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Texas Instruments LMV321IDCKT
- Part No.:
- LMV321IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV321IDCKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:8,295
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Product details
Overview
LMV321IDCKT from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5.5 V) operation, featuring 1 MHz unity-gain bandwidth, 1 V/μs slew rate, and 130 μA typical supply current. It operates across –40°C to +125°C and is housed in a 5-pin SC-70 package (2.00 mm × 1.25 mm), enabling compact signal conditioning in space-constrained portable electronics.
For engineers reviewing the LMV321IDCKT datasheet, LMV321IDCKT pinout, LMV321IDCKT application, or LMV321IDCKT equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases in battery-powered systems, and confirmed alternative parts with documented functional and packaging differences.
Technical Context
The LMV321IDCKT employs a CMOS input stage enabling rail-to-rail output swing and common-mode input voltage range extending to ground (–0.2 V to VCC – 0.2 V at 2.7 V). Its 1-MHz gain-bandwidth product and 60° phase margin ensure stable unity-gain buffer operation with capacitive loads up to 100 pF without external compensation.
It delivers 130 μA typical quiescent current per channel and supports single-supply operation down to 2.7 V while maintaining 50 dB minimum CMRR and 50 dB minimum PSRR - critical for precision sensing in noisy, low-power embedded systems where supply rejection and offset stability directly impact ADC front-end accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct interface with Li-ion battery (3.0–4.2 V) and 3.3-V logic without level-shifting. |
| Unity-Gain Bandwidth | 1 MHz - supports audio-frequency signal conditioning and sensor amplification up to ~100 kHz with <1% gain error. |
| Slew Rate | 1 V/μs - ensures ≤1 μs settling for 1-V step inputs, suitable for medium-speed analog-to-digital conversion interfaces. |
| Input Offset Voltage | 1.7 mV (min), 7 mV (typ) - defines baseline DC error in precision DC-coupled amplifiers; impacts 12-bit ADC accuracy at 3.3-V full scale. |
| Supply Current | 130 μA (typ) - allows continuous operation for >1 year on a 200-mAh coin cell in always-on sensor nodes. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive sensors and industrial motor control feedback loops. |
| ESD Rating | 2000-V HBM - meets IEC 61000-4-2 Level 2 for robustness in handheld device assembly and field environments. |
Pinout & Package
LMV321IDCKT is packaged in a 5-pin SC-70 (DCK) case measuring 2.00 mm × 1.25 mm, optimized for high-density PCB layouts and portable applications requiring minimal footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC+) | Positive Supply | Connects to main system rail (2.7–5.5 V); decoupling capacitor (0.1 μF) required within 2 mm for stability. |
| 2 (IN–) | Inverting Input | Differential node for feedback networks; high-impedance CMOS input draws <250 nA bias current. |
| 3 (IN+) | Noninverting Input | High-impedance sensor interface point; common-mode range includes GND, enabling single-supply transducer interfacing. |
| 4 (GND) | Negative Supply / Reference | System ground return; must be low-impedance path to minimize noise coupling into sensitive input nodes. |
| 5 (OUT) | Amplifier Output | Rail-to-rail capable (within 180 mV of rails at 10-kΩ load); drives ADC inputs, filters, or LED bias circuits directly. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings within 180 mV of VCC and GND at 10-kΩ load - eliminates need for dual supplies in sensor signal chains. |
| Low quiescent current | 130 μA typical - enables multi-year battery life in IoT edge nodes with continuous analog monitoring. |
| Ground-sensing input | Common-mode input range extends to –0.2 V - supports direct connection to 0-V referenced thermistors or current shunts. |
| Stable at unity gain | 60° phase margin with 100-pF capacitive load - permits direct driving of ADC input capacitance without external isolation resistor. |
| Wide temperature range | Specified from –40°C to +125°C - suitable for automotive cabin sensors and industrial PLC analog I/O modules. |
Applications
| Portable Media Players | Desktop PCs |
|---|---|
Use Scenario: Amplifying line-level audio signals from DAC outputs before headphone drivers. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail output op-amp configured as non-inverting gain stage (AV = 2). Use Value: Delivers full 0–3.3 V swing into 10-kΩ load with <1% THD+N at 1 kHz, preserving dynamic range in battery-powered audio paths. | Use Scenario: Monitoring 12-V rail voltage via resistive divider into ADC input. IC Role / Device Role / Timing Role: Precision buffer isolating high-impedance divider from ADC sampling capacitor. Use Value: 130-μA supply current minimizes loading on power-monitoring circuitry; rail-to-rail output ensures full-scale ADC utilization. |
| Motor Control: AC Induction | Refrigerators |
Use Scenario: Conditioning current-sense signals from shunt resistors in inverter leg feedback loops. IC Role / Device Role / Timing Role: Low-offset, high-CMRR amplifier with GND-referenced input for bidirectional current measurement. Use Value: 50 dB CMRR rejects PWM switching noise; 125°C rating supports placement near power modules without derating. | Use Scenario: Amplifying thermistor voltage in evaporator temperature feedback loop. IC Role / Device Role / Timing Role: DC-coupled, low-drift amplifier interfacing NTC thermistor to microcontroller ADC. Use Value: 7 mV typical VIO introduces <±0.5°C error over –20°C to +10°C range; 130 μA ICC enables always-on monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel rail-to-rail output op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDCKR | Lower VIO (0.75 mV typ), higher GBW (1 MHz), same SC-70 package, but 150 μA ICC (vs 130 μA). | Better DC precision for thermocouple amplification; slightly higher power draw limits ultra-low-power sleep modes. | Select TLV9001IDCKR when offset-limited accuracy dominates over battery life; LMV321IDCKT preferred for cost-sensitive, long-life applications. |
| LMV321DBVR | Identical electrical specs, but in SOT-23-5 (2.90 mm × 1.60 mm) - 44% larger footprint than SC-70. | Compatible functionally, but requires PCB layout change; used where SOT-23 pick-and-place infrastructure exists. | Choose LMV321DBVR only if SC-70 assembly capability is unavailable; LMV321IDCKT offers superior board area efficiency. |
Compared with TLV9001IDCKR and LMV321DBVR, LMV321IDCKT provides the lowest cost-per-function in ultra-compact SC-70 packaging with proven thermal robustness across –40°C to +125°C - making it optimal for high-volume consumer and industrial designs where size and reliability are prioritized over sub-millivolt offset.
Availability
LMV321IDCKT is available at Aetrix Electronics and suitable for portable media players, desktop PCs, motor control systems, and refrigeration electronics requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LMV321IDCKT 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, personal electronics, and communications markets.
The LMV3xx family was designed specifically for cost-sensitive, low-voltage (2.7–5.5 V) applications demanding rail-to-rail output swing, small footprint, and extended temperature operation - targeting portable, automotive, and industrial signal conditioning.
FAQ
What is the maximum operating supply voltage for LMV321IDCKT?
The absolute maximum supply voltage for LMV321IDCKT is 5.5 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable long-term performance, TI recommends staying within the Recommended Operating Conditions range of 2.7 V to 5.5 V. The LMV321IDCKT maintains full rail-to-rail output functionality and 1-MHz bandwidth across this entire range, making it ideal for systems powered by regulated 3.3-V or unregulated Li-ion sources.
Does LMV321IDCKT support true rail-to-rail input?
No, LMV321IDCKT does not support rail-to-rail input - its common-mode input voltage range extends from –0.2 V to (VCC – 0.2 V) at 2.7 V supply, meaning it can accept signals down to ground but not fully to VCC. However, it does provide rail-to-rail output swing, reaching within 180 mV of both rails at 10-kΩ load. This makes LMV321IDCKT well-suited for single-supply sensor interfaces where the input signal references GND, such as thermistor or current-shunt amplification, while still delivering full dynamic range to downstream ADCs.
What is the typical input offset voltage drift over temperature for LMV321IDCKT?
The average temperature coefficient of input offset voltage (αVIO) for LMV321IDCKT is 5 μV/°C, as specified in the Electrical Characteristics tables for both 2.7-V and 5-V supply conditions. Over the full –40°C to +125°C operating range, this results in a maximum drift contribution of ±825 μV relative to room-temperature offset. This predictable drift behavior enables effective software calibration in precision measurement systems, especially when combined with the device's stable 130-μA quiescent current and wide temperature qualification.
Can LMV321IDCKT drive capacitive loads without oscillation?
Yes, LMV321IDCKT is internally compensated for unity-gain stability and maintains ≥60° phase margin with capacitive loads up to 100 pF, as confirmed in Figure 6 (Stability vs Capacitive Load) of the datasheet. When driving larger capacitive loads (e.g., ADC input capacitance >100 pF), a series isolation resistor (typically 10–100 Ω) between the LMV321IDCKT output and the load is recommended to preserve stability. This behavior is critical for direct interfacing with SAR or sigma-delta ADCs without additional buffering stages.
Is LMV321IDCKT pin-compatible with other members of the LMV3xx family?
No, LMV321IDCKT is not pin-compatible with LMV358, LMV324, or LMV324S - it is a single-channel device in a 5-pin SC-70 package, whereas LMV358 is dual-channel (8-pin), LMV324 is quad-channel (14-pin SOIC or 16-pin TSSOP), and LMV324S adds shutdown pins. However, LMV321IDCKT shares identical electrical specifications and functional behavior with the LMV321DBVR (SOT-23-5) variant, differing only in package dimensions and thermal resistance. This allows drop-in replacement where SC-70 assembly is supported.
LMV321IDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 1.7 mV
- Current - Supply:
- 130µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 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
LMV321IDCKT FAQ
1.How can I place an order for LMV321IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321IDCKT 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 LMV321IDCKT reliable?
The price and inventory of LMV321IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321IDCKT is usually 5 days.
3.What payment methods are accepted for LMV321IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321IDCKT?
LMV321IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321IDCKT 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 LMV321IDCKT?
For technical support, including LMV321IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321IDCKT requirements.
6.How does Aetrix verify that LMV321IDCKT is sourced from the original manufacturer or authorized distributors?
All LMV321IDCKT 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 LMV321IDCKT meets industry standards.
7.What is the process for return or replacement of LMV321IDCKT?
All LMV321IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with LMV321IDCKT, 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 LMV321IDCKT part is unused and in its original packaging.
Return procedure for LMV321IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV321IDCKT Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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