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Texas Instruments LMV821IDCKR
- Part No.:
- LMV821IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV821IDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,114
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Product details
Overview
LMV821IDCKR 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 125°C. It is used in portable sensor signal conditioning, battery-powered medical monitors, and compact industrial analog front-ends.
For engineers reviewing the LMV821IDCKR datasheet, LMV821IDCKR pinout, LMV821IDCKR application, or LMV821IDCKR equivalent, key selection considerations include its SC-70-5 package footprint, guaranteed operation over extended temperature, rail-to-rail output swing down to 100 mV from rails (at 2 kΩ load), and absence of crossover distortion in low-voltage audio and precision DC-coupled sensing paths.
Technical Context
The LMV821IDCKR employs a voltage-feedback architecture with internal compensation for unity-gain stability. Its input stage uses complementary bipolar transistors to achieve rail-to-rail common-mode input range (including ground) and low input bias current (≤150 nA).
Output stage is Class AB with rail-to-rail sourcing/sinking capability-delivering ±20 mA into 600 Ω while maintaining <0.3 V saturation at 5 V supply. Phase margin is 64.2° at 5 V with 22 pF capacitive load, supporting stable operation in high-impedance sensor interfaces and active filters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - supports direct connection to Li-ion, 3.3 V, and 5 V rails without regulation |
| Gain Bandwidth Product | 5.5 MHz typ at 5 V - enables stable closed-loop gain up to ~55 at 100 kHz for anti-aliasing or sensor amplification |
| Slew Rate | 1.9 V/μs typ at 5 V - sufficient for 10-bit ADC driving and 100-kHz full-scale sine wave reproduction |
| Input Offset Voltage | 3.5 mV max (–40°C to 125°C) - ensures ≤1.75 mV error in 0–2.5 V sensor spans without trimming |
| Output Swing | 0.1 V to 4.9 V (RL = 2 kΩ, VCC = 5 V) - provides >98% of rail-to-rail dynamic range for maximum SNR |
| Supply Current | 0.4 mA typ at 5 V - allows 10+ op-amps per 20-mA battery budget in ultra-low-power systems |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor IoT nodes |
Pinout & Package
LMV821IDCKR is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm, 0.65 mm pitch - optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail sourced/sunk current; requires local 100 nF bypass capacitor at VCC pin |
| 2 (IN−) | Inverting input | High-impedance node; sensitive to layout-induced leakage; must be guarded in high-Z sensor interfaces |
| 3 (GND/VCC−) | Ground / negative supply | Single-supply reference; connects to system ground plane; shared return path for all signals |
| 4 (IN+) | Non-inverting input | DC-coupled input node; supports common-mode range from –0.3 V to VCC+0.2 V (CMRR ≥50 dB) |
| 5 (VCC+) | Positive supply | Accepts 2.5–5.5 V; requires low-ESR ceramic decoupling within 2 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| No crossover distortion | Enables clean amplification of low-amplitude AC signals (e.g., ECG, piezo sensors) without notch artifacts |
| Rail-to-rail output swing | Maximizes dynamic range in 3.3 V and lower ADC systems, preserving resolution without level-shifting |
| Low 0.4 mA supply current | Permits integration into always-on sensor nodes with multi-year battery life on coin cells |
| Extended temperature grade (–40°C to 125°C) | Eliminates derating or thermal monitoring in automotive cabin modules and industrial PLC I/O stages |
| SC-70-5 ultra-small footprint | Reduces board area by ~50% vs. SOT-23-5, enabling placement directly at sensor terminals |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Amplifying microvolt-level bio-potential signals (e.g., pulse oximeter photodiode current) in wearable health monitors. IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier with rail-to-rail output driving 12-bit SAR ADC input. Use Value: 5.5 MHz GBW and low noise (42 nV/√Hz) preserve signal fidelity; 0.4 mA ICC extends charge cycle between USB recharges. | Use Scenario: Conditioning thermistor and humidity sensor outputs in field-deployed environmental loggers. IC Role / Device Role / Timing Role: Precision DC-coupled buffer and gain stage preceding low-power MCU ADC. Use Value: Input common-mode range including ground enables direct sensor grounding; 3.5 mV VIO avoids calibration in cost-sensitive consumer-grade units. |
| Automotive Cabin Electronics | Industrial Motor Control Feedback |
Use Scenario: Signal conditioning for HVAC blower speed feedback and seat occupancy detection in passenger compartment modules. IC Role / Device Role / Timing Role: Low-drift amplifier for resistive sensor bridges operating at 125°C ambient. Use Value: Guaranteed –40°C to 125°C operation eliminates thermal derating; rail-to-rail output drives comparator inputs directly. | Use Scenario: Isolated current-sense signal amplification in BLDC motor driver gate-drive feedback loops. IC Role / Device Role / Timing Role: High-speed, low-noise amplifier for shunt-based phase current measurement. Use Value: 1.9 V/μs slew rate supports accurate reconstruction of PWM-edge transients; 135 dB amplifier isolation prevents crosstalk in multi-channel designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV821DCKR | Same SC-70-5 package and electrical specs, but rated only for –40°C to 85°C operation | Not suitable for under-hood or high-ambient industrial use; acceptable for consumer portables and indoor IoT | Select LMV821DCKR only if full 125°C rating is unnecessary and cost is prioritized |
| TSV911ICT | Higher 8 MHz GBW and 2.5 V/μs slew rate; 60 μA lower ICC (0.34 mA typ); same SC-70-5 package | Superior for higher-frequency sensor interfaces (e.g., ultrasonic time-of-flight), but VIO max is 4.5 mV over temperature | Choose TSV911ICT when bandwidth or power efficiency outweighs offset-critical DC accuracy |
Compared with LMV821DCKR, the LMV821IDCKR adds extended temperature qualification without trade-offs in speed or quiescent current; versus TSV911ICT, it trades 2.5 MHz bandwidth for tighter offset control and broader legacy compatibility in TI-based designs.
Availability
LMV821IDCKR is available at Aetrix Electronics and suitable for portable medical devices, automotive cabin modules, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV821IDCKR 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 as a low-voltage, low-power op-amp series targeting space- and energy-constrained applications where rail-to-rail output and extended temperature performance are essential.
FAQ
What is the operating temperature range of the LMV821IDCKR?
The LMV821IDCKR is specified for continuous operation from –40°C to +125°C. This extended temperature grade is confirmed in the "Recommended Operating Conditions" table of the official TI datasheet (SLOS434I, Rev. July 2006) and applies across all electrical parameters unless otherwise noted. The LMV821IDCKR maintains full functionality-including gain bandwidth, slew rate, and output swing-within this full range, making it suitable for under-hood automotive and industrial environments where ambient temperatures exceed 105°C.
Does the LMV821IDCKR support true rail-to-rail input and output?
The LMV821IDCKR features rail-to-rail output swing and rail-to-rail input common-mode range that includes ground (VCC−). Specifically, the input common-mode voltage range extends from –0.3 V to VCC+ + 0.2 V (with CMRR ≥50 dB), enabling direct interfacing with grounded sensors and single-supply DACs. Output swing reaches within 100 mV of both rails under 2 kΩ load at 5 V supply. However, the input stage does not support voltages beyond the supply rails-true "beyond-the-rails" input capability is not provided.
What is the typical supply current of the LMV821IDCKR at 3.3 V operation?
At 3.3 V supply and 25°C, the LMV821IDCKR draws 0.32 mA typical supply current (ICC), interpolated from the 2.7 V (0.3 mA typ) and 5 V (0.4 mA typ) test points in the datasheet's electrical characteristics tables. This value remains stable across the –40°C to 125°C range, with a maximum of 0.6 mA over temperature. The low quiescent current enables integration into always-on, battery-operated systems such as wireless sensor nodes and wearables.
Is the LMV821IDCKR pin-compatible with other members of the LMV8xx family?
No-the LMV821IDCKR (single-channel, SC-70-5) is not pin-compatible with the LMV822 (dual, 8-pin DGK/D) or LMV824 (quad, 14-pin PW/DGV). Within the single-channel variants, LMV821IDCKR shares identical pinout with LMV821DCKR and LMV821IDBVR (SOT-23-5), but SC-70 and SOT-23 packages have different footprints and thermal characteristics. Direct PCB substitution requires layout revision; no drop-in replacement exists across package types.
Why is the LMV821IDCKR marked "Not Recommended for New Designs"?
Texas Instruments designated the LMV821IDCKR as "Not Recommended for New Designs" (NRND) due to product lifecycle management-not functional obsolescence. As stated in TI's 2016 Packaging Addendum, all LMV821 variants (including LMV821IDCKR) are obsolete or NRND, reflecting TI's strategic shift toward newer families like TLV9001 and TSV911 with improved specs and support. Existing designs may continue using LMV821IDCKR, but new projects should evaluate TI's recommended replacements for long-term supply assurance and technical enhancements.
LMV821IDCKR 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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LMV821IDCKR FAQ
1.How can I place an order for LMV821IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV821IDCKR 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 LMV821IDCKR reliable?
The price and inventory of LMV821IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV821IDCKR is usually 5 days.
3.What payment methods are accepted for LMV821IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV821IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV821IDCKR?
LMV821IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV821IDCKR 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 LMV821IDCKR?
For technical support, including LMV821IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV821IDCKR requirements.
6.How does Aetrix verify that LMV821IDCKR is sourced from the original manufacturer or authorized distributors?
All LMV821IDCKR 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 LMV821IDCKR meets industry standards.
7.What is the process for return or replacement of LMV821IDCKR?
All LMV821IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LMV821IDCKR, 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 LMV821IDCKR part is unused and in its original packaging.
Return procedure for LMV821IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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