LM324QDRQ1 - Automotive Quad Op Amp, 1MHz, RRO | TI
Référence : LM324QDRQ1 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.62 | $0,62 |
| 10 | $0.56 | $5,60 |
| 100 | $0.44 | $44,00 |
| 500 | $0.38 | $190,00 |
| 1 000 | $0.31 | $310,00 |
| 2 500 | $0.27 | $675,00 |
LM324QDRQ1 Présentation
An operational amplifier (op amp) is a high-gain differential-input voltage amplifier and one of the most fundamental building blocks in analog electronics, used for signal conditioning, active filtering, and mathematical operations. Within the analog IC hierarchy, general-purpose op amps belong to linear integrated circuits, alongside comparators, voltage references, and voltage regulators. Quad op amps like this device integrate four matched amplifiers on a single die, saving board space and improving channel matching in multi-channel signal chains.
Key features include rail-to-rail output swing that maximizes dynamic range at low supply voltages, a maximum input offset voltage of 4 mV, and a typical common-mode rejection ratio (CMRR) of 65 dB. Each amplifier draws approximately 100 uA of quiescent current, enabling low-power designs, while internal frequency compensation guarantees unity-gain stability without external components.
Technically, the device uses bipolar process technology for good linearity, includes short-circuit protection and output current limiting for robustness, and specifies output current capability of around 160 mA per channel under rated conditions per distributor data. The AEC-Q100 qualification and wide temperature rating make it suitable for harsh automotive environments with 3.3 V and 5 V microcontroller-based systems.
Typical applications include automotive sensor signal conditioning (temperature, pressure, and position sensors), battery management system monitoring front-ends, and motor control circuits paired with MCUs such as TI C2000 and MSPM0 families.
Design tip: decouple the supply pin with a 0.1 uF ceramic capacitor placed close to the device, and respect the input common-mode range, which extends from ground to VCC - 1.5 V, to avoid phase-reversal and nonlinear behavior near the upper rail.
Alternatives de remplacement direct pour LM324QDRQ1 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LM324QDRQ1 (même facteur de forme et même empreinte) — différant par Output Type, Package, Supply Voltage Range.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LMV324QDRQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC3303DR2G
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LM324DR
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
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Voir la fiche technique →LM324QDRQ1 Valeurs maximales et caractéristiques électriques
| Amplifier Channels | 4 (Quad) |
| Gain-Bandwidth Product | 1 MHz |
| Type de sortie | Rail-to-Rail Output (RRO) |
| Supply Voltage Range | 2.7 V to 5.5 V (single) |
| Dual Supply Range | +/-1.35 V to +/-2.75 V |
| Input Offset Voltage (Max) | 4 mV |
| CMRR (Typ) | 65 dB |
| Quiescent Current per Amplifier | Approx. 100 uA |
| Output Current | Approx. 160 mA per channel |
| Unity-Gain Stability | Yes (internally compensated) |
| Short-Circuit Protection | Yes |
| Qualification | AEC-Q100 (Automotive) |
| Température de fonctionnement | -40C to +125C |
| Boîtier | 14-SOIC (D), 8.65 mm body |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de LM324QDRQ1
| Broche 1 | OUT1 — Amplifier 1 output (rail-to-rail) |
| Broche 2 | IN1- — Amplifier 1 inverting input |
| Broche 3 | IN1+ — Amplifier 1 non-inverting input |
| Broche 4 | VCC — Positive supply, 2.7 V to 5.5 V |
| Broche 5 | IN2+ — Amplifier 2 non-inverting input |
| Broche 6 | IN2- — Amplifier 2 inverting input |
| Broche 7 | OUT2 — Amplifier 2 output (rail-to-rail) |
| Broche 8 | OUT3 — Amplifier 3 output (rail-to-rail) |
| Broche 9 | IN3- — Amplifier 3 inverting input |
| Broche 10 | IN3+ — Amplifier 3 non-inverting input |
| Broche 11 | GND / VEE — Ground or negative supply |
| Broche 12 | IN4+ — Amplifier 4 non-inverting input |
| Broche 13 | IN4- — Amplifier 4 inverting input |
| Broche 14 | OUT4 — Amplifier 4 output (rail-to-rail) |
Applications typiques
LM324QDRQ1 convient pour 6 applications: Automotive Sensor Signal Conditioning, Battery Management System Monitoring, Motor Control Signal Conditioning, Low-Voltage Active Filtering, Comparators and Threshold Detection, Audio Preamplification in Vehicle Cabins.
Automotive Sensor Signal Conditioning
The LM324QDRQ1 fits automotive sensor front-ends because its AEC-Q100 qualification, -40C to +125C rating, and rail-to-rail output maximize ADC resolution for temperature, pressure, and position sensors on 5 V rails. Each channel acts as an amplifier or Sallen-Key filter feeding an MCU ADC; with 1 MHz GBW, filters up to tens of kHz are practical. The 4 mV max offset suits resistive sensors where calibration is performed in firmware, and four matched channels condition multiple sensors with one SOIC-14 device, saving board space.
Recommandé
Battery Management System Monitoring
In BMS front-ends, the LM324QDRQ1 amplifies shunt and divider signals before digitization. Its 2.7 V to 5.5 V supply allows direct operation from the measurement microcontroller rail, while the rail-to-rail output ensures the full ADC input range is usable even near battery thresholds. With approximately 100 uA per amplifier quiescent current, four channels add minimal standby drain to the monitoring supply. Used as differential-to-single-ended converters ahead of devices such as the BQ76952Q-Q1, it improves effective resolution for current and voltage measurements.
Recommandé
Motor Control Signal Conditioning
The LM324QDRQ1 conditions current-sense and position-feedback signals in automotive motor control systems built around TI C2000 MCUs. Its 1 MHz gain-bandwidth product supports filtering of PWM-frequency ripple in current loops up to tens of kHz, while short-circuit-protected outputs tolerate faulted sensor connections common in harsh environments. Rail-to-rail output preserves resolution when translating shunt voltages to the MCU ADC range, and the quad format handles three phase currents plus a reference channel in a single 14-SOIC package.
Recommandé
Low-Voltage Active Filtering
For 3.3 V single-supply analog filtering, the LM324QDRQ1 implements multiple Sallen-Key or multiple-feedback stages with one device. The rail-to-rail output prevents signal clipping near the positive rail, preserving dynamic range at low supply voltages, and internal compensation guarantees stability in unity-gain filter sections. At a 1 MHz gain-bandwidth product, corner frequencies up to roughly 50 kHz are realizable with acceptable Q accuracy. Approximately 100 uA per amplifier keeps total filter power under 0.5 mA, ideal for always-on automotive monitoring nodes.
Recommandé
Comparators and Threshold Detection
The LM324QDRQ1 serves as a low-cost comparator or window detector in automotive supervision circuits, using spare channels of the quad for undervoltage, overtemperature, or seat-position threshold detection. Open-loop operation with the RRO output driving logic inputs is practical at 5 V, and short-circuit protection adds robustness. The 4 mV offset limits threshold accuracy, so designs needing millivolt precision should use a dedicated comparator such as LM393DR; for coarse fault flags, the LM324QDRQ1 reduces BOM cost by consolidating functions.
Recommandé
Audio Preamplification in Vehicle Cabins
In low-cost automotive audio paths such as microphone preamps or alert-tone generators, the LM324QDRQ1 provides four gain stages from a single 5 V rail. The rail-to-rail output maximizes headroom for line-level signals at low supply, and no-crossover-distortion behavior of the family reduces artifacts at low output currents. The 1 MHz bandwidth comfortably covers the audio band with gain. Designers should bias inputs at mid-supply and note that noise performance suits alert tones better than high-fidelity audio, where TPA3116D2DADR class amplifiers take over downstream.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM324QDRQ1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LMV324QDRQ1 | MC3303DR2G | LM324DR |
|---|---|---|---|---|
| Package | 14-SOIC (D) | 14-SOIC (D) - same | 14-SOIC - same footprint | 14-SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | onsemi | Texas Instruments |
| Channels | 4 | 4 | 4 | 4 |
| Output Type | Rail-to-Rail Output | Rail-to-Rail Output | Not rail-to-rail | Standard output swing |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5 V | 3 V to 44 V | 3 V to 32 V |
Principaux différenciateurs
- AEC-Q100 automotive qualification with full -40C to +125C rating (vs LM324DR)
- Rail-to-rail output for maximum ADC dynamic range (vs MC3303DR2G)
- Lower supply voltage operation (2.7 V) (vs LM324DR)
Notes de conception
Decouple the VCC pin (pin 4) with a 0.1 uF ceramic capacitor placed within 5 mm of the device, plus a 2.2 uF bulk capacitor per quad. In automotive environments with load-dump transients on the 5 V rail, add a series resistor and TVS diode upstream. Keep the analog ground return path for pin 11 separate from high-current digital returns to prevent ground-bounce errors of several millivolts in sensor measurements.
The input common-mode range tops out at approximately VCC - 1.5 V even though the output is rail-to-rail. Circuits with gain configured near the upper rail (e.g., high-side shunt amplification at 5 V with inputs above 3.5 V) will exhibit nonlinear behavior or output inversion. Bias signals at mid-supply or use a dedicated high-side current-sense amplifier such as the INA240A1QPWRQ1 for high-side sensing.
Total quiescent current is approximately 400 uA for four amplifiers, but output-stage current must be budgeted: each output sourcing toward a load adds directly to supply current. When driving capacitive loads or long harnesses typical in automotive looms, add an isolation resistor of 20-50 ohm at each output to prevent instability; the internally compensated amplifier tolerates roughly up to a few hundred pF direct.
With a 1 MHz gain-bandwidth product, noise gain above 100 kHz rolls off quickly; set filter corner frequencies at most one-fifth of GBW divided by closed-loop gain for acceptable Q accuracy. In EMC-sensitive automotive nodes, limit closed-loop bandwidth with a small feedback capacitor (e.g., 100 pF across the feedback resistor) to reject RF ingress consistent with design practices in TI application notes for EMI-hardened op amp circuits.
Informations de conformité
AEC-Q100 automotive qualified per TI product family documentation. RoHS compliance typical for current TI SOIC production; verify certificate of conformance for REACH and halogen-free status.
