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STMicroelectronics LMV321ILT
- Part No.:
- LMV321ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321ILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:84,435
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Product details
Overview
LMV321ILT from STMicroelectronics is a single, rail-to-rail input/output operational amplifier in SOT23-5 package, designed for low-voltage portable systems. It operates from 2.7 V to 6 V, draws only 145 µA supply current per amplifier, delivers 1 MHz gain bandwidth product, and supports extended common-mode input range (VDD − 0.2 V to VCC + 0.2 V) at 25 °C - enabling precision signal conditioning in glucose meters and battery-powered medical sensors.
For engineers reviewing the LMV321ILT datasheet, LMV321ILT pinout, LMV321ILT application, or LMV321ILT equivalent, key selection criteria include its rail-to-rail I/O capability at sub-3 V operation, 3 mV max input offset voltage at 25 °C, 48 mA output drive strength, −40 °C to +125 °C operating temperature range, and SOT23-5 thermal resistance (250 °C/W).
Technical Context
This op-amp uses a CMOS input stage enabling rail-to-rail input common-mode range up to VCC + 0.2 V and VDD − 0.2 V at 25 °C, with guaranteed operation across −40 °C to +125 °C. Its 1 MHz GBP and 0.45 V/µs slew rate support stable unity-gain buffer and low-frequency active filtering in space-constrained designs.
The device features 85 dB typical CMRR and 90 dB typical PSRR at 5 V supply, ensuring robust performance against supply noise and common-mode interference in mixed-signal sensor front-ends. Input bias current remains below 63 nA over full temperature range, minimizing error in high-impedance transducer interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - enables direct use with single Li-ion or dual alkaline cells without regulation. |
| Supply Current per Amp | 145 µA typ. at 2.7 V - extends battery life in always-on medical monitors and wearables. |
| Gain Bandwidth Product | 1 MHz at 2.7 V, 1.3 MHz at 5 V - sufficient for anti-aliasing filters and sensor amplification up to ~100 kHz. |
| Input Offset Voltage | 3 mV max at 25 °C - ensures ≤0.3% gain error in 100 mV full-scale glucose sensor outputs. |
| Output Drive Capability | ±48 mA - drives 10 kΩ loads to rail with <100 mV saturation at 2.7 V supply. |
| Common-Mode Input Range | VDD − 0.2 V to VCC + 0.2 V at 25 °C - accepts inputs beyond rails for direct connection to resistive divider networks. |
| ESD Rating (HBM) | 2 kV - meets IEC 61000-4-2 Level 2 for handheld medical device handling robustness. |
Pinout & Package
SOT23-5 package (ECOPACK® compliant), 2.9 mm × 1.6 mm footprint, 1.3 mm height, thermal resistance RthJA = 250 °C/W. Designed for high-density PCB layouts in portable diagnostics and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Inverting Input (−) | Differential input node | Accepts feedback signals; supports stable closed-loop gains ≥1 with rail-to-rail common-mode range. |
| Non-inverting Input (+) | Differential input node | Connects to sensor reference or signal source; tolerates voltages up to VCC + 0.2 V at 25 °C. |
| Output | Amplified single-ended output | Drives ADC inputs or analog switches directly; rail-to-rail swing reduces need for level-shifting. |
| VCC | Positive supply terminal | Accepts 2.7–6 V; internal ESD protection clamps to ±2 kV HBM without external diodes. |
| GND | Reference ground terminal | Return path for bias and load currents; must be low-impedance to maintain PSRR >70 dB. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization with 2.7 V supply - critical for maximizing SNR in low-voltage biosensors. |
| 145 µA supply current per amplifier | Reduces quiescent power to 390 µW at 2.7 V - extends runtime in coin-cell–powered glucose meters by >30% vs. legacy op-amps. |
| Extended common-mode input range | VDD − 0.2 V to VCC + 0.2 V at 25 °C allows direct interfacing with unbuffered resistive bridges and thermistor networks. |
| 1 MHz gain bandwidth product | Supports stable unity-gain configuration for anti-aliasing filters with cutoff frequencies up to 100 kHz. |
| −40 °C to +125 °C operating range | Validated for industrial-grade portable diagnostics exposed to ambient temperature extremes during field use. |
Applications
| Glucose Meter Front-End | Portable ECG Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying microamp-level current from glucose oxidase electrochemical sensor into 0–3.3 V ADC range. IC Role / Device Role / Timing Role: Transimpedance amplifier with rail-to-rail output driving SAR ADC reference buffer. Use Value: 3 mV input offset ensures <0.1% measurement error at 100 mV full scale; 145 µA current enables >1-year battery life on CR2032. |
Use Scenario: DC-coupled amplification of 0.5–5 mV differential ECG signals in handheld monitor. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain block with adjustable common-mode rejection. Use Value: 85 dB CMRR suppresses 50/60 Hz mains interference; rail-to-rail I/O eliminates level-shifter ICs in 3.3 V system. |
| Laptop Battery Fuel Gauge | Wireless Sensor Node Analog Front-End |
|
Use Scenario: Precision sensing of cell voltage and current shunt in multi-cell Li-ion packs. IC Role / Device Role / Timing Role: High-side current sense amplifier and battery voltage buffer feeding fuel gauge IC. Use Value: Extended Vicm (VDD − 0.2 V) allows direct connection to shunt placed between battery+ and load, reducing BOM count. |
Use Scenario: Signal conditioning for MEMS accelerometer and temperature sensor in BLE-enabled environmental node. IC Role / Device Role / Timing Role: Low-power sensor interface amplifier preceding 12-bit ADC and ultra-low-power MCU. Use Value: 1 MHz GBP supports oversampling filter design; 250 °C/W RthJA permits operation at 85 °C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV851IST | Higher GBP (1.5 MHz), lower input offset (1.5 mV max), but 220 µA supply current. | Better for higher-frequency sensor excitation (e.g., ultrasonic distance sensing), less optimal for multi-year coin-cell life. | Select when bandwidth >1.2 MHz required and power budget allows +50% ICC increase. |
| LMV321LILT | Same pinout and specs, but specified for −40 °C to +85 °C only; not qualified for automotive or extended industrial temp. | Approved for consumer portables only; lacks AEC-Q100 qualification and extended temperature validation. | Choose for cost-sensitive consumer electronics where full −40 °C to +125 °C operation is unnecessary. |
Compared with TSV851IST, LMV321ILT trades 0.5 MHz bandwidth and 1.5 mV offset for 55% lower supply current - making it superior for decade-long battery life in medical disposables. Versus LMV321LILT, it adds 40 °C higher max operating temperature and full industrial qualification, justifying premium for field-deployed diagnostics.
Availability
LMV321ILT is available at Aetrix Electronics and suitable for glucose meters, portable ECG monitors, and laptop battery management systems requiring stable component supply across long production lifecycles and global regulatory approvals.
Supply support for LMV321ILT 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, with manufacturing facilities across Europe, Asia, and North America, serving automotive, industrial, and consumer markets.
The LMV321 series belongs to ST's general-purpose low-voltage op-amp product line, engineered specifically for battery-powered medical, portable, and industrial instrumentation where rail-to-rail operation and microamp quiescent current are mandatory.
FAQ
What is the maximum output current capability of LMV321ILT?
The LMV321ILT delivers ±48 mA output current under specified test conditions (Vid = ±100 mV, VO = VDD or VCC). This allows direct driving of 10 kΩ loads to rail at 2.7 V supply with <100 mV saturation voltage, eliminating need for external buffers in most portable sensor interfaces.
Does LMV321ILT support true rail-to-rail input at 125 °C?
At full temperature range (−40 °C to +125 °C), the common-mode input range is guaranteed from VDD to VCC when VCC ≤ 5.5 V. At 125 °C and 6 V supply, the extended Vicm (VDD − 0.2 V to VCC + 0.2 V) is not guaranteed - design margin requires limiting supply to 5.5 V for full rail access across temperature.
Can LMV321ILT drive capacitive loads without instability?
LMV321ILT is unity-gain stable with capacitive loads ≤100 pF, as verified in DS4539 Figure 10–11. For larger loads (e.g., ADC input capacitance >100 pF), a series resistor (≥100 Ω) between output and load is required to maintain phase margin >44° and prevent peaking or oscillation.
Is LMV321ILT qualified for automotive applications?
No - LMV321ILT is rated for −40 °C to +125 °C industrial operation but is not AEC-Q100 qualified. For automotive use, ST offers LMV321IYLT (SOT23-5, AEC-Q100 Grade 2) and LMV321RIYLT (AEC-Q100 Grade 1), both with enhanced screening and qualification documentation.
LMV321ILT 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
LMV321ILT FAQ
1.How can I place an order for LMV321ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321ILT 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 LMV321ILT reliable?
The price and inventory of LMV321ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321ILT is usually 5 days.
3.What payment methods are accepted for LMV321ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321ILT?
LMV321ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321ILT 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 LMV321ILT?
For technical support, including LMV321ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321ILT requirements.
6.How does Aetrix verify that LMV321ILT is sourced from the original manufacturer or authorized distributors?
All LMV321ILT 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 LMV321ILT meets industry standards.
7.What is the process for return or replacement of LMV321ILT?
All LMV321ILT units undergo pre-shipment inspection (PSI). If there is an issue with LMV321ILT, 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 LMV321ILT part is unused and in its original packaging.
Return procedure for LMV321ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV321ILT Tags
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