LM2902MX - Quad 26V 1.2MHz Op Amp | Texas Instruments
MPN: LM2902MX ✓ نشطLM2902MX نظرة عامة
An operational amplifier is an analog signal-conditioning IC that compares voltages applied to its inverting and non-inverting inputs and drives its output to amplify the difference between them. The LM2902 belongs to the operational-amplifier hierarchy within analog ICs and semiconductor devices. Its internal frequency compensation makes it suitable for closed-loop gain stages without an external compensation network, simplifying industrial, instrumentation, and control-system designs.
Key characteristics include four amplifier channels, a 1.2 MHz typical gain-bandwidth product, a 2 mV typical input offset voltage, and a typical open-loop DC gain of 100 dB. These characteristics support general-purpose applications involving signal buffering, current-to-voltage conversion, differential amplification, filtering, and low-frequency closed-loop control. A broad common-mode input range and single-supply capability make the device practical for circuits powered from industrial and automotive-style rails.
The LM2902MX uses a bipolar amplifier architecture. Internal frequency compensation stabilizes operation at unity gain and simplifies PCB implementation, but the device is intended primarily for lower-frequency analog signals rather than high-speed signal chains. Its 1.2 MHz gain-bandwidth product should be considered when selecting closed-loop gain because bandwidth decreases as gain increases, which can affect signal rise time, phase margin, and loop stability.
Typical uses include transducer-signal conditioning, industrial sensor interfaces, current-loop receivers, audio preamplification, analog-control feedback networks, and four-channel instrumentation systems. Multiple independent amplifier sections can process related signals without requiring four separate packages, reducing board area and simplifying power distribution. The quad organization is particularly useful when a design repeats the same amplifier topology across several measurement or control channels.
Design the power rails and input common-mode range so they remain within the amplifier's operating limits throughout startup, load transients, and fault conditions. Place input and output bypassing capacitors close to their associated pins, keep feedback paths compact, and avoid long parallel traces that can increase noise pickup. Confirm stability at the intended closed-loop gain and temperature before releasing the PCB layout.
This page combines the device's principal electrical characteristics with application guidance, package details, drop-in replacement analysis, and an engineering comparison table. It is intended to help designers determine whether the LM2902MX's four-channel architecture, electrical limits, and 14-pin SOIC footprint fit a new analog design.
بدائل مباشرة لـ LM2902MX — 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 LM2902MX (نفس عامل الشكل والبصمة) — يختلف في Number of Amplifier Channels, Package.
LM2902MX/NOPB
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2902DRE4
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2902KVQDR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
LM2902MX
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2902DG
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2902MX
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2902MX الحدود القصوى والخصائص الكهربائية
| Number of Amplifier Channels | 4 channels |
| Maximum Supply Voltage | 26 V |
| Typical Gain-Bandwidth Product | 1.2 MHz |
| Typical Input Offset Voltage | 2 mV |
| Typical Open-Loop DC Gain | 100 dB |
| Minimum Common-Mode Rejection Ratio | 50 dB |
| Amplifier Architecture | Bipolar |
| Frequency Compensation | Internally frequency compensated |
| Supply Configuration | Single supply |
| العلبة | 14-pin SOIC |
| نوع التركيب | Surface mount |
| حالة RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
دليل تكوين أطراف LM2902MX 14-pin soic
تكوين الأطراف لـ LM2902MX (حزمة 14-pin soic). يتميز هذا المكوّن التناظري بأطراف الإدخال والإخراج وإمداد الطاقة. راجع ورقة بيانات الشركة المصنعة لتكوينات طرف إلغاء الإزاحة والتعويض والتمكين. مثالي لدوائر تكييف الإشارة والمضخمات.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ LM2902MX.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
LM2902MX مناسب لـ 6 التطبيقs: Industrial Sensor Signal Conditioning, Current-to-Voltage Conversion, Audio Preamplification, Analog Control and Feedback Networks, Data Acquisition Front Ends, Automotive and High-Voltage Monitoring.
Industrial Sensor Signal Conditioning
The LM2902MX is suitable for conditioning four low-frequency industrial sensor signals on a common circuit board. Its 2 mV typical input offset voltage limits the amplifier's intrinsic input imbalance, while the 100 dB typical open-loop DC gain provides useful closed-loop gain for common sensor-interface topologies. Place one amplifier section on each transducer channel, use the 26 V maximum supply rating to plan industrial rail headroom, and keep feedback and sensor-return routing short. The 1.2 MHz gain-bandwidth product is substantially above many process-control signal rates, but closed-loop bandwidth must still be checked against the selected noise gain and the required isolation from switch-node transients.
موصى به
Current-to-Voltage Conversion
The LM2902MX can implement four independent transimpedance stages for current-output sensors, shunt monitors, and process-control loops. A practical design uses the amplifier with a feedback resistor to convert sensor current into voltage, with the feedback resistance and input bias current determining the achievable accuracy. The 2 mV typical offset contributes to the output error, making careful bias-current and temperature analysis important for slow but high-resolution measurements. Its 1.2 MHz typical gain-bandwidth product leaves bandwidth for practical compensation capacitors, although every feedback capacitor and sensor capacitance should be checked against the required closed-loop response.
موصى به
Audio Preamplification
The LM2902MX can provide four low-frequency preamplifier or mixer channels in consumer, industrial, and instrumentation equipment. The internally frequency-compensated amplifiers support simple noninverting and inverting stages without external compensation components, while the 1.2 MHz typical gain-bandwidth product covers audio-band signals. Use the 2 mV typical input offset and 50 dB minimum CMRR figures as starting points for the channel error budget. Headphone, microphone, and line-level designs should also verify output swing, noise, slew behavior, supply configuration, and output-load stability against the manufacturer's test conditions.
موصى به
Analog Control and Feedback Networks
The LM2902MX is appropriate for four channels of analog control, error amplification, actuator drive, and feedback in industrial equipment. Its four amplifiers can implement different gain stages within one package while sharing a common supply and ground reference. The 26 V maximum supply voltage provides useful headroom for 24 V industrial systems, but the actual operating supply must remain inside the complete absolute-maximum and common-mode limits. For loop stability, verify phase margin at the intended noise gain rather than relying only on the 1.2 MHz gain-bandwidth product, especially when driving capacitive loads or sampling near the amplifier bandwidth.
موصى به
Data Acquisition Front Ends
The LM2902MX can serve as the first amplification stage for low-speed data-acquisition channels when source impedance and required bandwidth are compatible with the device. Four independent channels reduce package count on multiplexed measurement boards, and the typical 1.2 MHz gain-bandwidth product supports common sensor-bandwidth signals. The 2 mV typical offset must be included alongside source noise, input bias current, drift, and resistor errors in the total measurement uncertainty. Keep input traces short, use guarding where leakage matters, and establish the required anti-alias filtering before the signal reaches downstream conversion circuitry.
موصى به
Automotive and High-Voltage Monitoring
The LM2902MX can support low-frequency sensing and control interfaces in non-harsh 24 V systems because it supports a 26 V maximum total supply. Four channels allow repeated monitoring of vehicle or machinery inputs without requiring four separate packages. The LM2902KVQDR ordering option is relevant when an automotive-qualified family variant is required, while LM2902MX should be selected only when its exact qualification and temperature characteristics satisfy the system requirements. Transients, load dumps, reverse-battery conditions, and temperature extremes must be handled by the surrounding protection network; the amplifier's nominal 26 V rating alone is not a surge withstand specification.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM2902MX — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LM2902MX/NOPB | LM2902DRE4 | LM2902KVQDR | LM2902MX | LM2902DG |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | onsemi |
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Number of Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
أبرز الفروقات
- Exact Texas Instruments family ordering option (مقابلLM2902DRE4)
- Automotive-oriented ordering option within the same family (مقابلLM2902MX)
- Higher typical bandwidth than the onsemi LM2902DG comparison part (مقابلLM2902DG)
- Lower listed input offset than the Fairchild-manufactured LM2902MX (مقابلLM2902MX)
ملاحظات التصميم
Place the input, output, and supply bypass capacitors close to the associated LM2902MX pins, following the manufacturer datasheet's recommended component values and layout. Keep feedback resistors and their compensation components compact, and avoid routing input traces parallel to switching-node or motor-drive conductors. Use a continuous ground reference for all four amplifier sections; four channels on one package share supply and ground resources, so uneven return currents can couple noise between measurement channels.
Do not assume that any 14-pin quad amplifier is pin-compatible with LM2902MX. Verify the manufacturer pin-description table, supply rating, input common-mode range, output swing, input bias current, and frequency compensation. The LM2902 family supports a 26 V maximum supply, so a 24 V industrial rail has limited transient headroom. Protection networks may be required for load dumps, inductive kickback, or supply overshoot because the nominal maximum rating is not a surge rating.
Check closed-loop stability at the highest intended noise gain rather than selecting gain solely from the 1.2 MHz typical gain-bandwidth product. Add the sensor or source capacitance to the amplifier input model, then evaluate feedback compensation and output loading. A large input or output capacitance can reduce phase margin even when the nominal closed-loop bandwidth appears adequate. Use the manufacturer's printed or simulated test conditions as the reference when comparing LM2902 alternatives.
معلومات الامتثال
Compliance status must be confirmed for the exact manufacturer and full ordering suffix. The LM2902MX/NOPB designation indicates a lead-free termination option, but no broader compliance claim is established here.