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Texas Instruments LMV324QD
- Part No.:
- LMV324QD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMV324QD.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,174
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Product details
Overview
LMV324QD from Texas Instruments is a quad rail-to-rail output operational amplifier optimized for low-voltage single-supply operation (2.7 V to 5.5 V), delivering 1 MHz unity-gain bandwidth, 1 V/μs slew rate, and 410 μA typical supply current per amplifier - used in motor control feedback loops, HVAC sensor conditioning, and portable media player audio stages.
For engineers reviewing the LMV324QD datasheet, LMV324QD pinout, LMV324QD application, or LMV324QD equivalent, key selection criteria include rail-to-rail output swing down to 60 mV from rails at 10 kΩ load, –40°C to 125°C operating temperature range, input offset voltage of 1.7–7 mV, and SOIC-14 package compatibility with legacy LM324 layouts.
Technical Context
The LMV324QD implements a CMOS-input, rail-to-rail output op-amp architecture with common-mode input range extending to ground, enabling direct interfacing with single-ended sensors and microcontroller ADCs. Its internal compensation ensures stable unity-gain operation with capacitive loads up to 100 pF.
It features no crossover distortion due to complementary output stage design and supports both single-supply (2.7–5.5 V) and split-supply configurations. Input bias current remains below 250 nA across temperature, preserving accuracy in high-impedance transducer interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - enables direct integration into 3.3 V and 5 V systems without level-shifting. |
| Unity-Gain Bandwidth | 1 MHz - supports closed-loop gain ≥10 up to ~100 kHz with adequate phase margin. |
| Slew Rate | 1 V/μs - limits full-scale step response time to ≤1.5 μs for 1.5 V output swing. |
| Input Offset Voltage | 1.7–7 mV (typ) - introduces ≤0.7% error in 1 V full-scale sensor signal conditioning. |
| Rail-to-Rail Output Swing | Within 60–180 mV of rails (10 kΩ load) - maximizes dynamic range in low-voltage ADC interfaces. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial motor drive environments. |
| ESD Protection | 2000-V HBM - meets IEC 61000-4-2 Level 2 for board-level robustness. |
Pinout & Package
LMV324QD is supplied in a 14-pin SOIC package (8.65 mm × 3.91 mm body size), compatible with standard surface-mount assembly processes and legacy LM324 footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT | Output of Channel 1 | Drives external load; rail-to-rail swing supports full utilization of 3.3 V ADC reference. |
| 1IN– | Inverting Input of Channel 1 | Accepts feedback or inverted signal path; input common-mode range includes GND. |
| 1IN+ | Noninverting Input of Channel 1 | Connects to sensor or reference; high impedance (>10⁹ Ω) minimizes loading on source. |
| VCC+ | Positive Supply Rail | Single-supply pin; must be decoupled with 0.1 μF ceramic capacitor near package. |
| 2IN+ | Noninverting Input of Channel 2 | Independent channel input; shares same supply and ground as other channels. |
| 2IN– | Inverting Input of Channel 2 | Supports differential or inverting gain configuration without cross-channel coupling. |
| 2OUT | Output of Channel 2 | Electrically isolated output stage; capable of sourcing/sinking ±20 mA short-circuit current. |
| GND | Negative Supply / Reference | System ground return; must be low-impedance plane to minimize noise coupling between channels. |
| 3IN+ | Noninverting Input of Channel 3 | Third independent amplifier input; usable for multi-sensor signal conditioning or active filtering. |
| 3IN– | Inverting Input of Channel 3 | Enables precision summing or difference amplification with matched external resistors. |
| 3OUT | Output of Channel 3 | Delivers rail-to-rail output; thermal performance validated up to 125°C ambient. |
| 4IN– | Inverting Input of Channel 4 | Fourth channel input; supports redundant monitoring or dual-path signal processing. |
| 4IN+ | Noninverting Input of Channel 4 | Provides flexibility for instrumentation-grade front-end designs requiring four matched amps. |
| 4OUT | Output of Channel 4 | Final output stage; output voltage noise density is 39 nV/√Hz at 1 kHz (5 V supply). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables >95% utilization of 3.3 V ADC full scale without external level-shifting circuitry. |
| Low supply current (410 μA typ) | Reduces total system power by ~3× vs. LM324 (1.5 mA) in battery-powered HVAC controllers. |
| No crossover distortion | Preserves signal fidelity in audio preamplifier and pro-audio mixer applications up to 20 kHz. |
| Ground-sensing input range | Allows direct connection to 0–V sensor outputs (e.g., thermistors, RTDs) without negative supply. |
| –40°C to 125°C operation | Qualified for engine compartment and industrial motor control environments without derating. |
Applications
| Motor Control Feedback | HVAC Sensor Conditioning |
|---|---|
Use Scenario: Closed-loop speed regulation in AC induction motor drives using hall-effect or encoder signals. IC Role / Device Role / Timing Role: Quad op-amp configures as two differential receivers (channels 1&2) and two current-sense amplifiers (channels 3&4). Use Value: Rail-to-rail output ensures full 0–3.3 V range maps to PWM duty cycle without clipping at low supply voltages. | Use Scenario: Linearization and amplification of NTC thermistor outputs in residential HVAC control boards. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier front-end with matched gain-setting resistors on all four channels. Use Value: 1.7 mV input offset minimizes temperature measurement error (<±0.2°C at 25°C) across full operating range. |
| Portable Media Player Audio | Refrigerator Compressor Monitoring |
Use Scenario: Low-noise headphone driver and microphone preamplifier in compact media players. IC Role / Device Role / Timing Role: Channels 1–2 implement stereo line driver; channels 3–4 serve as mic bias and AGC amplifier. Use Value: 39 nV/√Hz input voltage noise preserves SNR >95 dB in 20 Hz–20 kHz audio band at 3.3 V supply. | Use Scenario: Real-time current sensing and overcurrent protection for variable-speed compressor motors. IC Role / Device Role / Timing Role: High-side current sense amplifier (channel 1) with fast comparator interface (channel 2) for fault detection. Use Value: 1 V/μs slew rate enables <2 μs response to 10 A step current faults, meeting IEC 60335 Class B timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM324DR | Wider supply range (3–32 V), higher ICC (1.5 mA), no rail-to-rail output (min swing = 1.5 V from rails at 5 V). | Legacy industrial designs requiring 12/24 V operation; unsuitable for 3.3 V-only systems. | Select LM324DR only when existing PCB layout uses DIP/SOIC-14 and system operates above 5 V. |
| TLV2464CDR | Lower input offset (0.6 mV typ), higher GBW (6.4 MHz), higher ICC (550 μA), same SOIC-14 package. | High-precision sensor signal chains needing sub-0.1% gain error; not cost-optimized for consumer appliances. | Choose TLV2464CDR when offset drift and bandwidth outweigh power and cost constraints. |
Compared with LM324DR and TLV2464CDR, LMV324QD delivers optimal balance of rail-to-rail output, ultra-low supply current, and extended temperature range in cost-sensitive 3.3 V embedded systems - making it preferred for next-generation HVAC, motor control, and portable electronics where voltage headroom is constrained.
Availability
LMV324QD is available at Aetrix Electronics and suitable for HVAC control units, motor drive feedback circuits, and portable media player audio subsystems requiring stable component supply across long production lifecycles.
Supply support for LMV324QD 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 over 90 years of innovation in power management, signal chain, and microcontrollers.
The LMV3xx product line was engineered specifically for low-voltage, space-constrained applications - delivering rail-to-rail output, ground-sensing inputs, and industry-leading power efficiency in standard packages for consumer, industrial, and automotive signal conditioning.
FAQ
What is the maximum operating temperature for LMV324QD?
The LMV324QD is specified for continuous operation from –40°C to +125°C ambient temperature, with electrical characteristics fully guaranteed across this range. This qualification makes LMV324QD suitable for under-hood automotive applications and industrial motor control enclosures where thermal management is limited. The device's thermal resistance (RθJA) is 113°C/W in SOIC-14 package, allowing safe operation at full load up to 125°C with minimal heatsinking.
Does LMV324QD support true rail-to-rail input?
No, LMV324QD does not support rail-to-rail input - its common-mode input voltage range extends to ground (0 V) but stops at VCC – 1.2 V (not VCC). However, it does provide rail-to-rail output swing, reaching within 60 mV of VCC and GND at light loads. For applications requiring full rail-to-rail input, consider TI's TLV2464 or OPA333 families. LMV324QD's ground-sensing capability remains sufficient for most single-supply sensor interfaces.
Can LMV324QD replace LM324 in existing designs?
Yes, LMV324QD is pin-compatible with LM324 in SOIC-14 packages and offers functional improvements including rail-to-rail output, lower supply current (410 μA vs. 1.5 mA), and wider temperature range (–40°C to 125°C vs. 0°C to 70°C). However, note that LMV324QD requires minimum 2.7 V supply - it will not operate below this threshold, unlike LM324 which functions down to 3 V. Verify supply stability and output swing margins before drop-in replacement.
What is the typical input bias current of LMV324QD?
The typical input bias current of LMV324QD is 15 nA at 25°C and 250 nA maximum across the full –40°C to 125°C temperature range. This low bias current enables high-impedance sensor interfaces (e.g., pH electrodes, piezoelectric transducers) without significant DC error. The input stage uses CMOS technology, resulting in bias current that doubles approximately every 10°C - a critical factor in precision thermistor or strain gauge circuits operating at elevated temperatures.
Is LMV324QD RoHS compliant and lead-free?
Yes, LMV324QD is RoHS compliant and lead-free, manufactured in accordance with JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) and qualified to TI's green chemistry standards. The SOIC-14 package uses matte tin lead finish with no lead content exceeding 1000 ppm by weight. Full compliance documentation, including IPC-1752 material declarations and REACH SVHC statements, is available through TI's Quality & Environmental page for LMV324QD.
LMV324QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- 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:
- 410µA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMV324QD FAQ
1.How can I place an order for LMV324QD through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV324QD 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 LMV324QD reliable?
The price and inventory of LMV324QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV324QD is usually 5 days.
3.What payment methods are accepted for LMV324QD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV324QD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV324QD?
LMV324QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV324QD 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 LMV324QD?
For technical support, including LMV324QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV324QD requirements.
6.How does Aetrix verify that LMV324QD is sourced from the original manufacturer or authorized distributors?
All LMV324QD 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 LMV324QD meets industry standards.
7.What is the process for return or replacement of LMV324QD?
All LMV324QD units undergo pre-shipment inspection (PSI). If there is an issue with LMV324QD, 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 LMV324QD part is unused and in its original packaging.
Return procedure for LMV324QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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