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Texas Instruments LMV821DBVTG4
- Part No.:
- LMV821DBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV821DBVTG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,734
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Product details
Overview
LMV821DBVTG4 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 0.4 mA typical supply current at 5 V, operating across –40°C to 85°C. It serves signal conditioning in portable sensor interfaces and battery-powered analog front-ends.
For engineers reviewing the LMV821DBVTG4 datasheet, LMV821DBVTG4 pinout, LMV821DBVTG4 application, or LMV821DBVTG4 equivalent, key selection criteria include rail-to-rail output swing (4.85 V at 5 V supply), input common-mode range extending to ground, low input offset voltage (≤3.5 mV), and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LMV821DBVTG4 implements a CMOS input stage with rail-to-rail output stage, enabling full-swing operation into high-impedance loads while maintaining low crossover distortion. Its 5.5 MHz unity-gain bandwidth and 64.2° phase margin ensure stable closed-loop performance with capacitive loads up to 22 pF.
Designed for single-supply operation, it supports input common-mode voltage from –0.2 V to 4.3 V (at 5 V supply) and delivers ±20 mA output drive capability. The device exhibits 42 nV/√Hz input voltage noise and 0.2 pA/√Hz input current noise at 1 kHz, making it suitable for precision DC-coupled amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V - enables direct interface with Li-ion, 3.3 V, and 5 V logic rails without level shifting |
| Gain Bandwidth | 5.5 MHz typ at 5 V - supports stable unity-gain buffer and closed-loop configurations up to ~100 kHz |
| Slew Rate | 1.9 V/μs typ at 5 V - allows faithful reproduction of signals with ≤1 MHz full-power bandwidth |
| Input Offset Voltage | ≤3.5 mV max - ensures ≤0.07% error in 5 V full-scale 12-bit ADC driver applications |
| Output Swing | 0.1 V from rail (sinking) / 0.15 V from rail (sourcing) at 2 kΩ load - achieves >97% of supply range for maximum dynamic range |
| Supply Current | 0.4 mA typ at 5 V - supports >10-year battery life in always-on sensor nodes drawing <1 μA average |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
SOT-23-5 package (DBV): 2.9 mm × 1.6 mm × 1.15 mm body, gull-wing leads, JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; drives loads ≥2 kΩ directly without external buffering |
| 2 (IN−) | Inverting input | High-impedance CMOS node; accepts common-mode voltages down to –0.2 V (beyond ground) |
| 3 (GND/VCC−) | Ground / negative supply | Single-supply reference node; must be low-impedance path to minimize PSRR degradation |
| 4 (IN+) | Non-inverting input | High-impedance CMOS node; matched bias current to IN− for low offset drift |
| 5 (VCC+) | Positive supply | Accepts 2.5–5.5 V; internal regulation ensures consistent GBW and SR across voltage range |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 100 mV of supply rails at 2 kΩ load - preserves full ADC input range in 3.3 V systems |
| No crossover distortion | CMOS output stage eliminates Class AB dead-zone artifacts - critical for audio and precision DC signal paths |
| Low input bias current | ≤30 nA max - minimizes voltage error across high-value feedback resistors (>1 MΩ) |
| Wide input common-mode range | Extends 0.2 V below GND and to 4.3 V at 5 V supply - enables direct sensing of bipolar transducer outputs |
| Stable with capacitive loads | Phase margin ≥64.2° with 22 pF CL - permits direct driving of ADC input capacitors without isolation resistor |
Applications
| Portable Sensor Interface | Battery-Powered Data Logger |
|---|---|
Use Scenario: Amplifying low-level output from MEMS accelerometers or thermistors in handheld IoT devices. IC Role / Device Role / Timing Role: Signal-conditioning op-amp providing gain, filtering, and rail-to-rail buffering before 12-bit SAR ADC sampling. Use Value: 0.4 mA supply current extends coin-cell battery life beyond 5 years; rail-to-rail output maximizes ADC utilization. | Use Scenario: Conditioning analog outputs from environmental sensors (temperature/humidity) in remote field monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier driving multiplexed ADC inputs in intermittent-sampling architecture. Use Value: Input offset ≤3.5 mV ensures <±0.5°C temperature accuracy; wide common-mode range accommodates sensor biasing schemes. |
| Industrial Control Loop | Medical Wearable Front-End |
Use Scenario: Isolating and scaling 4–20 mA loop signals in PLC analog input modules. IC Role / Device Role / Timing Role: Precision current-to-voltage converter and buffer in isolated signal chain. Use Value: 42 nV/√Hz input noise maintains SNR >80 dB over 10 Hz–10 kHz; 5.5 MHz GBW supports fast transient response. | Use Scenario: Amplifying ECG electrode signals in ultra-low-power wearable patches. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with high CMRR and low power. Use Value: 75 dB min CMRR rejects 50/60 Hz interference; 0.2 pA/√Hz input current noise prevents electrode polarization errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321DBVR | Lower GBW (1 MHz), higher supply current (0.85 mA), same SOT-23-5 package | Targeted at cost-sensitive, lower-bandwidth applications where 5.5 MHz is unnecessary | Select when design prioritizes lowest BOM cost over speed/power trade-off |
| TLV9001IDBVR | Higher precision (0.3 mV VIO), lower noise (30 nV/√Hz), same supply range and package | Preferred for high-accuracy sensor signal chains requiring sub-12-bit linearity | Select when offset drift and noise dominate system error budget over bandwidth |
Compared with LMV321DBVR, LMV821DBVTG4 provides 5.5× higher bandwidth and 53% lower supply current; compared with TLV9001IDBVR, it trades 0.3 mV offset and 12 nV/√Hz noise reduction for 2.2× higher slew rate and broader industrial temperature support.
Availability
LMV821DBVTG4 is available at Aetrix Electronics and suitable for portable sensor interfaces, battery-powered data loggers, and industrial control loops requiring stable component supply across extended product lifecycles.
Supply support for LMV821DBVTG4 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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LMV8xx family was designed as low-voltage, rail-to-rail output op-amps targeting space-constrained, battery-operated systems needing higher bandwidth than legacy LMV3xx devices.
FAQ
What is the operating temperature range for LMV821DBVTG4?
The LMV821DBVTG4 is specified for operation from –40°C to +85°C. This industrial-grade temperature range ensures reliable performance in embedded systems deployed in uncontrolled ambient environments, including factory automation controllers and outdoor sensor nodes. The device's electrical characteristics-including gain bandwidth, slew rate, and input offset-are guaranteed across this full range per the TI SLOS434I datasheet revision July 2006.
Does LMV821DBVTG4 support rail-to-rail input?
No, LMV821DBVTG4 does not support rail-to-rail input. Its input common-mode voltage range extends from –0.2 V to 4.3 V at 5 V supply (i.e., 0.2 V below ground and 0.7 V below VCC+). While the output is rail-to-rail, the input stage requires at least 0.2 V headroom below GND and 0.7 V headroom below VCC+ for proper operation. This allows ground-referenced sensor interfacing but excludes true input swing to the positive rail.
What is the maximum capacitive load LMV821DBVTG4 can drive stably?
The LMV821DBVTG4 maintains stability with capacitive loads up to 22 pF, as confirmed by phase margin measurements of ≥64.2° under 5 V supply and 22 pF load conditions. Driving larger capacitive loads-such as ADC input capacitances exceeding 22 pF-requires an isolation resistor (typically 10–100 Ω) between the LMV821DBVTG4 output and the load to preserve phase margin and prevent peaking or oscillation.
Is LMV821DBVTG4 pin-compatible with other SOT-23-5 op-amps?
LMV821DBVTG4 uses the standard SOT-23-5 pinout (OUT, IN−, GND, IN+, VCC+) and is mechanically compatible with other SOT-23-5 op-amps. However, electrical behavior-including bandwidth, noise, and supply current-differs significantly from alternatives like LMV321 or TLV9001. Pin compatibility does not guarantee functional interchangeability; circuit revalidation is required when substituting.
Why is LMV821DBVTG4 marked "Not Recommended for New Designs"?
LMV821DBVTG4 is marked "Not Recommended for New Designs" because Texas Instruments has superseded it with newer-generation amplifiers such as the TLV9001 and OPA320 families, which offer improved offset, noise, and power efficiency. While LMV821DBVTG4 remains fully functional and supported for existing designs, TI advises new projects to adopt these enhanced alternatives to benefit from extended lifetime availability and superior specifications.
LMV821DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- SOT-23-5
LMV821DBVTG4 FAQ
1.How can I place an order for LMV821DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV821DBVTG4 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 LMV821DBVTG4 reliable?
The price and inventory of LMV821DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV821DBVTG4 is usually 5 days.
3.What payment methods are accepted for LMV821DBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV821DBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV821DBVTG4?
LMV821DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV821DBVTG4 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 LMV821DBVTG4?
For technical support, including LMV821DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV821DBVTG4 requirements.
6.How does Aetrix verify that LMV821DBVTG4 is sourced from the original manufacturer or authorized distributors?
All LMV821DBVTG4 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 LMV821DBVTG4 meets industry standards.
7.What is the process for return or replacement of LMV821DBVTG4?
All LMV821DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with LMV821DBVTG4, 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 LMV821DBVTG4 part is unused and in its original packaging.
Return procedure for LMV821DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV821DBVTG4 Tags
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LM358DR
Texas Instruments
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