LM2902DR2G - Quad 3-26V Operational Amplifier | onsemi
料号： LM2902DR2G ✓ 量产中LM2902DR2G 概述
A general-purpose operational amplifier is a voltage-amplifying active device that uses differential inputs and feedback to control gain, filtering, buffering, and signal conditioning. The quad LM2902 family combines four amplifiers within one semiconductor package, reducing board area and simplifying designs that require multiple independent analog channels. The LM2902DR2G is associated with the onsemi LM2902 family and is identified by distributor listings as a single-supply quad operational amplifier in a 14-SOIC package.
The key device characteristics are the four-amplifier configuration, 3 V to 26 V supply range, 14-SOIC package, and general-purpose single-supply operation. These specifications make the device suitable for industrial control systems, sensor interfaces, low-frequency signal conditioning, audio and communications support circuits, and general instrumentation. Because the LM2902 is a general-purpose amplifier rather than a precision or high-speed part, designers should verify input bias current, output swing, noise, slew rate, and stability requirements against the manufacturer datasheet for the actual operating conditions.
In a typical single-supply design, the LM2902 is powered from a positive supply while the signal source and reference point are biased near ground. Decoupling capacitors should be placed close to the supply pins, and unused amplifier inputs should be biased so that they remain in a defined operating state. Feedback-network values determine gain and bandwidth, so resistor and capacitor tolerances directly influence signal accuracy. The device should also be evaluated for output-current capability and thermal rise when driving capacitive loads or operating at elevated temperatures.
Common uses include sensor signal conditioning, low-level instrumentation, control-loop input stages, active filtering, waveform conditioning, and general-purpose buffering. The 14-SOIC package provides a familiar footprint for designs using standard through-hole assembly, although the exposed thermal behavior and electrical limits remain important at higher ambient temperatures. The LM2902DR2G is therefore best suited to cost-sensitive, low-to-moderate-frequency analog systems where four channels and single-supply convenience matter more than precision or high bandwidth.
This page summarizes the device identity, package, operating range, sourcing information, drop-in alternatives, application guidance, and engineering considerations for engineers evaluating LM2902DR2G. The manufacturer datasheet should be consulted for the complete electrical characteristics, recommended operating conditions, pinout, and application details before final circuit release.
直接替换替代料： LM2902DR2G ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LM2902DR2G （相同外形与封装尺寸） ——差异在于 Amplifier Type, Package, Input Type, Slew Rate, Number of Channels.
LM2902DG
✅ 直接替换联系询价
查看数据手册 →NCV2902DR2G
✅ 直接替换📋 参考替代料（不在目录中）
LM324DR2G
✅ 直接替换联系询价
查看数据手册 →LM224DR2G
✅ 直接替换📋 参考替代料（不在目录中）
LP2902M/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
LM2902DR2G 最大额定值与电气特性
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 4 |
| Supply Voltage Range | 3 V to 26 V |
| Supply Type | Single supply |
| 封装 | 14-SOIC |
| 安装类型 | Surface mount |
| Application Category | Instrumentation, operational amplifiers, buffer amplifiers |
| Input Type | Differential input |
| 工作温度范围 | -40 C to +105 C |
| RoHS 状态 | Compliant |
| REACH Status | Unaffected |
| MSL | 1 (unlimited) |
| AEC-Q100 Qualification | Not applicable |
| 引脚数量 | 14 |
LM2902DR2G 引脚配置
| 引脚 1 | OUT A — Output of amplifier A |
| 引脚 2 | IN- A — Inverting input of amplifier A |
| 引脚 3 | IN+ A — Non-inverting input of amplifier A |
| 引脚 4 | V- — Negative supply or ground connection |
| 引脚 5 | IN+ B — Non-inverting input of amplifier B |
| 引脚 6 | IN- B — Inverting input of amplifier B |
| 引脚 7 | OUT B — Output of amplifier B |
| 引脚 8 | OUT C — Output of amplifier C |
| 引脚 9 | IN- C — Inverting input of amplifier C |
| 引脚 10 | IN+ C — Non-inverting input of amplifier C |
| 引脚 11 | V+ — Positive supply input |
| 引脚 12 | IN+ D — Non-inverting input of amplifier D |
| 引脚 13 | IN- D — Inverting input of amplifier D |
| 引脚 14 | OUT D — Output of amplifier D |
典型应用
LM2902DR2G 适用于 6 应用s: Sensor Signal Conditioning, Industrial Instrumentation, Control-System Interface, Active Filtering, Audio Interface Conditioning, General-Purpose Buffering.
Sensor Signal Conditioning
LM2902DR2G is suitable for conditioning outputs from resistive, resistive-divider, and low-current sensors. A buffer channel can isolate the sensor from downstream filtering, while another channel provides gain or active offset. The four-channel arrangement allows one device to implement several analog functions in a compact 14-SOIC footprint. Designers should check the input bias current against the sensor’s source impedance, verify that the signal remains inside the input common-mode range, and confirm the output swing at the selected supply voltage.
推荐
Industrial Instrumentation
The LM2902DR2G supports general-purpose instrumentation tasks where several low-frequency analog channels must share a single supply. It can provide input buffering, differential amplification, voltage scaling, and active filtering in one package. Its 3 V to 26 V operating range supports low-voltage and industrial supply arrangements, while the 14-SOIC package supports conventional PCB assembly. For instrumentation, preserve analog ground integrity, keep feedback loops compact, and validate offset and bias-current errors against the measurement resolution required by the system.
推荐
Control-System Interface
LM2902DR2G can form input conditioning and actuator-drive stages around low-frequency industrial control loops. Its four channels may be assigned to sensor amplification, reference buffering, error amplification, and output buffering. The general-purpose architecture is effective when the loop bandwidth is modest and the circuit must operate from a single supply. Check the output-current capability against actuator interface requirements, add adequate local decoupling, and avoid driving long capacitive loads unless the datasheet stability conditions are met.
推荐
Active Filtering
The LM2902DR2G can implement first-order or cascaded active filters in audio, communications, and control systems. Multiple amplifier channels make it convenient to build low-pass, high-pass, or notch stages without using separate packages. Stable operation depends on the selected gain, noise gain, feedback capacitor, and load conditions, so the design should be simulated and checked against the manufacturer’s stability guidance. Keep the filter’s ground return short and place input and feedback components close to the associated amplifier pins.
推荐
Audio Interface Conditioning
LM2902DR2G is useful for general audio interface tasks such as input buffering, gain staging, impedance conversion, and simple active filtering. The four-channel device can support multiple signal paths in a 14-SOIC package, although it is a general-purpose amplifier rather than a dedicated low-noise audio part. Verify input-referred noise, distortion, slew rate, and output swing against the audio bandwidth and load. Decouple the supply locally and route audio return current carefully to reduce channel-to-channel coupling.
推荐
General-Purpose Buffering
LM2902DR2G provides four general-purpose amplifier channels for buffering high-impedance sources, isolating ADC drivers, and implementing simple gain stages. Buffering reduces source-loading effects when the next circuit stage presents a substantially different impedance. Use a unity-gain configuration for straightforward isolation, and confirm stability with the intended capacitive load. The 14-SOIC package offers four channels in one footprint, but unused inputs should be tied to a defined reference rather than left floating.
推荐
推荐产品汇总
工程参考数据： LM2902DR2G ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LM2902DG | NCV2902DR2G | LM324DR2G | LM224DR2G | LP2902M/NOPB |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | Texas Instruments |
| Number of Amplifiers | 4 | 4 | 4 | 4 | 4 | 4 |
关键差异点
- Four general-purpose channels in one 14-SOIC package （对比 LM324DR2G)
- Single-supply operation from 3 V to 26 V （对比 LM224DR2G)
- Established onsemi LM2902 family sourcing path （对比 LP2902M/NOPB)
设计说明
Place the LM2902DR2G bypass capacitor directly between the supply pin and the appropriate ground return, keeping the loop short. Route the four amplifier outputs away from sensitive input traces, and place feedback resistors and capacitors close to the corresponding amplifier pins. This reduces parasitic inductance, supply coupling, and feedback-loop pickup.
Do not leave unused amplifier inputs floating. Tie each unused input to a defined reference point while ensuring that the amplifier remains within its input common-mode range. Also verify output swing at the selected supply voltage; a single-supply circuit can leave little headroom at the lower rail even when the nominal output target is modest.
Estimated: calculate amplifier dissipation as the product of supply voltage, output voltage, and output current, then account for the input and output quiescent currents. Confirm that the resulting junction-temperature estimate stays below the manufacturer’s operating limit. The 14-SOIC package and the -40 C to +105 C ambient rating do not remove the need for thermal review at high load.
For higher-impedance sources, compare the LM2902 input bias current with the source impedance because bias current can create a voltage error. For capacitive loads, use the datasheet stability guidance and add an isolation resistor when required. These checks are especially important when the quad device drives ADC inputs, long cables, or switched-capacitor circuits.
合规信息
The cross-reference listing identifies the LM2902DR2G as RoHS3 compliant, REACH unaffected, and MSL 1. Lead-free, halogen-free, and conflict-minerals status are not stated for the exact MPN.
