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Texas Instruments LMV821DCKT
- Part No.:
- LMV821DCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV821DCKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,122
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Product details
Overview
LMV821DCKT from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.5 V to 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 precision signal conditioning in space-constrained portable electronics such as cordless phones and PDAs.
For engineers reviewing the LMV821DCKT datasheet, LMV821DCKT pinout, LMV821DCKT application, or LMV821DCKT equivalent, key selection criteria include its SC-70-5 package footprint, input offset voltage ≤4 mV over –40°C to 85°C, rail-to-rail output swing within 100 mV of rails at 2 kΩ load, and guaranteed operation down to 2.5 V supply.
Technical Context
The LMV821DCKT implements a CMOS-input, rail-to-rail output op-amp architecture with no crossover distortion, supporting single-supply operation from 2.5 V to 5.5 V. Its input common-mode range extends to ground (–0.2 V to 4.2 V at 5 V), and it achieves 72 dB minimum CMRR and 75 dB minimum PSRR across temperature.
It features internal compensation for unity-gain stability with capacitive loads up to 22 pF, and maintains ≥64.2° phase margin into 600 Ω loads at 5 V. Amplifier-to-amplifier isolation exceeds 135 dB, confirming suitability for multi-channel systems where crosstalk must be minimized.
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 logic domains without level-shifting. |
| Gain Bandwidth Product | 5.5 MHz typ at 5 V - enables stable closed-loop operation up to ~500 kHz with gain = 10. |
| Slew Rate | 1.9 V/μs typ at 5 V - sufficient for 100-kHz full-scale sine waves up to 19 Vpp without distortion. |
| Input Offset Voltage | ≤4 mV max over –40°C to 85°C - ensures <±10 mV error in unity-gain buffer configurations at room and extended temperature. |
| Output Swing | Within 100 mV of rails at 2 kΩ load - delivers true rail-to-rail performance for ADC driver and sensor interface applications. |
| Supply Current | 0.3 mA typ at 5 V - allows battery-powered designs to achieve >1-year runtime on coin cells in duty-cycled sensing nodes. |
| Common-Mode Input Range | –0.2 V to 4.2 V at 5 V - accepts signals referenced to ground, including 0–3.3 V sensor outputs. |
Pinout & Package
LMV821DCKT is housed in the SC-70-5 (DCK) package - a 2.0 mm × 1.25 mm surface-mount outline with 0.65 mm pitch, optimized for high-density PCB layouts in portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | Accepts analog input signals; supports common-mode voltages down to ground. |
| 2 (IN−) | Inverting input | Provides feedback path; matched input bias current minimizes offset drift. |
| 3 (OUT) | Amplifier output | Delivers rail-to-rail swing into ≥2 kΩ loads; capable of sourcing/sinking ≥12 mA. |
| 4 (GND/VCC−) | Ground / negative supply | Single-supply reference node; ties to system ground in unipolar configurations. |
| 5 (VCC+) | Positive supply | Accepts 2.5–5.5 V; decoupling capacitor required within 1 cm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No crossover distortion | Eliminates switching artifacts in audio and precision DC-coupled paths, preserving signal fidelity at low amplitudes. |
| Rail-to-rail output | Maximizes dynamic range when driving SAR ADCs or interfacing with 3.3 V logic, reducing need for external level-shifting. |
| Low 0.3 mA supply current | Enables always-on sensor front-ends in IoT edge nodes without compromising battery life or thermal budget. |
| 5.5 MHz GBW at 5 V | Supports active filtering (e.g., 2nd-order anti-aliasing) with <1% gain error up to 100 kHz. |
| SC-70-5 ultra-small footprint | Reduces board area by ~50% vs. SOT-23-5, easing placement near sensors to minimize EMI pickup. |
Applications
| Portable Sensor Interface | Low-Power ADC Driver |
|---|---|
Use Scenario: Amplifying output of MEMS accelerometers or thermistors in battery-powered wearables. IC Role / Device Role / Timing Role: Precision DC-coupled non-inverting amplifier with gain = 10, rejecting supply noise via 75 dB PSRR. Use Value: Delivers 16-bit-equivalent SNR by limiting input-referred noise to 42 nV/√Hz and maintaining offset drift <1 μV/°C. | Use Scenario: Driving the input of a 12-bit SAR ADC in an energy-harvesting environmental monitor. IC Role / Device Role / Timing Role: Unity-gain buffer isolating high-impedance sensor from ADC sample capacitor kickback. Use Value: Rail-to-rail swing ensures full ADC code utilization; 1.9 V/μs slew rate settles 12-bit codes in <1.5 μs. |
| Mobile Audio Line Driver | Industrial 4–20 mA Loop Receiver |
Use Scenario: Buffering DAC output to headphone jack or line-out in Bluetooth headsets. IC Role / Device Role / Timing Role: Low-distortion voltage follower with THD = 0.01% at 1 kHz, powered from 3.3 V LDO. Use Value: No crossover distortion preserves audio clarity; 0.3 mA quiescent current extends talk time per charge cycle. | Use Scenario: Converting 4–20 mA loop current to 0–5 V signal for microcontroller ADC in factory automation modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with 250 Ω feedback resistor, operating from 5 V supply. Use Value: Input common-mode range includes ground, enabling direct connection to shunt resistor; 5.5 MHz GBW ensures fast step response to current transients. |
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 (2.92 mm × 1.6 mm); identical electrical specs and temperature range (–40°C to 85°C). | Less board-area efficient than DCK; preferred only when legacy layout compatibility or hand-soldering is required. | Select LMV821DBVT if existing PCB footprints or assembly processes are optimized for SOT-23. |
| TLV2461IDBVR | Higher supply current (0.65 mA typ), lower GBW (6.4 MHz), wider offset range (±2 mV max), same SC-70-5 package. | Better DC precision but higher power; suited for ultra-low-noise sensor front-ends where speed is secondary. | Choose TLV2461IDBVR when input offset voltage <2 mV and noise <22 nV/√Hz are mandatory, and 0.35 mA extra supply current is acceptable. |
Compared with LMV821DBVT, LMV821DCKT saves 50% PCB area while maintaining identical performance; versus TLV2461IDBVR, LMV821DCKT trades 0.35 mA lower supply current for slightly higher input-referred noise, making it optimal for area- and power-constrained portable systems.
Availability
LMV821DCKT is available at Aetrix Electronics and suitable for portable sensor interfaces, low-power ADC drivers, mobile audio line drivers, and industrial 4–20 mA loop receivers requiring stable component supply across extended product lifecycles.
Supply support for LMV821DCKT 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 for industrial, automotive, and personal electronics markets.
The LMV8xx family was designed specifically for cost-sensitive, space-constrained, low-voltage applications - emphasizing rail-to-rail output, low quiescent current, and robust AC performance in sub-2-mm packages like SC-70.
FAQ
What is the operating temperature range for LMV821DCKT?
The LMV821DCKT is rated for operation from –40°C to +85°C. This commercial-grade temperature specification is confirmed in the official TI datasheet SLOS434I, and applies to all LMV821 variants in the DCK and DBV packages without the "I" suffix. The device's electrical characteristics - including input offset voltage, supply current, and output swing - are guaranteed across this full range.
Does LMV821DCKT support rail-to-rail input?
No, LMV821DCKT does not support rail-to-rail input. Its input common-mode voltage range is specified as –0.2 V to 4.2 V at VCC+ = 5 V, meaning the inputs operate down to 0.2 V below ground but only up to 0.3 V below VCC+. While the output is rail-to-rail, the input stage is ground-sensing but not VCC-sensing - a key distinction confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the LMV821 datasheet.
What is the maximum capacitive load LMV821DCKT can drive stably?
LMV821DCKT is internally compensated for unity-gain stability with capacitive loads up to 22 pF, as verified in the Gain and Phase Margin vs. Frequency plots (Figures 16–21) of the datasheet. Driving larger capacitive loads (e.g., >100 pF) requires external isolation resistance (≥100 Ω) in series with the output to maintain ≥45° phase margin and prevent peaking or oscillation.
Is LMV821DCKT pin-compatible with other LMV8xx variants?
LMV821DCKT is not pin-compatible with LMV822 or LMV824, as those are dual- and quad-channel devices with different pin counts and arrangements. However, among LMV821 variants, LMV821DCKT (SC-70-5) shares identical pinout with LMV821DBVT (SOT-23-5) - both use the standard 5-pin op-amp configuration: IN+, IN−, OUT, GND, VCC+. This allows direct substitution when package conversion is acceptable.
Why is LMV821DCKT marked 'Not Recommended for New Designs'?
TI designated LMV821DCKT as "Not Recommended for New Designs" due to obsolescence status - confirmed in TI's 2016 Packaging Option Addendum, where LMV821DCKT is listed as OBSOLETE. This reflects end-of-life planning, not performance deficiency. For new designs, TI recommends the TLV9001 (single, SC-70-5) or OPA316 (higher precision), both offering improved specs and active supply support.
LMV821DCKT 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
LMV821DCKT FAQ
1.How can I place an order for LMV821DCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV821DCKT 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 LMV821DCKT reliable?
The price and inventory of LMV821DCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV821DCKT is usually 5 days.
3.What payment methods are accepted for LMV821DCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV821DCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV821DCKT?
LMV821DCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV821DCKT 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 LMV821DCKT?
For technical support, including LMV821DCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV821DCKT requirements.
6.How does Aetrix verify that LMV821DCKT is sourced from the original manufacturer or authorized distributors?
All LMV821DCKT 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 LMV821DCKT meets industry standards.
7.What is the process for return or replacement of LMV821DCKT?
All LMV821DCKT units undergo pre-shipment inspection (PSI). If there is an issue with LMV821DCKT, 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 LMV821DCKT part is unused and in its original packaging.
Return procedure for LMV821DCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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