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Texas Instruments LMV321AQDBVRQ1
- Part No.:
- LMV321AQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMV321AQDBVRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE-CHANNEL, 5.5-
- Quantity:
- Payment:
- Shipping:
Inventory:1,873
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Product details
Overview
LMV321AQDBVRQ1 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 quiescent current per channel. It delivers rail-to-rail output swing within 20 mV of rails (at 10 kΩ load), supports single-supply low-side current sensing in HEV/EV motor control, and features integrated RFI/EMI filtering for robustness in noisy automotive environments.
For engineers reviewing the LMV321AQDBVRQ1 datasheet, LMV321AQDBVRQ1 pinout, LMV321AQDBVRQ1 application, or LMV321AQDBVRQ1 equivalent, key selection considerations include its AEC-Q100 qualification, capacitive-load drive capability up to 500 pF, resistive open-loop output impedance for stable high-CL operation, and compatibility with space-constrained infotainment and ADAS signal conditioning circuits.
Technical Context
The LMV321AQDBVRQ1 uses a P-channel/N-channel parallel 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 achieves true rail-to-rail swing with 1200 Ω open-loop output impedance at 1 MHz, simplifying stabilization with capacitive loads.
It operates across –40°C to +125°C ambient temperature, meets AEC-Q100 HBM Level 2 (±2 kV) and CDM Level C6 (±1 kV) ESD requirements, and maintains 76° phase margin at unity gain with 100 pF load - critical for reliable sensor interface and feedback loop stability in automotive powertrain and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - enables direct integration into 3.3 V and 5 V automotive domains without level-shifting. |
| Input Offset Voltage | ±1 mV (typ) - ensures <10 µV error in 10 mV shunt voltage sensing, critical for accurate current measurement in OBC and inverter applications. |
| Unity-Gain Bandwidth | 1 MHz - supports closed-loop response up to ~100 kHz for fast transient detection in ADAS sensor front-ends. |
| Quiescent Current | 70 µA per channel - allows continuous operation in always-on vehicle modules without compromising battery standby life. |
| Output Swing (RL = 10 kΩ) | Within 20 mV of rails at 5.5 V supply - maximizes dynamic range when driving SAR ADCs with 0–5 V input ranges. |
| Input Bias Current | ±10 pA - minimizes voltage error across high-impedance sensor bridges (e.g., thermistors, RTDs) in body electronics. |
| EMI Rejection Ratio | ≥60 dB at 900 MHz - suppresses RF interference from cellular/WiFi transceivers in infotainment head units. |
Pinout & Package
LMV321AQDBVRQ1 is packaged in a 5-pin SOT-23 (DBV) package with 1.60 mm × 2.90 mm body size, optimized for high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplifier output | Class-AB rail-to-rail driver capable of sourcing/sinking ±40 mA; connects directly to ADC input or next-stage filter. |
| 2: V– | Negative supply / ground reference | Common return for single-supply operation; must be low-impedance to minimize noise coupling in current-sense circuits. |
| 3: +IN | Non-inverting input | High-impedance node (5 pF common-mode capacitance); used for reference-based configurations like voltage followers. |
| 4: –IN | Inverting input | Differential input node (1.5 pF differential capacitance); accepts feedback network for precision gain setting in transimpedance amps. |
| 5: V+ | Positive supply | Accepts 2.5–5.5 V DC; internal ESD protection diodes clamp inputs to rails - requires external current limiting if VIN exceeds V+ by >0.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with full parametric performance, enabling use in engine bay and powertrain modules. |
| Rail-to-rail output swing | Drives within 20 mV of supply rails at 10 kΩ load - preserves >99% of ADC full-scale range in 12-bit systems with 5 V reference. |
| Resistive open-loop output impedance | 1200 Ω at 1 MHz - enables stable operation with ≥500 pF capacitive loads without external compensation, reducing BOM count. |
| Integrated RFI/EMI filter | Rejects >60 dB of 900 MHz interference - eliminates need for external ferrite beads in infotainment audio preamp stages. |
| No phase reversal under overdrive | Prevents latch-up and false triggering in safety-critical ADAS camera bias circuits during transient overvoltage events. |
Applications
| Infotainment Audio Preamp | HEV/EV Inverter Current Sensing |
|---|---|
|
Use Scenario: Amplifying low-level microphone or line-in signals in automotive head units with 3.3 V supply. IC Role / Device Role / Timing Role: Single-supply non-inverting amplifier with gain = 10, driving 10 kΩ ADC input. Use Value: Rail-to-rail output delivers full 0–3.3 V swing to maximize SNR; 30 nV/√Hz noise ensures clean audio capture below 20 kHz. |
Use Scenario: Low-side shunt voltage amplification in 400 V traction inverter motor phases. IC Role / Device Role / Timing Role: Precision current-sense amplifier with G = 48.3 (57.6 kΩ/1.2 kΩ), referenced to ground. Use Value: ±1 mV offset contributes <0.1% error at 100 mV shunt drop; 70 µA IQ enables always-on diagnostics without draining 12 V battery. |
| ADAS Camera Bias Supply | Body Control Module Window Lift |
|
Use Scenario: Providing stable bias voltage to CMOS image sensor analog front-end in forward-facing camera modules. IC Role / Device Role / Timing Role: Unity-gain buffer isolating reference voltage from varying sensor load currents. Use Value: 1 MHz bandwidth rejects switching noise from nearby DC-DC converters; AEC-Q100 qualification ensures reliability at 125°C junction temperature. |
Use Scenario: Monitoring motor current during power window lift/drop to detect obstruction via current threshold crossing. IC Role / Device Role / Timing Role: High-speed comparator input stage (configured as overcurrent detector with hysteresis). Use Value: 1.7 V/µs slew rate enables sub-µs response to stall events; 850 ns overload recovery prevents false triggers during motor startup surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSV911AQDBVRQ1 | Higher GBW (8 MHz), lower offset (±0.3 mV), but higher IQ (150 µA) and no integrated EMI filter. | Better for high-speed sensor interfaces (e.g., radar IF amplification), less suitable for ultra-low-power always-on modules. | Select when bandwidth >1 MHz is required and EMI immunity can be added externally. |
| LMV931QDBVRQ1 | Same 1 MHz GBW and rail-to-rail I/O, but wider supply range (1.8–5.5 V) and higher input bias current (100 pA). | Preferred for 1.8 V microcontroller interfaces; less accurate in high-impedance bridge sensors due to 10× higher IB. | Choose for mixed-voltage systems where 1.8 V logic compatibility is mandatory and offset drift is secondary. |
Compared with TSV911AQDBVRQ1 and LMV931QDBVRQ1, LMV321AQDBVRQ1 offers the optimal balance of AEC-Q100 robustness, ultra-low quiescent current, and built-in EMI rejection - making it the preferred choice for cost-sensitive, space-constrained automotive signal conditioning where power efficiency and noise immunity are co-prioritized.
Availability
LMV321AQDBVRQ1 is available at Aetrix Electronics and suitable for infotainment audio preamps, HEV/EV inverter current sensing, ADAS camera bias supplies, and body control module obstruction detection requiring stable component supply across automotive production lifecycles.
Supply support for LMV321AQDBVRQ1 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 and AEC-Q100 qualification processes.
The LMV321AQDBVRQ1 belongs to TI's LMV3xxA-Q1 family of low-voltage rail-to-rail op amps, engineered specifically for space-constrained, low-power automotive applications including infotainment, ADAS, and powertrain sensing where supply voltage headroom is limited.
FAQ
What is the maximum capacitive load LMV321AQDBVRQ1 can drive stably?
The LMV321AQDBVRQ1 is characterized to drive up to 500 pF capacitive load while maintaining stability and specified phase margin. Its resistive open-loop output impedance (1200 Ω at 1 MHz) enables predictable frequency response with higher loads, though external series resistance may be needed beyond 500 pF to prevent peaking. This capability is verified in Figure 6-21 of the official datasheet (SLOSE67D), where phase margin remains >45° at 1000 pF.
Does LMV321AQDBVRQ1 support true rail-to-rail input?
LMV321AQDBVRQ1 supports rail-to-rail output but not full rail-to-rail input: its input common-mode voltage range extends from V– – 0.1 V to V+ – 1 V across the 2.5–5.5 V supply range. This allows operation with inputs at the negative rail (enabling single-supply low-side sensing), but prohibits direct connection to V+ without attenuation. The datasheet specifies this in Section 6.7 under "Input Voltage Range".
Is LMV321AQDBVRQ1 pin-compatible with standard LMV321 variants?
No - LMV321AQDBVRQ1 is not pin-compatible with commercial-grade LMV321 variants. While both use SOT-23-5 packaging, the LMV321AQDBVRQ1 is AEC-Q100 qualified with enhanced ESD protection (HBM Level 2), tighter offset drift specs, and automotive-grade process controls. Pinout matches (V+, –IN, +IN, V–, OUT), but electrical behavior under extended temperature and stress conditions differs significantly.
What is the overload recovery time of LMV321AQDBVRQ1?
The overload recovery time of LMV321AQDBVRQ1 is 850 ns, defined as the time required for the output to recover from saturation to linear operation after overdrive. This value is confirmed in Section 7.3.4 of the datasheet and validated in Figure 6-23 (D028). It enables fast settling in comparator-like applications such as motor stall detection in body electronics.
Can LMV321AQDBVRQ1 operate from a 1.8 V supply?
No - LMV321AQDBVRQ1 has a minimum specified supply voltage of 2.5 V (±1.25 V), as stated in Section 6.3 "Recommended Operating Conditions". Operation below 2.5 V is not characterized or guaranteed; attempting 1.8 V supply may result in undefined output behavior, increased offset, or failure to meet AEC-Q100 specifications. For 1.8 V systems, consider LMV931QDBVRQ1 instead.
LMV321AQDBVRQ1 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
LMV321AQDBVRQ1 FAQ
1.How can I place an order for LMV321AQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321AQDBVRQ1 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 LMV321AQDBVRQ1 reliable?
The price and inventory of LMV321AQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321AQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for LMV321AQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321AQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321AQDBVRQ1?
LMV321AQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321AQDBVRQ1 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 LMV321AQDBVRQ1?
For technical support, including LMV321AQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321AQDBVRQ1 requirements.
6.How does Aetrix verify that LMV321AQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All LMV321AQDBVRQ1 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 LMV321AQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of LMV321AQDBVRQ1?
All LMV321AQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMV321AQDBVRQ1, 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 LMV321AQDBVRQ1 part is unused and in its original packaging.
Return procedure for LMV321AQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMV321AQDBVRQ1 Tags
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