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Texas Instruments LMV321QDBVRQ1
- Part No.:
- LMV321QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321QDBVRQ1.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,756
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Product details
Overview
LMV321QDBVRQ1 from Texas Instruments is a single-channel, automotive-grade operational amplifier with rail-to-rail output swing, 1 MHz unity-gain bandwidth, 1 V/µs slew rate, and 130 µA typical supply current at 2.7 V. It operates from 2.7 V to 5.5 V and supports −40°C to +125°C ambient temperature, making it suitable for engine control sensor signal conditioning in passenger vehicles.
For engineers reviewing the LMV321QDBVRQ1 datasheet, LMV321QDBVRQ1 pinout, LMV321QDBVRQ1 application, or LMV321QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, input offset voltage (≤9 mV over full temp range), rail-to-rail output capability into 2 kΩ, common-mode input range extending to ground, and low-noise performance (39 nV/√Hz at 1 kHz).
Technical Context
The LMV321QDBVRQ1 uses a CMOS input stage enabling rail-to-rail output swing and ground-sensing input capability. Its internal architecture delivers stable unity-gain operation with ≥60° phase margin across load conditions up to 100 pF and resistive loads down to 2 kΩ.
It features no crossover distortion, supports single-supply operation from 2.7 V, and maintains specified performance over the full −40°C to +125°C automotive temperature range without requiring external compensation or trimming components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct interface with 3.3 V and 5 V microcontrollers and sensors without level-shifting. |
| Unity-Gain Bandwidth | 1 MHz - supports closed-loop gain configurations up to 100 kHz with ≤1% gain error for sensor amplification. |
| Slew Rate | 1 V/µs - ensures faithful reproduction of 100 kHz sine waves at 1 VPP without slew-induced distortion. |
| Input Offset Voltage | ≤9 mV (full temp range) - limits DC error to <±0.9% of full-scale when amplifying 1 V sensor outputs. |
| Supply Current | 130 µA typ at 2.7 V - allows battery-powered automotive modules to operate >10 years on coin-cell energy budgets. |
| Common-Mode Input Range | −0.2 V to VCC − 0.2 V - accepts signals referenced to ground in single-supply systems, e.g., thermistor bridges. |
| Output Swing | VCC − 100 mV (high), 65 mV (low) into 10 kΩ - delivers >97% of rail-to-rail dynamic range for ADC interfacing. |
Pinout & Package
SOT-23-5 (DBV) package: ultra-compact 2.9 mm × 1.6 mm footprint with 0.95 mm height, optimized for space-constrained automotive PCBs and compatible with standard pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Differential node for feedback configuration; accepts input down to −0.2 V below GND. |
| 2 (IN+) | Non-Inverting Input | High-impedance node (15 nA max bias) for sensor reference or signal source connection. |
| 3 (OUT) | Amplifier Output | Rail-to-rail capable driver delivering ±5 mA into 2 kΩ while maintaining linearity. |
| 4 (GND) | Analog Ground | Reference return path for input and output; must be connected directly to system ground plane. |
| 5 (VCC+) | Positive Supply | Single-supply input accepting 2.7–5.5 V; no negative rail required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range to successive-stage ADCs or comparators without headroom loss. |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C operation with stress testing per automotive reliability standards. |
| No crossover distortion | Ensures clean zero-crossing in AC-coupled audio or motor control feedback paths. |
| Ground-sensing input range | Enables direct connection to grounded thermistors, potentiometers, or bridge transducers. |
| Low 130 µA quiescent current | Reduces thermal load in sealed enclosures and extends battery life in always-on vehicle modules. |
Applications
| Engine Coolant Temperature Sensing | Body Control Module Window Motor Feedback |
|---|---|
Use Scenario: Amplifies low-level voltage from NTC thermistor in coolant passage, feeding 12-bit ADC in ECU. IC Role / Device Role / Timing Role: Precision DC amplifier with ground-referenced input and rail-to-rail output for maximum ADC utilization. Use Value: 9 mV max input offset ensures <±0.9% measurement error over full temperature range without calibration. | Use Scenario: Monitors back-EMF voltage during window lift/drop to detect obstruction via current signature analysis. IC Role / Device Role / Timing Role: High-speed comparator front-end amplifier with 1 V/µs slew rate preserving transient edge fidelity. Use Value: 1 MHz bandwidth captures 100 kHz motor commutation harmonics critical for stall detection. |
| Automotive Cabin Air Quality Sensor Interface | LED Headlamp Current Sense Amplifier |
Use Scenario: Conditions output of electrochemical CO₂ sensor with microamp-level output current into voltage for MCU ADC. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input bias current (15 nA typ) minimizing sensor loading error. Use Value: 15 nA input bias introduces <0.15% error in 10 µA sensor signal path, preserving ppm-level gas resolution. | Use Scenario: Amplifies voltage across shunt resistor in high-brightness LED headlamp driver to regulate current. IC Role / Device Role / Timing Role: Low-drift, rail-to-rail output amplifier driving PWM-controlled current sink. Use Value: 130 µA supply current minimizes self-heating in thermally constrained headlamp housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVRQ1 | Same silicon, I-temp grade (−40°C to +85°C); identical electrical specs except extended temp range not validated. | Not qualified for under-hood or powertrain locations requiring >85°C operation. | Select LMV321QDBVRQ1 for engine bay, transmission control, or ADAS modules where junction temperature exceeds 85°C. |
| TSV911IQDBVRQ1 | Higher 8 MHz GBW, 15 V/ms slew rate, but 120 µA supply current; AEC-Q100 Grade 0 (−40°C to +150°C). | Better suited for higher-frequency feedback loops (e.g., active suspension) but requires layout review for stability at 8 MHz. | Choose TSV911IQDBVRQ1 only when bandwidth >1 MHz is required; LMV321QDBVRQ1 remains optimal for cost-sensitive, low-bandwidth sensor interfaces. |
Compared with LMV321IDBVRQ1, LMV321QDBVRQ1 adds guaranteed operation to +125°C and full AEC-Q100 stress validation; versus TSV911IQDBVRQ1, it trades bandwidth for lower cost, proven stability, and reduced layout sensitivity in production automotive designs.
Availability
LMV321QDBVRQ1 is available at Aetrix Electronics and suitable for engine control units, body electronics modules, and ADAS sensor interfaces requiring stable component supply across automotive production lifecycles.
Supply support for LMV321QDBVRQ1 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies for industrial, automotive, and consumer markets.
The LMV3xx-Q1 product line was designed specifically for cost-sensitive, low-voltage automotive signal conditioning applications where rail-to-rail output, ground-sensing inputs, and AEC-Q100 compliance are mandatory.
FAQ
What is the operating temperature range of the LMV321QDBVRQ1?
The LMV321QDBVRQ1 is qualified for operation from −40°C to +125°C ambient temperature per AEC-Q100 Grade 1 requirements. This range is validated through accelerated stress testing including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing, ensuring reliability in under-hood and powertrain environments where the LMV321QDBVRQ1 is deployed.
Does the LMV321QDBVRQ1 support rail-to-rail input?
No, the LMV321QDBVRQ1 does not support rail-to-rail input. Its common-mode input voltage range extends from −0.2 V to VCC − 0.2 V, enabling ground-sensing capability but not full rail-to-rail input. The LMV321QDBVRQ1 achieves rail-to-rail output swing only, delivering VCC − 100 mV (high) and 65 mV (low) into 10 kΩ loads at 25°C.
Is the LMV321QDBVRQ1 pin-compatible with non-automotive LMV321 variants?
Yes, the LMV321QDBVRQ1 shares identical pinout and SOT-23-5 (DBV) package with LMV321IDBVRQ1 and LMV321IDBVR. All three use the same 5-pin topology: IN−, IN+, OUT, GND, VCC+. However, LMV321QDBVRQ1 is qualified to AEC-Q100 Grade 1 and undergoes additional automotive-specific screening not performed on commercial-grade versions.
What is the typical supply current of the LMV321QDBVRQ1 at 5 V?
The typical supply current of the LMV321QDBVRQ1 is 130 µA at 2.7 V and increases to 250 µA at 5 V, as confirmed in the Electrical Characteristics table (page 5, "ICC Supply current" row). This 92% increase reflects the device's current-source-based biasing architecture and remains well within low-power design constraints for always-on automotive subsystems.
Can the LMV321QDBVRQ1 drive capacitive loads without oscillation?
The LMV321QDBVRQ1 is stable driving up to 100 pF capacitive loads with ≥60° phase margin, as verified in Figure 3 and Figure 4 of the datasheet. For loads exceeding 100 pF, an isolation resistor (≥100 Ω) between output and capacitance is recommended to maintain stability, especially in high-EMI automotive environments where cable capacitance or ESD protection networks may add parasitic load.
LMV321QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 160 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV321QDBVRQ1 FAQ
1.How can I place an order for LMV321QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321QDBVRQ1 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 LMV321QDBVRQ1 reliable?
The price and inventory of LMV321QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for LMV321QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321QDBVRQ1?
LMV321QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321QDBVRQ1 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 LMV321QDBVRQ1?
For technical support, including LMV321QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321QDBVRQ1 requirements.
6.How does Aetrix verify that LMV321QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All LMV321QDBVRQ1 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 LMV321QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of LMV321QDBVRQ1?
All LMV321QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMV321QDBVRQ1, 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 LMV321QDBVRQ1 part is unused and in its original packaging.
Return procedure for LMV321QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV321QDBVRQ1 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
Texas Instruments
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
Texas Instruments
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