LM2902NG - 4-Channel 1MHz Op Amp in 14-PDIP | onsemi
MPN: LM2902NG ✓ فعالLM2902NG نمای کلی
An operational amplifier, or op amp, is a high-gain differential-input amplifier that uses negative feedback to control gain and improve linearity. In the product hierarchy, the LM2902NG belongs to the general-purpose operational-amplifier class, within analog amplifier ICs and integrated circuits. Unlike rail-to-rail precision amplifiers, this device is intended primarily for conventional supply rails where adequate input and output common-mode ranges are available.
The four integrated channels make the LM2902NG useful where several independent low-frequency analog functions are required. Its 1 MHz bandwidth supports general-purpose gain and signal conditioning above DC, while true differential inputs suit instrumentation and feedback networks. The 7 mV typical input offset and 50 dB minimum CMRR should be considered when precision requirements are moderate rather than stringent.
Each amplifier includes the internal characteristics expected of a practical general-purpose quad op amp, including differential input support, output drive capability, and operation from a single power supply. The 14-pin PDIP format facilitates inspection, prototyping, and through-hole assembly. Designers requiring a surface-mount implementation should select a compatible alternative package rather than attempting to mount the PDIP directly.
Typical applications include sensor-signal conditioning, low-level signal buffering, active filtering, transducer-interface circuits, test equipment, industrial control systems, and educational instrumentation. The four-channel organization can reduce component count and simplify board allocation when an analog subsystem needs two or more gain stages.
Design with the supply voltage, common-mode input range, output swing, and output-current limits defined by the manufacturer datasheet. Decoupling capacitors should be placed close to the supply pins, and input, feedback, and output routing should avoid long traces susceptible to noise pickup.
This product page combines manufacturer and distributor technical details, package guidance, application analysis, replacement criteria, and PCB-oriented design notes. It is intended to help engineers identify whether the LM2902NG's four-channel architecture and 14-PDIP footprint fit a single-supply analog design before committing to a BOM.
جایگزین‌های drop-in برای LM2902NG — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای LM2902NG (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Mounting Type, Amplifier Type, Package.
LM2902N
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LM2902-N
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LM2902D
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←LM2902NG حداکثر مقادیر مجاز و مشخصات الکتریکی
| Number of Channels | 4 channels |
| Amplifier Type | 4-circuit general-purpose operational amplifier |
| Gain-Bandwidth Product | 1 MHz |
| Output Current | 40 mA |
| Common-Mode Rejection Ratio | 50 dB minimum |
| Input Offset Voltage | 7 mV typical |
| Input Architecture | True differential inputs |
| Power Supply Configuration | Single supply |
| بسته‌بندی | 14-PDIP, 14 pins |
| نوع نصب | Through-hole |
| وضعیت RoHS | Unknown |
راهنمای پیکربندی پین LM2902NG 14-pdip, 14 pins
پیکربندی پین برای LM2902NG (پکیج 14-pdip, 14 pins). این قطعه آنالوگ دارای پین‌های ورودی، خروجی و تغذیه است. برای پیکربندی‌های پین offset null، جبران‌سازی و فعال‌سازی به دیتاشیت سازنده مراجعه کنید. ایده‌آل برای مدارهای شرطی‌سازی سیگنال و تقویت‌کننده.
داده پین‌آوت تفصیلی موجود نیست برای LM2902NG.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
LM2902NG مناسب است برای 6 کاربردs: Sensor Signal Conditioning, Active Filtering, Industrial Control Signal Conditioning, Test and Measurement Buffering, Audio and Communication Buffers, Power Supply Monitoring and Control Loops.
Sensor Signal Conditioning
The onsemi LM2902NG suits general sensor interfaces that require differential input amplification and several independent analog channels. Its true differential inputs help reject common-mode noise when a sensor is connected through balanced wiring, while the 1 MHz bandwidth supports signals extending beyond DC. The 50 dB minimum CMRR and 7 mV typical input offset make it appropriate for cost-sensitive instrumentation rather than precision metrology. Four channels can condition multiple sensor outputs or combine gain, filtering, and driver stages. Verify the input common-mode range and output swing against the actual sensor excitation and supply voltage before finalizing the signal path.
پیشنهادی
Active Filtering
The LM2902NG can implement active low-pass, high-pass, or band-pass networks where four channels provide useful flexibility on one board. A 1 MHz gain-bandwidth product is appropriate for filters covering low-frequency process-control and instrumentation bands, and the approximately 40 mA output capability supports ordinary passive-filter load networks. Component tolerances and the amplifier's finite gain and slew behavior determine practical filter accuracy. Keep the selected feedback components close to the relevant amplifier pins, maintain stable reference grounding, and confirm that the operating frequency remains comfortably below the closed-loop bandwidth required by the filter gain.
پیشنهادی
Industrial Control Signal Conditioning
The onsemi LM2902NG is appropriate for industrial control modules that need inexpensive, multi-channel gain and buffering around sensors, transducers, or analog computation stages. Its single-supply capability simplifies systems that derive only positive rails, and its four channels can reduce the number of packages required for repeated analog functions. The 1 MHz bandwidth is ample for many process signals, although motor environments can introduce high-frequency switching noise. Maintain short ground returns, provide local supply bypassing, and compare the signal bandwidth with the amplifier's gain-bandwidth limit. An isolated or precision amplifier may be preferable when accuracy or high noise rejection dominates.
پیشنهادی
Test and Measurement Buffering
The LM2902NG can buffer inputs in educational instruments, bench-test fixtures, and general-purpose measurement equipment. Four channels allow one package to support source followers, difference amplifiers, and input conditioning stages for several measured nodes. Its 1 MHz bandwidth accommodates many low-frequency laboratory signals, while the 14-PDIP package is convenient for prototyping and through-hole instrument construction. Use stable references, clean grounding, and short input leads to prevent pickup from cables and test fixtures. For instrumentation requiring sub-millivolt offset, low input bias current, or rail-to-rail input operation, choose a precision amplifier rather than treating this general-purpose quad as a laboratory-grade substitute.
پیشنهادی
Audio and Communication Buffers
The LM2902NG can serve as a general-purpose buffer or gain stage in line-level audio, communications, and interface circuits where a 1 MHz bandwidth is sufficient. True differential inputs permit subtraction of two related signals, and the approximately 40 mA output current is adequate for conventional low-load buffering. The device is not positioned as a low-noise, high-linearity audio amplifier, so system noise requirements should be checked against the manufacturer datasheet. Use short traces, stable supply decoupling, and an appropriate output-load network. For high-fidelity audio paths, precision low-noise amplifiers offer lower distortion and noise than this general-purpose device.
پیشنهادی
Power Supply Monitoring and Control Loops
The four channels of the LM2902NG can monitor several control-system voltages or participate in simple error amplifiers around regulated power systems. A 1 MHz small-signal bandwidth supports feedback loops far below the switching frequencies commonly found in low-frequency control applications, and the single-supply architecture is convenient for positive-only systems. The 7 mV typical input offset may create a measurable error in high-accuracy feedback paths, so resistor networks and system requirements should be evaluated. Keep feedback traces short and place supply-decoupling capacitors close to the package. Dedicated supervisors are preferable when the function requires threshold accuracy, hysteresis, and fault signaling.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای LM2902NG — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | LM2902N | LM2902-N | LM2902 |
|---|---|---|---|---|
| Brand | onsemi | onsemi | Texas Instruments | Texas Instruments |
| Package | 14-PDIP | 14-PDIP | 14-PDIP | 14-PDIP |
| Number of Amplifier Channels | 4 channels | 4 channels | 4 channels | 4 channels |
تفاوت‌های کلیدی
- Four integrated amplifiers in one through-hole package (در مقابلLM2902N)
- TI identifies a functional upgrade path (در مقابلLM2902-N)
- Higher bandwidth but higher offset than the target (در مقابلLM2902)
یادداشت‌های طراحی
Place the supply-decoupling capacitor immediately between the package supply pin and ground pin. Keep input and feedback traces short, avoid routing them adjacent to high-current switching paths, and use a quiet ground reference for analog signals. The through-hole package provides generous spacing, but lead placement can still create long loops if the capacitor is moved to a distant board location.
Use the 1 MHz gain-bandwidth product to set the usable operating range for each closed-loop stage. Higher closed-loop gain reduces bandwidth, so a 10x amplifier provides roughly one tenth of the small-signal bandwidth available at unity gain. Check source impedance, capacitive loading, and output-swing requirements in the manufacturer datasheet before using the amplifier near its bandwidth or drive limits.
Do not assume that every LM2902-family ordering code has identical package dimensions or compliance attributes. Confirm the 14-PDIP footprint, amplifier-channel assignments, supply limits, common-mode input range, and output swing against the exact manufacturer datasheet. This is particularly important when changing from LM2902NG to an LM2902 or LM2902-N second source.
اطلاعات انطباق
The available product information does not establish the complete compliance status of the exact LM2902NG ordering suffix. The device is a general-purpose industrial amplifier rather than an explicitly automotive-qualified AEC-Q100 option.
