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Texas Instruments LMV321AQDCKRQ1
- Part No.:
- LMV321AQDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LMV321AQDCKRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE-CHANNEL, 5.5-
- Quantity:
- Payment:
- Shipping:
Inventory:2,113
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Product details
Overview
LMV321AQDCKRQ1 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 LMV321AQDCKRQ1 datasheet, LMV321AQDCKRQ1 pinout, LMV321AQDCKRQ1 application, or LMV321AQDCKRQ1 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 SC70-5 packaging for compact PCB layouts.
Technical Context
The LMV321AQDCKRQ1 implements a P-channel/N-channel complementary input stage to enable rail-to-rail input common-mode range (V– – 0.1 V to V+ – 1 V) while eliminating phase reversal during overdrive. Its class-AB output stage delivers full rail-to-rail swing and stable operation 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 systems where supply headroom is limited and EMI robustness is critical-e.g., HEV/EV motor control feedback paths 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 sensing in low-side current monitor applications with ≤0.1% gain error. |
| Unity-Gain Bandwidth | 1 MHz - sufficient for closed-loop response in <100 kHz sensor signal conditioning and PWM-based feedback loops. |
| Quiescent Current | 70 µA per channel - allows always-on operation in battery-sensitive modules like body controllers and lighting ECUs. |
| Output Swing | Within 20 mV of rails (at 10 kΩ load) - maximizes dynamic range when driving SAR ADCs with 2.5 V or 3.3 V reference voltages. |
| 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 | ≥60 dB up to 1 GHz - suppresses RF interference from infotainment transmitters and switching power supplies in cabin environments. |
Pinout & Package
LMV321AQDCKRQ1 is packaged in a 5-pin SC70 (DCK) package measuring 1.25 mm × 2.00 mm, optimized for high-density automotive PCBs with thermal resistance RθJA = 246.6°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); accepts signals from resistive sensors or voltage dividers without loading error. |
| 4: V+ | Positive supply | Accepts 2.5–5.5 V; internal regulation ensures stable performance across automotive battery transients (ISO 7637-2 Pulse 4). |
| 5: –IN | Inverting input | Differential input node; used in transimpedance or inverting gain configurations; benefits from internal EMI filtering. |
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-meets automotive reliability requirements without derating. |
| 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. |
| Resistive open-loop output impedance | 1200 Ω at 1 MHz-enables stable operation into high-capacitance nodes (e.g., cable-driven displays, LED strings) without series damping resistors. |
| Integrated RFI/EMI filter | Rejects >60 dB of 100 MHz–1 GHz interference-eliminates need for external ferrite beads or RC filters in infotainment and ADAS subsystems. |
| No phase reversal under overdrive | Complementary input stage prevents output polarity inversion during input overvoltage-ensures safe behavior in fault conditions (e.g., sensor short-to-battery). |
Applications
| Infotainment Power Monitoring | ADAS Camera Bias Supply |
|---|---|
|
Use Scenario: Real-time monitoring of 5 V supply current to detect abnormal draw in head-unit USB ports or display drivers. IC Role / Device Role / Timing Role: Low-side current-sensing amplifier with 100 mV shunt, configured in non-inverting gain-of-41 to produce 0–4.1 V output for MCU ADC. Use Value: ±1 mV offset ensures <0.25% measurement error at 100 mA full scale; 70 µA IQ enables continuous monitoring without draining backup battery. |
Use Scenario: Providing stable, noise-immune bias voltage to image sensor analog front-end in rear-view camera module. IC Role / Device Role / Timing Role: Precision voltage follower buffering a filtered 2.8 V LDO output, rejecting GSM/Bluetooth RF coupling on shared PCB layers. Use Value: 30 nV/√Hz input noise and >60 dB EMI rejection prevent visible banding or pixel noise in captured video under cellular transmission. |
| EV On-Board Charger Feedback | Body Control Module Lighting Dimming |
|
Use Scenario: Isolating and scaling isolated current transformer output for digital control loop in 6.6 kW OBC primary-side current regulation. IC Role / Device Role / Timing Role: Single-supply inverting amplifier (G = –10) converting ±50 mV CT signal to ±0.5 V for isolated sigma-delta ADC. Use Value: Rail-to-rail input (V– – 0.1 V) accommodates negative-going CT waveform; 1 MHz GBW supports 50 kHz control loop bandwidth. |
Use Scenario: Closed-loop dimming control of LED headlamps using shunt current feedback and PWM-adjusted reference. IC Role / Device Role / Timing Role: Error amplifier comparing sensed LED current against PWM-modulated DAC reference in constant-current sink driver. Use Value: 1200 Ω open-loop output impedance ensures stability with 100 nF compensation cap across optocoupler input; –40°C to 125°C rating matches under-hood thermal profile. |
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 architecture and specs, but SOIC-5 package (larger footprint, higher RθJA = 232.5°C/W) and non-AEC-Q100 qualified. | Limited to industrial or non-safety-critical automotive modules; lacks Grade 1 temperature validation and ESD classification. | Select LMV321AQDCKRQ1 for production automotive systems requiring AEC-Q100 compliance and SC70 space savings. |
| TSV911IQDBVRQ1 | Higher GBW (8 MHz), lower offset (±0.3 mV), but higher IQ (150 µA) and no integrated EMI filter; same SC70-5 package. | Better for high-speed sensor interfaces (e.g., wheel speed), but less suitable for always-on battery monitoring due to 2.1× higher quiescent current. | Choose LMV321AQDCKRQ1 when ultra-low power and EMI immunity outweigh bandwidth needs in cost-sensitive modules. |
Compared with LMV321QDR and TSV911IQDBVRQ1, LMV321AQDCKRQ1 uniquely balances AEC-Q100 Grade 1 qualification, 70 µA quiescent current, and integrated EMI filtering in the smallest SC70-5 footprint-making it optimal for space- and power-constrained automotive signal chains where reliability is non-negotiable.
Availability
LMV321AQDCKRQ1 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 dimming requiring stable component supply across automotive production lifecycles.
Supply support for LMV321AQDCKRQ1 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 delivering analog and embedded processing solutions, with deep expertise in automotive-grade IC design, AEC-Q100 qualification, and high-reliability manufacturing.
The LMV321AQDCKRQ1 belongs to TI's LMV3xxA-Q1 family of automotive op amps, engineered specifically for low-voltage (2.5–5.5 V), rail-to-rail output signal conditioning in infotainment, ADAS, powertrain, and body electronics where EMI resilience and extended temperature operation are mandatory.
FAQ
What is the maximum capacitive load the LMV321AQDCKRQ1 can drive stably?
The LMV321AQDCKRQ1 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 predictable phase margin behavior beyond this value-verified up to 1000 pF in typical applications. For designs exceeding 500 pF, TI recommends verifying stability via small-signal step response testing per Figure 6-19 of the LMV321AQDCKRQ1 datasheet.
Does the LMV321AQDCKRQ1 support true rail-to-rail input operation?
The LMV321AQDCKRQ1 supports rail-to-rail input common-mode range from V– – 0.1 V to V+ – 1 V across its full 2.5 V to 5.5 V supply range. This is achieved via a complementary P/N-channel input stage that eliminates phase reversal. However, TI specifies optimal performance when input voltages remain below V+ – 1 V; operation beyond this may degrade CMRR and offset voltage.
What automotive qualification level does the LMV321AQDCKRQ1 meet?
The LMV321AQDCKRQ1 is AEC-Q100 qualified to Grade 1, meaning it is certified for operation from –40°C to +125°C ambient temperature, with HBM ESD classification Level 2 (±2 kV) and CDM ESD classification Level C6 (±1 kV). This qualification covers die, package, and assembly processes per AEC-Q100 Rev-H standards.
Can the LMV321AQDCKRQ1 be used in single-supply 3.3 V systems?
Yes-the LMV321AQDCKRQ1 is explicitly designed for single-supply operation from 2.5 V to 5.5 V. At 3.3 V, it delivers rail-to-rail output swing within 20 mV of both rails into 10 kΩ, maintains ±1 mV input offset, and draws only 70 µA quiescent current. Its input common-mode range extends to ground (V–), enabling direct interface with 0–3.3 V sensor outputs.
How does the integrated EMI filter in the LMV321AQDCKRQ1 improve system-level robustness?
The LMV321AQDCKRQ1 incorporates an on-die RFI/EMI rejection filter that provides ≥60 dB attenuation from 100 MHz to 1 GHz, as measured by EMIRR+ (Electromagnetic Interference Rejection Ratio). This eliminates susceptibility to cellular, Bluetooth, and Wi-Fi emissions in automotive cabins-reducing or removing the need for external ferrite beads, RC filters, or shielded enclosures in infotainment and ADAS sensor signal paths.
LMV321AQDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMV®
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- 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:
- SC-70-5
LMV321AQDCKRQ1 FAQ
1.How can I place an order for LMV321AQDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV321AQDCKRQ1 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 LMV321AQDCKRQ1 reliable?
The price and inventory of LMV321AQDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV321AQDCKRQ1 is usually 5 days.
3.What payment methods are accepted for LMV321AQDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV321AQDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV321AQDCKRQ1?
LMV321AQDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV321AQDCKRQ1 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 LMV321AQDCKRQ1?
For technical support, including LMV321AQDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV321AQDCKRQ1 requirements.
6.How does Aetrix verify that LMV321AQDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All LMV321AQDCKRQ1 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 LMV321AQDCKRQ1 meets industry standards.
7.What is the process for return or replacement of LMV321AQDCKRQ1?
All LMV321AQDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMV321AQDCKRQ1, 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 LMV321AQDCKRQ1 part is unused and in its original packaging.
Return procedure for LMV321AQDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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