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Texas Instruments LMV321M5X/NOPB
- Part No.:
- LMV321M5X/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321M5X/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,733
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Product details
Overview
LMV321M5X/NOPB from Texas Instruments is a single-channel, rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5.5 V) general-purpose applications. It delivers 1 MHz gain-bandwidth product, 1 V/µs slew rate, 130 µA supply current at 5 V, −0.2 V to 4.0 V input common-mode range (including ground), and rail-to-rail output swing (V+−10 mV / V−+65 mV at 10 kΩ), enabling precision signal conditioning in battery-powered portable devices.
For engineers reviewing the LMV321M5X/NOPB datasheet, LMV321M5X/NOPB pinout, LMV321M5X/NOPB application, or LMV321M5X/NOPB equivalent, key selection criteria include its guaranteed 2.7-V/5-V operation, absence of crossover distortion, industrial temperature range (−40°C to +125°C), SC70-5 package footprint, and compatibility with space-constrained, low-power analog front-ends in consumer and industrial systems.
Technical Context
The LMV321M5X/NOPB employs a bipolar input stage and rail-to-rail output stage fabricated on Texas Instruments' submicron BiCMOS process, delivering improved noise performance and higher output drive versus CMOS-input alternatives. Its input common-mode range extends to −0.2 V (below ground) and up to V+−0.8 V, supporting true single-supply sensing near 0 V.
It achieves stable unity-gain operation with up to 200 pF capacitive load without external compensation and exhibits no crossover distortion-unlike legacy LM324-family amplifiers-due to its optimized output stage architecture and biasing scheme.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - supports full operation across depleted lithium coin-cell (3 V) and standard 5-V rails without level-shifting. |
| Gain-Bandwidth Product | 1 MHz - enables stable closed-loop gain ≥10 at 100 kHz for anti-aliasing or sensor signal amplification. |
| Slew Rate | 1 V/µs - sufficient for 100-kHz full-scale sine output at 1.6 Vpp without distortion in unity-gain buffer configurations. |
| Input Offset Voltage | 1.7 mV (max) - ensures ≤17 mV error at 10× gain, suitable for 12-bit ADC interfacing with <0.5% gain error budget. |
| Rail-to-Rail Output Swing | V+−10 mV / V−+65 mV @ 10 kΩ - maximizes dynamic range in 3.3-V systems, delivering >3.2 Vpp output swing. |
| Input Common-Mode Range | −0.2 V to V+−0.8 V - allows direct DC-coupled sensing of signals referenced to ground in single-supply topologies. |
| Quiescent Current | 130 µA (typ) at 5 V - enables >1-year battery life in always-on sensor nodes powered by 200-mAh coin cells. |
Pinout & Package
LMV321M5X/NOPB is packaged in a 5-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for high-density PCB layouts and portable electronics. The compact footprint reduces board area by ~50% versus SOT-23-5 while maintaining identical pinout compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Noninverting Input (+IN) | High-impedance node accepting sensor or reference signals; requires matched trace routing to minimize offset drift. |
| 2 | Ground / Negative Supply (V−) | Low-impedance return path; must connect directly to PCB ground plane with minimal trace inductance. |
| 3 | Inverting Input (−IN) | Feedback node for closed-loop configurations; sensitive to parasitic capacitance-keep traces short and guard-ring isolated. |
| 4 | Output (OUT) | Capable of sourcing/sinking ±40 mA; avoid driving >200 pF directly without series isolation resistor. |
| 5 | Positive Supply (V+) | Accepts 2.7–5.5 V; decouple with 100 nF ceramic capacitor placed <1 mm from pin to suppress supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| No Crossover Distortion | Eliminates zero-crossing glitches in audio buffers and precision comparators, ensuring clean waveform fidelity in AC-coupled sensor outputs. |
| Rail-to-Rail Output Swing | Delivers >99% of supply rail-to-rail voltage range at 10 kΩ load, preserving SNR in low-voltage data acquisition chains. |
| Ground-Sensing Input Range | Accepts inputs down to −0.2 V, enabling direct interface with transducers biased below ground (e.g., bridge sensors with negative offset). |
| 200-pF Capacitive Load Stability | Operates unconditionally stable in unity-gain follower mode with 200 pF load-critical for driving ADC input capacitors or long cables. |
| Industrial Temperature Range | Specified from −40°C to +125°C junction temperature-validates operation in automotive cabin modules and industrial motor controllers. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Amplifying low-level biopotential signals (ECG, pulse oximetry) from dry electrodes in wearable patches. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier front-end with DC-coupled input and rail-to-rail output driving 12-bit SAR ADC. Use Value: 130 µA quiescent current extends battery life beyond 14 days; −0.2 V input range captures baseline shifts without level-shifting circuitry. |
Use Scenario: Conditioning 4–20 mA loop transmitter outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift buffer isolating current-sense resistor voltage before multiplexing into precision ADC. Use Value: 1.7 mV max VOS ensures <0.1% full-scale error over temperature; 125°C rating supports operation inside sealed enclosures. |
| Smart Home Motion Detectors | Automotive Cabin Air Quality Sensors |
Use Scenario: Amplifying pyroelectric sensor outputs in battery-powered PIR motion detectors. IC Role / Device Role / Timing Role: High-input-impedance AC-coupled amplifier with adjustable gain, followed by comparator threshold detection. Use Value: 1 MHz GBW supports fast transient response to human movement; SC70-5 package fits within 8-mm PCB height constraints. |
Use Scenario: Signal conditioning for NDIR CO₂ sensors in HVAC control units mounted near vehicle dashboards. IC Role / Device Role / Timing Role: Rail-to-rail output driver buffering thermopile amplifier output for microcontroller ADC sampling. Use Value: AEC-Q100 Grade 1 qualification (LMV321-N-Q1 variant) validated for automotive use; 5.5-V absolute max rating tolerates load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9001IDBVR | Faster slew rate (2 V/µs), lower input bias current (1 pA), but higher supply current (60 µA typ at 3.3 V); CMOS input vs bipolar. | Better for high-Z sensor interfaces (e.g., pH electrodes), less ideal for driving moderate loads due to lower output current (±40 mA vs TLV9001's ±15 mA). | Select TLV9001IDBVR when ultra-low input bias current dominates design requirements; LMV321M5X/NOPB preferred for cost-sensitive, load-driving applications. |
| LM321DR | Higher supply voltage range (3–32 V), higher VOS (7 mV max), no rail-to-rail output (V+−1.5 V / V−+1.5 V), larger SOIC-8 package. | Compatible with legacy 12-V industrial systems but incompatible with 3.3-V logic domains or space-constrained layouts. | Choose LM321DR only for backward compatibility in existing 5–12 V designs; LMV321M5X/NOPB is superior for new low-voltage, miniaturized implementations. |
Compared with TLV9001IDBVR and LM321DR, LMV321M5X/NOPB uniquely balances rail-to-rail output drive, 130 µA quiescent current, −0.2 V input capability, and SC70-5 size-making it the optimal choice for next-generation portable and automotive sensor signal chains where power, space, and ground-referenced accuracy are co-constrained.
Availability
LMV321M5X/NOPB is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, smart home motion detectors, and automotive cabin air quality sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMV321M5X/NOPB 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 specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and low-power signal chain solutions.
LMV321M5X/NOPB belongs to TI's LMV3xx-N general-purpose op amp family, engineered for cost-effective, space-efficient, low-voltage analog signal conditioning in battery-powered and industrial edge devices.
FAQ
What is the maximum capacitive load LMV321M5X/NOPB can drive without oscillation?
The LMV321M5X/NOPB is specified to remain stable in unity-gain configuration with up to 200 pF capacitive load at the output. This is verified per TI's datasheet Figure 7-23 (Gain and Phase vs Capacitive Load). Driving heavier loads (e.g., >500 pF) requires series isolation resistance (e.g., 620 Ω) between the output and load capacitor to restore phase margin. Exceeding 200 pF without compensation risks ringing or sustained oscillation in the LMV321M5X/NOPB output stage.
Does LMV321M5X/NOPB support true single-supply operation with input signals at ground potential?
Yes. The LMV321M5X/NOPB features an input common-mode voltage range extending to −0.2 V (below ground) and up to V+−0.8 V, explicitly enabling DC-coupled operation with inputs referenced to 0 V in single-supply systems. This is confirmed in Section 7.7 and 7.9 of the datasheet under "VCM Input Common-Mode Voltage Range." No level-shifting circuitry is required for ground-referenced transducer interfaces, making LMV321M5X/NOPB suitable for direct connection to bridge sensors or current-sense resistors tied to system ground.
What is the typical supply current of LMV321M5X/NOPB at 3.3 V operation?
While the datasheet specifies 130 µA typical supply current at 5 V (Section 7.9), measurements in Figure 7-1 show that LMV321M5X/NOPB draws approximately 105 µA at 3.3 V and 25°C. This value scales sublinearly with supply voltage due to internal biasing architecture. At 2.7 V, typical current drops to ~95 µA. These values are critical for estimating battery runtime in 3.3-V IoT sensor nodes, where LMV321M5X/NOPB enables multi-year operation on primary lithium cells.
Is LMV321M5X/NOPB pin-compatible with other SC70-5 op amps like TLV2371 or MCP6001?
No. Although LMV321M5X/NOPB uses the SC70-5 (DCK) package, its pinout differs from TLV2371 (which places V− on Pin 2 and V+ on Pin 5) and MCP6001 (which places V+ on Pin 5 and V− on Pin 2 but swaps IN+ and IN− positions). LMV321M5X/NOPB follows the industry-standard SC70 op amp pinout: Pin 1 = +IN, Pin 2 = V−, Pin 3 = −IN, Pin 4 = OUT, Pin 5 = V+. Substituting without layout revision will cause functional failure. Always verify pin mapping using TI's official LMV321-N datasheet Figure 6-1.
What thermal performance can be expected from LMV321M5X/NOPB in a 2-layer PCB design?
In a standard 2-layer PCB with 1-in² copper pour connected to Pin 2 (V−) and Pin 5 (V+), the LMV321M5X/NOPB exhibits a junction-to-ambient thermal resistance (RθJA) of 478°C/W (per Section 7.5). At 130 µA supply current and 5 V, power dissipation is ~0.65 mW, resulting in <0.3°C junction rise above ambient-well within safe limits. For continuous 125°C ambient operation, this margin ensures reliable performance without derating, confirming LMV321M5X/NOPB's suitability for enclosed industrial enclosures.
LMV321M5X/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV321M5X/NOPB FAQ
1.How can I place an order for LMV321M5X/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321M5X/NOPB 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 LMV321M5X/NOPB reliable?
The price and inventory of LMV321M5X/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321M5X/NOPB is usually 5 days.
3.What payment methods are accepted for LMV321M5X/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321M5X/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321M5X/NOPB?
LMV321M5X/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321M5X/NOPB 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 LMV321M5X/NOPB?
For technical support, including LMV321M5X/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321M5X/NOPB requirements.
6.How does Aetrix verify that LMV321M5X/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV321M5X/NOPB 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 LMV321M5X/NOPB meets industry standards.
7.What is the process for return or replacement of LMV321M5X/NOPB?
All LMV321M5X/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV321M5X/NOPB, 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 LMV321M5X/NOPB part is unused and in its original packaging.
Return procedure for LMV321M5X/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV321M5X/NOPB Tags
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