LM2902DRG4 - Quad 26V 1.2MHz Op Amp | Texas Instruments
MPN: LM2902DRG4 ✓ Hoạt độngLM2902DRG4 Tóm tắt
An operational amplifier is an analog integrated circuit that uses differential feedback to amplify the difference between two input voltages. The LM2902 belongs to the operational-amplifier hierarchy, where it combines transistor-level input and output stages with internal compensation. Each of its four channels can perform amplification, buffering, comparison, summation, differential sensing, or active-filter functions without requiring a separate amplifier for every signal path.
The device provides a 1.2 MHz gain-bandwidth product and a 2 mV input-offset specification, making it suitable for moderate-bandwidth precision applications. The 26 V supply capability also supports higher-voltage industrial interfaces than low-voltage rail-to-rail amplifiers. Texas Instruments specifies an operating temperature range from -40°C to 125°C, allowing operation across demanding commercial and industrial environments.
The four amplifiers share one package while retaining independent input and output pins, allowing one IC to implement several analog functions. Their typical design role is to operate with feedback networks that establish closed-loop gain and filtering. Because the device is not rail-to-rail by specification, input and output common-mode limits must be checked against the selected supply voltage and signal range before layout release.
Typical uses include transducer signal conditioning, low-frequency active filters, sensor amplifiers, industrial control loops, comparator-style threshold circuits, and audio or communications interface stages. The SOIC package also simplifies inspection and rework on through-hole industrial boards while providing a familiar 14-pin land pattern.
For a new design, verify the input and output common-mode range, output-current capability, load impedance, and supply operating limits at the intended signal amplitude. Stable feedback and proper decoupling remain important even when the application is a unity-gain buffer, so use the manufacturer pin-description table when assigning PCB tracks.
This page organizes the LM2902DRG4 specifications, verified manufacturer references, same-package alternatives, application guidance, and comparison points. It also highlights the practical checks needed to determine whether a candidate replacement is truly pin-compatible rather than merely functionally similar.
Bộ thay thế dễ dàng lắp đặt cho LM2902DRG4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LM2902DRG4 (cùng hình factor và footprint) — khác nhau ở Amplifier Type, Input Offset Voltage, Package.
LM2902KDR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2902KDRE4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM2902B
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LM324BAIDR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LM2902DRG4 Tỷ lệ tối đa & tính chất điện
| Number of Amplifier Channels | 4 channels |
| Maximum Supply Voltage | 26 V |
| Gain-Bandwidth Product | 1.2 MHz |
| Input Offset Voltage | 2 mV |
| Minimum Common-Mode Rejection Ratio | 50 dB |
| Typical Supply Current | 0.8 mA |
| Single-Supply Maximum Voltage | 26 V |
| Dual-Supply Maximum Voltage | +13 V |
| Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | 125°C |
| Hộp | SOIC-14 (D) |
| Số lượng chân | 14 pins |
| Kiểu lắp đặt | Surface mount |
| Amplifier Type | General-purpose operational amplifier |
Hướng dẫn cấu hình chân LM2902DRG4 soic-14 (d)
Cấu hình chân cho LM2902DRG4 (soic-14 (d) gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho LM2902DRG4.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
LM2902DRG4 phù hợp cho 6 Áp dụngs: Industrial Sensor Signal Conditioning, Active Audio and Control Filtering, Precision Threshold Detection, Data Acquisition Front Ends, Communication Interface Conditioning, Portable and Battery-Powered Instruments.
Industrial Sensor Signal Conditioning
The LM2902DRG4 is suitable for conditioning low-frequency industrial sensor signals because its four channels can amplify several inputs without using separate amplifier packages. The 2 mV input-offset specification and 50 dB minimum common-mode rejection ratio help preserve weak sensor information, while the 1.2 MHz gain-bandwidth product supports moderate closed-loop bandwidth. Use one channel for the sensor input, another for gain or filtering, and confirm that the sensor output remains inside the amplifier's common-mode range. A 26 V maximum supply also permits operation from industrial rails when the overall design otherwise remains within the device's electrical limits.
Được đề xuất
Active Audio and Control Filtering
The LM2902DRG4 can implement active low-pass, high-pass, or band-pass stages where the required bandwidth is well below its 1.2 MHz gain-bandwidth product. Four independently fed-back channels allow a compact implementation of cascaded or parallel filters, which is useful in audio, communications-interface, and industrial control equipment. The 0.8 mA typical supply-current figure helps limit power demand in multi-channel systems. Component tolerances and the op-amp's finite gain-bandwidth should be included in filter calculations, while the output must remain within the device's load and swing capabilities.
Được đề xuất
Precision Threshold Detection
The LM2902DRG4 can serve as a threshold amplifier or comparator-like stage in control and instrumentation systems, with two channels handling reference conditioning and two handling the sensed signals. Its 2 mV input-offset specification defines the baseline accuracy around which the threshold decision is made, and the 50 dB minimum common-mode rejection ratio reduces differential interference. Operation remains limited by input and output common-mode ranges, so the threshold reference must be designed around the selected supply voltage. A pullback or pull-up arrangement at the output may also be needed when the next stage requires a logic-compatible voltage.
Được đề xuất
Data Acquisition Front Ends
The LM2902DRG4 is appropriate for buffering and amplifying moderate-bandwidth signals at the input of a data-acquisition system. Four channels can handle separate sensor lines, while the 1.2 MHz gain-bandwidth product provides useful margin below the bandwidth of many low-speed measurement systems. The 26 V maximum supply capability supports interface designs operating above conventional low-voltage analog rails, provided the signal and output levels remain compliant. Layout should minimize input-node capacitance and use a stable reference return because excessive loading or ground offset can directly affect acquisition accuracy.
Được đề xuất
Communication Interface Conditioning
The LM2902DRG4 can provide gain, level conditioning, and impedance buffering in low-speed communication interface circuits. Its four-channel organization is useful for differential receiver stages, transmit-driver support circuits, and threshold-recovery functions. The 1.2 MHz gain-bandwidth product is appropriate for many baseband and control signals rather than high-speed data links, and the 2 mV offset specification helps maintain a predictable transition point. Designers should verify common-mode limits against the line voltage, use short feedback paths, and avoid driving capacitive loads that could cause instability.
Được đề xuất
Portable and Battery-Powered Instruments
The LM2902DRG4 can serve low-frequency instrumentation in portable equipment when its supply and common-mode requirements fit the available battery-derived rail. The typical 0.8 mA supply-current specification supports low system overhead, while four amplifiers reduce the package count compared with four single-channel devices. Because the maximum supply rating is 26 V, the device is particularly useful in industrial or instrument designs with a protected higher-voltage rail rather than in the lowest-power portable systems. A regulator should provide local decoupling, and unused channels should be configured according to the manufacturer guidance.
Được đề xuất
Dữ liệu tham khảo kỹ thuật cho LM2902DRG4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LM2902KDR | LM2902KDRE4 | LM2902B | LM324B |
|---|---|---|---|---|---|
| Package | SOIC-14 (D) | SOIC-14 (D) | SOIC-14 (D) | SOIC-14 (D) | SOIC-14 (D) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Manufacturer Drop-In Relationship | LM2902 family | Identified as a similar 14-pin SOIC device | Identified as a similar 14-pin SOIC device | Manufacturer states LM2902B can drop in for LM2902 versions | Manufacturer states LM324B can drop in for LM2902 versions |
Bảo phân biệt quan trọng
- Four general-purpose amplifiers in one 14-pin package (vsLM2902KDR)
- Manufacturer-supported family replacement path (vsLM2902B)
- Broader supply capability through the related family (vsLM324B)
Ghi chú thiết kế
Verify the actual rail voltage and signal levels against the 26 V maximum supply specification before energizing the board. The LM2902 is not described as rail-to-rail, so input common-mode and output-swing limits can restrict operation even when the supply itself is valid. Place the device's supply-decoupling capacitor close to the package and keep sensitive feedback and reference traces away from switching-current paths.
Assign PCB connections from the manufacturer pin-description table rather than inferring channel order from the SOIC outline. Keep each op-amp's feedback components close to its output and inverting-input pins, and avoid routing high-current or digital signals beneath the analog package. A solid ground plane and short ground returns reduce offset and common-mode errors in multi-channel sensor-conditioning circuits.
Do not treat the 1.2 MHz gain-bandwidth product as the usable closed-loop bandwidth for every gain setting. Higher closed-loop noise gain reduces bandwidth and phase margin, while large capacitive loads can cause oscillation. Confirm stability using the manufacturer's stability and output-capacitance guidance, and avoid leaving an amplifier channel's inputs floating.
For low-level sensor inputs, keep the input node physically small and protect it from leakage, contamination, and nearby switching nodes. Input-bias-current effects become more important with high source impedances even when the 2 mV offset specification is suitable. Use guarding or a differential input arrangement where offset drift and bias-current error could obscure the measured signal.
Thông tin tuân thủ
The cited manufacturer and distributor pages do not explicitly state the requested compliance statuses for LM2902DRG4. Confirm RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification status using the current Texas Instruments product documentation before release.
