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Texas Instruments LMV321AUQDBVRQ1
- Part No.:
- LMV321AUQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321AUQDBVRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE-CHANNEL, 5.5-
- Quantity:
- Payment:
- Shipping:
Inventory:2,812
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Product details
Overview
LMV321AUQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified automotive single-channel rail-to-rail output operational amplifier, operating from 2.5 V to 5.5 V supply, with ±1 mV input offset voltage, 1 MHz unity-gain bandwidth, and 70 µA per channel quiescent current. It serves as a precision signal conditioning amplifier in low-voltage, space-constrained automotive sensor interfaces and current-sensing circuits.
For engineers reviewing the LMV321AUQDBVRQ1 datasheet, LMV321AUQDBVRQ1 pinout, LMV321AUQDBVRQ1 application, or LMV321AUQDBVRQ1 equivalent, key selection criteria include its rail-to-rail output swing (20 mV from rails at 10 kΩ), resistive open-loop output impedance (1200 Ω at 1 MHz), integrated RFI/EMI filtering, –40°C to +125°C operation, and SOT-23-5 packaging for compact PCB layouts.
Technical Context
The LMV321AUQDBVRQ1 employs a P-channel/N-channel complementary differential input stage enabling rail-to-rail input common-mode range (V– – 0.1 V to V+ – 1 V) and eliminating phase reversal under overdrive. Its class-AB output stage delivers full rail-to-rail swing while maintaining stability into ≥500 pF capacitive loads due to resistive open-loop output impedance.
This device operates as a unity-gain stable, low-noise (30 nV/√Hz at 10 kHz), low-input-bias-current (10 pA) amplifier optimized for single-supply automotive signal chains - particularly where supply headroom is limited and EMI resilience is critical, such as in HEV/EV motor control feedback loops and ADAS sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - supports direct integration into 3.3 V and 5 V automotive domains without level-shifting. |
| Input Offset Voltage | ±1 mV (typ) - enables accurate DC-coupled amplification in current-sense and battery-monitoring applications. |
| Unity-Gain Bandwidth | 1 MHz - sufficient for closed-loop bandwidths up to ~100 kHz in gain-of-10 configurations with margin. |
| Quiescent Current | 70 µA per channel - allows continuous operation in always-on vehicle subsystems without excessive power drain. |
| Output Swing (RL = 10 kΩ) | Within 20 mV of both rails - maximizes dynamic range when driving SAR ADCs with 0–VCC input ranges. |
| Open-Loop Output Impedance | 1200 Ω at 1 MHz - simplifies stability with high capacitive loads (e.g., long traces, ESD protection caps) without external isolation resistors. |
| EMI Rejection Ratio | ≥80 dB at 900 MHz - mitigates RF interference in infotainment and body-control modules near wireless transceivers. |
Pinout & Package
LMV321AUQDBVRQ1 is packaged in a 5-pin SOT-23 (DBV) package with nominal body size 1.60 mm × 2.90 mm and thermal resistance RθJA = 232.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplifier output | Class-AB rail-to-rail driver capable of sourcing/sinking ±40 mA; requires no external compensation for CL ≤ 500 pF. |
| 2: V– | Negative supply / ground reference | Connects to system ground in single-supply configurations; supports true rail-to-rail input common-mode down to V– – 0.1 V. |
| 3: +IN | Non-inverting input | High-impedance node (10 pA bias current); used for reference-based sensing or buffer configurations. |
| 4: –IN | Inverting input | High-impedance node; accepts feedback networks for precise gain-setting in transimpedance or difference-amplifier topologies. |
| 5: V+ | Positive supply | Accepts 2.5–5.5 V; internal ESD protection clamps inputs to V+ and V– rails - limits input overvoltage to ±0.5 V beyond supplies. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2 kV / CDM ±1 kV ESD robustness - suitable for engine bay and powertrain ECUs. |
| Rail-to-rail output swing | Drives within 20 mV of V+ and V– at 10 kΩ load - preserves >99% of ADC full-scale range in 3.3 V systems. |
| Integrated RFI/EMI filter | Rejects cellular, Bluetooth, and AM/FM band interference without external RC filters - reduces BOM count in noisy automotive environments. |
| No phase reversal on overdrive | Complementary input stage prevents output polarity inversion during input overvoltage - ensures safe behavior in fault conditions like sensor disconnect. |
| Stable into high capacitive loads | Resistive open-loop output impedance enables stable operation with ≥500 pF load capacitance - eliminates need for output isolation resistors in EMC-compliant designs. |
Applications
| Infotainment Power Monitoring | ADAS Camera Bias Supply |
|---|---|
|
Use Scenario: Real-time monitoring of 3.3 V domain current in head-unit power management ICs. IC Role / Device Role / Timing Role: Precision low-side current-sense amplifier feeding ADC input of system monitor MCU. Use Value: ±1 mV offset and 70 µA IQ enable sub-10 mA detection resolution with <1 µA standby penalty - critical for ISO 26262 ASIL-B diagnostics. |
Use Scenario: Providing stable, low-noise bias voltage to CMOS image sensor analog front-end in surround-view cameras. IC Role / Device Role / Timing Role: Unity-gain buffer isolating reference voltage from sensor load transients. Use Value: Rail-to-rail output and 30 nV/√Hz noise ensure <1 LSB error in 12-bit image sensor ADCs - preserving dynamic range under vibration-induced supply ripple. |
| EV On-Board Charger Feedback | Body Control Module Lighting Driver |
|
Use Scenario: Closed-loop current regulation in bidirectional OBC AC/DC stage using shunt-based sensing. IC Role / Device Role / Timing Role: High-speed (1 MHz GBW), low-drift amplifier in isolated current loop feedback path. Use Value: 1.7 V/µs slew rate and 850 ns overload recovery maintain fast transient response during grid-synchronization events - meeting IEC 61000-4-4 immunity requirements. |
Use Scenario: PWM dimming control interface between microcontroller and LED driver IC in interior lighting modules. IC Role / Device Role / Timing Role: Low-power comparator alternative for analog dimming level translation and fault flag conditioning. Use Value: 70 µA IQ and –40°C to +125°C operation allow continuous dimming calibration across cabin temperature extremes without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321QDR | Same core architecture but non-AEC-Q100; rated only to 105°C; lacks automotive qualification documentation and stress test reports. | Suitable for industrial or consumer-grade 3.3 V sensor nodes where automotive reliability is not mandated. | Select LMV321QDR only if AEC-Q100 compliance, extended temperature validation, and automotive PPAP support are unnecessary. |
| TSV911IQDBVRQ1 | Higher 8 MHz GBW and lower 1.8 nV/√Hz noise, but 150 µA IQ and narrower 2.7–5.5 V supply range. | Better for high-bandwidth ADAS radar signal conditioning; less optimal for ultra-low-power always-on battery monitoring. | Choose TSV911IQDBVRQ1 when bandwidth or noise dominates over quiescent current and supply flexibility. |
Compared with LMV321AUQDBVRQ1, LMV321QDR omits automotive qualification and thermal grade assurance, while TSV911IQDBVRQ1 trades 2.2× higher IQ and reduced supply range for 8× bandwidth - making LMV321AUQDBVRQ1 the optimal balance for cost-sensitive, low-power automotive signal conditioning where 1 MHz suffices.
Availability
LMV321AUQDBVRQ1 is available at Aetrix Electronics and suitable for infotainment power monitoring, ADAS camera bias supply, EV on-board charger feedback, and body control module lighting driver applications requiring stable component supply across automotive production lifecycles.
Supply support for LMV321AUQDBVRQ1 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 leader specializing in analog and embedded processing technologies, with deep expertise in automotive-grade IC design, manufacturing, and functional safety certification.
The LMV321AUQDBVRQ1 belongs to TI's LMV3xxA-Q1 family of AEC-Q100 qualified op amps engineered specifically for low-voltage, rail-to-rail signal conditioning in automotive infotainment, ADAS, powertrain, and body electronics systems.
FAQ
What is the maximum capacitive load the LMV321AUQDBVRQ1 can drive stably?
The LMV321AUQDBVRQ1 is characterized for stable operation with up to 500 pF capacitive load without external compensation. Its resistive open-loop output impedance (1200 Ω at 1 MHz) enables this capability - unlike conventional op amps that require series isolation resistors. For loads exceeding 500 pF, stability should be verified via phase margin measurement at the target gain configuration.
Does the LMV321AUQDBVRQ1 support true rail-to-rail input common-mode range?
The LMV321AUQDBVRQ1 supports input common-mode voltage from V– – 0.1 V to V+ – 1 V across its full 2.5 V to 5.5 V supply range. This includes the negative rail, enabling single-supply operation with grounded sensors. However, TI recommends limiting input voltages to ≤ V+ – 1 V to guarantee all electrical specifications - the N-channel input pair is included for phase-reversal immunity but not optimized for full-range operation.
What is the overload recovery time of the LMV321AUQDBVRQ1?
The LMV321AUQDBVRQ1 has a typical overload recovery time of 850 ns, defined as the time required for the output to return from saturation to linear operation after overdrive. This value is confirmed in the datasheet's Figure 6-23 and enables fast settling in current-sense applications with transient overloads, such as motor startup or short-circuit events in EV power stages.
Is the LMV321AUQDBVRQ1 pin-compatible with standard LMV321 variants?
Yes - the LMV321AUQDBVRQ1 uses the same SOT-23-5 (DBV) package and identical pinout as non-automotive LMV321 variants (e.g., LMV321IDBVR). Pin 1 is OUT, Pin 2 is V–, Pin 3 is +IN, Pin 4 is –IN, and Pin 5 is V+. This allows drop-in replacement in existing designs where AEC-Q100 qualification and extended temperature range are added requirements.
How does the integrated RFI/EMI filter in the LMV321AUQDBVRQ1 improve system-level EMC performance?
The LMV321AUQDBVRQ1 incorporates an on-die RFI/EMI rejection filter that provides ≥80 dB attenuation at 900 MHz (per Figure 6-30). This suppresses demodulation of cellular, LTE, and Bluetooth signals at the amplifier input - reducing spurious output offsets and enabling cleaner sensor readings in electrically noisy environments like infotainment head units or ADAS ECUs without adding external ferrite beads or RC filters.
LMV321AUQDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 1.7V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 70µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMV321AUQDBVRQ1 FAQ
1.How can I place an order for LMV321AUQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321AUQDBVRQ1 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 LMV321AUQDBVRQ1 reliable?
The price and inventory of LMV321AUQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321AUQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for LMV321AUQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321AUQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321AUQDBVRQ1?
LMV321AUQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321AUQDBVRQ1 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 LMV321AUQDBVRQ1?
For technical support, including LMV321AUQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321AUQDBVRQ1 requirements.
6.How does Aetrix verify that LMV321AUQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All LMV321AUQDBVRQ1 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 LMV321AUQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of LMV321AUQDBVRQ1?
All LMV321AUQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMV321AUQDBVRQ1, 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 LMV321AUQDBVRQ1 part is unused and in its original packaging.
Return procedure for LMV321AUQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV321AUQDBVRQ1 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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LM324DR
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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
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