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STMicroelectronics LMV321RIYLT
- Part No.:
- LMV321RIYLT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321RIYLT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,976
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Product details
Overview
LMV321RIYLT from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier in automotive-grade SOT23-5 packaging. It operates from 2.7 V to 6 V supply, delivers 1 MHz gain bandwidth, draws only 145 µA supply current per amplifier, and supports extended common-mode input range (VDD − 0.2 V to VCC + 0.2 V) at 25 °C - enabling precision signal conditioning in space-constrained, battery-powered automotive sensor interfaces.
For engineers reviewing the LMV321RIYLT datasheet, LMV321RIYLT pinout, LMV321RIYLT application, or LMV321RIYLT equivalent, this AEC-Q100 qualified op amp is selected for low-voltage, low-power analog front-ends where rail-to-rail swing, thermal stability across −40 °C to 125 °C, and ESD robustness (2 kV HBM) are critical design requirements.
Technical Context
The LMV321RIYLT employs a CMOS input stage enabling rail-to-rail input common-mode range and low input bias current (16–63 nA at 5 V), paired with a Class AB output stage delivering rail-to-rail output swing and ±48 mA short-circuit output current capability. Its 1 MHz GBP and 0.45 V/µs slew rate support stable unity-gain buffer and low-frequency active filtering up to ~100 kHz.
Designed for automotive environments, it features guaranteed operation from −40 °C to 125 °C, input offset voltage ≤6 mV over temperature, and 2 kV HBM ESD rating. The SOT23-5 package uses standard pinout (IN+, IN−, VDD, OUT, VSS) with thermal resistance RthJA = 250 °C/W, requiring careful PCB copper area management for thermal performance at full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V - enables direct use with Li-ion, 3.3 V, and 5 V automotive rails without LDO pre-regulation. |
| Gain Bandwidth Product | 1.3 MHz at 5 V - supports stable closed-loop gain ≥10 up to ~100 kHz for sensor amplification and anti-aliasing. |
| Supply Current per Amplifier | 162 µA typical at 5 V - allows >10-year battery life in always-on automotive diagnostic modules drawing <10 µA system sleep current. |
| Input Offset Voltage | ≤6 mV over −40 °C to 125 °C - ensures ≤0.6% error in 1 V full-scale medical-grade glucose meter front-end without trimming. |
| Common-Mode Input Range | VDD − 0.2 V to VCC + 0.2 V at 25 °C - permits direct sensing of signals referenced to ground or supply rail in single-supply systems. |
| Output Drive Capability | ±48 mA short-circuit current - drives 10 kΩ loads to rail with <100 mV headroom and supports driving ADC reference buffers or LED bias circuits. |
| ESD Rating (HBM) | 2 kV - meets IEC 61000-4-2 Level 2 for transient immunity in exposed automotive sensor nodes. |
Pinout & Package
SOT23-5 package (ECOPACK® compliant, RoHS-compliant, moisture sensitivity level 1). Dimensions: 2.90 mm × 1.60 mm × 1.30 mm (L × W × H); thermal resistance RthJA = 250 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Delivers rail-to-rail voltage swing; requires local 100 pF bypass capacitor when driving capacitive loads >100 pF. |
| 2 (IN−) | Inverting Input | High-impedance CMOS node; input bias current 16–63 nA at 5 V; sensitive to PCB leakage above 10 MΩ traces. |
| 3 (VSS) | Negative Supply / Ground | Must connect directly to low-impedance ground plane; shared return path with load increases output error due to 48 mA sink current. |
| 4 (IN+) | Non-inverting Input | Same CMOS characteristics as IN−; extended common-mode range allows direct connection to VSS or VDD without clamping diodes. |
| 5 (VDD) | Positive Supply | Accepts 2.7–6 V; internal ESD protection diodes clamp to VDD/VSS; decoupling capacitor (100 nF X7R) required within 3 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in 3.3 V systems - e.g., 0–3.3 V sensor output digitized by 12-bit SAR ADC without level-shifting. |
| 145 µA supply current per amplifier | Reduces quiescent power to 480 µW at 3.3 V - critical for always-on vehicle telematics modules constrained to <1 mW total standby power. |
| AEC-Q100 Grade 1 qualification | Guarantees parametric performance and reliability over −40 °C to 125 °C ambient - validated for engine bay and cabin-mounted sensors. |
| Extended common-mode input range | Supports direct interface to resistive bridge sensors biased at mid-supply without external level-shift networks or dual supplies. |
| 2 kV HBM ESD tolerance | Eliminates need for external TVS diodes in low-speed analog sensor paths - reduces BOM count and PCB area in compact ECUs. |
Applications
| Automotive Cabin Temperature Sensor | Portable Glucose Meter Front-End |
|---|---|
|
Use Scenario: Amplifies output of NTC thermistor network in HVAC control module, operating continuously at 85 °C ambient. IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier with 10 kΩ feedback, providing 0–3.3 V linearized output to microcontroller ADC. Use Value: Rail-to-rail output ensures full 12-bit ADC code utilization; 145 µA current enables 10-year battery life in backup mode. |
Use Scenario: Conditioned signal from electrochemical glucose strip in handheld medical device powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-noise (40 nV/√Hz), low-drift (2 µV/°C) instrumentation amplifier stage preceding 16-bit delta-sigma ADC. Use Value: Extended Vicm allows direct connection to strip working electrode; 6 mV max Vio avoids calibration drift beyond clinical accuracy requirement (±5%). |
| Engine Coolant Level Monitor | Laptop Battery Fuel Gauge Interface |
|
Use Scenario: Reads resistive float sensor in plastic expansion tank under under-hood thermal cycling (−40 °C to 125 °C). IC Role / Device Role / Timing Role: Precision voltage follower buffering sensor divider output to isolated CAN transceiver analog monitor input. Use Value: AEC-Q100 qualification ensures no parameter shift over 10,000 thermal cycles; 1.3 MHz GBP maintains phase margin >44° at 100 kHz. |
Use Scenario: Interfaces fuel gauge IC's analog voltage output (0.5–2.5 V) to host microcontroller ADC in ultrabook platform. IC Role / Device Role / Timing Role: Unity-gain buffer isolating gauge IC from ADC input capacitance and noise coupling on shared PCB layer. Use Value: Rail-to-rail input accepts full 0.5–2.5 V range without clipping; 162 µA ICC minimizes impact on system-level power budget (<50 µA added). |
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 |
|---|---|---|---|
| TSV851ILT | Higher GBP (1.5 MHz), lower Vio (1.5 mV typ), but higher ICC (220 µA) and no AEC-Q100 qualification. | Preferred for non-automotive portable instruments needing tighter DC accuracy; unsuitable for under-hood deployment. | Select TSV851ILT only if Vio < 2 mV and GBP > 1.2 MHz are mandatory, and automotive qualification is not required. |
| LMV321LILT | Same footprint and pinout, but industrial-grade (−40 °C to 125 °C) without AEC-Q100 screening or enhanced ESD (1.5 kV HBM). | Valid for cost-sensitive consumer electronics or industrial controls where automotive reliability testing is unnecessary. | Choose LMV321LILT for non-automotive designs where SOT23-5 compatibility and 145 µA ICC are key, but AEC-Q100 is not mandated. |
Compared with TSV851ILT and LMV321LILT, the LMV321RIYLT uniquely combines AEC-Q100 Grade 1 qualification, 2 kV HBM ESD, and 145 µA ICC in SOT23-5 - making it the only drop-in solution for automotive sensor signal chains requiring both reliability and ultra-low power.
Availability
LMV321RIYLT is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical diagnostics, engine monitoring systems, and laptop power management requiring stable component supply with full AEC-Q100 compliance and traceable sourcing.
Supply support for LMV321RIYLT 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 analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The LMV321RIYLT belongs to ST's general-purpose, low-power op amp product line - engineered specifically for cost-sensitive, space-constrained automotive and portable applications demanding rail-to-rail performance, wide temperature operation, and robust ESD immunity.
FAQ
Is LMV321RIYLT pin-compatible with LMV321ILT?
Yes - both use identical SOT23-5 packaging and standard pinout (OUT, IN−, VSS, IN+, VDD). However, LMV321RIYLT adds AEC-Q100 qualification, 2 kV HBM ESD rating, and tighter parametric screening across −40 °C to 125 °C, while LMV321ILT is industrial-grade only.
What is the maximum capacitive load the LMV321RIYLT can drive without instability?
The LMV321RIYLT remains stable with ≤100 pF capacitive load when configured as unity-gain buffer. For loads >100 pF, a 10 Ω series resistor between output and capacitor is required to maintain ≥44° phase margin, as verified in DS4539 Figure 10 and 11.
Does LMV321RIYLT support true rail-to-rail input when VCC = 2.7 V?
At 2.7 V supply and 25 °C, the common-mode input range is specified as VDD − 0.2 V to VCC + 0.2 V - meaning it accepts inputs from 0.1 V to 2.9 V. At full temperature range, inputs down to VSS are supported only if VCC ≤ 5.5 V.
Can LMV321RIYLT be used in a single-supply photodiode transimpedance amplifier?
Yes - its rail-to-rail input allows direct connection of photodiode cathode to VDD and anode to IN−, while the output swings to VSS for low-light detection. Use ≥10 kΩ feedback resistor and guard ring layout to minimize leakage; input bias current (16–63 nA) sets minimum detectable current floor.
LMV321RIYLT 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
LMV321RIYLT FAQ
1.How can I place an order for LMV321RIYLT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321RIYLT 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 LMV321RIYLT reliable?
The price and inventory of LMV321RIYLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321RIYLT is usually 5 days.
3.What payment methods are accepted for LMV321RIYLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321RIYLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321RIYLT?
LMV321RIYLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321RIYLT 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 LMV321RIYLT?
For technical support, including LMV321RIYLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321RIYLT requirements.
6.How does Aetrix verify that LMV321RIYLT is sourced from the original manufacturer or authorized distributors?
All LMV321RIYLT 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 LMV321RIYLT meets industry standards.
7.What is the process for return or replacement of LMV321RIYLT?
All LMV321RIYLT units undergo pre-shipment inspection (PSI). If there is an issue with LMV321RIYLT, 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 LMV321RIYLT part is unused and in its original packaging.
Return procedure for LMV321RIYLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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