LM2902DRG3 - Quad 26V 1.2MHz Op Amp | Texas Instruments
MPN: LM2902DRG3 ✓ نشطLM2902DRG3 نظرة عامة
An operational amplifier, or op amp, is a high-gain analog signal-processing component used to amplify voltage differences, buffer sensors, drive analog inputs, and implement feedback-control circuits. The LM2902 belongs to the quad operational-amplifier family within the broader voltage-amplifier and analog-signal-processing semiconductor hierarchy. Its four amplifiers share power-supply pins but have independent input and output connections, allowing one package to implement four related analog functions.
The LM2902 operates from single or split supplies over a wide voltage range, making it useful in industrial-control, instrumentation, and audio circuits. Key characteristics include a 1.2 MHz gain-bandwidth product, 0.5 V/µs slew rate, and approximately 0.8 mA typical supply-current drain. Four frequency-compensated amplifiers support common closed-loop configurations including noninverting and inverting gain, voltage followers, comparators, summing amplifiers, and difference stages.
Its 14-pin SOIC package provides a familiar industrial footprint and thermal performance suitable for conventional through-hole assembly workflows. Because each channel is independent, the IC can implement sensor conditioning, signal amplification, active filtering, and control-loop functions on one board. Single-supply operation simplifies designs where the signal remains above ground, while split-supply operation supports bipolar signals centered around zero volts.
Typical applications include industrial sensor interfaces, transducers, audio preamplifiers, analog-to-digital converter input conditioning, motor-control support circuits, and general-purpose instrumentation. The wide supply range and low supply-current drain make the device practical in equipment powered from industrial rails or split supplies, provided the absolute maximum operating limits remain respected.
Designers should verify input and output common-mode limits for each supply configuration, account for the offset voltage when precision is important, and use stable feedback networks for unity-gain or noise-sensitive applications. PCB placement should keep sensitive input nodes compact, provide an appropriate ground-return path, and avoid placing high-current switching paths close to amplifier inputs.
This product page combines the LM2902 family specifications, package information, sourcing guidance, verified drop-in candidates, application examples, and practical design considerations. The comparisons also distinguish package-compatible alternatives from choices that require different qualification, temperature-range, or performance checks before substitution.
بدائل مباشرة لـ LM2902DRG3 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع LM2902DRG3 (نفس عامل الشكل والبصمة) — يختلف في Amplifier Type, Input Offset Voltage, Package.
LM2902DR
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2902KDRE4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM2902KDR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM2902BDR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
NCV2902DR2G
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM2902DRG3 الحدود القصوى والخصائص الكهربائية
| Amplifier Type | General-purpose operational amplifier |
| Number of Circuits | 4 circuits |
| Maximum Supply Voltage | 26 V |
| Dual-Supply Voltage Range | ±13 V |
| Gain-Bandwidth Product | 1.2 MHz |
| Input Offset Voltage | 2 mV |
| Slew Rate | 0.5 V/µs |
| Typical Supply-Current Drain | 0.8 mA |
| Supply Configuration | Single supply or split supply |
| العلبة | 14-SOIC (D), 3.90 mm width |
| Shipping Format | Tape and reel |
| حالة RoHS | Compliant |
تكوين أطراف LM2902DRG3
| دبوس 1 | OUT1 — Amplifier 1 output |
| دبوس 2 | IN1- — Amplifier 1 inverting input |
| دبوس 3 | IN1+ — Amplifier 1 non-inverting input |
| دبوس 4 | V+ — Positive supply connection |
| دبوس 5 | IN2+ — Amplifier 2 non-inverting input |
| دبوس 6 | IN2- — Amplifier 2 inverting input |
| دبوس 7 | OUT2 — Amplifier 2 output |
| دبوس 8 | OUT3 — Amplifier 3 output |
| دبوس 9 | IN3- — Amplifier 3 inverting input |
| دبوس 10 | IN3+ — Amplifier 3 non-inverting input |
| دبوس 11 | V- — Negative supply connection |
| دبوس 12 | IN4+ — Amplifier 4 non-inverting input |
| دبوس 13 | IN4- — Amplifier 4 inverting input |
| دبوس 14 | OUT4 — Amplifier 4 output |
التطبيقات النموذجية
LM2902DRG3 مناسب لـ 6 التطبيقs: Industrial Sensor Signal Conditioning, Audio Preamplifier and Mixer, ADC Input Conditioning, Power Supply Feedback Control, Motor Control Support Circuits, General-Purpose Instrumentation.
Industrial Sensor Signal Conditioning
The LM2902DRG3 suits industrial sensor conditioning because its four independent channels can amplify, filter, and buffer low-level signals within one 14-SOIC package. The 26 V maximum supply and approximately 0.8 mA typical supply-current drain are useful in equipment using industrial voltage rails. A 1.2 MHz gain-bandwidth product supports common low-frequency process, temperature, and pressure signals, while the 2 mV offset must be included in the error budget for precision measurements. Use one channel for the sensor amplifier and others for filtering or reference buffering, and verify common-mode range against the actual supply configuration.
موصى به
Audio Preamplifier and Mixer
The LM2902DRG3 can provide the general-purpose gain stages required in small audio preamplifiers and passive mixers. Four amplifiers in one 14-SOIC package reduce board area, and the 0.5 V/µs slew rate is useful for many low-bandwidth audio paths. The 1.2 MHz gain-bandwidth product is adequate for general audio and control signals rather than demanding high-fidelity wideband designs. Engineers should evaluate output swing, distortion, noise, and load drive for the intended audio impedance, and avoid using the device where the signal can approach unsupported common-mode or output-swing limits.
موصى به
ADC Input Conditioning
The LM2902DRG3 is appropriate for conditioning inputs that feed an analog-to-digital converter when the signal bandwidth is modest and the converter requires differential or single-ended drive. Its four channels can implement gain, filtering, level shifting, and buffering around the converter interface. The 1.2 MHz gain-bandwidth product and 0.5 V/µs slew rate support many low- and medium-speed acquisition systems, while the 2 mV offset may require calibration for high-resolution measurements. Verify the ADC input range, settling requirements, and the op amp’s output-swing capability to ensure each channel can charge the sampling network without clipping.
موصى به
Power Supply Feedback Control
The LM2902DRG3 can implement error amplifiers, voltage-feedback loops, and current-feedback helpers in industrial power-conversion systems. Its 26 V maximum supply rating supports higher-voltage control environments, while four amplifiers provide dedicated channels for sensing, compensation, and auxiliary control functions. The approximately 0.8 mA typical supply-current drain is modest for a quad amplifier, and the 1.2 MHz bandwidth is useful in many control loops. Stability depends on the compensation network and power-stage dynamics, so use the loop-gain data from the relevant power-conversion design rather than selecting compensation values from bandwidth alone.
موصى به
Motor Control Support Circuits
The LM2902DRG3 can support auxiliary functions around industrial motor controllers, including current sensing, transducer amplification, limit comparison support, and error-amplifier stages. Its wide supply capability is compatible with many 24 V industrial systems when the total voltage stays within the 26 V rating and appropriate transient protection is used. Four independent amplifiers simplify distributed control functions, but the 1.2 MHz bandwidth and 2 mV offset may not satisfy precision current-limit or high-speed protection requirements. Place the device away from switching nodes, route its ground return carefully, and validate noise immunity under the actual PWM operating conditions.
موصى به
General-Purpose Instrumentation
The LM2902DRG3 is a practical choice for laboratory and field instrumentation requiring several general-purpose analog functions. Its four channels can form noninverting and inverting amplifiers, voltage followers, active filters, summing stages, and difference amplifiers. The 26 V supply class accommodates both low-voltage and split-supply test equipment, while approximately 0.8 mA typical supply-current drain helps control consumption. For precision bridges, low-level sensors, or thermocouples, evaluate offset and bias-current requirements against higher-accuracy devices. Use the pin-description and electrical tables in the manufacturer datasheet when implementing each channel and its feedback network.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM2902DRG3 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LM2902DR | LM2902KDRE4 | LM2902KDR | LM2902BDR | NCV2902DR2G |
|---|---|---|---|---|---|---|
| Package | 14-SOIC (D) | 14-SOIC (D) | 14-SOIC (D) | 14-SOIC (D) | 14-SOIC (D) | 14-SOIC (D) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Number of Amplifiers | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits | 4 circuits |
| Maximum Supply Voltage | 26 V | 26 V | 26 V | 26 V | 26 V | 26 V |
| Dual-Supply Rating | ±13 V | ±13 V | ±13 V | ±13 V | ±13 V | ±13 V |
| Supply Configuration | Single or split supply | Single or split supply | Single or split supply | Single or split supply | Single or split supply | Single or split supply |
أبرز الفروقات
- Four independent amplifiers in one standard industrial package (مقابلNCV2902DR2G)
- Documented general-purpose performance family (مقابلLM2902BDR)
- Single-package consolidation for four analog functions (مقابلLM2904P3)
ملاحظات التصميم
Do not assume that every LM2902-family orderable code has the same temperature grade or qualification status. The LM2902DRG3 operates from a 26 V-class supply, but the input common-mode range and output swing depend on the actual rail voltage. Before finalizing a design, check the operating and absolute-maximum tables, ensure the output does not clip, and account for the 2 mV input offset in the system error budget.
Keep the four amplifier input and feedback networks close to their corresponding SOIC pins, and provide a low-impedance ground return to the device. Avoid routing high-current or switching-node copper beneath the package. Because the four channels share the same supply pins, high transient current on one output can disturb the other three; place local supply bypass capacitance near the package and use separate output-current paths where necessary.
Estimated: with a 26 V total supply and the approximately 0.8 mA typical supply-current drain, the nominal device dissipation is 20.8 mW. Actual dissipation can increase with output load current because the output stage also dissipates power. Validate worst-case supply, output current, ambient temperature, and copper-area conditions against the package thermal limits rather than relying only on the no-load estimate.
The 1.2 MHz gain-bandwidth product makes loop gain sensitive to feedback-component values and parasitic capacitance at higher closed-loop gains. Keep compensation and feedback parts compact, avoid excessive output loading, and verify settling time for the required signal bandwidth. For precision or high-speed channels, calculate the noise and error contributions rather than assuming the general-purpose LM2902 performance is sufficient.
معلومات الامتثال
RoHS compliance is identified in the LM2902DRG3 product listing. No separate REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was established for this exact orderable MPN.
