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Texas Instruments LMV821DCKRE4
- Part No.:
- LMV821DCKRE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV821DCKRE4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,698
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Product details
Overview
LMV821DCKRE4 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 and PDAs.
For engineers reviewing the LMV821DCKRE4 datasheet, LMV821DCKRE4 pinout, LMV821DCKRE4 application, or LMV821DCKRE4 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 0.17 V from VCC+ and 0.1 V from GND at 5 V/2 kΩ, and absence of crossover distortion in audio and sensor front-end designs.
Technical Context
The LMV821DCKRE4 employs a CMOS input stage with rail-to-rail output stage, supporting input common-mode voltage range extending 0.3 V below ground and up to 4.3 V at 5 V supply. Its internal architecture enables stable unity-gain operation with 64.2° phase margin and 8.7 dB gain margin when driving 600 Ω loads.
It operates across 2.5 V–5.5 V single-supply rails, with input offset voltage ≤3.5 mV (typ), input bias current ≤100 nA (typ), and 42 nV/√Hz input voltage noise at 1 kHz - making it suitable for precision DC-coupled amplification and low-noise AC signal paths.
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 systems without level-shifting. |
| Gain Bandwidth | 5.5 MHz typ at 5 V - enables stable closed-loop gain ≥10 at 500 kHz for anti-aliasing or active filtering. |
| Slew Rate | 1.9 V/μs typ at 5 V - supports 100 kHz full-power sine wave output at ~1.2 Vpp without distortion. |
| Output Swing | Rail-to-rail: 0.1 V above GND and 0.17 V below VCC+ at 5 V/2 kΩ - maximizes dynamic range in single-supply data acquisition. |
| Supply Current | 0.3 mA typ at 5 V - allows battery-powered operation >1 year on a CR2032 cell in duty-cycled sensor nodes. |
| Input Offset Voltage | ≤3.5 mV max over –40°C to 85°C - ensures <0.1% gain error in 12-bit ADC front-ends with 1 V full-scale reference. |
Pinout & Package
LMV821DCKRE4 is housed in a 5-pin SC-70 (DCK) package - measuring 2.0 mm × 1.25 mm × 0.9 mm - designed for ultra-dense PCB layouts and minimized parasitic capacitance in high-frequency sensor interfaces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Non-inverting input | Accepts signals from 0.3 V below GND to 4.3 V at 5 V supply; high-impedance CMOS node (≤100 nA bias). |
| 2 (GND/VCC−) | Ground / negative supply | Reference node for single-supply operation; must be low-impedance to minimize PSRR degradation. |
| 3 (IN−) | Inverting input | Differential pair input with matched offset and bias characteristics to IN+; used for feedback configuration. |
| 4 (VCC+) | Positive supply | Accepts 2.5–5.5 V; decoupling capacitor (≥100 nF) required within 2 mm for stability at full bandwidth. |
| 5 (OUT) | Amplifier output | Capable of sourcing/sinking ≥20 mA; rail-to-rail swing enables direct interface to SAR ADC inputs or LED drivers. |
Key Features
| Feature | Design Value |
|---|---|
| No crossover distortion | Eliminates 2nd-harmonic artifacts in audio preamps and precision instrumentation amplifiers. |
| Rail-to-rail output | Preserves >98% of available voltage headroom in 3.3 V systems, improving SNR in 12-bit+ data converters. |
| Low 0.3 mA supply current | Reduces thermal load in stacked multi-amplifier sensor modules and extends battery life in wearable devices. |
| 5.5 MHz GBW at 5 V | Supports closed-loop configurations up to 100 kHz with ≥40 dB gain margin for robust EMI immunity. |
| SC-70-5 package | Occupies 50% less board area than SOT-23-5, enabling placement adjacent to MEMS sensors to reduce pickup noise. |
Applications
| Portable Audio Preamp | Medical Sensor Signal Conditioning |
|---|---|
Use Scenario: Amplifying low-level microphone or piezoelectric transducer outputs in Bluetooth headsets and hearing aids. IC Role / Device Role / Timing Role: Single-supply, low-noise, rail-to-rail op-amp configured as non-inverting amplifier with gain = 10–100. Use Value: 42 nV/√Hz input noise and no crossover distortion preserve voice fidelity; 0.3 mA ICC enables >200-hour operation on coin-cell batteries. | Use Scenario: Conditioning ECG, pulse oximeter, or glucose sensor analog outputs before 12-bit ADC sampling. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with low input offset (≤3.5 mV) and rail-to-rail output for full-scale ADC utilization. Use Value: Input common-mode range includes ground allows direct connection to biopotential electrodes; 5.5 MHz GBW supports fast settling for multiplexed sensor arrays. |
| Industrial 4–20 mA Loop Receiver | Automotive Cabin Environment Monitor |
Use Scenario: Converting 4–20 mA loop current to 0.5–2.5 V voltage for microcontroller ADC input in PLC I/O modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with precision resistor feedback; operates from 3.3 V rail with minimal headroom loss. Use Value: Rail-to-rail output ensures full 2 V span fits within 3.3 V supply; 0.3 mA ICC reduces self-heating in sealed enclosures. | Use Scenario: Amplifying thermistor, humidity, or CO₂ sensor outputs in automotive HVAC control units. IC Role / Device Role / Timing Role: Low-power, temperature-stable amplifier with guaranteed operation from –40°C to 85°C. Use Value: 1 μV/°C input offset drift minimizes calibration frequency; SC-70 package enables compact placement near sensors on small PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV821DBVR | SOT-23-5 package (2.92 mm × 1.6 mm); identical electrical specs and temperature range (–40°C to 85°C). | Larger footprint but easier manual soldering and probe access; preferred for prototyping and low-volume production. | Select LMV821DBVR when board space permits and hand assembly or test probing is required. |
| TLV9001IDBVR | Lower 0.1 mA ICC, 1 MHz GBW, rail-to-rail I/O, same SC-70-5 package; specified for –40°C to 125°C. | Better power efficiency but lower bandwidth; suited for sub-100 kHz sensor buffering where ultra-low quiescent current is critical. | Choose TLV9001IDBVR for battery-powered automotive cabin sensors requiring extended temperature range and longer runtime. |
Compared with LMV821DBVR, LMV821DCKRE4 saves 50% board area but requires reflow-compatible layout; versus TLV9001IDBVR, it trades 0.2 mA higher ICC for +4.5 MHz bandwidth - critical for audio and fast-sampling applications.
Availability
LMV821DCKRE4 is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor transmitters, and automotive environment monitors requiring stable component supply across extended product lifecycles.
Supply support for LMV821DCKRE4 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 emphasis on reliability, precision, and energy efficiency.
The LMV8xx family was engineered for cost-sensitive, space-constrained applications demanding rail-to-rail output performance at 2.5–5.5 V - targeting portable consumer electronics, industrial sensing, and automotive cabin systems.
FAQ
What is the operating temperature range for LMV821DCKRE4?
The LMV821DCKRE4 is characterized for operation from –40°C to +85°C. This range is confirmed in the "Recommended Operating Conditions" table of the official TI datasheet (SLOS434I, Rev. July 2006). It is not rated for the extended –40°C to +125°C range offered by the LMV821I variants (e.g., LMV821IDCKRE4). Thermal derating is not required within this specified ambient range.
Does LMV821DCKRE4 support true rail-to-rail input?
No, LMV821DCKRE4 does not support rail-to-rail input. Its input common-mode voltage range extends from –0.3 V below GND to 4.3 V at 5 V supply (i.e., 0.7 V below VCC+). While the output swings rail-to-rail, the input stage requires ≥0.3 V headroom from GND and ≥0.7 V from VCC+ for linear operation - a key distinction from RRI/O amplifiers like the TLV9001.
What is the maximum capacitive load LMV821DCKRE4 can drive stably?
LMV821DCKRE4 maintains stability with capacitive loads up to 22 pF when configured for 40-dB closed-loop DC gain, per the datasheet's phase margin characterization (Figure 17–21). Driving larger loads (e.g., >100 pF) requires isolation resistance (≥500 Ω) in series with the output or external compensation, as unbuffered capacitive loading degrades phase margin below 60°.
Is LMV821DCKRE4 pin-compatible with other SC-70 op-amps like MCP6001 or TSX561?
No, LMV821DCKRE4 is not pin-compatible with MCP6001 or TSX561. Although all use SC-70-5 packages, pin assignments differ: LMV821DCKRE4 uses Pin 1=IN+, Pin 2=GND, Pin 3=IN−, Pin 4=VCC+, Pin 5=OUT; MCP6001 uses Pin 1=SHDN, Pin 2=IN−, Pin 3=IN+, Pin 4=GND, Pin 5=OUT; TSX561 uses Pin 1=NC, Pin 2=IN−, Pin 3=IN+, Pin 4=V−, Pin 5=OUT. Direct substitution requires PCB redesign.
Why is LMV821DCKRE4 marked "Not Recommended for New Designs"?
LMV821DCKRE4 is marked "Not Recommended for New Designs" (NRND) per TI's 2016 Packaging Addendum due to obsolescence planning - indicating TI no longer accepts new orders and recommends migration to newer alternatives like TLV9001 or OPA320. However, LMV821DCKRE4 remains fully functional, supported by existing datasheets, and available through authorized distributors for legacy program continuity.
LMV821DCKRE4 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
LMV821DCKRE4 FAQ
1.How can I place an order for LMV821DCKRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV821DCKRE4 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 LMV821DCKRE4 reliable?
The price and inventory of LMV821DCKRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV821DCKRE4 is usually 5 days.
3.What payment methods are accepted for LMV821DCKRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV821DCKRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV821DCKRE4?
LMV821DCKRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV821DCKRE4 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 LMV821DCKRE4?
For technical support, including LMV821DCKRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV821DCKRE4 requirements.
6.How does Aetrix verify that LMV821DCKRE4 is sourced from the original manufacturer or authorized distributors?
All LMV821DCKRE4 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 LMV821DCKRE4 meets industry standards.
7.What is the process for return or replacement of LMV821DCKRE4?
All LMV821DCKRE4 units undergo pre-shipment inspection (PSI). If there is an issue with LMV821DCKRE4, 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 LMV821DCKRE4 part is unused and in its original packaging.
Return procedure for LMV821DCKRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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