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Texas Instruments LMV821DCKR
- Part No.:
- LMV821DCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV821DCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,681
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Product details
Overview
LMV821DCKR 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 supply current at 5 V, operating across –40°C to 85°C. It serves as a precision signal-conditioning amplifier in portable sensor interfaces and battery-powered analog front-ends.
For engineers reviewing the LMV821DCKR datasheet, LMV821DCKR pinout, LMV821DCKR application, or LMV821DCKR equivalent, key selection criteria include its SC-70-5 package size, rail-to-rail output swing (4.85 V at 5 V supply), input offset voltage (≤4 mV over temperature), and compatibility with space-constrained, low-noise signal chains in consumer and industrial edge devices.
Technical Context
The LMV821DCKR implements a CMOS-input, rail-to-rail output op-amp architecture with no crossover distortion, enabling clean small-signal amplification near supply rails. Its input common-mode range includes ground, supporting single-supply operation with inputs referenced to 0 V.
It achieves stable unity-gain operation with 64.2° phase margin at 5 V and 600 Ω load, and maintains ≥135 dB amplifier-to-amplifier isolation-critical in multi-channel systems where crosstalk must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V - supports direct integration into 3.3 V and 5 V logic domains without level-shifting. |
| Gain Bandwidth | 5.5 MHz typ at 5 V - enables stable closed-loop gain up to ~55 at 100 kHz for sensor signal amplification. |
| Slew Rate | 1.9 V/μs typ at 5 V - supports 100-kHz full-power bandwidth for 1-VPP signals without distortion. |
| Output Swing | 0.1 V from rail (sinking) / 0.15 V from rail (sourcing) at 2 kΩ load and 5 V supply - maximizes dynamic range in single-supply data acquisition. |
| Input Offset Voltage | ≤4 mV over –40°C to 85°C - ensures ≤0.8% gain error in 100-mV full-scale sensor outputs without trimming. |
| Supply Current | 0.3 mA typ at 5 V - allows continuous operation for >1 year on a 200-mAh coin cell in always-on monitoring nodes. |
| Input Bias Current | ≤150 nA over temperature - minimizes voltage error across high-impedance pH or photodiode sources. |
Pinout & Package
LMV821DCKR is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm, 0.65 mm pitch - designed for ultra-compact PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | Accepts reference or sensor signal; common-mode range extends to GND for single-supply biasing. |
| 2 (IN−) | Inverting input | Connects to feedback network; matched input impedance minimizes offset drift due to bias current mismatch. |
| 3 (OUT) | Amplifier output | Rail-to-rail capable: drives ADC inputs or low-side current-sense resistors directly without external level shift. |
| 4 (GND/VCC−) | Ground / negative supply | Single-supply operation: tied to system GND; no separate negative rail required. |
| 5 (VCC+) | Positive supply | Accepts 2.5–5.5 V; internal ESD protection rated per IEC 61000-4-2 Level 2 (±2 kV contact). |
Key Features
| Feature | Design Value |
|---|---|
| No crossover distortion | Eliminates 2nd-harmonic artifacts in audio and precision DC-coupled signal paths, preserving waveform fidelity. |
| Rail-to-rail output | Delivers >97% of full supply voltage swing, maximizing SNR when driving SAR ADCs with 0–VCC input ranges. |
| Low 0.3 mA supply current | Reduces thermal load in dense layouts and extends battery life in wearables and IoT endpoints without sacrificing bandwidth. |
| SC-70-5 package | Occupies 50% less board area than SOT-23-5, enabling placement adjacent to sensors to minimize trace-induced noise pickup. |
| –40°C to 85°C operation | Validated for use in automotive cabin modules, industrial HMI panels, and outdoor environmental monitors. |
Applications
| Portable Medical Sensors | Industrial Current Monitoring |
|---|---|
Use Scenario: Amplifying microvolt-level ECG electrode signals in handheld patient monitors. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier stage with gain = 100, rejecting common-mode interference. Use Value: Input bias current ≤150 nA prevents electrode polarization; rail-to-rail output fully utilizes 12-bit ADC's 0–3.3 V input range. | Use Scenario: Conditioning shunt voltage in 4–20 mA loop-powered field transmitters. IC Role / Device Role / Timing Role: Low-drift, low-power difference amplifier with fixed gain for current-to-voltage conversion. Use Value: 4 mV max input offset contributes <0.12% error at 3.3 V full scale; 0.3 mA ICC enables loop compliance under 4 mA minimum. |
| Smartphone Ambient Light Sensing | Automotive Cabin Temperature Interface |
Use Scenario: Amplifying photodiode current in ambient light sensor modules with 1.8 V I/O domain. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 MΩ feedback resistor, powered from 2.5 V LDO. Use Value: CMOS input avoids loading high-impedance photodiode; 5.5 MHz GBW supports fast response to lighting changes. | Use Scenario: Buffering thermistor voltage divider outputs in HVAC control units. IC Role / Device Role / Timing Role: Unity-gain buffer isolating high-impedance divider from microcontroller ADC input. Use Value: Rail-to-rail output ensures accurate 0–5 V representation of 0–100°C range; –40°C to 85°C rating matches under-dash environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVR | Lower bandwidth (1 MHz), higher supply current (0.85 mA), same SC-70-5 package and rail-to-rail output. | Targeted at cost-sensitive, lower-speed applications like simple comparators or slow-settling filters. | Select when bandwidth <2 MHz suffices and power budget allows +180% ICC increase. |
| TLV9001IDCKR | Higher precision (0.3 mV VIO max), lower noise (30 nV/√Hz), same 5-pin SC-70 and 5.5 V supply range. | Designed for high-resolution sensor interfaces requiring <0.01% gain error and sub-16-bit ENOB. | Select when offset and noise dominate system error budget, and 1.2 mA ICC is acceptable. |
Compared with LMV321IDBVR, LMV821DCKR provides 4.5× more bandwidth and 65% lower supply current; compared with TLV9001IDCKR, it trades 10× higher offset and 1.4× higher noise for 60% lower ICC and broader legacy design support.
Availability
LMV821DCKR is available at Aetrix Electronics and suitable for portable medical sensors, industrial current monitoring, and smartphone ambient light sensing requiring stable component supply across extended product lifecycles.
Supply support for LMV821DCKR 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 ICs, embedded processors, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LMV8xx family was engineered as a low-voltage, low-power op-amp series targeting space-constrained, battery-operated applications where rail-to-rail output swing and minimal quiescent current are critical.
FAQ
What is the maximum operating supply voltage for LMV821DCKR?
The absolute maximum supply voltage for LMV821DCKR is 5.5 V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks permanent damage. The recommended operating range is 2.5 V to 5 V, where all electrical characteristics-including gain bandwidth, slew rate, and output swing-are guaranteed across temperature.
Does LMV821DCKR support true rail-to-rail input?
No, LMV821DCKR does not support rail-to-rail input. Its input common-mode voltage range extends from VCC− (GND) to VCC+ − 0.3 V at 25°C, meaning the maximum allowable input voltage is typically 4.7 V at 5 V supply. However, it does provide rail-to-rail output swing, reaching within 100 mV of both supply rails under 2 kΩ load.
Is LMV821DCKR suitable for driving ADC inputs directly?
Yes, LMV821DCKR is well-suited for direct ADC driving in single-supply systems. Its rail-to-rail output delivers 0.1 V to 4.9 V swing at 5 V supply, fully covering typical 0–VCC ADC input ranges. Its 5.5 MHz bandwidth and 1.9 V/μs slew rate support settling to 12-bit accuracy within 1 μs for moderate-gain configurations.
What is the thermal resistance (θJA) of the LMV821DCKR SC-70 package?
The junction-to-ambient thermal resistance (θJA) for the LMV821DCKR in the SC-70 (DCK) package is 252°C/W, as documented in the Absolute Maximum Ratings section. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with added copper pour or thermal vias beneath the exposed pad (if present) - though the DCK package has no thermal pad.
Why is LMV821DCKR marked "Not Recommended for New Designs"?
TI designated LMV821DCKR as "Not Recommended for New Designs" due to the introduction of newer, higher-performance alternatives like the TLV9001 series, which offer lower offset, lower noise, and improved CMRR while maintaining SC-70 packaging and supply compatibility. LMV821DCKR remains fully functional and supported for existing designs and legacy production, but TI encourages new designs to evaluate successors for enhanced accuracy and long-term supply assurance.
LMV821DCKR 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:
- 45 mA
- 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
LMV821DCKR FAQ
1.How can I place an order for LMV821DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV821DCKR 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 LMV821DCKR reliable?
The price and inventory of LMV821DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV821DCKR is usually 5 days.
3.What payment methods are accepted for LMV821DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV821DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV821DCKR?
LMV821DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV821DCKR 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 LMV821DCKR?
For technical support, including LMV821DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV821DCKR requirements.
6.How does Aetrix verify that LMV821DCKR is sourced from the original manufacturer or authorized distributors?
All LMV821DCKR 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 LMV821DCKR meets industry standards.
7.What is the process for return or replacement of LMV821DCKR?
All LMV821DCKR units undergo pre-shipment inspection (PSI). If there is an issue with LMV821DCKR, 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 LMV821DCKR part is unused and in its original packaging.
Return procedure for LMV821DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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