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STMicroelectronics LMV321RILT
- Part No.:
- LMV321RILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321RILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:41,544
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Product details
Overview
LMV321RILT from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier in SOT23-5 package, designed for low-voltage (2.7–6 V), low-power applications. It delivers 1 MHz gain bandwidth, 145 µA supply current per amplifier, ±1 mV input offset voltage (typ.), and operates across –40 °C to +125 °C - enabling use in glucose meters, portable medical sensors, and battery-powered instrumentation.
For engineers reviewing the LMV321RILT datasheet, LMV321RILT pinout, LMV321RILT application, or LMV321RILT equivalent, key selection criteria include rail-to-rail I/O swing at 2.7 V, extended common-mode range (VDD − 0.2 V to VCC + 0.2 V), thermal resistance (250 °C/W), ESD tolerance (2 kV HBM), and compatibility with space-constrained PCB layouts using SOT23-5.
Technical Context
The LMV321RILT employs a CMOS input stage enabling rail-to-rail input common-mode range up to VDD − 0.2 V and VCC + 0.2 V at 25 °C, and full rail operation below 5.5 V across temperature. Its internal compensation ensures stable unity-gain operation with 1 MHz GBP and 44° phase margin into 600 Ω/100 pF load.
It features low-noise (40 nV/√Hz), low THD (0.01%), and robust output drive capability: ±46 mA sink/source at 25 °C with 0.35 V/µs slew rate. Input bias current remains ≤9 nA (typ.) over full temperature range, supporting high-impedance sensor interfacing without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 6 V - supports single-cell Li-ion and dual-cell alkaline systems without LDO pre-regulation. |
| Gain Bandwidth Product | 1 MHz - sufficient for anti-aliasing, sensor buffering, and active filtering up to ~100 kHz. |
| Supply Current per Amp | 145 µA (typ.) - enables >1-year battery life in always-on wearable sensors drawing <10 µA system sleep current. |
| Input Offset Voltage | 0.1–3 mV (25 °C) - allows direct DC-coupled amplification of µV-level biomedical signals with <0.3% gain error. |
| Common-Mode Range | VDD − 0.2 V to VCC + 0.2 V - permits accurate sensing of signals referenced to ground or supply rails in single-supply topologies. |
| Output Drive | ±46 mA - drives 10 kΩ loads to rail while maintaining linearity, suitable for driving ADC reference buffers or LED bias circuits. |
| ESD Rating (HBM) | 2 kV - meets IEC 61000-4-2 Level 2 for handheld device front-end protection without external TVS. |
Pinout & Package
SOT23-5 package (2.9 × 2.8 × 1.3 mm, 250 °C/W θJA) with exposed pad not electrically connected; RoHS-compliant ECOPACK2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; capable of sourcing/sinking ±46 mA into resistive loads. |
| 2 (−IN) | Inverting input | High-impedance CMOS node; bias current ≤9 nA enables precision current-to-voltage conversion. |
| 3 (+IN) | Non-inverting input | Supports common-mode voltages down to VDD − 0.2 V - enables direct connection to grounded sensor outputs. |
| 4 (V−) | Negative supply / GND | Connected to system ground; serves as return path for input bias and output current. |
| 5 (V+) | Positive supply | Accepts 2.7–6 V; internal regulation ensures stable operation across battery discharge curve. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in 3.3 V or lower single-supply systems without level-shifting circuitry. |
| 145 µA supply current | Reduces quiescent power to 480 µW at 3.3 V - critical for multi-sensor nodes in energy-harvesting designs. |
| Extended Vicm (VDD − 0.2 V) | Permits direct interface with 0 V-referenced transducers (e.g., thermistors, strain gauges) without input biasing resistors. |
| 1 MHz GBP with 44° phase margin | Guarantees stability in unity-gain follower and active filter configurations without external compensation. |
| 2 kV HBM ESD rating | Eliminates need for discrete ESD protection on signal paths in consumer-grade portable medical devices. |
Applications
| Glucose Meter Front-End | Portable ECG Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying low-amplitude (1–10 mV), DC-coupled current output from glucose oxidase biosensors. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with rail-to-rail output driving 12-bit SAR ADC reference input. Use Value: 0.1 mV typical Vio and 40 nV/√Hz noise preserve signal integrity below 100 Hz, enabling sub-5 mg/dL measurement resolution. |
Use Scenario: Buffering and filtering weak biopotential signals (<5 mVpp) from dry-electrode chest leads. IC Role / Device Role / Timing Role: High-input-impedance non-inverting amplifier (G = 10) with 0.5–40 Hz bandpass filtering. Use Value: 9 nA max Iib prevents electrode polarization drift; 1 MHz GBP supports sharp 40 Hz roll-off without phase distortion. |
| USB-C Powered Sensor Hub | Smart Hearing Aid Microphone Bias |
|
Use Scenario: Level-shifting and conditioning analog outputs from MEMS pressure/humidity sensors powered by USB-C 5 V. IC Role / Device Role / Timing Role: Single-supply differential-to-single-ended converter feeding microcontroller ADC. Use Value: Rail-to-rail output swings 0–5 V fully, matching MCU ADC input range; 145 µA draw minimizes impact on shared 5 V bus. |
Use Scenario: Providing stable 2.5 V bias to electret microphone capsules in ultra-low-power hearing aids. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage follower sourcing 100 µA to mic capsule and RF filter network. Use Value: 2 µV/°C Vio drift prevents audible baseline shift during body-temperature variations; 0.01% THD preserves audio fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV851IST | Lower input offset (150 µV max), higher GBP (1.5 MHz), but 220 µA supply current. | Better DC accuracy for precision instrumentation; less suitable for multi-day battery life targets. | Select when Vio < 0.2 mV is mandatory and power budget allows +50% ICC. |
| LMV321LILT | Same footprint and specs, but qualified to AEC-Q100 Grade 2 (−40 °C to +105 °C) with enhanced screening. | Automotive cabin sensors requiring extended reliability validation and traceable lot control. | Select for automotive Tier-2 modules where qualification documentation and failure rate data are contractually required. |
Compared with TSV851IST and LMV321LILT, LMV321RILT offers optimal balance of ultra-low ICC (145 µA), production-proven reliability, and cost efficiency for industrial and portable medical designs operating within −40 °C to +125 °C without automotive qualification overhead.
Availability
LMV321RILT is available at Aetrix Electronics and suitable for glucose meters, portable ECG monitors, and USB-C sensor hubs requiring stable component supply, consistent SOT23-5 packaging, and guaranteed long-term manufacturability through STMicroelectronics' standard product roadmap.
Supply support for LMV321RILT 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for smart mobility, power, and sensing applications since 1987.
The LMV321RILT belongs to ST's general-purpose low-power op amp family, engineered specifically for cost-sensitive, battery-operated equipment where rail-to-rail performance, minimal quiescent current, and wide temperature operation are primary design constraints.
FAQ
What is the maximum capacitive load the LMV321RILT can drive without instability?
The LMV321RILT is characterized for stability with 100 pF capacitive load in unity-gain configuration, achieving 44° phase margin into 600 Ω series resistance. Driving >100 pF directly may cause peaking or oscillation; for larger loads, add a 10–100 Ω isolation resistor between output and capacitance, or use a dedicated buffer stage.
Does the LMV321RILT support true rail-to-rail input when VCC = 6 V?
At VCC = 6 V and 25 °C, the common-mode input range extends to VDD − 0.2 V and VCC + 0.2 V, meaning it accepts inputs from −0.2 V to +6.2 V. However, full rail-to-rail operation (down to VDD and up to VCC) is guaranteed only when VCC ≤ 5.5 V across the full −40 °C to +125 °C range per Table 2.
How does the LMV321RILT's input bias current compare to the LMV321LILT variant?
Both LMV321RILT and LMV321LILT specify identical input bias current: 1–63 nA (typ./max) over temperature. The "L" suffix denotes automotive qualification (AEC-Q100 Grade 2), not electrical differentiation - all DC and AC parameters match per DS4539 Rev 10.
Can the LMV321RILT be used in a single-supply photodiode transimpedance amplifier?
Yes - its rail-to-rail input allows the inverting node to be held at virtual ground near VDD (0 V), and rail-to-rail output swings fully to accommodate feedback resistor voltage drop. Use a low-leakage capacitor (e.g., C0G) in parallel with the feedback resistor to limit bandwidth and suppress noise; avoid input protection diodes that degrade leakage performance.
LMV321RILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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:
- 0.45V/µs
- Gain Bandwidth Product:
- 1.3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 16 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 162µA
- Current - Output / Channel:
- 48 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV321RILT FAQ
1.How can I place an order for LMV321RILT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321RILT 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 LMV321RILT reliable?
The price and inventory of LMV321RILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321RILT is usually 5 days.
3.What payment methods are accepted for LMV321RILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321RILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321RILT?
LMV321RILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321RILT 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 LMV321RILT?
For technical support, including LMV321RILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321RILT requirements.
6.How does Aetrix verify that LMV321RILT is sourced from the original manufacturer or authorized distributors?
All LMV321RILT 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 LMV321RILT meets industry standards.
7.What is the process for return or replacement of LMV321RILT?
All LMV321RILT units undergo pre-shipment inspection (PSI). If there is an issue with LMV321RILT, 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 LMV321RILT part is unused and in its original packaging.
Return procedure for LMV321RILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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