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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics LMV321IYLT

Name: LMV321IYLT
Brand: STMicroelectronics
SKU: LMV321IYLT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LMV321IYLT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SC-74A, SOT-753

Datasheet:: LMV321IYLT.pdf

Description:: IC OPAMP GP 1 CIRCUIT SOT23-5

Quantity:: RFQ Add To RFQ list

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Inventory:4,338

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Product details

Overview

LMV321IYLT from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier in automotive-grade SOT23-5 package, operating from 2.7 V to 6 V supply, with 1 MHz gain bandwidth product, 145 µA supply current per amplifier, and extended common-mode input range (V_DD − 0.2 V to V_CC + 0.2 V). It serves as a low-power signal conditioning front-end in battery-powered medical sensors and portable instrumentation.

For engineers reviewing the LMV321IYLT datasheet, LMV321IYLT pinout, LMV321IYLT application, or LMV321IYLT equivalent, this device is selected for cost-sensitive, space-constrained designs requiring rail-to-rail operation, AEC-Q100 qualification, and stable performance across −40 °C to +125 °C ambient temperature.

Technical Context

The LMV321IYLT employs a CMOS input stage enabling rail-to-rail input common-mode range up to V_CC + 0.2 V and V_DD − 0.2 V at 25 °C, while maintaining 85 dB typical CMRR and 90 dB typical SVR at 5 V supply. Its internal compensation delivers 1.3 MHz GBP and 48° phase margin into 600 Ω/100 pF load, supporting unity-gain stable operation in sensor buffering and active filtering.

It features 3 mV max input offset voltage at 25 °C, 2 µV/°C drift, and 40 nV/√Hz input voltage noise - optimized for DC-coupled, low-frequency (<100 kHz) analog signal chains where precision and power efficiency are jointly critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 6 V - supports single-cell Li-ion (3.0–4.2 V) and dual-cell alkaline (3.0–4.5 V) systems without LDO pre-regulation.
Gain Bandwidth Product	1.3 MHz at V_CC = 5 V - enables stable unity-gain buffers and 2nd-order active filters up to ~100 kHz.
Supply Current per Amplifier	162 µA typical at 5 V - allows >10-year battery life in always-on glucose meter front-ends drawing <1 µA average system current.
Input Offset Voltage	3 mV max at 25 °C - ensures ≤0.3% full-scale error in 12-bit ADC interfaces with 1 V reference.
Common-Mode Input Range	V_DD − 0.2 V to V_CC + 0.2 V at 25 °C - permits direct sensing of signals referenced to ground or V_CC, e.g., thermistor dividers.
Output Drive Capability	±48 mA short-circuit current - sustains 2 kΩ load at rail-to-rail swing without clipping in transimpedance configurations.
ESD Rating (HBM)	2 kV - meets IEC 61000-4-2 Level 2 for handheld medical device touchpoints and PCB handling.

Pinout & Package

LMV321IYLT is housed in a RoHS-compliant, automotive-qualified SOT23-5 package (ECOPACK2), measuring 2.90 mm × 2.80 mm × 1.20 mm, with thermal resistance R_thJA = 250 °C/W and R_thJC = 81 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (OUT)	Amplifier output	Delivers rail-to-rail sourced/sunk current; requires local 100 pF bypass capacitor when driving capacitive loads >50 pF.
2 (−IN)	Inverting input	High-impedance CMOS node; sensitive to ESD - must be guarded or filtered in high-noise environments.
3 (V−)	Negative supply	Connected to GND (0 V) in single-supply operation; sets lower rail for rail-to-rail output swing.
4 (V+)	Positive supply	Accepts 2.7–6 V; decoupling capacitor (100 nF X7R) required within 3 mm of pin for stability.
5 (+IN)	Non-inverting input	Matches −IN bias current (≤63 nA); used for unity-gain follower or high-Z sensor interface.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables full dynamic range utilization with 0 V to V_CC signal sources and ADCs, eliminating level-shifting circuitry.
AEC-Q100 Grade 1 qualified	Validated for automotive cabin electronics (−40 °C to +125 °C), including infotainment sensor hubs and ADAS auxiliary monitors.
145 µA supply current per amplifier	Reduces quiescent power to 0.725 mW at 5 V - critical for coin-cell-powered wearable health patches.
Extended common-mode input range	Supports direct connection to resistive sensors tied to V_CC or GND without external biasing resistors.
1 MHz GBP with 48° phase margin	Guarantees stable closed-loop response in unity-gain buffer and 2-pole low-pass filter topologies without external compensation.

Applications

Glucose Meter Front-End

Portable ECG Signal Conditioning

Use Scenario: Amplifies weak current from glucose oxidase biosensor electrodes before 12-bit SAR ADC sampling.

IC Role / Device Role / Timing Role: Transimpedance amplifier with 10 MΩ feedback resistor, configured for DC-coupled, low-noise gain.

Use Value: 40 nV/√Hz input noise and 3 mV V_os limit measurement error to <0.5% over 0–30 mM glucose range.

Use Scenario: Buffers differential lead-II ECG signal (0.5–2 mV, 0.05–150 Hz) in handheld diagnostic device.

IC Role / Device Role / Timing Role: Rail-to-rail input follower isolating electrode interface from high-pass filter and instrumentation amp stages.

Use Value: Extended Vicm allows direct connection to AC-coupled electrode outputs referenced to mid-supply, avoiding bias network errors.

Automotive Cabin Temperature Sensor

Smart Smoke Detector Analog Front-End

Use Scenario: Interfaces NTC thermistor in HVAC control module, operating across −40 °C to +85 °C ambient.

IC Role / Device Role / Timing Role: Precision voltage follower driving ratiometric ADC reference path with minimal loading error.

Use Value: AEC-Q100 qualification and 2 µV/°C V_os drift ensure ±0.3 °C accuracy over full automotive temperature range.

Use Scenario: Amplifies photoelectric chamber current (10–100 pA) in battery-operated residential smoke alarms.

IC Role / Device Role / Timing Role: Low-I_ib (≤63 nA) transimpedance amplifier with 100 MΩ feedback for ultra-low-current detection.

Use Value: 145 µA supply current extends 9 V alkaline battery life to >5 years in standby mode with periodic self-test cycles.

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
TSV851ICT	Higher GBP (1.5 MHz), lower V_os (1.5 mV max), but 220 µA I_CC; same SOT23-5 footprint.	Better for higher-bandwidth sensor interfaces (>150 kHz), but increases battery drain by 50% vs. LMV321IYLT.	Select TSV851ICT only if GBP >1.2 MHz is required and supply current budget allows ≥200 µA.
LMV321LILT	Same specs except non-automotive grade (−40 °C to +125 °C not AEC-Q100 qualified); identical marking K177.	Suitable for industrial portable equipment but excluded from automotive Tier-1 BOMs requiring Q100 traceability.	Choose LMV321LILT for cost-sensitive consumer medical devices where AEC-Q100 is not mandated.

Compared with TSV851ICT and LMV321LILT, the LMV321IYLT uniquely balances AEC-Q100 compliance, sub-150 µA quiescent current, and 1.3 MHz bandwidth - making it optimal for automotive-qualified, battery-limited signal chains where reliability and power co-constrain selection.

Availability

LMV321IYLT is available at Aetrix Electronics and suitable for glucose meters, portable ECG monitors, automotive cabin temperature sensors, and smart smoke detectors requiring stable component supply under AEC-Q100 compliance and long-term production continuity.

Supply support for LMV321IYLT 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, designing and manufacturing microcontrollers, analog ICs, power management, and automotive-grade components since 1987.

The LMV321IYLT belongs to ST's general-purpose, low-voltage op-amp product line targeting cost-sensitive, space-constrained applications in portable medical, automotive cabin electronics, and industrial IoT edge nodes.

FAQ

What is the maximum junction temperature and thermal derating behavior of LMV321IYLT?

The absolute maximum junction temperature is 150 °C. With R_thJA = 250 °C/W in SOT23-5, continuous dissipation must stay below 4.8 mW at 25 °C ambient to avoid exceeding T_j limit. Derating begins at 70 °C ambient: maximum allowable power drops linearly to zero at 150 °C case temperature.

Does LMV321IYLT support true rail-to-rail output swing into 2 kΩ loads?

Yes - at V_CC = 5 V and T_A = 25 °C, VOL is 40–180 mV and VOH is 4.85–4.95 V into 10 kΩ, and 80–200 mV / 4.8–4.91 V into 2 kΩ. This confirms <100 mV headroom at both rails under typical load conditions.

How does the extended common-mode input range benefit sensor interfacing?

The Vicm range of V_DD − 0.2 V to V_CC + 0.2 V allows direct connection to sensors referenced to either supply rail - e.g., an NTC divider tied between V_CC and GND - without external bias resistors or level shifters, reducing component count and leakage-induced errors.

Is LMV321IYLT compatible with standard SOT23-5 PCB footprints used for LMV321ILT?

Yes - LMV321IYLT uses the identical SOT23-5 mechanical outline (DS4539 Figure 14) and land pattern as LMV321ILT, including pin 1 location, pad dimensions, and thermal pad absence. No layout change is needed when upgrading from industrial to automotive grade.

LMV321IYLT 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:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

LMV321IYLT FAQ

1.How can I place an order for LMV321IYLT through Aetrix?

Please submit a Request for Quotation (RFQ) for LMV321IYLT 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 LMV321IYLT reliable?

The price and inventory of LMV321IYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321IYLT is usually 5 days.

3.What payment methods are accepted for LMV321IYLT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321IYLT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LMV321IYLT?

LMV321IYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LMV321IYLT 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 LMV321IYLT?

For technical support, including LMV321IYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321IYLT requirements.

6.How does Aetrix verify that LMV321IYLT is sourced from the original manufacturer or authorized distributors?

All LMV321IYLT 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 LMV321IYLT meets industry standards.

7.What is the process for return or replacement of LMV321IYLT?

All LMV321IYLT units undergo pre-shipment inspection (PSI). If there is an issue with LMV321IYLT, 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 LMV321IYLT part is unused and in its original packaging.

Return procedure for LMV321IYLT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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