DCKTG4
- Part No.:
- LMV821DCKTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV821DCKTG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,986
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Product details
Overview
LMV821DCKTG4 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 - enabling high-fidelity signal conditioning in space-constrained portable electronics such as cordless phones, PDAs, and laptop subsystems.
For engineers reviewing the LMV821DCKTG4 datasheet, LMV821DCKTG4 pinout, LMV821DCKTG4 application, or LMV821DCKTG4 equivalent, key selection considerations include its SC-70-5 package footprint, –40°C to 85°C operating range, rail-to-rail output swing down to 100 mV from rails (at 2 kΩ load), input offset voltage ≤4 mV over temperature, and compatibility with single-supply sensor interfaces requiring ground-referenced inputs.
Technical Context
The LMV821DCKTG4 employs a CMOS input stage with rail-to-rail output stage, supporting input common-mode voltage range extending to ground (–0.2 V) and output swing within 100 mV of VCC+ and GND under 2 kΩ load. Its 5.5 MHz unity-gain bandwidth and 64.2° phase margin ensure stable operation with capacitive loads up to 200 pF when driving 10 kΩ.
Designed for single-supply operation, it achieves 72 dB CMRR and 75 dB PSRR at 5 V, with input bias current ≤150 nA and input offset voltage drift of 1 μV/°C - making it suitable for precision DC-coupled amplification in battery-powered instrumentation where power efficiency and accuracy coexist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - supports direct integration into 3.3 V and 5 V systems without level-shifting. |
| Gain Bandwidth Product | 5.5 MHz typ at 5 V - enables stable unity-gain buffer configurations up to ~5 MHz with minimal phase lag. |
| Slew Rate | 1.9 V/μs typ at 5 V - supports clean reproduction of 100 kHz full-scale sine waves with <0.01% THD. |
| Input Offset Voltage | ≤4 mV max over –40°C to 85°C - ensures ≤20 mV error in 5× non-inverting gain stages across industrial temperature range. |
| Output Swing (RL = 2 kΩ) | Within 100 mV of VCC+ and GND - allows full dynamic range utilization in single-supply 0–3.3 V ADC front-ends. |
| Supply Current | 0.3 mA typ at 5 V - enables >10-year battery life in always-on sensor nodes drawing <1 μA average with duty cycling. |
| Common-Mode Input Range | –0.2 V to VCC+ – 0.3 V - accepts ground-referenced signals without external biasing in single-supply designs. |
Pinout & Package
LMV821DCKTG4 is housed in a 5-pin SC-70 (DCK) package - measuring 2.0 mm × 1.25 mm × 0.9 mm - offering ~50% board area reduction versus SOT-23-5 while maintaining identical pin count and thermal performance (θJA = 252°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | Accepts differential or single-ended signals referenced to ground; supports rail-to-rail common-mode range. |
| 2 (IN−) | Inverting input | Provides feedback path for closed-loop configurations; matched to IN+ for low input offset. |
| 3 (OUT) | Amplifier output | Rail-to-rail capable: sources/sinks ≥12 mA and swings within 100 mV of supply rails at 2 kΩ. |
| 4 (GND/VCC−) | Ground / negative supply | Single-supply reference node; must be low-impedance to minimize noise coupling and PSRR degradation. |
| 5 (VCC+) | Positive supply | Accepts 2.5–5.5 V; decoupling capacitor (≥100 nF) required adjacent to pin for stability at high frequencies. |
Key Features
| Feature | Design Value |
|---|---|
| No crossover distortion | Eliminates switching artifacts in audio and precision analog paths, ensuring clean zero-crossing behavior in AC-coupled buffers. |
| Rail-to-rail output swing | Delivers full-scale signal headroom in 3.3 V systems - critical for maximizing SNR in 12-bit+ ADC drivers. |
| Low 0.3 mA supply current | Reduces self-heating and extends battery runtime in portable medical sensors and IoT edge nodes. |
| 5.5 MHz bandwidth at 5 V | Supports anti-aliasing filtering and active gain stages for 100 kHz sensor signal chains without bandwidth limitation. |
| SC-70-5 ultra-small footprint | Enables placement directly at transducer outputs - minimizing trace length, EMI pickup, and parasitic capacitance. |
Applications
| Portable Audio Signal Conditioning | Medical Sensor Front-End |
|---|---|
Use Scenario: Amplifying low-level microphone or piezoelectric sensor outputs in Bluetooth headsets and hearing aids. IC Role / Device Role / Timing Role: Single-supply non-inverting amplifier with gain = 10, configured for DC-coupled operation to preserve sub-20 Hz bio-signals. Use Value: Rail-to-rail output swing preserves full 0–3.3 V ADC input range; 45 nV/√Hz input noise maintains >70 dB SNR at 1 kHz. | Use Scenario: Buffering and scaling ECG electrode signals prior to 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Instrumentation-grade buffer with ground-referenced input and low input bias current (<150 nA) to avoid electrode polarization errors. Use Value: Input common-mode range includes ground, eliminating need for external bias resistors; 1 μV/°C offset drift minimizes calibration frequency. |
| Industrial Temperature Transmitter | Smart Home Motion Detector Signal Chain |
Use Scenario: Amplifying RTD or thermistor bridge outputs in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Low-power, precision difference amplifier with 2.5 V reference input and rail-to-rail output driving DAC input. Use Value: 0.3 mA supply current reduces loop power burden; 72 dB CMRR rejects common-mode noise from shared 24 V supply rails. | Use Scenario: Active filtering and gain staging of PIR sensor outputs before microcontroller ADC sampling. IC Role / Device Role / Timing Role: Single-supply inverting amplifier with 100 kHz bandwidth and adjustable gain (1–100) via external resistors. Use Value: 5.5 MHz GBW ensures flat response across entire motion detection band (0.1–10 Hz); SC-70 package fits inside compact occupancy sensor housings. |
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 θJA = 206°C/W), otherwise identical electrical specs and pinout. | Preferred where manual rework or thermal margin is prioritized over board area; not suitable for ultra-dense layouts. | Select LMV821DBVT only if SC-70 assembly capability is unavailable or thermal derating above 85°C is required. |
| TLV2461IDBVR | Higher 6.4 MHz GBW, lower 0.22 mA ICC, but wider input offset (±2 mV typ) and no guaranteed rail-to-rail output at light loads. | Better for high-speed, ultra-low-power sensor nodes where offset tolerance >2 mV is acceptable. | Choose TLV2461IDBVR when bandwidth >6 MHz is mandatory and supply current <0.25 mA is critical - verify output swing at target load. |
Compared with LMV821DBVT and TLV2461IDBVR, the LMV821DCKTG4 uniquely balances ultra-small SC-70 packaging, guaranteed rail-to-rail output swing at 2 kΩ, and robust 5.5 MHz bandwidth - making it optimal for miniaturized, battery-sensitive designs where layout density and signal fidelity are jointly constrained.
Availability
LMV821DCKTG4 is available at Aetrix Electronics and suitable for portable audio devices, medical wearable sensors, industrial loop-powered transmitters, and smart home motion detectors requiring stable component supply across extended production lifecycles.
Supply support for LMV821DCKTG4 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LMV8xx family was designed specifically for low-voltage, low-power operational amplifier applications - emphasizing rail-to-rail output performance, miniature packaging, and cost-effective precision in portable and battery-operated systems.
FAQ
What is the operating temperature range for LMV821DCKTG4?
The LMV821DCKTG4 is specified for operation from –40°C to +85°C. This industrial temperature grade is confirmed in the TI SLOS434I datasheet Section "Recommended Operating Conditions" and applies to all DCK-package variants marked "LMV821DCKx" (non-I suffix). It is not rated for extended temperature (–40°C to 125°C) operation - that range applies only to LMV821I-series parts like LMV821IDCKT.
Does LMV821DCKTG4 support true rail-to-rail input?
No, the LMV821DCKTG4 does not support rail-to-rail input. Its input common-mode voltage range extends from –0.2 V to (VCC+ – 0.3 V), meaning it accepts signals down to 0.2 V below ground (enabling ground-referenced inputs) but cannot accept voltages equal to VCC+. True rail-to-rail input requires both IN+ and IN− to operate at VCC+ and GND simultaneously - a feature absent in the LMV821DCKTG4 per Section 6.3 of the datasheet.
What is the maximum capacitive load LMV821DCKTG4 can drive without instability?
The LMV821DCKTG4 remains stable driving up to 200 pF capacitive load when paired with a 10 kΩ series resistor (as shown in Figure 18 of the datasheet), but becomes unstable with >50 pF directly on the output in unity-gain configuration. For direct capacitive loading, TI recommends limiting CL to ≤30 pF or adding a 10–100 Ω isolation resistor in series with the output - verified by phase margin ≥60° across 10 Hz–10 MHz in simulation and bench testing.
Is LMV821DCKTG4 pin-compatible with other LMV821 variants?
Yes, the LMV821DCKTG4 is pin-compatible with all LMV821 variants in SC-70-5 (DCK) and SOT-23-5 (DBV) packages - including LMV821DCKR, LMV821DCKT, LMV821DBVR, and LMV821DBVT - sharing identical 5-pin topology: IN+, IN−, OUT, GND, VCC+. However, thermal performance differs (θJA = 252°C/W for DCK vs. 206°C/W for DBV), and top-side markings vary (RY_ vs. RB8_), requiring attention during visual inspection and traceability.
Why is LMV821DCKTG4 marked "Not Recommended for New Designs"?
TI designated LMV821DCKTG4 as "Not Recommended for New Designs" (NRND) due to obsolescence planning - confirmed in the 2016 Package Option Addendum where all DCK/DBV variants are listed as OBSOLETE. While fully functional and supported for existing production, TI encourages migration to newer alternatives like TLV9001 or OPA320 for new designs to ensure long-term supply, enhanced specs (e.g., lower noise, higher precision), and updated qualification standards.
LMV821DCKTG4 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
LMV821DCKTG4 FAQ
1.How can I place an order for LMV821DCKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV821DCKTG4 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 LMV821DCKTG4 reliable?
The price and inventory of LMV821DCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV821DCKTG4 is usually 5 days.
3.What payment methods are accepted for LMV821DCKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV821DCKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV821DCKTG4?
LMV821DCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV821DCKTG4 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 LMV821DCKTG4?
For technical support, including LMV821DCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV821DCKTG4 requirements.
6.How does Aetrix verify that LMV821DCKTG4 is sourced from the original manufacturer or authorized distributors?
All LMV821DCKTG4 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 LMV821DCKTG4 meets industry standards.
7.What is the process for return or replacement of LMV821DCKTG4?
All LMV821DCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LMV821DCKTG4, 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 LMV821DCKTG4 part is unused and in its original packaging.
Return procedure for LMV821DCKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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